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Floristiese verskille tussen ekotope in die Potchefstroom distrik1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: AnnelieS. de Beer --- Departement Landbou en Watervoorsiening, Republiek van Suid‐Afrika G.K. Theron --- Departement Plantkunde, Republiek van Suid‐Afrika G.J. Bredenkamp --- Departement Plantkunde, Republiek van Suid‐AfrikaFloristic differences between eeotopes in the Potchefstroom area. Eeotopes are generally used, in the Highveld Region, as a basis for the division of camps when planning a farm. The possible floristic differences which support this ecological approach, as well as... -
Reciprocal differences in intraspecies crosses of tobacco (Nicotiana tabacum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. van Heerden --- , Republic of South Africa M.P. Lamprecht --- , Republic of South Africa H. van Ark --- , Republic of South AfricaReciprocal differences in a diallel cross experiment with air-cured tobacco strains were found to be significant for certain characteristics, but relatively small compared to differences between strains in general combining ability. A factorial analysis designed to detect maternal effects in... -
Grondgeassosieerde, lineêre plantegroeipatrone in die Warmbadomgewing van die Limpopo-provinsie van Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Dinkelmann --- Departement Geografie en Omgewingstudies, E. Verster --- Departement Geografie en Omgewingstudies, T.H. van Rooyen --- Departement Geografie en Omgewingstudies,Lineêre mikroreliëfverskynsels wat op lugfoto's soos vingerafdrukpatrone vertoon en bestaande uit boomryke kruine en grasryke trôe is op die voethang van die Baviaansberg, Warmbadomgewing (Suid-Afrika) beskryf. Vir die doel om die oorsprong van die verskynsels te verklaar is van 'n... -
Effect of bearing position on fruit quality of mandarin types
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.S. Verreynne --- Department of Horticultural Science, South Africa E. Rabe --- Department of Horticultural Science, South Africa K.I. Theron --- Department of Horticultural Science, South AfricaDifferences in juice quality are associated with positional differences in canopy microclimate and exposure of individual fruit to light and temperature. Differences of internal fruit quality between fruit from different sectors of the tree were investigated. The trials were carried... -
Modelling the contribution of root accessible water tables towards crop water requirements
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Earth Sciences, Republic of South Africa L. Ehlers --- Department of Soil, Republic of South Africa A. T.P. Bennie --- Department of Soil, Republic of South Africa C.C. Du Preez --- Department of Soil, Republic of South Africa J.G. Annandale --- Department Plant Production and Soil Science, Republic of South AfricaProper utilization of shallow water tables could substantially reduce irrigation water requirements in large agricultural areas. The objective was to develop and test a computer model for predicting the contribution of shallow water tables to root water uptake. The model... -
Temperament Styles of Nigerian and U.S. Children
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Thomas Oakland --- University of Florida, Andrew Mogaji --- University of Lagos, Jack Dempsey --- University of Florida,Temperament styles of 400 Nigerian children are described in reference to possible gender and age differences and compared with those of 3200 U.S. children in light of Jung's theory of temperament as modified by Myers and Briggs, one that highlights... -
Estimating One's Own and Others' Multiple Intelligence: A Cross-Cultural Study from Guinea Bissau and Portugal
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Félix Neto --- Universidade do Porto, Portugal Adrian Furnham --- Department of Psychology, UK Maria da Conceição Pinto --- Universidade do Porto, PortugalThis study examined the estimations of multiple intelligences for self, partner and parents. One hundred and fifty two students (males = 81, females = 68, and 3 have not indicated their sex; mean age = 24.02, SD = 3.08) from... -
Gender Differences in PTSD diagnostic Criteria and Suicidal Ideation in a South African Police Sample
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Renier Steyn --- University of South Africa,The study examined gender effects on PTSD symptoms to predict of suicidal ideation in a sample of South African police. A male (N = 161) and a female group (N = 56) of South African police officers were assessed by... -
Padé Approximations to the Logarithm I: Derivation Via Differential Equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: J.A.C. WeidemanExplicit formulas for the polynomials that define Hermite-Padé approximations to the logarithm are derived. The main elements of the derivation are Frobenius' method for solving linear differential equations, and automatic summation algorithms. Applications to finite difference formulas and Laplace transforms... -
Quadratic Pencil of Difference Equations: Jost Solutions, Spectrum, and Principal Vectors
