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On the Al-Salam-Carlitz orthogonal q-polynomials
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: L. Khériji --- , TunisiaWe use the q-integral representation for the Rogers-Szegö polynomials to highlight a discrete measure of the Al-Salam-Carlitz form u(a, q) associated with the Al-SAlam-Carlitz polynomials of the first kind in the positive definite case a < 0, 0... -
Polychlorinated biphenyl accumulation and hepatic EROD activity in golden grey mullet Liza aurata from Tunis Bay, southern Mediterranean
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Masmoudi --- UR Physiologie et Ecophysiologie des Organismes Aquatiques, Département des Sciences Biologiques, Faculté des Sciences de Tunis, Tunisia MS Romdhane --- , Tunisia S Khériji --- UR Physiologie et Ecophysiologie des Organismes Aquatiques, Département des Sciences Biologiques, Faculté des Sciences de Tunis, Tunisia M El Cafsi --- UR Physiologie et Ecophysiologie des Organismes Aquatiques, Département des Sciences Biologiques, Faculté des Sciences de Tunis, TunisiaLiza aurata was used as a bioindicator species to monitor contamination by organic xenobiotics of estuarine water at the outlet of Khélij channel [canal], Tunisia, from November 2002 to December 2003. Polychlorinated biphenyl (PCB) concentrations, including coplanar congeners, were measured... -
Effects of 17-α-estradiol on a free-living marine nematode community: a microcosm experiment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Essid --- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia F Boufahja --- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia H Beyrem --- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia P Aïssa --- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia E Mahmoudi --- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, TunisiaA microcosm experiment was used to examine the effects of 17-α-estradiol on a nematode community. Four 17-α-estradiol concentrations (0.15, 0.31, 0.62 and 1.24 ppm) were tested, and effects were examined after 30 days. Significant differences were noted between nematode assemblages... -
Nesting phenology and breeding performance of the Slender-billed Gull Chroicocephalus genei in Sfax salina, Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohamed Ali Chokri --- Unité de recherché UR-11ES86, Biodiversité et valorisation des bio-ressources en zones arides, Tunisia Slaheddine SelmiIn 2010, nine colonies of Slender-billed Gull Chroicocephalus genei bred at Sfax salina in south-eastern Tunisia totalling 7 912 breeding pairs. This amounted to >50% of the breeding population for the entire Mediterranean region. Colony initiation and egg laying occurred... -
Morphometric sexing of Mediterranean Yellow-legged Gulls Larus michahellis michahellis breeding in the Gulf of Gabès, southern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaDiscriminant analysis functions have previously been determined for sexing Mediterranean Yellow-legged Gulls Larus michahellis michahellis from the western Mediterranean basin. However, data from eastern Mediterranean populations are lacking. In this work, we used morphometric data from a sample of 81... -
Does Microfinance Promote Entrepreneurship and Innovation? A Macro Analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Noômen Lahimer --- , Tunisia Soumendra Dash --- Financial Management Department, African Development Bank, Tunisia Mahjouba Zaiter --- , TunisiaInnovative entrepreneurs in Africa experience a lack of financial support and underdeveloped financial systems. Microfinance could offer a solution to this complex issue. In this respect, this research paper studies the contribution of microfinance to the innovation process through entrepreneurship... -
Assessing Pharmaceutical Innovation in Tunisia: An Empirical Survey on Firms' Knowledge-Capital and an Analysis of the National Sectoral Innovation System
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management Sciences, TunisiaThe objective of this research was to assess pharmaceutical innovation in Tunisia. First, we examined the national sectoral innovation system (NSIS), focusing on the objectives and instruments of the industrial and innovation policy. Second, we adopted an empirical approach based... -
A prospective, randomised comparison of continuous paravertebral block and continuous intercostal nerve block for post-thoracotomy pain
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Ouerghi --- Department of Thoracic Surgery, Tunisia N Frikha --- Department of Anesthesiology, ICU and Emergency Medicine, Tunisia T Mestiri --- Department of Thoracic Surgery, Tunisia B Smati --- Department of Thoracic Surgery, Tunisia MS Mebazaa --- Department of Anesthesiology, ICU and Emergency Medicine, Tunisia T Kilani --- Department of Thoracic Surgery, Tunisia MS Ben Ammar --- Department of Anesthesiology, ICU and Emergency Medicine, TunisiaBackground: This study aimed to compare paravertebral block and continuous intercostal nerve block after thoracotomy. -
Genetic variation among spiny-footed lizards in the Acanthodactylus pardalis group from North Africa
Item type: Journal Article • Journal: African Zoology • Authors: Miguel M. Fonseca --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal José C. Brito --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal Hugo Rebelo --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal Mohsen Kalboussi --- Institut Sylvo-Pastoral, Tunisia Saïd Larbes --- Département de Biologie, Algeria Miguel A. Carretero --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal D. James Harris --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, PortugalThe systematics of the genus Acanthodactylus was classically based on external morphological traits, osteological characters and morphology of the hemipenes. Although the identification of species complexes is relatively easy, the distinction within some groups is difficult due to a high... -
Morphometric variation in the Tunisian green frog, Rana saharica Anura: Ranidae)
Item type: Journal Article • Journal: African Zoology • Authors: Nabil Amor --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, Tunisia Sarra Farjallah --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, Tunisia Khaled Said --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, TunisiaRana saharica is the most widely distributed anuran in Tunisia. We examined morphological variation in 124 specimens as a function of their geographical origin, using univariate and multivariate statistics with traditional morphometrics. Our results supported the existence of three morphotypes... -
