Papers by Manoj Kumar Sharma
Human comfort in conditioned spaces is the prime objective of air conditioning system design engi... more Human comfort in conditioned spaces is the prime objective of air conditioning system design engineer. Air distribution in the conditioned spaces affects the human comfort. Several researchers have examined this human comfort in the conditioned spaces for various parameters of air conditioning and proposed the modifications in the system design and operation. Several new technologies have also been proposed by the researchers for it. Research is also reported in literature for the scope of energy savings through alternative technology of air distribution. It is this objective of the present work to simulate the indoor temperature distribution in a typical conditioned room in which air is supplied at a particular typical value of temperature and velocity most commonly used in practice through three case of supply air vent location. For this analysis numerical technique widely used by the researchers in present time, Computational Fluid Dynamics (CFD) has been used. The geometrical model is prepared is prepared in GAMBIT and Fluent is used for analysis purpose. The results are presented in the form of temperature and velocity contours in the room at three planes taken in the conditioned space. Vertical temperature and velocity distribution is shown with the help of plots at various location of the room. For comparison purpose the temperature and velocity plots have been compared for the three different cases of location of supply air vent
Key Words: Air conditioning, CFD, GAMBIT, Temperature, Temperature distribution, Velocity.
Applied Physics B, May 12, 2014
In spatial filtering experiments, the use of vortex phase filters plays an important role in real... more In spatial filtering experiments, the use of vortex phase filters plays an important role in realizing isotropic edge enhancement. In this paper, we report the use of a vortex dipole phase filter in spatial filtering. A dipole made of fractional vortices is used, and its filtering characteristics are studied. It is observed that the filter performance can be tuned by varying the distance of separation between the vortices of the dipole to achieve better contrast and output noise suppression, and when this distance tends to infinity, the filter performs like a 1-D Hilbert mask. Experimental and simulation results are presented.
A systematic review on health and hygiene in India
Asian Journal of Multidisciplinary Studies, Feb 27, 2015
Teaching modules to build HIV/AIDS knowledge and safer sex skills among African-American college students
Thomas Mathew and Manoj Kumar Sharma
Using Theory of Planned Behavior to predict snack food consumption among upper elementary school children
ABSTRACT
Substance Abuse in African Americans: In Search of a Culturally Competent Research Agenda
Journal of Alcohol and Drug Education, Jan 8, 2006
Analysis of Fibonacci Gratings and their Diffraction Patterns
Journal of the Optical Society of America a, May 19, 2014
Aperiodic and fractal optical elements are proving to be promising candidates in image-forming de... more Aperiodic and fractal optical elements are proving to be promising candidates in image-forming devices. In this paper, we analyze the diffraction patterns of Fibonacci gratings (FbGs), which are prototypical examples of aperiodicity. They exhibit novel characteristics such as redundancy and robustness that keep their imaging characteristics intact even when there is significant loss of information. FbGs also contain fractal signatures and are characterized by a fractal dimension. Our study suggests that aperiodic gratings may be better than their fractal counterparts in technologies based on such architectures. We also identify the demarcating features of aperiodic and fractal diffraction, which have been rather fuzzy in the literature so far.
Systematic review of the role of yoga in improving pregnancy outcomes
ABSTRACT There are 4.3 births every second in the world signifying the magnitude and importance o... more ABSTRACT There are 4.3 births every second in the world signifying the magnitude and importance of pregnancy. The purpose of this study was to review yoga interventions implemented from 2008 to 2013 and examine whether yoga can be an efficacious approach for positively influencing maternal and birth outcomes in pregnancy. A systematic search was conducted for quantitative articles in pregnancy involving all schools of yoga. Following were the inclusion criteria for a study to be included: (1) published in the English language; (2) from the following databases: Medline, CINAHL (Cumulative Index to Nursing and Allied Health), or Alt HealthWatch; (3) between the years January 2008 and December 2013; (4) include any form or school of yoga as an intervention; (5) use any quantitative study design for evaluation; and (6) implemented in prenatal or postnatal period of pregnancy. A total of 13 articles met the inclusion criteria of which five were from the United States, four from India,two from Taiwan and one each from Korea and Thailand. Twelve were from prenatal studies and one was from a postnatal study. Of the twelve prenatal studies eight showed positive changes in maternal psychological or birth outcomes. Of the eight studies that showed positive results, five used randomized controlled designs. The duration of yoga interventions varied from 4 hours to 48 hours, and the mean was 17.1 hours (s.d. 12.9). Limitations of the studies have been discussed. Yoga appears to be a promising intervention for pregnancy.
