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Search Results: 1 - 10 of 469369 matches for " Alejandro A. Lambert "
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Biomass Wastes: An Energy Option for Baja California, México  [PDF]
Gisela Montero, Marcos A. Coronado, Hector E. Campbell, Jesus Cerezo, Alejandro A. Lambert, Edgar E. Valenzuela
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24021
Abstract: Cotton and wheat crops are essential part of the Baja California agricultural production. Such crops generate waste biomass after each harvest cycle, which is almost fully openly burned in order to clear land for the next cycle. Thus in the agricultural 2011 cycle, 542,000 tonnes of straw were generated from wheat in the Mexicali Valley. In addition, the residue from the cotton consisting of stalks exceeded 143,000 tonnes. All these residues are a source of energy that is discarded annually equivalent to 10.19 PJ. Therefore, in addition to determining the biomass potential available in the state from such wastes, the aim of this paper is to propose options for the use of the energy contained in the waste biomass considering the characteristics of raw material available and existing technologies. The results show that there is the potential to generate electricity with a system of 105 MW of installed capacity, and also obtain annually 6.4 million liters of biodiesel. Obtaining this biofuel is by a transesterification reaction of waste vegetable oils, considering an average efficiency of 80% conversion, based on experimental results obtained with mixtures from Mexicali.
Cáncer de ovario en el Instituto Nacional de Oncología y Radiobiología de Cuba: 2001 a 2005 Ovarian cancer at the National Institute of Oncology and Radiobiology of Cuba: 2001-2005
Juan Edmundo Rodríguez Reigosa,Lorena Patricia Guerrero García,Roberto Pablo Esperón Noa,Alejandro Linchenat Lambert
Revista Cubana de Cirugía , 2009,
Abstract: INTRODUCCIóN. El cáncer de ovario ocupa el tercer lugar entre los cánceres ginecológicos y a él se debe el 5 % de todas las muertes por cáncer. El objetivo del presente estudio fue conocer la incidencia hospitalaria, la respuesta al tratamiento y la supervivencia global del cáncer de ovario en nuestra institución, durante un quinquenio. MéTODOS. Se realizó un estudio retrospectivo, descriptivo, lineal con 192 mujeres con tumores de ovario. Se excluyeron aquellas con tumores benignos o tumores no extirpables, y las que no recibieron tratamiento oncoespecífico o lo recibieron y fueron seguidas en otros hospitales. RESULTADOS. Los grupos etarios más afectados correspondieron al quinto y sexto decenios de la vida (40,4 %) y la media de edad fue de 48 a os. La etapa clínica más frecuente fue la III (261 %) de las mujeres, y el 44,2 % estaba en estadio IIIc. El tipo histológico más frecuente fue el adenocarcinoma papilar seroso (H" 70 %), entre los cánceres epiteliales (49; 94,23 %). La supervivencia global media de las pacientes que recibieron tratamiento quirúrgico fue de 31 meses. Al finalizar el estudio la tasa de supervivencia era menor del 40 %. En las pacientes que no respondieron a la quimioterapia la supervivencia a los 36 meses fue nula. CONCLUSIONES. El comportamiento del cáncer ovárico en el Instituto Nacional de Oncología y Radiobiología de Cuba no difiere mucho de lo reportado en la literatura médica mundial. INTRODUCTION. Ovarian cancer occupies the third place among the gynecological cancers, and it causes 5 % of all the deaths from cancer. The objective of this study is to know the hospital incidence, the response to the treatment and the global survival of ovarian cancer in our institution during a five-year term. METHODS. A descriptive, retrospective and lineal study was carried out among 192 females with ovarian tumors. Those with benign or non resectable tumors were excluded, as well as the patients that did not receive oncospecific treatment or that received it, but were followed-up in another hospital. RESULTS. The most affected age groups were in the fifth and sixth decades of life (40.4 %). Mean age was 48 years old. The most common clinical stage was the stage III (261 % of the females). 44.2 % were at stage IIIc. The most frequent histological type was the serous papillary adenocarcinoma (H" 70 %) among the epithelial cancers (49; 94.23 %). The global mean survival of the patients that received surgical treatment was 31 months. At the end of the study, the survival rate was under 40 %. Survival after the 36 months was null among the
Comparison of Interval Constraint Propagation Algorithms for Vehicle Localization  [PDF]
I. K. Kueviakoe, A. Lambert, P. Tarroux
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.512B030
Abstract: Interval constraint propagation (ICP) algorithms allow to solve problems described as constraint satisfaction problems (CSP). ICP has been successfully applied to vehicle localization in the last few years. Once the localization problem has been stated, a large class of ICP solvers can be used. This paper compares a few ICP algorithms, using the same experimental data, in order to rank their performances in terms of accuracy and computing time.