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Murat Adıvar --- Department of Mathematics, TurkeyIn this paper, a quadratic pencil of Schrodinger type difference operator Lλ is taken under investigation to provide a general perspective for the spectral analysis of non-selfadjoint difference equations of second order. Introducing Jost-type solutions, structure and quantitative properties of... -
Morphological and electrophysiological field observations on electric freshwater fish of the genus Mormyrops Müller 1843 (Teleostei: Mormyridae) from West and southern Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Kramer --- Zoological Institute of the University of Regensburg, GermanyDifferent specimens of Mormyrops anguilloides (Linnaeus 1758) were reported to display electric organ discharge (EOD) pulses of either initially head-positive or initially negative polarity, a hypothetical sex difference that has not been substantiated to date. The morphology and EODs of... -
Dynamic base-age invariant site index models for Tectona grandis in peninsular India
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Vindhya P Tewari --- Institute of Wood Science and Technology, India Juan G Álvarez-González --- Unidad de Gestión Forestal Sostenible, Departamento de Ingeniería Agroforestal, Spain Klaus von Gadow --- Burckhardt Institute, GermanyData from 27 remeasured sample plots were used to evaluate dynamic base-age invariant site index models for teak (Tectona grandis) forests in Karnataka, India. The data were obtained in observational field studies covering a wide range of sites in Karnataka... -
A preliminary study of allozyme differences amongst Carcharhinus sharks from the continental slope near Abidjan, Côte d'lvoire
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Béatrice Adepo-Gourène Lounès Chikhi Jean-François Agnèse Germain Gourène Alain HervéGenetic variability of fifty-five shark specimens from the genus Carcharhinus was analysed using 18 allozyme loci. Sixteen loci were polymorphic either within, or between, species. Levels of genetic polymorphism, as measured by observed heterozygosity values, ranged from 0.008 (±0.008) to... -
The views of Medical Students on professionalism in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: M Van Rooyen --- Department of Family Medicine,An article on medical professionalism was published in the Annals of Internal Medicine in February 2002 outlining a charter, and the fifth-year medical students of the Medical School of the University of Pretoria were asked to comment on the charter... -
Ego-identity formation in Black South African young adults
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Malose S. Makhubela --- Department of Psychology, South AfricaThe study examined aspects of ego-identity development among black African students (N = 104; males = 42%; females = 58%; mean age = 18.7 yr.; SD = 0.9). They completed an ego-identity development measure. Data was analysed descriptively and also... -
Picking a tree: habitat use by the tree agama, Acanthocercus atricollis atricollis, in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Leeann T. Reaney --- Communication and Behaviour Research Group, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Martin J. Whiting --- Communication and Behaviour Research Group, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaWe studied tree agama (Acanthocercus a. atricollis) habitat use in the Magaliesberg mountain range in northern South Africa using sightings of marked individuals, and in a few cases, radio-telemetry. Acanthocercus a. atricollis preferentially selected thorn trees (46%; Acacia karroo), followed... -
Interspecific variation in the distribution of ungulates relative to human infrastructure surrounding Amboseli National Park
Item type: Journal Article • Journal: African Zoology • Authors: Marian Howe --- Department of Biology, Vassar College, U.S.A. Moses M. Okello --- The School for Field Studies, Center for Wildlife Management Studies, Kenya Jeremy M. Davis --- Department of Biology, Vassar College, U.S.A.The presence of humans and man-made structures may cause increased wariness in wildlife, causing displacement from traditional habitat ranges. Potential species differences in such responses could affect the composition of wildlife communities around human settlements. We examined the position of... -
Seasonal differences in foraging dynamics, habitat use and home range size of Wahlberg’s epauletted fruit bat in an urban environment
Item type: Journal Article • Journal: African Zoology • Authors: Dominic P. Rollinson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Joy C. Coleman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaUrbanization through the process of habitat loss and fragmentation affects ecosystems. Many species are no longer able to survive in these urban areas; however, there are some that have been able to persist and even thrive in these habitats. One... -
Solitary individuals in populations of the group-living lizard Ouroborus cataphractus: voluntary or forced?
