For n particles, the original code requiresO(n) time because at each time step, the apply force function is called for each particle (to be updated) with each other particle. Since interactions are local, one particle is influenced by a few nearby particles. Thus, most of the time, the apply force function is computing a distance and returning after finding this distance to be greater than the ...

the aim of the present study was to prepare an oral tablet from liquid yogurt by reforming the physical properties for easy transportation, long-term storage and also as a complementary dairy product in case of nutrient deficiency. the liquid fresh yogurt was lyophilized at -40°c and 0.03 mtor pressure. the dry powder was homogenized by a 12 mesh size sieve. some tests such as carr’s compressib...

this paper discusses about preparation of biodegradable polymer /clay nanocomposites based on organically modified montmorillonite clay; i.e. cloisite 10a and biodegradable polymer chitosan by solution mixing technique and their characterization. the nanocomposites were successfully prepared and their structures were characterized by powder x-ray diffraction (xrd), particle size analyzer (beckm...

The main aim of the study was to determine chemical, optical and physical characteristics of aerosol particles responsible for visibility degradation in Yosemite National Park. The park, located in the central Sierra Nevada range in eastern California, was impacted by smoke from wildfire activity in the western United States. Determining the contribution made by smoke to visibility degradation ...

background:  the prevalence of obesity in the elderly is increasing worldwide. obesity greatly impacts quality of life(qol). the present study aimed to investigate the association between obesity and qol among the elderly, in tehran, iran. methods:  this cross-sectional study (observational) was conducted in 2014 in tehran, iran. a total of 421 elderly people aged ≥ 60 years old were recruited ...

groundwater is the most widely distributed resource of the earth and groundwater quality evolves rapidly as it passes through the subsurface pathways within the unsaturated zone. increasing urbanization and anthropogenic activities have added to the problem of deficient amount of good quality groundwater. the study area is an industrial hub for textile sector. textile production, particularly d...

statement of the problem malocclusion is a developmental problem, which results in social, psychological and functional problems for patients purpose the aim of this study was to evaluate the need for orthodontic treatment using the index of orthodontic treatment need (iotn) among the 11‒14-year-old students of hamadan schools in 2010 and to find the correlation between dental health component ...

An experiment set-up is used to study wall deposition rate of particles on a rough surface in a turbulent channel flow. Deposition velocities for three classes of particles, namely, spherical glass particles, irregular shape polymer particles, and fibrous silicon particles are studied. The particle concentration at the test section was measured with the aid of an isokinetic probe in conjunction...

A sharply focused laser is able to trap small particles at the laser focal point due to the difference in refractive index of the particles and that of the surrounding medium. This technique, called laser trapping, can be used to manipulate animal or bacterial cells without any contact and has been widely applied in biological research. However, it has been difficult to trap biological macromol...

background and purpose: in people wearing dentures, the growth of various candida species under the prosthesis leads to the formation of biofilm, which can play the role of a reservoir for candida and other kinds of microbes. since nano-chitosan particles can cause lasting antimicrobial activity, a more recent approach that utilizes acrylic resins with nano-chitosan particles is proposed. there...