Spatial distribution and community structure of phytoplankton, ciliates and zooplankton coupled to environmental factors in the Sousse saltern (Sahel of Tunisia)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Ghannay --- Faculté des Sciences de Sfax, Tunisia H Khemakhem --- Faculté des Sciences de Sfax, Tunisia H Ayadi --- Faculté des Sciences de Sfax, Tunisia J Elloumi --- Faculté des Sciences de Sfax, TunisiaThe composition and distribution of the main planktonic halophilic microorganisms were studied in 12 ponds of different salinity levels, ranging from 38 to 328, in the saltern of Sousse, Tunisia, in relation to environmental factors. Nutrient concentrations increased with decreasing... -
Genetic variation across Tunisian populations of the anuran species Discoglossus pictus and Pelophylax saharicus
Item type: Journal Article • Journal: African Zoology • Authors: Nabil Amor --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, Tunisia Guillermo Velo-Antón --- Department of Ecology and Evolutionary Biology, U.S.A Sarra Farjallah --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, Tunisia Khaled Said --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, TunisiaThe intraspecific variation of mitochondrial cytochrome b sequence was analysed for two widely distributed Tunisian anuran species, Discoglossus pictus and Pelophylax saharicus. We observed low genetic variation within both species (D. p. auritus 0.6% uncorrected genetic distances, P. saharicus 0.2%)... -
Lattice and Algebra Homomorphisms on C(X) in Zermelo-Fraenkel Set Theory
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Karim Boulabiar --- Laboratoire de Recherche LATAO, Département de Mathématiques, Faculté des Sciences de Tunis, TunisiaLet C (X) denote the lattice-ordered algebra of all real-valued continuous functions on a topological space X. This paper discusses in Zermelo-Fraenkel Set Theory the equivalence on C (X) between algebra homomorphisms, lattice homo- morphisms, and point evaluations. -
Critical types of krasnoselskii fixed point theorems in weak topologies
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Afif Ben Amar --- Department of Mathematics, Tunisia Tian Xiang --- Institute of Mathematical Sciences,In this note, by means of the technique of measures of weak noncom- pactness, we establish a generalized form of fixed point theorem for the sum of T+S in weak topology setups of a metrizable locally convex space, where S... -
Past and present fish species recorded in the estuarine Lake Ichkeul, northern Tunisia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Shaiek --- Research Unit Ecosystems and Aquatic Resources (UR13AGRO1), National Agronomy Institute of Tunisia (INAT), Tunisia C Fassatoui --- Research Unit Ecosystems and Aquatic Resources (UR13AGRO1), National Agronomy Institute of Tunisia (INAT), Tunisia MS Romdhane --- Research Unit Ecosystems and Aquatic Resources (UR13AGRO1), National Agronomy Institute of Tunisia (INAT), TunisiaLake Ichkeul in northern Tunisia is a Ramsar site, a MAB Biosphere Reserve and a UNESCO World Heritage Site. The system is one of the most important coastal wetlands in North Africa, especially as an over-wintering area for migratory birds,... -
Measures of weak noncompactness, nonlinear leray-schauder alternatives in banach algebras satisfying condition (p) and an application
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Amro Alsheikh Ali --- , , Tunisia Afif Ben Amar --- , , TunisiaIn this paper, we establish some new nonlinear Leray-Schauder alternatives for the sum and the product of weakly sequentially continuous operators in Banach algebras satisfying certain sequential condition (P). The main condition in our results is formulated in terms of... -
Integral and discrete representations of some H q -semiclassical forms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Manoubi Mejri --- , , TunisiaThe aim of this paper is to deduce integral and discrete representations of some H q -semiclassical forms of class one. These forms were studied by B. Bouras and F. Marcellan in [1], (Quadratic decomposition of a family of... -
Symmetric Intersections of Rauzy Fractals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Tarek Sellami --- , , Tunisia Víctor F. Sirvent --- , , VenezuelaIn this article we study symmetric subsets of Rauzy fractals of unimodular irreducible Pisot substitutions. The symmetry considered is reflection through the origin. Given an unimodular irreducible Pisot substitution, we consider the intersection of its Rauzy fractal with the Rauzy... -
Relationship between clutch size, egg volume and hatching success in a Yellow-legged Gull Larus michahellis colony in south-eastern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdessalem Hammouda --- Département des Sciences de la Vie, Tunisia Foued Hamza --- Département des Sciences de la Vie, Tunisia Jessica Pearce-Duvet --- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), France Slaheddine Selmi --- Département des Sciences de la Vie, TunisiaThis study aimed to test the hypothesis that clutch size covaries with egg volume and hatching success in the Yellow-legged Gull Larus michahellis. We determined clutch size and egg volume in a sample of 131 nests, and we used the... -
Sexual size dimorphism and morphometric sexing in a North African population of Laughing Doves Spilopelia senegalensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tasnim Ayadi --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Samia Kididi --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Mohamed Habib Yahyaoui --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences, TunisiaLike the majority of Columbiformes, the Laughing Dove Spilopelia senegalensis is sexually monomorphic in plumage, but seems to be slightly dimorphic in size. However, due to the lack of studies little is known about the sexual size dimorphism in this... -
Skull size and shape variation in Psammomys spp. (Rodentia, Gerbillinae) from Tunisia, with emphasis on the impact of allometric variation on species recognition
Item type: Journal Article • Journal: African Zoology • Authors: Hanene Khemiri --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Paolo Colangelo --- CNR, Italy M’barek Chétoui --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Saïd Nouira --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, TunisiaIn Tunisia both Psammomys obesus and P. vexillaris are found. These taxa have been the subject of taxonomic controversy for some time, due to variability in the classical morphological characters used for taxonomic recognition. In this study we investigated skull... -
Wintering waterbird assemblages in the central part of the Gulf of Gabès in southern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Foued Hamza --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaAlthough the Gulf of Gabès is recognised as an Important Bird Area, several aspects of the ecology of waterbirds inhabiting this area still need to be investigated. We observed how waterbird foraging guilds varied among habitats. In total, 49 species... -