Item type: Journal Article • Journal: African Zoology • Authors: P. le Fras N. Mouton --- Department of Botany & Zoology, South Africa Janine L. Glover --- Department of Botany & Zoology, South Africa Alexander F. Flemming --- Department of Botany & Zoology, South AfricaWe compared crevice fidelity among solitary and group-living individuals in a population of the group-living lizard Ouroborus cataphractus. We also compared the incidence of solitary individuals between the sexes and different seasons.We surveyed suitable rocky areas at two sites in... -
The effect on taxpayers of new tax legislation regarding foreign exchange transactions
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Oberholzer --- Department of Taxation, J S Wilcocks --- School of Applied Accountancy,Numerous problems have been encountered with the practical application of the new taxation legislation relating to foreign currency transactions. The purpose of this paper is to analyse the amendments relating to foreign exchange transactions and to illustrate, by using examples,... -
Minimum detectable differences for cane yield, sucrose content and sugar yield among the Midlands and Coastal Short Cycle sugarcane breeding programmes in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvellous Zhou --- South African Sugarcane Research Institute, Mt Edgecombe, South Africa; and Department of Plant Breeding, University of the Free State, South AfricaMinimum detectable differences (MDD) are the smallest difference between two genotypes that can be determined accurately at a given statistical significance threshold. The effect of genotype by environment interaction reduces accuracy of determining genetic values, increases MDD and reduces selection... -
Anthropologist to activist: Paul Farmer's changing perspectives on cultural difference and human rights
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hanne Jensen Haricharan --- Department of Social Anthropology,This paper outlines shifting perspectives in Paul Farmer's work with regard to cultural difference and human rights. It describes Farmer's critique of medical anthropology's focus on culture to the detriment of economic factors, and his critique of cultural relativism being... -
Introduction to Anthropology Southern Africa special issue on ‘Engaging Difference: Perspectives on belonging and exclusion in contemporary southern and East Africa’
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Heike Becker --- Department of Anthropology and Sociology,This special issue of Anthropology Southern Africa is the result of troubling questions of how to engage difference and belonging. Anthropologists in South Africa, like their colleagues elsewhere, today face the return of difference thinking. The articles in this special... -
Modelling dominant height growth in plantations of Pseudotsuga menziesii (Mirb.) Franco in Spain
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos A López-Sánchez --- Instituto de Silvicultura e Industria de la Madera, México Juan G Álvarez-González --- Departamento de Ingeniería Agroforestal, Escuela Politécnica Superior, Spain Ulises Diéguez-Aranda --- Departamento de Ingeniería Agroforestal, Escuela Politécnica Superior, Spain Roque Rodríguez-Soalleiro --- Departamento de Producción Vegetal, Escuela Politécnica Superior, SpainA model for predicting dominant height growth and site index of Pseudotsuga menziesii (Mirb.) Franco in Spain was constructed. Data from stem analysis of 117 site trees were used. Four dynamic equations using the algebraic difference approach (ADA) and its... -
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... -
The Internationalization of African Firms: Effects of Cultural Differences on the Management of Subsidiaries
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Franca Ovadje --- Lagos Business School, Pan Atlantic University, NigeriaThe recent rise in internationalization of African firms has given rise to an interest in studies on internationalization in Africa. This study examines the motives for internationalization of these firms and the role subsidiaries play in the parent company. It... -
Factorial invariance and latent mean differences of the Beck Depression Inventory – second edition (BDI-II) across gender in South African university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Malose Makhubela --- Department of Psychology, Legesse Kassa Debusho --- Department of Statistics,This study examined the measurement invariance of scores from the BDI-II as well as the differences in latent mean scores by gender. Participants were 919 South African university students (females = 72%). They completed the BDI-II, which is a measure... -
Sexual dimorphism in morphological traits and scaling relationships in two populations of Gallotia stehlini (Fam. Lacertidae: Squamata) from Gran Canaria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Cristina Rivero Suárez --- , , Spain Miguel Angel Rodríguez-Domínguez --- , Miguel Molina-Borja --- , , SpainLizards of the genus Gallotia, endemic to the Canary Islands, show morphological and colouration varieties that are related to within island variation in orographic and climatic characteristics. This study examines sexual size dimorphism (SSD) within and between population variation in... -
The global innovation networks and global production networks of firms: Conceptualization and implication
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ju Liu --- Department of Urban Studies, SwedenToday’s developments in the literature about the global networks of firms emphasize not only global production networks (GPNs) but also global innovation networks (GINs). However, the differences, commonalities and interaction between firms’ GINs and GPNs have not been theoretically and... -
Love in cross-cultural perspective: Mozambique-France comparison
