Energy-Momentum Complex in M\o ller's Tetrad Theory of Gravitation

M\o ller's Tetrad Theory of Gravitation is examined with regard to the energy-momentum complex. The energy-momentum complex as well as the superpotential associated with M\o ller's theory are derived. M\o ller's field equations are solved in the case of spherical symmetry. Two different solutions, giving rise to the same metric, are obtained. The energy associated with one solution is found to be twice the energy associated with the other. Some suggestions to get out of this inconsistency are discussed at the end of the paper.Comment: LaTeX2e with AMS-LaTeX 1.2, 13 page

Percepciones y concepciones sobre cultura institucional en los actores de la Instituci?n Educativa Fundadores Ram?n Bueno y Jos? Triana en Girardot

78 P?ginasLa presente publicaci?n evidencia los resultados de una investigaci?n que determin? e interpret? las percepciones y concepciones sobre Cultura Institucional de los directivos docentes, los docentes y los estudiantes de la Instituci?n Educativa Fundadores Ram?n Bueno y Jos? Triana de Girardot en el a?o 2012,dentro de un estudio de tipo mixto que busc? identificar todos los rasgos culturales que ha generado la Instituci?n como ente social aportando elementos te?ricos y metodol?gicos al estudio de la Cultura Organizacional. Para ello, se tuvieron en cuenta tres categor?as que respondieron a cinco ejes: la concepci?n de los valores, las percepci?n de los valores en la realidad, la correspondencia de la misi?n y la visi?n, los rituales en la Instituci?n y las tradiciones, mitos y leyendas en la Instituci?n. Para tal fin se tuvieron en cuenta dos momentos; primero, se realiz? un estudio de Redes Sem?nticas Naturales que utiliz? los cinco ejes como est?mulos generadores; por otra parte, se utiliz? la entrevista para corroborar el estudio cuantitativo tomando como punto de partida las tres categor?as planteadas. Se encontr? que el respeto es el valor que mejor desarrolla la manera de ser de las personas seg?n la concepci?n de los actores de la Instituci?n Educativa, pero en la realidad es el que m?s se infringe por lo que el precepto y la realidad tienen un significado opuesto. Por otro lado, se evidenci? heterogeneidad en la percepci?n de los docentes, directivos docentes y estudiantes frente al impacto que genera la misi?n y la visi?n de la instituci?n. Finalmente, se interpretaron los rituales, tradiciones, mitos y leyendas que ofrecieron una identidad propia del plantel con el fin de fortalecer los que contribuyen a su buen funcionamiento cultural y transformar la concepci?n de las acciones consideradas como negativas. This publication evidences the results of a study that determined and interpreted perceptions and conceptions about institutional culture of school administrators, teachers and students of Institucion Educativa Fundadores Ram?n Bueno y Jos? Triana of Girardot in 2012, within a mixed type study sought to identify all cultural features generated by the institution as a social entity providing theoretical and methodological elements to the study of organizational culture. To this purpose, three categories were considered responding to five axes: the conception of values, the values perceived in reality, the correspondence of the mission and vision, the rituals in the Institution, and traditions, myths and legends in the Institution. To this end, two moments were considered: first, a study of natural semantic networks that used the five axes as stimuli generators, on the other hand, the interview was used to corroborate the quantitative study taking as its starting point the three categories proposed. It was found that respect is the value that best develops the way of being of the people according to the conception of the actors of the educational institution, but in reality it is the most widely violated so the precept and reality have meaning opposite. On the other hand, it was made evident heterogeneity in the perception of teachers, school administrators and students against the impact that generates the mission and vision of the institution. Finally, it was interpreted the rituals, traditions, myths and legends that offered a campus identity in order to strengthen those who contribute to its best cultural operation and transforming conception of the actions considered as negatives.1. PLANTEAMIENTO DEL PROBLEMA 14 1.1 CONTEXTUALIZACION DEL PROBLEMA 14 1.2 DESCRIPCI?N DEL PROBLEMA 14 1.3 FORMULACION DEL PROBLEMA 16 1.3.1 Pregunta Principal 16 1.3.2 PREGUNTAS SECUNDARIAS 16 2. JUSTIFICACION 17 3. OBJETIVOS 18 3.1. OBJETIVO GENERAL 18 3.2. OBJETIVOS ESPEC?FICOS 18 4. MARCO TEORICO Y CONCEPTUAL 19 4.1 ANTECENDENTES 19 4.2 HACIA EL CONCEPTO DE CULTURA INSTITUCIONAL 20 4.2.1 Concepciones sobre cultura institucional 22 4.2.2 Enfoques o perspectivas de la cultura Institucional 22 4.3 LA CULTURA INSTITUCIONAL HECHA VALORES Y PRINCIPIOS 26 4.4 LA MISI?N Y LA VISI?N EN EL MARCO DE LA CULTURA INSTITUCIONAL 28 4.5 TRADICIONES, MITOS, RITOS Y CREENCIAS EN LA ESCUELA.29 5. METODOLOGIA 33 5.1 TIPO DE INVESTIGACI?N 33 5.2 T?CNICAS E INSTRUMENTOS. 33 5.3 PARTICIPANTES 33 5.4 PROCEDIMIENTOS 34 5.5 LA ENCUESTA 36 5.6 T?CNICAS Y PROCEDIMIENTOS DE AN?LISIS DE LA INFORMACI?N 36 6. RESULTADOS 37 6.1 RESULTADOS PARA LA PALABRA EST?MULO: CONCEPTO DE VALOR 37 6.2 RESULTADOS PARA LA PALABRA EST?MULO: VALORES Y PRINCIPIOS EN LA REALIDAD 42 6.3 RESULTADOS PARA LAS PALABRAS EST?MULO: MISI?N Y VISI?N COMO IMPACTO 48 6.4 RESULTADOS PARA LAS PALABRAS EST?MULO: TRADICIONES, MITOS Y LEYENDAS EN LA CULTURA DE LA I.E. 56 6.5 RESULTADOS PARA LAS PALABRAS EST?MULO: RITUALES EN LA CULTURA DE LA I.E. 62 7. CONCLUSIONES70 REFERENCIAS 7