Phenotypic variability in larvae of two species of Mediterranean spadefoot toad: an approach using linear and geometric morphometrics
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Daniel Escoriza --- , , Spain Jihène Ben Hassine --- , , TunisiaTwo species of the genus Pelobates occur in the western Mediterranean region: Pelobates cultripes, in the Iberian Peninsula and southern France, and Pelobates varaldii, endemic in northwestern Morocco. These two species form a monophyletic clade within the Eurasian Pelobates and... -
Sexual size dimorphism in a Tunisian population of Bosk's fringe-toed lizards Acanthodactylus boskianus asper
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Intissar Nasri --- , , Tunisia Abdessalem Hammouda --- , , Tunisia Foued Hamza --- , , Tunisia Slaheddine Selmi --- , , TunisiaInvestigating how patterns of sexual size dimorphism vary among local populations may be useful for understanding size evolution in lizards. We investigated patterns of sexual size dimorphism in a Tunisian population of Bosk's fringe-toed lizards Acanthodactylus boskianus asper, in relation... -
Factors determining the occurrence of Pleurodeles poireti (Caudata: Salamandridae) on Edough Peninsula, northeastern Algeria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jihène Ben Hassine --- , , Tunisia Daniel Escoriza --- , , Spain Badis Bakhouche --- , , AlgeriaPleurodeles poireti is one of the lesser-known amphibians in the Mediterranean region. This species is strictly endemic to the Edough Peninsula in northeastern Algeria. Here we investigated the factors that determine the presence of P. poireti, by affecting its selection... -
Maps generating the same primal space
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Sami Lazaar --- Department of Mathematics, Faculty of Sciences of Tunis, Tunisia Tom Richmond --- Department of Mathematics, USA Tarek Turki --- Department of Mathematics, Faculty of Sciences of Tunis, TunisiaAlexandroff topologies play an enigmatic role in topology. An important family of Alexandroff topologies are the functional Alexandroff spaces introduced by Shirazi and Golestani, and called primal topologies by O. Echi. The primal topology (f ) on X determined by... -
Genetic diversity within two Tunisian wild jirds: Meriones shawi and Meriones libycus (Rodentia, Gerbillinae)
Item type: Journal Article • Journal: African Zoology • Authors: Hanene Khemiri --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia João Pimenta --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal António Amorim --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal Pascale Chevret --- Laboratoire de Biométrie et Biologie Evolutive – UMR CNRS 5558, France Saïd Nouira --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Alexandra M Lopes --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, PortugalThree Meriones species inhabit Tunisia, namely M. shawi, M. libycus and M. crassus, but little genetic data exist on these gerbils. We collected Meriones from eight localities in Tunisia, and obtained mitochondrial (cytochrome b) and nuclear (IRBP) gene sequence data... -
Migration flyway of the Mediterranean breeding Lesser Crested Tern Thalasseus bengalensis emigratus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdulmaula Hamza --- School of Marine and Environmental Sciences, Malaysia Nicola Baccetti --- Istituto Superiore per la Protezione e la Ricerca Ambientale, Italy Joe Sultana --- BirdLife Malta, Malta Jaber Yahia --- Zoology Department, Faculty of Science, Libya Marco Zantello --- Istituto Superiore per la Protezione e la Ricerca Ambientale, Italy Adriano de Faveri --- Istituto Superiore per la Protezione e la Ricerca Ambientale, Italy Nick Cutts --- Institute of Estuarine and Coastal Studies, UK John Borg --- BirdLife Malta, Malta Hichem Azafzaf --- Regional Activity Centre for Specially Protected Areas, Tunisia Pierre Defos du Rau --- Office National de la Chasse et de la Faune Sauvage, France Esam Bourass --- Nature Conservation Department, Libya Khaled Etayeb --- Zoology Department, Faculty of Sciences, Libya Michael Elliott --- Institute of Estuarine and Coastal Studies, UKThe Lesser Crested Tern Thalasseus bengalensis emigratus breeding population in the Mediterranean is found exclusively in Libya, on the two coastal islands of Gara and Elba and one wetland on the mainland coast at Benghazi. In order to improve knowledge... -
Acoustic fish biomass assessment in a deep Tunisian reservoir: effects of season and diel rhythm on survey results
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Djemali --- Institut National des Sciences et Technologies de la Mer, Tunisia H Laouar --- Centre Technique de l’Aquaculture, TunisiaTo determine the best acoustic sampling period for obtaining fish biomass estimates of a Mediterranean deep reservoir in Tunisia, day and night surveys were performed in spring (April), summer (September), autumn (December) and winter (March). A Simrad EK60 echosounder, equipped... -
Periphytic diatom communities in tributaries around Lake Ichkeul, northern Tunisia: a preliminary assessment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Ouchir --- Department of Earth Sciences F.S.B, Tunisia S Morin --- Unité de Recherche EABX, France L Ben Aissa --- Department of Earth Sciences F.S.B, Tunisia M Boughdiri --- Department of Earth Sciences F.S.B, Tunisia A Aydi --- Department of Earth Sciences F.S.B, TunisiaAn initial inventory of diatom biodiversity at 12 sites draining into Lake Ichkeul, northern Tunisia, was performed in summer 2014, together with the characterisation of metal pollution status by analysing trace metal concentrations to determine Water Quality Indices. The maximum... -
The tardigrade fauna of Tunisia, with an integrative description of Bryodelphax maculatus sp. nov. (Heterotardigrada: Echiniscidae)
Item type: Journal Article • Journal: African Zoology • Authors: Piotr Gąsiorek --- Institute of Zoology and Biomedical Research, Jagiellonian University, Poland Daniel Stec --- Institute of Zoology and Biomedical Research, Jagiellonian University, Poland Witold Morek --- Institute of Zoology and Biomedical Research, Jagiellonian University, Poland Jamila Marnissi --- Department of Biological Sciences, Faculty of Science, Tunisia Łukasz Michalczyk --- Institute of Zoology and Biomedical Research, Jagiellonian University, PolandThe current knowledge of the diversity and distribution of tardigrade species in northern Africa is scarce and far from satisfactory. In this paper we review old and provide new faunistic records for various regions of Tunisia. Among the newly recorded... -