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Germano Vera Cruz --- University of Toulouse Jean Jaurès, FranceThe study aimed to characterise the conceptualisation of love in Mozambique (a collectivist society) and France (an individualistic society) on three attributes: passion, intimacy, and commitment. The study sample comprised 310 Mozambican adults (females = 57%; age range = 18-64)... -
Use of otolith-shape analysis for stock discrimination of Boops boops along the Algerian coast (southwestern Mediterranean Sea)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Ider --- Laboratoire de Zoologie Appliquée et d’Ecophysiologie Animale, Faculté des Sciences de la Nature et de la Vie, Algeria Z Ramdane --- Laboratoire de Zoologie Appliquée et d’Ecophysiologie Animale, Faculté des Sciences de la Nature et de la Vie, Algeria K Mahé --- Laboratoire Ressources Halieutiques de Boulogne, France JL Duffour --- Laboratoire Ressources Halieutiques de Boulogne, France M Bacha --- Laboratoire d’Océanologie et de Géosciences – Centre National de la Recherche Scientifique (CNRS), France R Amara --- Laboratoire d’Océanologie et de Géosciences – Centre National de la Recherche Scientifique (CNRS), FranceOtolith-shape analysis was examined to determine its utility for biological stock identification of the bogue Boops boops along the Algerian coast of the Mediterranean Sea. The outlines of 179 sagittal otolith pairs from fish collected at three locations (Oran, Bejaia... -
Retrospective clinical analysis of adverse drug reactions associated with antiretroviral therapy in Tlokwe district, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Rentia van Graan --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Michelle Viljoen --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Malie Rheeders --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Fadeela Motara --- Potchefstroom Hospital, Pharmacy, South AfricaBackground: South Africa has the highest number of patients on antiretroviral therapy (ART) globally. Various obstacles were identified that influence effective reporting of adverse drug reactions (ADRs) in resource-limited countries. This investigation aimed to identify, classify and analyse the prevalence... -
Maize responses to reduced tillage, different plant residue mulch and nitrogen fertiliser on granitic sandy soils of Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Walter Mupangwa --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Isaiah Nyagumbo --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Eleanor Mutsamba --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Blessing Mhlanga --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Jefias Mataruse --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, ZimbabweMulching in smallholder conservation agriculture (CA) systems is constrained by lack of adequate crop residues. A three-year study assessed the effects of reduced tillage systems combined with different plant residue mulch and nitrogen (N) fertiliser on nitrogen uptake using the... -
Undermining gender: women mineworkers at the rock face in a Zambian underground mine
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: James Musonda --- , BelgiumThis article examines how women’s increased employment in the stereotypically masculine domain of large-scale underground mining affect gender stereotypes and cultural expectations in the Zambian Copperbelt. Based on three years of ethnographic research under and above the ground, it responds... -
Tracking error vs tracking difference: Does it matter?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ailie Charteris --- , South Africa Kerry McCullough --- , South AfricaFund fact sheets are intended to provide investors with information necessary to make investment decisions. For passive funds, the inclusion of cumulative returns for the fund and benchmark enable investors to measure the fund’s tracking performance using tracking difference. However,... -
Sexual harassment as perceived and experienced by male and female restaurant employees
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Andreea-Stefania Baltag --- , the Netherlands Melanie Bosman --- , the Netherlands Andrea Bravo Wilson --- , the Netherlands Joanne Huismans --- , the Netherlands Wichard Zwaal --- , the NetherlandsThe purpose of this study was to gain knowledge about sexual harassment as perceived and experienced by male and female restaurant employees. The research was carried out by using an online survey and five interviews. The 137 participants of the... -
Examining leadership preferences of working adults in Ghana, Kenya, and Zambia
Item type: Journal Article • Journal: Africa Journal of Management • Authors: W. Randy Evans --- , USA Romie Frederick Littrell --- , Russian Federation Nai H. Lamb --- , USA Bradley Kirkman --- , USADo traditional, gender-based expectations and widely disseminated notions of African culture apply to preferred leadership behaviors in African nations? This study examines leadership preferences of working adults in Ghana, Kenya, and Zambia using the Leader behavior Description Questionnaire-XII (LBDQXII), a... -
The effect of adjacent vegetation on fire severity in Afrotemperate forest along the southern Cape coast of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Brandon Giddey --- , South Africa Johan A Baard --- , South Africa Lufuno Vhengani --- , South Africa Tineke Kraaij --- , South AfricaRecently two large wildfires (around the towns of Knysna in 2017 and George in 2018) jointly burnt over 80 000 ha in the southern Cape, South Africa. Here, patches of closed-canopy Afrotemperate forest occur within a matrix of fire-prone (native)... -
Thermal physiology of Tropical House Geckos (Hemidactylus mabouia) in a cool temperate region of South Africa.
