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Comparative investigation of physiological responses of field-grown alfalfa and tall fescue to cutting under different water regimes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Lazaridou --- Department of Forestry, Greece P Kostopoulou --- School of Forestry and Natural Environment, Greece M Karatassiou --- School of Forestry and Natural Environment, Greece G Merkouropoulos --- Centre for Research and Technology Hellas, GreeceAn important consideration in designing and managing forage systems is the knowledge of the physiological response mechanisms to cutting, especially when water deficit conditions are prevailing. The objective of this study was to determine the physiological response of Medicago sativa... -
On Russell and Anti Russell-Cardinals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich --- , Germany Kyriakos Keremedis --- Department of Mathematics, Greece Eleftherios Tachtsis --- Department of Statistics and Actuarial-Financial Mathematics, GreeceIn the absence of the Axiom of Choice we study countable families of 2-element sets with no choice functions which either have infinite subfamilies with a choice function or no infinite subfamilies with a choice function. -
THE INDUCED H-STRUCTURE ON FUNCTION SPACES
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: BasilK. Papadopoulos --- Department of Mathematics, GreeceLet (Z,Γ) be an H-structure. Then, for each exponential object Y in TOP, an H-structure is induced on the topological space Ct(Y,Z) of continuous maps equipped with the appropriate function space topology t (e.g. t = Tis, where Tis is... -
COMPLETENESS IN LINEAR FUZZY NEIGHBORHOOD SPACES
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.K. Katsaras --- Department of Mathematics, GreeceSome of the problems related to the completeness in linear fuzzy neighborhood spaces are investigated. It is shown that if (E, N) is a linear fuzzy neighborhood space, then the space É = M(E) of all minimal hyper-Cauchy prefilters on... -
ON THE ASYMPTOTIC BEHAVIOUR OF THE DIGITS OF CONTINUED FRACTIONS WITH ODD PARTIAL QUOTIENTS
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: C. Ganatsiou --- Department of Mathematics, Faculty of Sciences, GreeceThe asymptotic behaviour of the digits an and en of continued fractions with odd partial quotients is investigated in the context of dependence with complete connections. In particular, we obtain a formula for the geometric mean of partial denominators and... -
NON-ARCHIMEDEAN KÖTHE SPACES
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.K. Katsaras --- Department of Mathematics, GreeceKöthe type non-Archimedean spaces are introduced in this paper. Bounded sets, compactoid sets, dual spaces, nuclearity, reflexivity and other properties of such spaces are investigated. -
ON LOCALLY COUNTABLY S-CLOSED AND LOCALLY RC-LINDELÖF SPACES
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Julian Dontchev --- Department of Mathematics, Finland Maximilian Ganster --- Department of Mathematics, Austria Chariklia Konstadilaki --- Department of Mathematics, Faculty of Sciences, GreeceThe aim of this paper is to continue the study of some topological properties weaker than S-closed, this time via a local point of view. We show that every focally countably S-closed km-perfect space is extremally disconnected as well as... -
BASES FOR CONES AND REFLEXIVITY
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ioannis Polyrakis --- Department of Mathematics, National Technical University of Athens, Zographou, Athens, Greece,It is proved that a Banach space E is non-reflexive if and only if E has a closed cone with an unbounded, closed, dentable base. If E is a Banach lattice, the same characterization holds with the extra assumption that... -
KNOPFMACHER EXPANSIONS IN NUMBER THEORY
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S. Kalpazidou --- Department of Mathematics, Greece C. Ganatsiou --- , GreeceDedicated to the memory of John Knopfmacher (1937–1999) -
The cardinal inequality α2 < 2α
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich --- , Germany Paul Howard --- Department of Mathematics, USA Eleftherios Tachtsis --- Department of Statistics and Actuarial-Financial Mathematics, GreeceIn ZFC set theory (i.e., Zermelo-Fraenkel set theory with the Axiom of Choice (AC)) any two cardinal numbers are comparable. However, this may not be valid in ZF (i.e., Zermelo-Fraenkel set theory modulo AC). In this paper, we study the... -
Feeding and ecomorphology of seven flatfish species in the North-North-West Aegean Sea, Greece
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PK Karachle --- Laboratory of Ichthyology, Department of Zoology, Greece KI StergiouThe diet composition and possible relationships between mouth area and intestine length with feeding were investigated for seven flatfish species in the North-North-West Aegean Sea. Samples were obtained from commercial fisheries (trawls and gillnets) on a seasonal basis, and a... -
How a dependent variable's non-randomness affects taper equation fitting
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Kitikidou Kyriaki --- Demokritian University of Thrace, Greece (Department of Forestry and Management of Environment and Natural Resources, Laboratory of Forest Biometry), GreeceIn order to apply the least squares method in regression analysis, the values of the dependent variable Y should be random. In an example of regression analysis linear and nonlinear taper equations, which estimate the diameter of the tree dh... -
The Mediterranean diet: a short review of the health benefits
Item type: Journal Article • Journal: South African Family Practice • Authors: A Revelas --- St Nicholas General Hospital, Greece D Arvanitakis --- Venizelio General Hospital, GreeceThere is an urgent need to preserve the traditional diet in the Mediterranean countries and to stress its important contribution to the public health. The traditional Mediterranean diet can be revitalised within a modern environment and lifestyle and be adopted... -