Significant genetic differentiation among meroplanktonic barrel jellyfish Rhizostoma pulmo (Cnidaria: Scyphozoa) in the Mediterranean Sea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AR Ben Faleh --- Marine Biology Unit, Faculty of Sciences of Tunis, Tunisia H Allaya --- Marine Biology Unit, Faculty of Sciences of Tunis, Tunisia A Armani --- FishLab, Department of Veterinary Sciences, Italy AAB Shahin --- Department of Zoology, Faculty of Science, EgyptMolecular data have shown that jellyfishes are more geographically restricted and evolutionarily divergent than previously thought. We examined genetic variation and divergence within the meroplanktonic barrel jellyfish Rhizostoma pulmo in the Mediterranean Sea; specific sampling areas were the northern Adriatic,... -
Distribution, abundance and population structure of Hexaplex trunculus and Bolinus brandaris (Gastropoda: Muricidae) in offshore areas of the Gulf of Gabès, southern Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Elhasni --- Institut National des Sciences et Technologies de la Mer, Tunisia P Vasconcelos --- Instituto Português do Mar e da Atmosfera, Portugal K Dhieb --- Institut National des Sciences et Technologies de la Mer, Tunisia H El Lakhrach --- Institut National des Sciences et Technologies de la Mer, Tunisia M Ghorbel --- Institut National des Sciences et Technologies de la Mer, Tunisia O Jarboui --- Institut National des Sciences et Technologies de la Mer, TunisiaThe banded murex Hexaplex trunculus and purple dye murex Bolinus brandaris are frequently caught as bycatch by bottom trawlers operating in the Gulf of Gabès, southern Tunisia. Although these muricid gastropods might importantly constitute an additional source of income for... -
Estimating Cape hare occupancy and abundance in southern Tunisia using spotlighting data
Item type: Journal Article • Journal: African Zoology • Authors: Chammem Mohsen --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Karssene Yamna --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Jarray Mohsen --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Khorchani Touhami --- Laboratoire d’Elevage et de la Faune Sauvage, TunisiaThis study outlines the importance of integrating spotlighting data and occupancy modelling to estimate the spatial occupancy, abundance and habitat preferences of Cape hares Lepus capensis in southern Tunisia. Exploring the spatial distribution pattern of this species is problematic because... -
On the distribution function with respect to conditional expectation on Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Research Laboratory of Algebra, Topology, Arithmetic, and Order, Department of Mathematics, Faculty of Mathematical, Physical and Natural Sciences of Tunis, Tunisia Kawtar Ramdane --- Research Laboratory of Algebra, Topology, Arithmetic, and Order, Department of Mathematics, Faculty of Mathematical, Physical and Natural Sciences of Tunis, TunisiaThe notion of distribution function with respect to a conditional expectation is defined and studied in the framework of Riesz spaces. -
The tensor product of f-algebras
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Research Laboratory of Algebra, Topology, Arithmetic, and Order, Tunisia Mohamed Amine Ben Amor --- Research Laboratory of Algebra, Topology, Arithmetic, and Order, Tunisia Jamel Jaber --- Research Laboratory of Algebra, Topology, Arithmetic, and Order, TunisiaIn this paper we prove that the Fremlin tensor product of two f-algebras can be endowed with an f-algebra structure and satisfies an appropriate universal property. In particular, the Riesz tensor product of C(X) and C(Y), where X and Y... -
Genetic variability of the Lessepsian migrant mussel Brachidontes pharaonis (Bivalvia: Mytilidae) in Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Antit --- UR11ES12 Biologie de la Reproduction et du Développement animal, Faculté des Sciences de Tunis, Tunisia N Amor --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia J Urra --- Oceanographic Center of Málaga–Spanish Institute of Oceanography, Spain AN Alagaili --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia S Farjallah --- Unité de Recherche de Biologie Intégrative et Ecologie Évolutive et Fonctionnelle des Milieux aquatiques, Faculté des Sciences Tunis, TunisiaThe present study used two mitochondrial markers (16S rRNA and COI) to assess the genetic diversity of a newly founded Lessepsian migrant mussel, Brachidontes pharaonis, in Tunisian waters. The species appears to be restricted to only one population in Rades... -
Effects of seasonal variation, group size and sex on the activity budget and diet composition of the addax antelope
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hicham Seri --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Mohsen Chammem --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Luis MM Ferreira --- CITAB-Centre for the Research and Technology of Agro-Environment and Biological Sciences, Portugal Marwa Kechnebou --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Touhami Khorchani --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Severiano R Silva --- CECAV-Animal Science Department, PortugalBehaviour and diet composition are critical elements in conservation biology within the scope of reintroduction programs. Here we focused on addax (Addax nasomaculatus), a Critically Endangered antelope species, in the Jbil National Park, Tunisia. In this study, we advanced the... -
Effects of temporal factors, nesting microhabitat and nest position on the survival of passerine nests in a Tunisian oasis habitat
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jihen Boukhriss --- Unité de recherche «Ecologie de la faune terrestre» (UR17ES44), Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaIdentifying the ecological factors shaping bird nest survival is essential for understanding bird population dynamics, as well as for conservation purposes. Using data obtained by monitoring natural bird nests in one oasis in south-eastern Tunisia, we fitted logistic exposure models... -
Spatial distribution of male display sites in a North African population of Houbara Bustard Chlamydotis undulata undulata
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohsen Chammem --- Institut des Regions Arides, Tunisia Mohsen Jarray --- Institut des Regions Arides, Tunisia Touhami Khorchani --- Institut des Regions Arides, TunisiaUnderstanding the effect of habitat characteristics on the distribution of threatened species are fundamental in conservation planning and management. Here, we explore the spatial distribution pattern of display site by the North African Houbara Bustard Chlamydotis undulata undulata males. For... -
A qualitative approach to assess innovation in small infant industries within developing countries: The case of pharmaceuticals in Tunisia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management of Mahdia, Monastir, TunisiaEmpirical methodologies to assess innovation are generally econometric models using ‘quantifiable’ variables. However, the innovation system approach shows that innovation is a social process. Its analysis needs to consider the influence of humans on the innovation system actors’ behaviours and... -