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: S Welman --- Nelson Mandela University, South Africa I Ibarzabal --- Nelson Mandela University, South AfricaTemperature profoundly influences the functioning of ectotherms and understanding the thermal biology of invasive species affords valuable insights regarding the suitability of different habitats. Yet, this remains an understudied aspect in the field of invasion biology. Here, we investigated the... -
Analysis of intraspecific colour variation in the fossorial Coastal Legless Lizard, Microacontias litoralis (Scincidae: Acontiinae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: PhomoloL. Mashinini --- Transvaal Museum, South Africa Neil.J. L. Heideman --- University of the Free State, South Africa P. le FrasN. Mouton --- Stellenbosch University, South AfricaAn analysis of intraspecific variation in the fossorial skink Microacontias litoralis revealed that orange‐coloured and melanistic individuals co‐occur at several localities. Body colour was found to be independent of sex and body size. Both orange‐coloured and melanistic in situ embryos... -
An investigation into the normal tax implications of fractional share rights in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Christoff Botha --- Stellenbosch University, South Africa Cecileen Greeff --- Stellenbosch University, South AfricaA recent development in the financial service industry is the introduction of the fractional share right that allows a retail investor to invest in a fraction of a listed equity share. Fractional share right is not defined in the Income... -
Validation of Learning Transfer Inventory System (LTIS) in Cameroon teachers: Measurement invariance and latent mean difference across sex
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bekolo Ngo’a Celestin --- Yibin University, China Tchouchu Emmanuel --- University of Cape Coast, Ghana Kouame Dangui Dorcas --- School of Management and Economics (SME) University of Electronic Science and Technology-Chengdu, ChinaThis study investigated the psychometric properties of the Learning Transfer Inventory System (LTIS) in the Cameroonian education system. A sample of 700 in-service teachers (female = 54.8%; mean age = 36 years, SD = 15.41 years) who completed leadership, management,... -
Defender self-efficacy and defender behaviour in school bullying of primary school pupils: The role of perceived responsibility and sex
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yuping Wu --- Lishui University, China Leishan Shi --- Lishui University, China Yanfang Zhou --- Lishui University, China Qi Zhang --- Lishui University, ChinaThis study examined the relationship between bullying defender self-efficacy and bullying defender behaviour in primary school pupils and the role perceived responsibility and sex played in this relationship. Participants included 1 310 pupils from Chinese primary schools attending Grades 4... -
Dissipation of environmental DDT and its metabolites in selected rivers of south-western Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JK Nyaundi --- Kenya Marine and Fisheries Research Institute, Kenya SK Omasaki --- Kisii University, Kenya JM Babu --- Kenya Marine and Fisheries Research Institute, Kenya NM Mwirigi --- Kenya Marine and Fisheries Research Institute, Kenya R Omondi --- Kisii University, Kenya GA Mwayulj --- Great Lakes University of Kisumu, Kenya S Bassa --- National Fisheries Resources Research Institute (NaFIRRI), UgandaRivers are the main source of domestic and industrial water supplies in Kenya. In this study, water sampling was done at eight upstream sites in the Kuja River catchment, Kenya, between October 2016 and April 2017, specifically to test for... -
Prevalence and psychological correlates of anxiety symptoms in subthreshold depressive adolescents with a high level of rumination response style
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xingzhi Mao --- Capital Normal University, China Qi Li --- Capital Normal University, China Fangfang Shangguan --- Capital Normal University, China Jing Xiao --- Capital Normal University, ChinaThis study examined between anxiety symptoms in subthreshold depressive (SD) adolescents with rumination and their personal predispositions. A total of 371 SD adolescents were enrolled in the study (females 55.26%, mean age = 16.34, SD = 0.96). The adolescents completed... -
