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Search Results: 1 - 10 of 223781 matches for " R. Silwal "
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Interpretation of Dune Genesis from Sedimentogical Data and Ground Penetrating Radar (GPR) Signatures: A Case Study from Ashirmata Dune Field, Mandvi Beach, Gujarat, India  [PDF]
Deshraj Trivedi, Koravangatt Devi, Ilya Buynevich, P. Srinivasan, K. Ravisankar, Vipul Silwal, D. Sengupta, Rajesh R. Nair
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.34078
Abstract: The coastal dunes located near the Ashirmata region, south of Mandvi beach lies near the straight coast have been stud-ied by making use of sedimentological information and Ground Penetrating Radar (GPR) data. Sedimentological analy-sis reveals the NNW-SSE trending longitudinal dunes consists of well sorted fine sands with unimodal distribution pos-sibly formed by constant wind gust and also the point out to the origin of sediments from single source; mostly the sediments derived from Indus delta transported to beach by long shore drift and tidal waves, carried inland by local on-shore winds. The radargram confirms, the homogenous sand layers with paleosols at shallow depth slip faces are proba-bly formed due to extreme storm activity of Recent.
Solitary pulse solutions of a coupled nonlinear Schr?dinger system arising in optics
Sharad Silwal
Mathematics , 2015,
Abstract: We prove the existence of travelling-wave solutions for a system of coupled nonlinear Schr\"{o}dinger equations arising in nonlinear optics. Such a system describes second-harmonic generation in optical materials with $\chi^{(2)}$ nonlinearity. To prove the existence of travelling waves, we employ the method of concentration compactness to prove the relative compactness of minimizing sequences of the associated variational problem.
Existence of bound states for (N+1)-coupled long-wave--short-wave interaction equations
Sharad Silwal
Mathematics , 2015,
Abstract: We prove the existence of an infinite family of smooth positive bound states for (N +1)-coupled long-wave--short-wave interaction equations. The system describes the interaction between N short waves and a long wave and is of interest in physics and fluid dynamics.
Benefits and Limitations of Laparoscopic Myomectomy  [PDF]
Silwal Bal Mukunda, Yang Shen, Shrestha Sugandha
Open Journal of Obstetrics and Gynecology (OJOG) , 2019, DOI: 10.4236/ojog.2019.93030
Abstract: Uterine fibroids (also called leiomyoma or myoma) are the most common benign tumor among women of childbearing age. These are often discovered during bimanual examinations and/or ultrasound examinations. Laparoscopic myomectomy offers several benefits to patients such as less blood loss during operation, quick postoperative recovery and shorter hospital stay in comparison to open myomectomy. It has been widely used over the past decades as possible alternative to the traditional laparotomy. In spite of several benefits laparoscopic myomectomy has certain drawbacks such as prolonged time of anesthesia, time consuming procedure, comparatively expensive and weak strength of the uterine scar. Furthermore laparoscopic myomectomy is technically challenging procedure so it requires high degree of training and skill to perform it. Due to its several advantages, it should be taken into consideration for the removal of uterine fibroids.