Child and adolescent mental health in Africa: A qualitative analysis of the perspectives of emerging mental health clinicians and researchers using an online platform
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Eugene Lee Davids --- Adolescent Health Research Unit, Division of Child & Adolescent Psychiatry, South Africa Leigh Adams Tucker --- Department of Psychology, South Africa Grace Nduku Wambua --- See Me, Kenya Deborah Leigh Fewster --- Occupational Therapy Department, South Africa Liezl Schlebusch --- Centre for Autism Research in Africa, Division of Child and Adolescent Psychiatry, South Africa Saira BS Karrim --- Speech-Language Therapy, South Africa Mouna Attia --- Psychiatry Department, Tunisia Joachim Nyoni --- Ministry of General Education, Zambia Fikirte Girma Bayouh --- Department of Psychiatry, Ethiopia Hillary Kuteesa --- College of Health Science, Uganda Takoua Brahim --- Psychiatry Department, Tunisia Michelle Hoogenhout --- Division of Developmental Paediatrics, South Africa Rahma Ben Moussa Kahloul --- Psychiatry Department, Tunisia Nicola Jearey-Graham --- Psychology Department, South Africa Habte Belete Gobie --- College of Medicine and Health Science, Ethiopia Joyce Sserunjogi Nalugya --- Department of Psychiatry, UgandaObjective: Using a social ecological framework, this study aimed to establish emerging mental health clinicians and researchers’ perspectives about child and adolescent mental health (CAMH) in Africa. -
Body condition of Little Egret Egretta garzetta nestlings in relation to hatching order in a southern Tunisian breeding colony
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Amel Neb --- Unité de Recherche “Ecologie de la Faune Terrestre” (UR17ES44) – Faculté des Sciences de Gabès, Tunisia Abdessalem Hammouda --- Unité de Recherche “Ecologie de la Faune Terrestre” (UR17ES44) – Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Unité de Recherche “Ecologie de la Faune Terrestre” (UR17ES44) – Faculté des Sciences de Gabès, TunisiaThe effect of asynchronous hatching on nestling health and condition in ardeids is still in need of empirical evidence from populations living in different environmental conditions. Using morphometric and hematologic data from Little Egret Egretta garzetta nestlings in a Tunisian... -
Foreign direct investment inflows, intellectual property rights and economic freedom: Empirical evidence from middle- and low-income countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Saïd Hammami --- Laboratoire d’Economie et de Gestion Industrielle LEGI, Ecole Polytechnique de Tunisie, TunisiaThis study examines the impact of intellectual property rights (IPRs) on foreign direct investment (FDI) inflows, using macro data over a panel of 39 middle- and low-income countries as classified by the World Bank. Empirical assessment was made in order... -
An annotated checklist of the leech (Annelida: Hirudinida) species of the Moulouya River basin, Morocco, with several new distribution records and a historical overview
Item type: Journal Article • Journal: African Zoology • Authors: Younes Mabrouki --- Université Mohamed Premier, Morocco Raja Ben Ahmed --- Faculté des Sciences de Tunis, LR18ES41 Ecologie, Biologie et Physiologie des organismes aquatiques, Tunisia Abdelkhaleq Fouzi Taybi --- Université Mohamed Premier, Morocco Juan Rueda --- Instituto Cavanilles de Biodiversidad y Biología Evolutiva (ICBiBE-UV), SpainA historical overview of the leech fauna of Morocco, based on both literature data, museum collections and new material, sampled in more than 100 sites in the Moulouya River basin (eastern region of Morocco), is provided. Twenty species from five... -
A note on the Littlewood conjecture in positive characteristic
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khalil Ayadi --- Sfax University, Higher Institute of Industrial Management of Sfax, TunisiaThe main purpose of this note is to construct families of pairs of formal power series over a finite field, which satisfy the appropriate analogue of Littlewood's conjecture in Diophantine approximation. On the way, the continued fraction expansion, with linear... -
Revegetation of marginal saline rangelands of southern Tunisia using pastoral halophytes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abderrazak Tlili --- , Tunisia Emna Ghanmi --- , Tunisia Naziha Ayeb --- , Tunisia Mounir Louhaichi --- , Jordan Mohamed Neffati --- , Tunisia Mohamed Tarhouni --- , TunisiaRevegetation of marginalised rangelands using pastoral halophytes is considered an appropriate scientific and environmental approach to rehabilitation. Atriplex halimus L. (Amaranthaceae), A. mollis Desf. (Amaranthaceae), Cenchrus ciliaris L. (Poaceae) and Lotus creticus L. (Fabaceae) are promising species for arid rangeland... -
A question about higher order z-ideals in commutative rings
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Benhissi --- , Tunisia A. Maatallah --- , TunisiaLet D be a principal ideal domain, p an irreducible element of D and m a nonzero positive integer. In this paper we show that the ring D/pm D answers the question asked by Dube and Ighedo in [1] concerning... -
Sibling competition in the broods of Little Egrets Egretta garzetta in a southern Tunisian breeding colony
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Amel Neb --- , Tunisia Slaheddine Selmi --- , TunisiaAsynchronous hatching is a common hatching pattern in the Little Egret Egretta garzetta, however, its role in maintaining dominance relationships and feeding hierarchy among siblings remains poorly studied. In this study, we investigated this issue using data on feeding and... -
Community diversity, functional traits and adaptation of Stipa tenacissima L. under different grazing regimes in a North African arid montane rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jamila Msadek --- , Tunisia Abderrazak Tlili --- , Tunisia Marwa Moumni --- , Tunisia Mounir Louhaichi --- , Tunisia Mohamed Tarhouni --- , TunisiaThe mountain rangeland chain of Matmata (southern Tunisia) is characterised by an arid Mediterranean climate with severe droughts and high temperatures, combined with substantial human disturbance. In order to withstand these harsh conditions, plants have developed adaptive strategies and functional... -
On the symmetric intersection of Rauzy fractals associated with the k-bonacci substitution
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hamdi Ammar --- , Tunisia Julien Cassaigne --- , France Tarek Sellami --- , Saudi ArabiaIn this article, we study the intersection of Rauzy fractals associated with the k-bonacci substitution and its reversed substitution. Applying the balanced pair algorithm to these two substitutions, we characterise all minimal balanced pairs, and we obtain a general formula... -