Discerning Where They Are: Understanding Current Housing Trends and Related Internal Processes of Six Minneapolis Neighborhood Organizations.

Conducted on behalf of Minneapolis Neighborhood Early Warning System. Sponsored by Neighborhood Planning for Community Revitalization, Center for Urban and Regional Affairs, University of Minnesota

A preliminary study on the effect of employing bile liquid in a starter diet on performance of young heavy breed chicks

Heavy breed day-old chicks fed Isonitrogenous-Isocaloric diets supplemented with 0.0, 2.0 and 4.0% fresh bovine bile liquid, for three weeks. The three types of diets comprised the experimental dietary treatments, from which the effect of including bile liquid in heavy breed chicks diet on their most prominent economical traits were studied. Results showed that the three groups of birds, consumed almost the same amount of feed during the three weeks of experimental period. However, a significant increase in daily growth rate(DGR)occurred as a result of bile liquid in starter diets. The estimated superiority of this traits, DGR, was found to be 10.76% on an average basis, higher than that of the control group. A good reflection of this phenomenon on feed conversion ratio was observed, as birds fed diets contained 2.0 and 4.0% bile liquid surpassed the control group by 8.75 and 10.63%, respectively. Body weights at third week of age were 8.06 and 10.60% heavier for the two treated groups, respectively, than the control one. Results indicate that the nutritive value of starter diets supplemented with bile liquid warrant further investigation based on long term experiments to make a decision in this direction

Dental Residents’ Knowledge and Attitude towards Stem Cells and Regenerative Dentistry

Objectives: Success of regenerative dental procedures highly depends on their acceptance by the clinicians; yet, little is known about dental residents’ attitudes regarding this new technology. The purpose of this study was to assess the knowledge and attitude of post-graduate dental students towards stem cells and regenerative dentistry as part of future dental treatments.Methods: This cross-sectional survey was conducted on 84 third-year residents of various dental specialties. The questionnaire included demographics and professional status of the respondents, questions regarding their ethical beliefs and their clinical practice.Results: Eighty-four completed questioners were returned anonymously. The majorities of the participants were female, and had practiced for ≤ 5 years. The survey showed that 76.2% of the participants had not received any continuing education or training courses on stem cells or regenerative dentistry. The majority of the participants (82.1%) believed that regenerative treatments should be included in dental practice. Of all, 76.2% had no umbilical cord or stem cell banking for themselves or a relative and 63.1% thought that dental pulp stem cell banking would be useful to regenerate dental tissues. Most of the participants (65.5%) had never performed regenerative therapy of any kind in their clinical practice and 51.2% of the participants were not sure whether regenerative procedures would be successful.Conclusion: Although more evidence on the efficacy and safety of regenerative dentistry is required, postgraduate training in this regard seems necessary

Monte Carlo study of phase transitions and magnetic properties of LaMnO3

On the basis of Mean Field Approximation (MFA), Monte Carlo Simulations (MCS) and ab initio calculations we have studied the phase diagrams and magnetic properties of the bulk perovskite, LaMnO3 using Ising model Hamiltonian. It is shown that the antiferromagnetic coupling between next neighbors Mn ions is reponsible for a series of magnetic phase transitions. The transition temperature and the critical exponents obtained, in the framework of Monte Carlo simulations, using the experimental values of the exchange couplings and magnetic anisotropy are in agreement with the experimental ones. The exchange couplings deduced from ab initio calculations lead, by using Monte Carlo simulations, to a quantitative agreement with the experimental transition temperatures