Process evaluation of a community-based intervention promoting multiple maternal and neonatal care practices in rural Nepal
Robert A McPherson, Jyotsna Tamang, Stephen Hodgins, Laxmi R Pathak, Ram C Silwal, Abdullah H Baqui, Peter J Winch
BMC Pregnancy and Childbirth , 2010, DOI: 10.1186/1471-2393-10-31
Abstract: We examined use of the booklet and factors affecting adoption of practices through semi-structured interviews with district and community-level government health personnel, staff from the Nepal Family Health Program, FCHVs, recently delivered women and their husbands and mothers-in-law.The booklet is shared among household members, promotes discussion, and is referred to when questions arise or during emergencies. Booklet cards on danger signs and nutritious foods are particularly well-received. Cards on family planning and certain aspects of birth preparedness generate less interest. Husbands and mothers-in-law control decision-making for maternal and newborn care-seeking and related household-level behaviors.Interpersonal peer communication through trusted community-level volunteers is an acceptable primary strategy in Nepal for promotion of household-level behaviors. The content and number of messages should be simplified or streamlined before being scaled-up to minimize intervention complexity and redundant communication.Nepal is projected to meet the Millennium Development Goal to reduce under-five mortality by two-thirds by 2015 [1,2]. Child mortality (children aged 12 to 59 months) has declined notably in Nepal over the past 15 years while neonatal mortality has declined more modestly; an apparent reduction in maternal mortality over the same period is practically significant but has borderline statistical significance [1,3].Improved maternal and newborn health (MNH) outcomes can be achieved by improving quality of and access to services and through positive changes in household practices and care-seeking. In Nepal, the potential impact of strengthened antenatal, delivery and postpartum care in community-level and referral facilities is constrained by a preference for home delivery and poor geographic access to health facilities.Positive changes in MNH-related household behaviors and care-seeking can be achieved through a variety of strategies. Community mobi
A visual formalism for weights satisfying reverse inequalities
Sapto Indratno,Diego Maldonado,Sharad Silwal
Mathematics , 2013, DOI: 10.1016/j.exmath.2013.12.008
Abstract: In this expository article we introduce a diagrammatic scheme to represent reverse classes of weights and some of their properties.
Revenue distribution pattern and park-people conflict in Chitwan National Park, Nepal
T Silwal,BP Shrestha,BP Bhatta,BP Devkota
Banko Janakari , 2013, DOI: 10.3126/banko.v23i1.9465
Abstract: This study has assessed patterns and consequences of park revenue sharing and implementation effectiveness to reduce park-people conflict in the Buffer Zone of Chitwan National Park. To explore programme implementation practice and consequences, two-thirds (n=14) of user committees were selected from the four management sectors. From the sampled committees, a questionnaire survey was randomly taken from user groups (n=100) to collect income and expenditure data. The revenue disbursement trends were favoured in community development works (roads, community buildings and schools) than conflict reduction issues. Fourty-two per cent of the total budget was allocated to infrastructures development, which was followed by conservation and conflict management (35%) and education (9%). Only a small amount of the budget was allocated to alternative energy, construction of animal preventive infrastructures to control wild-animals entering farmland and settlement, and provisions for wildlife damage compensation schemes. A certain part of the revenue should be allocated to wildlife victims. Furthermore, the process of providing relief funds should be shortened and simplified. Banko Janakari, Vol. 23, No. 1, Page 35-41 DOI: http://dx.doi.org/10.3126/banko.v23i1.9465
Weak charge form factor and radius of 208Pb through parity violation in electron scattering
C. J. Horowitz,Z. Ahmed,C. -M. Jen,A. Rakhman,P. A. Souder,M. M. Dalton,N. Liyanage,K. D. Paschke,K. Saenboonruang,R. Silwal,G. B. Franklin,M. Friend,B. Quinn,K. S. Kumar,J. M. Mammei,D. McNulty,L. Mercado,S. Riordan,J. Wexler,R. W. Michaels,G. M. Urciuoli
Physics , 2012, DOI: 10.1103/PhysRevC.85.032501
Abstract: We use distorted wave electron scattering calculations to extract the weak charge form factor F_W(q), the weak charge radius R_W, and the point neutron radius R_n, of 208Pb from the PREX parity violating asymmetry measurement. The form factor is the Fourier transform of the weak charge density at the average momentum transfer q=0.475 fm$^{-1}$. We find F_W(q) =0.204 \pm 0.028 (exp) \pm 0.001 (model). We use the Helm model to infer the weak radius from F_W(q). We find R_W= 5.826 \pm 0.181 (exp) \pm 0.027 (model) fm. Here the exp error includes PREX statistical and systematic errors, while the model error describes the uncertainty in R_W from uncertainties in the surface thickness \sigma of the weak charge density. The weak radius is larger than the charge radius, implying a "weak charge skin" where the surface region is relatively enriched in weak charges compared to (electromagnetic) charges. We extract the point neutron radius R_n=5.751 \pm 0.175 (exp) \pm 0.026 (model) \pm 0.005 (strange) fm$, from R_W. Here there is only a very small error (strange) from possible strange quark contributions. We find R_n to be slightly smaller than R_W because of the nucleon's size. Finally, we find a neutron skin thickness of R_n-R_p=0.302\pm 0.175 (exp) \pm 0.026 (model) \pm 0.005 (strange) fm, where R_p is the point proton radius.