Role of higher-multipole deformations in exotic C14 cluster radioactivity
Phys Rev C, 2011
We have studied nine cases of spontaneous emission of C14 clusters in the ground-state decays of ... more We have studied nine cases of spontaneous emission of C14 clusters in the ground-state decays of the same number of parent nuclei from the trans-lead region, specifically from Fr221 to Th226, using the preformed cluster model (PCM) of Gupta and collaborators, with choices of spherical, quadrupole deformation (beta2) alone, and higher-multipole deformations (beta2, beta3, beta4) with cold ``compact'' orientations thetac of decay products. The calculated C14 cluster decay half-life times are found to be in nice agreement with experimental data only for the case of higher-multipole deformations (beta2-beta4) and thetac orientations of cold elongated configurations. In other words, compared to our earlier study of clusters heavier than C14, where the inclusion of beta2 alone, with ``optimum'' orientations, was found to be enough to give the best comparison with data, here for C14 cluster decay the inclusion of higher-multipole deformations (up to hexadecapole), together with thetac orientations, is found to be essential on the basis of the PCM. Interestingly, whereas both the penetration probability and assault frequency work simply as scaling factors, the preformation probability is strongly influenced by the order of multipole deformations and orientations of nuclei. The possible role of Q value and angular-momentum effects are also considered in reference to C14 cluster radioactivity.
School-Based Drug Abuse Prevention Programs in High School Students
Journal of Alcohol and Drug Education, Dec 1, 2013
Health belief model as a theoretical framework for predicting the sleep behaviors of full-time employees
ABSTRACT
This article aimed at understanding nutritional knowledge, attitudes, and behaviors of homosexual... more This article aimed at understanding nutritional knowledge, attitudes, and behaviors of homosexual persons living with HIV/AIDS in Chongqing, China. A cross sectional design using a valid and reliable survey was used. The survey was completed in Chongqing, Southwest China (n = 172). Knowledge of nutrition was deficient regarding sources of nutrients such as calcium and iron, relationships between diet/nutrients and disease, and only 36.1% of participants knew about the Balanced Diet Pagoda for Chinese.
Decay of 176,182,188,196Pta using the Dynamical Cluster-Decay Model
CITATIONS 0 READS 71 3 authors, including:
Predictors of HPV vaccination in gay and bisexual college men
ABSTRACT
This article examined HIV/AIDS interventions targeted towards African American adolescents publis... more This article examined HIV/AIDS interventions targeted towards African American adolescents published between 1992 and 2006. Fourteen interventions met the inclusion criteria of which eight were community-based, three were family-based and three were school-based. The most common focus of interventions was in 6th through 10th grades which seems logical as the average age of initiating sexual intercourse among adolescents is 16 years and in African Americans 13 years. Most of the interventions were based on behavioral theories, with social cognitive theory being the most prevalent. Theory-based interventions were more effective than the one's that were not. The components of the interventions included culturally specific materials, African American facilitators, and gender sensitivity. HIV/AIDS knowledge, risk reduction strategies, behavioral skills, condom use, self-efficacy, decision-making and goal setting were the main foci of the interventions. Behavioral change was found in seven of the interventions. Recommendations for enhancing the success of these interventions are discussed.
J Phys D Appl Phys, 2010
In this paper detailed studies on modification of structural and magnetic properties of Ni-doped ... more In this paper detailed studies on modification of structural and magnetic properties of Ni-doped hafnium oxide (HfO 2 ) thin films are reported. We used 200 keV Ni beam for doping of Ni. For homogeneous dispersion and activation of doped Ni ions, 120 MeV Ni swift heavy ions (SHI) irradiation was used. This unique combination of Ni doping by ion beam and dispersing and activating by Ni SHI irradiation of HfO 2 films is reported for the first time. The origin of ferromagnetism in the Ni-doped HfO 2 thin films is investigated. We demonstrate the cluster free nature of our film using cross-sectional high resolution transmission microscopy and magnetization versus temperature data. Rutherford backscattering data are used to establish that Ni ions are implanted in the HfO 2 matrix at the predicted location. Dispersion of implanted Ni and lattice defects such as oxygen vacancies are attributed to be the main source of ferromagnetism. The observed magnetic moment is too large to be attributed to any secondary phase/magnetic clusters.
Review of health effects due to Benzene and Polycyclic Aromatic Hydrocarbon’s (PAH’s)
Asian Journal of Multidisciplinary Studies, Feb 27, 2015
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Papers by Manoj Kumar Sharma
Key Words: Air conditioning, CFD, GAMBIT, Temperature, Temperature distribution, Velocity.