Predictive factors for nutritional behavior among pregnant women attending antenatal care clinic in 6th of October City

Background: Good maternal nutrition during pregnancy is important to ensure health for the mother and the fetus. This study aimed to assess nutritional knowledge and behavior among a group of Egyptian pregnant women in addition to identify the factors influencing their nutritional behavior. Methods: This comparative cross sectional study included 300 pregnant women attending the antenatal care clinics in 6th of October University private hospital and El-Hosary primary healthcare (PHC) unit. The data was collected through a modified nutritional survey that was translated from Spanish to Arabic and revised by language experts for clarity.  Results: Almost all of the women attending the private hospital were university educated while about half of the women attending the PHC unit were graduated from technical education. In general, the level of knowledge about food requirements of both groups was satisfactory good; however, neither of them fulfilled the WHO recommendations of food intake during pregnancy or the optimum number of meals per day. The average random blood glucose was higher among the women attending the PHC unit; the BMI, mid arm circumference and subcutaneous fat were higher among the same group as well. In regard to fulfilling the WHO recommended servings per day, only starch and fat items were fulfilled by both groups, whereas the other three items (vegetables, fruits, meat and dairy products) were merely included in the diets of both groups. Conclusion: Healthy behavior among pregnant women in both group were influenced by their educational level, occupation as well as their pre-gestational BMI. Those were the only three significant predictive factors, where women with higher education showed an active lifestyle. In addition, women starting with normal BMI before pregnancy had better healthy behaviors including the choice of healthy diets

Zoom in at African Country level: Potential Climate Induced Changes in Areas of Suitability for Survival of Malaria Vectors

Predicting anopheles vectors’ population densities and boundary shifts is crucial in preparing for malaria risks and unanticipated outbreaks. Although shifts in the distribution and boundaries of the major malaria vectors (Anopheles gambiae s.s. and An. arabiensis) across Africa have been predicted, quantified areas of absolute change in zone of suitability for their survival have not been defined. In this study, we have quantified areas of absolute change conducive for the establishment and survival of these vectors, per African country, under two climate change scenarios and based on our findings, highlight practical measures for effective malaria control in the face of changing climatic patterns. We develop a model using CLIMEX simulation to estimate the potential geographical distribution and seasonal abundance of these malaria vectors in relation to climatic factors 9temperature, rainfall and relative humidity). The model yielded an eco climatic index (EI) describing the total favorable geographical locations for the species. The EI value were classified and exposed to a GIS package. Using ArcGIS, the EI shape points clipped to the extent of Africa and then converted to a raster layer using inverse Distance Weighted (IDW) interpolation method. Generated maps wre then transformed into polygon-based geo-referenced data set and areas computed and expressed in square kilometers (km2). Five classes of EI were derived indicating the level of survivorship of these malaria vectors. The proportion of areas increasing or decreasing in level of survival of these malaria vectors will be more pronounced in eastern and southern African countries than those in western Africa. Angola, Ethiopia, Kenya, Mozambique, Tanzania, South Africa and Zambia appear most likely to be affected in terms of absolute change of malaria vectors suitability zones under the selected climate change scenarios. The potential shifts of these malaria vectors have implications for human exposure to malaria, as recrudescence of the disease is likely to be recorded in several new areas and regions. Therefore, the need to develop, compile and share malaria preventive measures, which can be adapted to different climatic scenarios, remains crucial. \u

Properties and hydration behavior of blended clinker and portland-sediment cement pastes

In recent years, an increase of the interest in the use of secondary raw materials (sediment, sludge…) in construction has been observed.  This paper aims to contribute to the use of dredging sediments in the cement industry. Despite the literature on this subject, the available data on the aspects and phenomena related to the hydration process of such mixtures are incomplete. This paper aims to specify the calorimetric curves of hydration of mixtures made, from the sediment trapped at the site of Lyvet in the Brittany region of France. The mixtures are made ??using in one hand clinker and in the other hand Portland cement. Pastes with 8%, 16% and 33% of clinker or Portland cement substituted by sediment are used to determine the hydraulic properties of mixtures. The physico-chemical characterization of materials is made by different techniques to determine the chemical composition and physical properties. X-ray diffraction is used to determine the mineralogical compositions of samples before and after treatment. A  Tian-Calvet microcalorimeter is used to explore hydration behavior of the blended Sediment-Portland cement pastes. The addition of untreated sediment to both clinker or Portland cement increase the dormant period duration. On the contrary, this period becomes shorter when the sediment is thermally treated. The results show that 8% of treated sediment improve hydration of blended Sediment-Portland cement pastes. Mechanical properties of blended sediment-cements are also investigated. After 28 days of curing in water, the mortar containing 8% of treated sediment exhibits a compressive strength equal to 93.7% of the one of the reference mortar, maintaining it in the same cement class (52.5)