Definitive heat of formation of methylenimine, CH2=NH, and of methylenimmonium ion, CH2NH2+, by means of W2 theory
Glenisson de Oliveira,Jan M. L. Martin,Indira K. C. Silwal,Joel F. Liebman
Physics , 2001,
Abstract: A long-standing controversy concerning the heat of formation of methylenimine has been addressed by means of the W2 (Weizmann-2) ab initio thermochemical approach. Our best calculated values, DeltaHf298(CH2NH)=21.1+/-0.5 kcal/mol and DeltaHf298(CH2NH2+)=179.4+/-0.5 kcal/mol, are in good agreement with the most recent measurements but carry a much smaller uncertainty. As a by-product, we obtain the first-ever accurate anharmonic force field for methylenimine: upon consideration of the appropriate resonances, the experimental gas-phase band origins are all reproduced to better than 10 cm-1. Consideration of the difference between a fully anharmonic zero-point vibrational energy and B3LYP/cc-pVTZ harmonic frequencies scaled by 0.985 suggests that the calculation of anharmonic zero-point vibrational energies can generally be dispensed with, even in benchmark work, for rigid molecules.
Early Results from the Qweak Experiment
D. Androic,D. S. Armstrong,A. Asaturyan,T. Averett,J. Balewski,J. Beaufait,R. S. Beminiwattha,J. Benesch,F. Benmokhtar,J. Birchall,R. D. Carlini,G. D. Cates,J. C. Cornejo,S. Covrig,M. M. Dalton,C. A. Davis,W. Deconinck,J. Diefenbach,J. F. Dowd,J. A. Dunne,D. Dutta,W. S. Duvall,M. Elaasar,W. R. Falk,J. M. Finn,T. Forest,D. Gaskel,M. T. W. Gericke,J. Grames,V. M. Gray,K. Grimm,F. Guo,J. R. Hoskins,K. Johnston,D. Jones,M. Jones,R. Jones,M. Kargiantoulakis,P. M. King,E. Korkmaz,S. Kowalski,J. Leacock,J. Leckey,A. R. Lee,J. H. Lee,L. Lee,S. MacEwan,D. Mack,J. A. Magee,R. Mahurin,J. Mammei,J. Martin,M. J. McHugh,D. Meekins,J. Mei,R. Michaels,A. Micherdzinska,A. Mkrtchyan,H. Mkrtchyan,N. Morgan,K. E. Myers,A. Narayan,L. Z. Ndukum,V. Nelyubin,Nuruzzaman,W. T. H van Oers,A. K. Opper,S. A. Page,J. Pan,K. Paschke,S. K. Phillips,M. L. Pitt,M. Poelker,J. F. Rajotte,W. D. Ramsay,J. Roche,B. Sawatzky,T. Seva,M. H. Shabestari,R. Silwal,N. Simicevic,G. R. Smith,P. Solvignon,D. T. Spayde,A. Subedi,R. Subedi,R. Suleiman,V. Tadevosyan,W. A. Tobias,V. Tvaskis,B. Waidyawansa,P. Wang,S. P. Wells,S. A. Wood,S. Yang,R. D. Young,S. Zhamkochyan
Physics , 2013, DOI: 10.1051/epjconf/20146605002
Abstract: A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the protons weak charge Qweak(p). The experiment employed a 180 uA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons corresponding to Q2 of 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of Qweak(p) to 4.2 percent (combined statistical and systematic error), which implies a measure of sin2(thetaw) at the level of 0.3 percent, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the worlds highest power LH2 target. The new constraints on C1u and C1d provided by the subset of the experiments data analyzed to date will also be shown, together with the extracted weak charge of the neutron.
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