Mobilisation and dynamics of energy reserves in different tissues of Donax trunculus (Bivalvia: Donacidae) in the Gulf of Tunis (eastern Mediterranean Sea, Tunisia)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Boussoufa --- , Tunisia H Chalouati --- , Tunisia N Ghazali --- , Tunisia JC Navarro --- , Spain M El Cafsi --- , TunisiaSeasonal changes in condition index and the biochemical components (proteins, lipids and glycogen) of the gonad/digestive gland, foot, labial palp, mantle, gills and adductor muscles of Donax trunculus Linnaeus, 1758 from the Gulf of Tunis were monitored seasonally, from November... -
Computations and global properties for traces of Bessel’s Dirichlet form
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ali BenAmor --- , Tunisia Rafed Moussa --- , TunisiaBy an approximation method we compute explicitly traces of the Dirichlet form related to the Bessel process with respect to discrete measures as well as measures of mixed type. Then some global properties of the obtained Dirichlet forms, such as... -
Assessment of soil surface scarification and reseeding with sulla (Hedysarum coronarium L.) of degraded Mediterranean semi-arid rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Slim Slim --- , Tunisia Mounir Louhaichi --- , Tunisia Mouldi Gamoun --- , Tunisia Serkan Ates --- , United States Sawsan Hassan --- , Jordan Oumeima Ben Romdhane --- , Tunisia Azaiez Ouled Belgacem --- , United Arab EmiratesClimate change and degradation of natural resources pose daunting challenges in arid and semi-arid rangelands of southern Mediterranean region. Overcoming these challenges requires considerable management actions efforts. In this context, the current two-year (2017/2018 and 2018/2019) study investigated the effects... -
The Riesz tensor product of d-algebras
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohamed Amine Ben Amor --- , TunisiaIn this work we prove that the Riesz tensor product of two archimedean d-algebras is again a d-algebra. -
Reproductive biology of the blue swimming crab Portunus segnis (Forskål, 1775) (Brachyura: Portunidae) in the Gulf of Gabes (southeastern Tunisia, central Mediterranean Sea)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Ben Abdallah-Ben Hadj Hamida --- , Tunisia N Ben Hadj Hamida --- , Tunisia H Chaouch --- , Tunisia B Nafkha --- , Tunisia N Ben Ali --- , Tunisia D Abidi --- , Tunisia H Missaoui --- , TunisiaThe blue swimming crab Portunus segnis (Forskål, 1775) (family Portunidae) is one of the earliest Lessepsian invaders of the Mediterranean Sea and has been recorded for several decades in various Mediterranean areas. However, its presence on the southeastern Tunisian coast... -
Nest-site characteristics of Levaillant’s Woodpecker Picus vaillantii endemic to North Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mehdi Badis --- , Tunisia Nabil Hamdi --- , TunisiaLevaillant’s Woodpecker is an endemic species of the forests of north-western Africa. Through the cavities it digs, its presence is essential for the existence of other cavity nesters. However, despite its importance to its ecosystems, there are not much data... -
Assessment of long-term protection on the aboveground biomass and organic carbon content using two non-destructive techniques: case of the Sidi Toui National Park in southern Tunisia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Roukaya Chibani --- , Tunisia Abderrazak Tlili --- , Tunisia Farah Ben Salem --- , Tunisia Mounir Louhaichi --- , Tunisia Azaiez Ouled Belgacem --- , Saudi Arabia Mohamed Neffati --- , TunisiaLong-term protection of arid ecosystems changes the vegetation and soil structures. The quantification of aboveground biomass and carbon content are among the principal indicators to evaluate these changes. Most methods used to quantify these parameters are costly, time consuming and... -
Quadratic approximation for some badly rational approximable power series
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khalil Ayadi --- , Tunisia Awatef Azaza --- , Tunisia Chiheb ben Bechir --- , TunisiaWe explicitly compute the exponents of quadratic approximation of two algebraic elements over fields of power series with coefficients in a finite field. We prove that they have well quadratic approximation although their rational approximation is bad. -
Qualitative properties for the 1 − D impulsive wave equation: controllability and observability
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Akram Ben Aissa --- , Tunisia Walid Zouhair --- , MoroccoIn this paper, we establish some important results for the impulsive wave equation. We begin by proving the existence of a solution. Then, we study the impulse approximate controllability where the control function acts on a subdomain ω and at... -
A relative multifractal analysis: box-dimensions, densities, and projections
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Zied Douzi --- , Tunisia Bilel Selmi --- , TunisiaWe are interested in the behavior of relative multifractal box-dimensions, density results and multifractal dimensions under projections onto a lower-dimensional linear subspace. The results in this paper establish the connections with various multifractal and fractal dimensions and their projections, and... -
Habitat selection and foraging preference of the endangered addax (Addax nasomaculatus) in a fenced wildlife reserve within its historic range: insights for supporting effective reintroduction
Item type: Journal Article • Journal: African Zoology • Authors: Mohsen Chammem --- , Tunisia Hicham Seri --- , Tunisia Rita Bastos --- , Portugal Mário Santos --- , Portugal Joana Vicente --- , Portugal Touhami Khorchani --- , Tunisia João Alexandre Cabral --- , PortugalReintroduction of species should be based on ecological knowledge, which is fundamental to enhancing the probability of success, but also in predicting the response to future changing landscapes. The addax (Addax nasomaculatus), an endangered antelope whose ecology is mostly unknown,... -
Effect of slope aspect on vegetation characteristics in mountain rangelands of Tajikistan: considerations for future ecological management and restoration
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mounir Louhaichi --- , Tunisia Rajabov Toshpulot --- , Uzbekistan Hloniphani Peter Moyo --- , Jordan Azaiez Ouled Belgacem --- , Kingdom of Saudi ArabiaTajikistan’s rangelands are mostly mountainous and consist of summer and winter pastures. Vegetation structure and composition in these diverse landscapes are generally influenced by environmental factors. The objective of this study was to assess the effects of aspect on vegetation... -
New host–parasite associations of Cymothoidae (Crustacea, Isopoda) infesting elasmobranch fishes in Tunisian waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Youssef --- El Manar University, Tunisia B Benmansouand --- El Manar University, Tunisia Z Ramdane --- University of Bejaia, AlgeriaBetween 2015 and 2020, 2 092 specimens of cartilaginous fishes (Chondrichthyes: Elasmobranchii) belonging to eight species and five genera were sampled along the Tunisian coast and examined for their cymothoid parasites, Among the eight examined elasmobranch species, only three were... -