Defining hypertension in children
Item type: Journal Article • Journal: South African Family Practice • Authors: A Revelas --- Pathological Department, Greece O Tahmazidis --- Vardakeio Hospital, GreeceHypertension is the most common, and potent universal contributor to cardiovascular mortality. Elevated blood pressure, labile or fixed, systolic or diastolic, at any age, in either sex, is a contributor to all forms of cardiovascular disease. Hypertension in children is... -
Melanoma continues to rise throughout the world
Item type: Journal Article • Journal: South African Family Practice • Authors: A Revelas --- Department of Pathology, Greece O Tahmazidis --- Department of Pathology,Melanoma has become a common form of cancer. The incidence of melanoma tends to increase with increasing latitude, being low in southern, sunny tropical areas, where dark skins are more prevalent, and high in the north, in temperature areas, where... -
Chronic fatigue syndrome: diagnosis and treatment
Item type: Journal Article • Journal: South African Family Practice • Authors: A Revelas --- Pathology Department, E Baltaretsou --- Cardiology Department, GreeceChronic fatigue syndrome (CFS) refers to marked and prolonged fatigue, for which no indentifiable cause can be found. Despite the presence of extensive symptoms, diagnosis is made when there is profound fatigue, lasting for a duration of six months, or... -
Factors which predict interpersonal violence in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Lincoln J Fry --- Sociology and Health Research Units, GreeceBackground: This paper responds to the call for an extensive research agenda to be developed and designed to identify, plan and then implement prevention programmes with respect to violent crime in South Africa. This study began that process by identifying... -
Anaesthesia for a patient with B-thalassaemia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: I Giannakikou --- Department of Anaesthesia, Greece A Karra --- Department of Intensive Care Unit, GreeceΒ-Thalassaemia is a rare hereditary disease caused by partial or complete deficiency of β-haemoglobin chain synthesis. There is a lot of literature regarding anaesthetic management in other haemoglobinopathies (i.e. sickle cell disease), especially in the paediatric population, but there is... -
HHV-8 transmission from mother to child
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Angela Revelas --- Pathological Department, GreeceTransmission of human herpesvirus 8 (HHV-8), the aetiological agent of Kaposi’s sarcoma, is known to occur during sex among homosexual men. However, other modes of HHV-8 transmission have yet to be elucidated in endemic populations. -
Group A streptococcal infections in children
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Angela Revelas --- General Practitioner, Pathological Department, Odysseas Taxmazidis --- General Practitioner, Vardakeio Hospital, GreeceWith the advent of antimicrobials during World War II, and a natural decline that began before then, dread diseases began to assume a less important role, especially in industrialised countries. By the 1970s, acute rheumatic fever and acute glomerulonephritis were... -
Acute gastroenteritis among children in the developing world
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Angela Revelas --- General Practitioner, GreeceAcute gastroenteritis represents a major cause of morbidity and mortality worldwide. Young children are affected most frequently, with three to 10 episodes of diarrhoea per subject per year, a rate that decreases to less than one episode annually for children... -
A study concerning splitting and jointly continuous topologies on C(Y,Z)
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dimitris Georgiou --- , , Greece Athanasios Megaritis --- , , Greece Kyriakos Papadopoulos --- , , Kuwait Vasilios Petropoulos --- , , GreeceLet Y and Z be two fixed topological spaces and C(Y, Z) the set of all continuous maps from Y into Z. We construct and study topologies on C(Y, Z) that we call F n(τn)-family-open topologies. Furthermore, we find... -
A study of the order dimension of a poset using matrices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: D.N. Georgiou --- University of Patras, Greece A.C. Megaritis --- Technological Educational Institute of Western Greece, Greece F. Sereti --- University of Patras, GreeceIn every finite poset (X, ≤) we assign the so called order-matrix , where αij ∈ {−2, 0, 1, 2}. Using this matrix, we characterize the order dimension of an arbitrary finite poset. -
On extensions of countable filterbases to ultrafilters and ultrafilter compactness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich --- Department of Mathematics, U.S.A. Paul Howard --- Department of Mathematics, U.S.A. Kyriakos Keremedis --- Department of Mathematics, GreeceWe show in the Zermelo-Fraenkel set theory ZF without the axiom of choice: Given an infinite set X, the Stone space S(X) is ultrafilter compact.For every infinite set X, every countable filterbase of X extends to an ultra-filter iff for every... -
On lightly and countably compact spaces in
ZF Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Kyriakos Keremedis --- Department of Mathematics, GreeceGiven a topological space X = (X, T ), we show in the Zermelo-Fraenkel set theory ZF that: Every locally finite family of open sets of X is finite iff every pairwise disjoint, locally finite family of open sets is finite.Every... -
Lobbyscape: A framework about the effect of hotel lobbies’ atmospheric elements on customer satisfaction
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Minoas Pytharoulakis --- , Greece Georgia Zouni --- , GreeceThis article aims to present a new conceptual model about the “lobbyscape” (i.e. the “servicescape” of hotel lobbies or foyers). A review of the existing literature, along with the authors’ expertise, provided four dimensions and 25 atmospheric elements for the... -
Development and testing of volume models for Pinus nigra Arn., Fagus sylvatica L., and Quercus pubescens Willd.