Wing-moult and seasonal occurrence of sunbirds (Nectariniidae) captured at four sites in the Eastern Cape, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Bo T Bonnevie --- Rhodes University, South Africa Adrian JFK Craig --- Rhodes University, South Africa Pat E Hulley --- Rhodes University, South Africa Albert Schultz --- , South Africa Anthony J Tree --- Rhodes University, South AfricaRinging activity in the Eastern Cape province, South Africa, spanned 30 years, with three sites active concurrently over a 14-year period, and three sites over a 6-year period. In total, in the course of 714 ringing days, in all months,... -
Form of the solutions of difference equations via Lie symmetry analysis and Fibonacci numbers
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Melih Göcen --- Zonguldak Bülent, Ecevit University, Turkey Mensah Folly-Gbetoula --- University of the Witwatersrand,In this paper, we give the form of the solutions of the following rational difference equation -
Gender differences in the pathway of childhood trauma, impulsivity and adult eating behaviour: a cross-sectional study
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Antônio Bonfada Collares Machado --- Institute of Psychology, Federal University of Rio Grande do Sul, Brazil Katia Irie Teruya --- Institute of Psychology, Federal University of Rio Grande do Sul, Brazil Rogério Friedman --- Universidade Federal do Rio Grande do Sul, Brazil Gibson Juliano Weydmann --- Institute of Psychology, Federal University of Rio Grande do Sul, Brazil Eduardo Remor --- Institute of Psychology, Federal University of Rio Grande do Sul, Brazil Lisiane Bizarro --- Institute of Psychology, Federal University of Rio Grande do Sul, BrazilObjective: The current cross-sectional study aimed to examine the association between childhood trauma, impulsivity, binge eating symptoms, and body mass index (BMI) in a sample of males and females. We also aimed to investigate the indirect association of childhood trauma... -
A fully discrete scheme on piecewise-equidistant mesh for singularly perturbed delay integro-differential equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Musa Cakir --- Van Yuzuncu Yil University, Turkey Baransel Gunes --- Van Yuzuncu Yil University, TurkeyThis paper chiefly takes into account the singularly perturbed delay Volterra-Fredholm integro-differential equations by numerically. In this context, firstly, priori estimates are given and a new discretization is constructed on piecewise-equidistant mesh by using interpolating quadrature rules [2] and composite... -
Family quality of life of Ghanaian families raising people with intellectual disability
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Daniel Miezah --- University of Cape Coast, Ghana Emmanuel Eshun --- University of Cape Coast, Ghana Kenneth Owusu Ansah --- , GhanaThis study examined the family quality of life (FQOL) of people with intellectual disabilities (PWID). Participants were 176 Ghanaian parents of PWID (mothers = 71.6%). The mean age of the parents was 41.64 years (SD = 9.21 years). The parents... -
Impacts of analyst coverage initiation on market quality
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Yongsik Kim --- Hankuk University of Foreign Studies, Korea Doojin Ryu --- Sungkyunkwan University, KoreaWe examine whether the initiation of financial analysts’ coverage leads to improved stock-price informativeness and increased market liquidity using the difference-in-differences methodology. The average value of daily total trading volume is significantly higher after than before initiation. The increase in... -
Taylor theory in quantum calculus: a general approach
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Enas M. Shehata --- Menoufia University, Egypt Rasha M. El Zafarani --- Ain Shams University, EgyptLet the function β be strictly increasing and continuous on an interval I ⊂ ℝ. The β-difference operator is defined by Dβ f (t) = (f(β(t)) − f(t)/(β(t) – t), where t ≠ β(t), and Dβ f (t) = f′... -
Abstract degenerate difference equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Marko Kostić --- University of Novi Sad, SerbiaIn this paper, we consider some classes of the abstract degenerate difference equations with integer-order derivatives. We also investigate the existence and uniqueness of almost periodic type solutions to the abstract degenerate difference equations. -
Some scattering and spectral properties of eigenparameter dependent quantum difference equations with matrix value impulsive conditions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Güher Gülçehre Özbey --- Middle East Technical University, Üniversiteler Mahallesi, Turkey Yelda Aygar --- Ankara University, TurkeyIn this study, we present a problem which consists quantum difference equation with matrix value impulsive conditions and eigenparameter dependent boundary condition. Our examination is based on the concept of main spectral and scattering properties of this problem. We introduce...