The value relevance of mandatory sustainability reporting assurance
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Maher Jeriji --- IHEC – University of Carthage, Tunisia Ala Nasfi --- Montpellier University, FranceSustainability reporting assurance (SRA) ensures the credibility of sustainability information disclosed by companies. This practice has continued to evolve, particularly within regulatory frameworks. The SRA is widespread among the largest French and South African companies because of the requirements of... -
Average Hewitt-Stromberg and box dimensions of typical compact metric spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bilel Selmi --- University of Monastir, TunisiaThe main aim of this paper is to study average Hewitt-Stromberg and box dimensions of typical compact metric spaces belonging to the Gromov-Hausdorff space equipped with the Gromov-Hausdorff metric. -
Embedding of a truncated vector lattice into its universal completion
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Karim Boulabiar --- Université de Tunis El Manar, Tunisia Rawaa Hajji --- Université de Tunis El Manar, TunisiaWe prove in a purely algebraic way that if L is an Archimedean truncated vector lattice then there exists a positive element e in the universal completion Lu of L such that the truncation of L is provided by meet... -
Cadmium exposure induces testicular oxidative damage and histopathological changes in the freshwater leech Limnatis nilotica (Savigny, 1822): the protective role of salicylic acid
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ichrak Khaled --- University of Gafsa, Tunisia Issam Saidi --- University of Gafsa, Tunisia Raja Ben Ahmed --- Université de Tunis El Manar, Tunisia Ramzi Amari --- University of Gafsa, Tunisia Waleed Aldahmash --- King Saud University, Saudi Arabia Octavian Pacioglu --- National Institute of Research and Development for Biological Sciences, Romania Najla Hfaiedh --- University of Gafsa, Tunisia Abdel Halim Harrath --- King Saud University, Saudi ArabiaThe present study examined the histopathological changes and some parameters of oxidative stress in the testes of the freshwater leech Limnatis nilotica, following their exposure to 50 µg l−1 of cadmium (Cd). The protective effects of salicylic acid (SA) in... -
Chernoff’s inequality in Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohamed Amine Ben Amor --- Tunis-El Manar University, Tunisia Amal Omrani --- Tunis-El Manar University, TunisiaIn this work, we will generalize the moment generating function to Riesz spaces. We will derive some of its properties and use it to prove Chernoff’s inequality inn Riesz spaces. -
Truncated vector lattices: A Maeda-Ogasawara type representation
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Karim Boulabiar --- Université de Tunis El Manar, Tunisia Rawaa Hajji --- Université de Tunis El Manar, TunisiaLet L be a truncated Archimedean vector lattice whose truncation is denoted by *. In a recent paper, we proved that there exists a locally compact Hausdorff space X such that L is a lattice isomorphic with a truncated vector... -
Generating functions in Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Tunis-El Manar University, Tunisia Youssef Nasri --- Tunis-El Manar University, TunisiaWe introduce and study the concept of generating function for natural elements in a Dedekind complete Riesz space equipped with a conditional expectation operator. This allows us to study discrete processes in a free-measure setting. In particular we improve a... -
A note on partial-A-isometries and some applications
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohamed Amine Aouichaoui --- Institute of Preparatory Studies in Engineering of Monastir Tunisia, University of Monastir, TunisiaIn this paper, the concepts of partial isometry and A-isometry are generalized. The inspiration for our investigation comes from [4, 10, 20, 27, 28, 29]. -
Periodic solution for perturbed Hamiltonian systems
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khaled Khachnaoui --- University of Kairouan, TunisiaIn this paper, we study the existence of infinitely many periodic solutions for second-order perturbed Hamiltonian systems. By using variational methods, we obtain new criteria to guarantee the existence of infinitely many periodic solutions using Bolle’s perturbation method. Our results... -
Maps preserving maximal numerical range of operator products
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: K. Dhifaoui --- University of Sfax, Tunisia M. Mabrouk --- University of Sfax, TunisiaLet be a complex Hilbert space and denote by the algebra of all linear bounded operators on . For any , denote by V 0(T) its maximal numerical range. We prove that if is a surjective map such that -
Assessment of surface water quality in a highly anthropised semi-arid catchment (Case of Wadi El Hatab Basin, Tunisia, North Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Hayouni --- University of Sfax, Tunisia N Chkir --- University of Sfax, Tunisia S Pistre --- Université Montpellier, France K Zouari --- University of Sfax, TunisiaAnthropogenic contamination of surface waters is a critical issue in urbanised catchments, especially in Mediterranean environments with scarce water resources and intermittent rivers. A combined hydro-geochemical and multivariate statistical methodology has been applied to evaluate the surface water quality of... -
Multiplicity of solutions for variable-order fractional Kirchhoff problem with singular term
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: R. Chammem --- University of Tunis el Manar, Tunisia A. Sahbani --- University of Tunis el Manar, Tunisia A. Saidani --- University of Monastir, TunisiaIn this paper, we consider a class of singular variable-order fractional Kirchhoff problem of the form: -
Conditional indicators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dorsaf Cherif --- , Tunisia Emmanuel Lepinette --- Paris Dauphine University, FranceIn this paper, we introduce a large class of (so-called) conditional indicators, on a complete probability space with respect to a sub σ-algebra. A conditional indicator is a positive mapping, which is not necessary linear, but may share common features... -
Parasitoid guild of the citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) in Tunisian citrus orchards and a new report of Cirrospilus ingenuus Gahan (Hymenoptera: Eulophidae)