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Dimitrios I Raptis --- , Greece Vassiliki Kazana --- , Greece Angelos Kazaklis --- , Greece Christos Stamatiou --- , GreeceVolume models were developed and tested for Pinus nigra Arn., Fagus sylvatica L., and Quercus pubescens Willd. to accurately predict the woody stem volume at tree level, since despite the economic importance of these species in the Mediterranean type of... -
On irreducible denumerable continuous parameter circuit chains: Analysis of a generalized sample path case
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Chrysoula V. Ganatsiou --- , GreeceBy using the cycle-circuit representation theory of Markov processes we investigate the continuous parameter analogue of the existence and construction of a class of irreducible, denumerable Markov chains generated by a collection of overlapping directed weighted circuits regarding a generalized... -
Covering dimension and ideal topological spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.C. Megaritis --- , GreeceIn this paper we study dimensions of the type dim for the class of ideal topological spaces. We shall start from the classical definition of the dimension functions dim and dim*, continue with the dimension -dim and finally, give two... -
The political economy of bilateral aid: African development and the manufacture of consent
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Peter Blunt --- University of New South Wales, Australia Cecilia Escobar --- Independent Researcher and Consultant, Greece Vlassis Missos --- University of Athens, GreeceThis paper discusses implications for African development arising from our analysis of the political economy of bilateral aid (Blunt, 2023). We argue that the existential threats posed to life on Earth by global warming and nuclear war are a product... -
Rating to economic profit: Valuation properties, implementation issues, and the justification of target prices
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Apostolos Ballas --- Athens University of Economics and Business, Greece Grigoria Chlomou --- Edinburgh Napier University, UK Efthimios Demirakos --- Athens University of Economics and Business, GreeceThis study offers a comprehensive theoretical and empirical analysis of a fundamentals-based investment criterion (HSBC’s Rating to Economic Profit – REP). By employing a large sample of US-listed firms over a 12-year time-period and conducting univariate, multivariate and portfolio analyses,... -
Colonisation patterns and reef growth of the invasive serpulid Ficopomatus enigmaticus in a Greek coastal lagoon
Item type: Journal Article • Journal: African Zoology • Authors: Athanasia-Violeta Ntzoumani --- University of Patras, Greece Sarah Faulwetter --- University of Patras, Greece Konstantinos G Nikolakopoulos --- University of Patras, Greece Pavlos Avramidis --- University of Patras, Greece Alexis Ramfos --- University of Patras, GreeceThe reef-building serpulid polychaete Ficopomatus enigmaticus is an invasive species in brackish waters in tropical and temperate zones worldwide and often has massive impacts on ecosystems and anthropogenic activities. In Prokopos Lagoon in Greece, the species has constructed large reefs... -
A closed range integral operator on Hardy spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Fani Papageorgiou --- University of Crete, GreeceIf , then the integral operator is defined as , for and for all . In this paper, we prove necessary and sufficient conditions for the operator Sg to have closed range on Hp for the case 0 < p... -
Subjective well-being and parenting in adolescence: Do peers matter when things are not so good?
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Aikaterini Lampropoulou --- National and Kapodistrian University of Athens, GreeceObjective: The study aimed to investigate the association between adolescents’ subjective well-being and parenting, as well as the moderating role of peer relationships between the negative aspects of parenting and subjective well-being.