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Survival and movement of the Congo forest mouse (Deomys ferrugineus): a comparison of primary rainforest and fallow land in Kisangani, Democratic Republic of the Congo
Jan Kennis,C. Laurent,N.D. Amundala,A.M. Dudu
African Zoology , 2012,
Abstract: The congo forest mouse, Deomys ferrugineus, occurs readily in natural and human-altered habitats in the region of Kisangani (Democratic Republic of the Congo). We studied survival and movement patterns of D. ferrugineus in both habitats. Capture-mark-recapture was used to study the effects of habitat on rodent life history both in primary rainforest and fallow land. Survival analyses taking into account trap-happiness effects were conducted using the program MARK. Abundance of D. ferrugineus was generally low within all our study grids, but it was lowest in fallow land compared to primary rainforest. Numbers of reproductively active females captured were not different between habitats but were larger during the rainy seasons. Daily movements of females, but not of males, were smaller in fallow land. Capture-mark-recapture analyses showed recapture probabilities to vary highly between grids and years. Survival probability in the primary forest was higher than in fallow land with a difference of 0.084 over a period of four weeks. This is possibly linked to the more abundant presence of the main food source (insects and termites); however other explanations are discussed in the text.
Resolución cooperativa de problemas en forma presencial y a distancia tipo chat en díadas y tétradas
N.D. Roselli
Interdisciplinaria , 2004,
Abstract: El objetivo de esta investigación fue analizar comparativamente la interacción socio-cognitiva directa (cara a cara) y la interacción mediada informáticamente tipo chat, en díadas y tétradas de sujetos, en una tarea de resolución de problemas. Se trabajó con 12 díadas y 12 tétradas de alumnos de los dos últimos a os del nivel polimodal (16 y 17 a os de edad). El material utilizado consistió en dos series paralelas (igual estructura lógica) de problemas. A cada díada y tétrada se le requirió realizar un trabajo en equipo que consistía en resolver en colaboración, una serie de problemas en cada modalidad testeada: directa y mediada. Tanto el orden de las modalidades como la asignación de las series de problemas a cada modalidad fueron balanceados en el transcurso del experimento. Los datos recogidos muestran que no hay diferencias significativas entre las modalidades en lo que hace a la calidad de los resultados. En cambio sí se constatan manifiestas diferencias con respecto a las características formales del intercambio, las que pueden ser adjudicadas a la naturaleza intrínseca del canal de comunicación.
REMINISCENCE CAN BE MISLEADING
N.D. Orpen
Scientia Militaria : South African Journal of Military Studies , 2012, DOI: 10.5787/10-4-694
Abstract: As a full-time military historian, I have found Militaria a most valuable source and invariably interesting, but after reading the 'Herinneringe' of so well-known a soldier as General 'Matie' du Toit in your issue No 10/2 of 1980, I feel that it is only fair to draw attention of all serious students of history to the fact that reminiscences cannot be entirely relied upon unless they are very carefully checked and sub-edited before publication.
Impact properties of the aircraft cast aluminium alloy Al-7Si0.6Mg (A357)
Alexopoulos N.D.
EPJ Web of Conferences , 2010, DOI: 10.1051/epjconf/20100602002
Abstract: The impact mechanical properties of the widely used in the aeronautics A357 cast aluminum alloy were investigated by exploiting experiments on an instrumented Charpy impact testing machine. The evaluated impact properties for 25 different artificial aging heat treatment conditions were analyzed and discussed in conjunction with the respective tensile properties. Correlations are proposed to establish useful relationships between impact resistance and tensile strain energy density properties. The established correlations, which are well supported by the performed experiments, can be used to estimate the tensile ductility and toughness of the A357 cast aluminum alloy from the Charpy impact test. Performed fractographic analyses were supporting the physically arbitrary correlation between tensile strain energy density and impact resistance.