Routine general practice care for panic disorder within the lifestyle approach to managing panic study
Rodney A. Lambert
Mental Illness , 2012, DOI: 10.4081/mi.2012.e18
Abstract: Routine general practice (GP) care is rarely comprehensively described in clinical trials. This paper examines routine GP care within the lifestyle approach to managing panic (LAMP) study. The aim of this paper is to describe/discuss routine GP care for panic disorder (PD) patients within both study arms in the LAMP study. An unblinded pragmatic randomised controlled trial in 15 East of England GP practices (2 primary care trusts). Participants met Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria for PD with/without agoraphobia. Follow-up measures recorded at 20 weeks/10 months following randomisation. Control arm, unrestricted routine GP care (practice appointments, referrals and prescriptions). Trial arm, occupational therapyled lifestyle treatment comprising lifestyle review of fluid intake, diet pattern, exercise, caffeine, alcohol and nicotine. Primary outcome measure: beck anxiety inventory. At baseline, participants attended 2-3 times more GP appointments than population average, reducing at 10 months to 1.6 times population average for routine GP care and 0.97 population average for lifestyle arm. At 10 months, 33% fewer referrals (6 referrals; 0 mental health) than at baseline (9 referrals; 2 mental health) were made for lifestyle arm patients compared with 42% increase (from 12 referrals; 8 mental health at baseline to 17 referrals; 7 mental health) in GP care arm. Selective serotonin reuptake inhibitors were prescribed most often. Benzodiazepines and beta-blockers were prescribed more often than tricyclic against current clinical guidelines. In conclusion, we found that PD patients at baseline were high healthcare resource users. Treatment in both study arms reduced resource use. Routine GP care requires further review for this patient group.
Self-consistent current-voltage characteristics of superconducting nano-structures
A Martin,CJ Lambert
Physics , 1995, DOI: 10.1103/PhysRevB.51.17999
Abstract: By solving the Bogoliubov - de Gennes equation self-consistently in the presence of a non-equilibrium quasi-particle distribution, we compute the current-voltage characteristic of a phase coherent superconducting island with a tunnel barrier at one end. The results show significant structure, arising from the competition between scattering processes at the boundaries of the island and modification of the order parameter by quasi-particles and superflow. This structure is not present in non self-consistent descriptions of normal-superconducting nano-structures.
Stability of Wavelengths and Spatiotemporal Intermittency in Coupled Map Lattices
A. Lambert,R. Lima
Physics , 1994, DOI: 10.1016/0167-2789(94)90006-X
Abstract: In relation to spatiotemporal intermittency, as it can be observed in coupled map lattices, we study the stability of different wavelengths in competition. Introducing a two dimensional map, we compare its dynamics with the one of the whole lattice. We conclude a good agreement between the two. The reduced model also allows to introduce an order parameter which combines the diffusion parameter and the spatial wavelength under consideration.
Quantum Resonances of Weakly Linked, Mesoscopic, Superconducting Dots
A Martin,CJ Lambert
Physics , 1994,
Abstract: We examine quantum properties of mesoscopic, Josephson coupled superconducting dots, in the limit that charging effects and quantization of energy levels within the dots are negligible, but quasi-particle transmission into the weak link is not. We demonstrate that quasi-particle resonances lead to current-phase relations, which deviate markedly from those of weak links connecting macroscopic superconductors. Results for the steady state dc Josephson current of two coupled dots are presented.
Kinetical Inflation and Quintessence by F-Harmonic Map  [PDF]
Antonin Kanfon, Dominique Lambert Lambert
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.311213
Abstract: We were interested, along this work, in the phenomena of the quintessence and the inflation due to the F-harmonic maps, in other words, in the functions of the scalar field such as the exponential and trigo-harmonic maps. We showed that some F-harmonic map such as the trigonometric functions instead of the scalar field in the lagrangian, allow, in the absence of term of potential, reproduce the inflation. However, there are other F-harmonic maps such as exponential maps which can’t produce the inflation; the pressure and the density of this exponential harmonic field being both of the same sign. On the other hand, these exponential harmonic fields redraw well the phenomenon of the quintessence when the variation of these fields remains weak. The problem of coincidence, however remains.
Textbook Evaluation: The Communicative Imperativeness of Illustrative Materials for Effective Teaching Outcomes in Nigeria  [PDF]
Lambert A. Ihebuzor, Noel A. Ihebuzor
Open Access Library Journal (OALib Journal) , 2015, DOI: 10.4236/oalib.1101689
Abstract: This paper examines the importance of effective graphics of communication in the design of books for effective teaching-learning outcomes. The paper underscores the critical importance of textbooks in the teaching-learning dyadic relationship. It reiterates the fact that textbooks are veritable sources of information and communication to the teachers and learners. It thus elucidates the need for the provision of suitable illustrative materials for textbook publishing and development. The paper then goes on to examine the critical issues when assessing and evaluating the quality of illustrations in books.
Stochastic partial differential equations with singular terminal condition
A. Matoussi,Lambert Piozin,A. Popier
Mathematics , 2015,
Abstract: In this paper, we first prove existence and uniqueness of the solution of a backward doubly stochastic differential equation (BDSDE) and of the related stochastic partial differential equation (SPDE) under monotonicity assumption on the generator. Then we study the case where the terminal data is singular, in the sense that it can be equal to +$\infty$ on a set of positive measure. In this setting we show that there exists a minimal solution, both for the BDSDE and for the SPDE. Note that solution of the SPDE means weak solution in the Sobolev sense.
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