Item type: Journal Article • Journal: African Zoology • Authors: Dorra Mansour --- University of Sousse, Regional Research Centre on Horticulture and Organic Agriculture at Chott Meriem, Institut Supérieur Agronomique de Chott-Mariem, Tunisia Mohamed Braham --- University of Sousse, Regional Research Centre on Horticulture and Organic Agriculture at Chott Meriem, Institut Supérieur Agronomique de Chott-Mariem, TunisiaA survey of the parasitoid species of the citrus leafminer (CLM), Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae), a cosmopolitan pest of citrus, was carried out in 2019 and 2020 in the major citrus production area of Tunisia. Four different Eulophidae species... -
Opportunities and barriers for the integration of Industry 4.0 into small and medium-sized enterprises in Tunisia: analysis with MICMAC and DEMATEL
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdessalem Jerbi --- Université de Sfax, Tunisia Manel Elmsalmi --- Université de Sfax, TunisiaThis study presents a comprehensive framework for understanding the key opportunities and barriers in implementing Industry 4.0 (I4.0) in Tunisian medium-sized enterprises (SMEs), using MICMAC (Matrice d’Impacts Croisés, Multiplication Appliquée à un Classement) and DEMATEL (Decision-Making Trial and Evaluation Laboratory)... -
Some characterizations of ergodicity in Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Tunis-El Manar University, Tunisia Marwa Masmoudi --- Tunis-El Manar University, TunisiaIn the recent surge of papers on ergodic theory within Riesz spaces, this article contributes by introducing enhanced characterizations of ergodicity. Our work extends and strengthens prior results of both the authors and Homann, Kuo, and Watson. Specifically, we show... -
Measure pseudo
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An empirical investigation of return spillover and volatility dynamics of Indian sectoral indices
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Barkha Dhingra --- Maharshi Dayanand University, India Mohit Saini --- Maharshi Dayanand University, India Mohamed Fakhfekh --- Higher Institute of Business and Administration of Sfax, Tunisia Mahender Yadav --- Maharshi Dayanand University, IndiaThis research delves into the interconnectedness and volatility dynamics within sectoral indices amid the COVID-19 pandemic, to determine the most appropriate model for elucidating these dynamics. It addresses the burgeoning interest among investors in comprehending sectoral dynamics within India’s stock... -
Patent-paper citations: A window into the technological impact of Tunisian research
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ridha Mhamdi --- Centre of Biotechnology of Borj-Cedria, TunisiaThis study constitutes the first report evaluating research performance at a national level by analyzing literature references cited in patents. The objective is to quantify the technological impact of the Tunisian research through patent-paper citations. Using the SciVal research analytics... -
New properties of some classes of Saphar type operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ayoub Ghorbel --- University of Sfax, Tunisia Snežana Č. Živković-Zlatanović --- University of Niš, SerbiaThis paper explores additional properties of some classes of Saphar type operators, namely left Drazin invertible, essentially left Drazin invertible, right Drazin invertible, and essentially right Drazin invertible operators on Banach spaces, building upon the groundwork laid in [8] and... -
Three decades of research on olive mill waste: A patent citation analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ridha Mhamdi --- Centre of Biotechnology of Borj-Cedria, TunisiaThis paper investigates the technological impact of research on olive mill wastes (OMW) by analyzing patent citations. Using a dataset of 2448 publications from Scopus, we identified 151 papers cited by patents. The results show a moderate correlation between academic... -
Further remarks on z-ideals of semirings
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Amartya Goswami --- University of Johannesburg, South Africa Ahmed Maatallah --- University of Monastir, Faculty of Sciences of Monastir, Research Laboratory on Algebra, TunisiaIn this note, we revisit certain results from a previous work of the first author concerning z-ideals of semirings. We demonstrate that the assumption of the semiring being a bzi-semiring can be dispensed with. Additionally, we propose a revised definition... -
Spring migration phenology of trans-Saharan migratory birds at a southern Tunisian oasis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Fatma Belani --- University of Gabès, Tunisia José Javier Cuervo --- National Museum of Natural Sciences, Spain Marina García-del Río --- National Museum of Natural Sciences, Spain Abdessalem Hammouda --- University of Gabès, Tunisia Ivan Maggini --- Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Austria Slaheddine Selmi --- University of Gabès, TunisiaNorth African date palm oases are regarded as important stopover sites for trans-Saharan migratory birds after their Sahara crossing during spring migration. However, little is known about the timing of migration through these areas. In this study, we investigated the... -
Geometric characterizations of some analytic functions related to the generalized Marcum Q-function
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Abdulaziz Alenazi --- College of Science, Northern Border University, Saudi Arabia Khaled Mehrez --- Kairouan Preparatory Institute for Engineering Studies, University of Kairouan, TunisiaThe aim of this paper is to study certain geometric properties, such as convexity of order α (0 ≤ α < 1) and uniform convexity inside the unit disk, for a class of analytic functions related to the generalized Marcum... -
Management entrenchment: Determinants and impact on firm performance of French listed companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Mounir Jaouadi --- Arab Open University, Kingdom of Saudi Arabia Amira Feidi --- University of Tunis El-Manar, Tunisia -
Effects of nonlocal source terms on Kirchhoff-type double phase equations with variable exponents: Existence of three distinct solutions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khaled Kefi --- Center for Scientific Research and Entrepreneurship, Northern Border University, Saudi Arabia Haikel Ouerghi --- Department of Quantitative Methods, Jendouba University, Research Laboratory of Mathematics and Applications, Tunisia Khaled Benali --- Department of Mathematics, Faculty of Sciences of Gabes, Research Laboratory of Mathematics and Applications, Tunisia Nguyen Thanh Chung --- Faculty of Mathematics and Information Technology, The University of Danang - University of Science and Education, VietnamThis paper investigates a class of Kirchhoff-type double phase problems distinguished by the inclusion of two nonlocal source terms and formulated in the framework of variable exponent Sobolev spaces. By applying a variant of Bonanno’s critical point theorem [12], we...