Neonatal Anthropometric Parameters And Indicators Of High Risk Factors
Banik N.D Datta
Indian Journal of Community Medicine , 1989,
Abstract: One thousand seven hundred and twenty five singleton new born infants were samples for anthropometrics measurements like birth weight, recumbent length, crown a€" rump length, circumferences of head, chest, mid a€" arm and calf and bony- width measurements of humerus, femur and pelvis. All the measurements were taken within 24 hours after birth. The newborns were divided into five groups according to birth weight (g) up to 2000-(A). 2001- 2500-(B), 2501- 3000-(C), 3001 a€" 3500 (D) and 3500 and above-(E). It was seen that there was a good relationship between birth weight and other anthropometrics parameters in newborn babies. The data showed that increase in mean birth weight followed a linear model in relation to all other parameters studied. It is suggested that the criteria of low birth weight for Indian babies should be fixed at 2000g or less (A). It was shown that the incidence of respiratory distress, feeding problems and mortality rate were maximum in babies in group (A) and were relatively less among babies belonging to groups (B), (C) (D) and (E). Low birth weight babies belonging to groups (B), (C), (D) and (E) were given domiciliary care by the mothers with guidance of lady health visitors and doctors of the research team.
The Middle Equitable Dominating Graphs  [PDF]
Anwar Alwardi, N.D. Soner, Ahmad N. Al-Kenani
Open Journal of Discrete Mathematics (OJDM) , 2012, DOI: 10.4236/ojdm.2012.23017
Abstract: Let G= (V, E) be a graph and A(G) is the collection of all minimal equitable dominating set of G. The middle equitable dominating graph of G is the graph denoted by Med(G) with vertex set the disjoint union of V∪A(G) and (u, v) is an edge if and only if u ∩ v ≠ φ whenever u, v ∈ A(G) or u ∈ v whenever u ∈ v and v ∈ A(G) . In this paper, characterizations are given for graphs whose middle equitable dominating graph is connected and Kp∈Med(G) . Other properties of middle equitable dominating graphs are also obtained.
Pyrolysis Modelling in a Wood Stove
RAJESH GUPTA,Dr. N.D. MITTAL
International Journal of Engineering Science and Technology , 2010,
Abstract: A simple empirical model for predicting the pyrolysis rate of fuel packed bed of a woodstove has been presented. The thermolytic behavior of the fuel bed has been approximated by a pseudo-first order reaction. The reaction rate constant has been determined as function of temperature. The effect of orientation of twigs in the fuel bed arrangement and twig diameter on the reaction rate constant has been analyzed. It has been concluded that the effect of twig orientation is insignificant while the peak magnitude of reaction rate constant increased with increasing twig diameter.
FLUID FLOW AND HEAT TRANSFER IN A SINGLE-PAN WOOD STOVE
RAJESH GUPTA,Dr. N.D. MITTAL
International Journal of Engineering Science and Technology , 2010,
Abstract: This paper presents simulation of buoyancy induced flow in an analogue of a single pan wood stove. In the present analysis, flow through fuel bed is modeled as flow through porous medium and heat release in the bulk fluid due to combustion is represented by uniform generation of heat. The heat transfer and fluid flow model is then used to conduct a parametric study of the effects of various geometric and operating parameters namely spacing between the stove and pan, inlet radius, height, diffuser radius, outer radius, porosity of fuel bed and power. The results are discussed with relevance to stove design and performance. In general, the influence of these parameters is observed to be more pronounced on heat ransfer to pan and secondary mass flow rate than on primary flow rate. However, the effect of fuel bed porosity on both primary and secondary flow rates as well as heat transfer is significant.
The Self-Excitation Damping Ratio in Variable Speed Milling
K. Saleh,N.D. Sims
Lecture Notes in Engineering and Computer Science , 2012,
Abstract:
Screening Zizhyphus germ plasm against powdery mildew
T. PRADEEP* and N.D. JAMBHALE
Indian Phytopathology , 2012,
Abstract: Of the 82 ber accessions belonging to Zizhyphus mauritiana and one accession to Z. rugosa evaluated for resistance to powdery mildew under natural epiphytotic conditions, four genotypes viz.,
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