Geometrical design of stand pipe air distributors for the combustion of municipal solid waste in a fluidised bed

The new geometrical design of stand-pipe air distributor for the combustion of the municipal solid waste was presented. The new design of the air distributors enables penetration of incombustible and unburnt carbon through opening between the air distributors, thus providing easy maintenance work. The fluidized bed experimental rig was constructed using Perspex column in which air was supplied through the distributors below it. In order to establish the final geometrical design of the air distributors, several design parameters were investigated. The effect of orifice size, distance between orifice and distance between distributor pipes on the fluidization behaviour were studied. Investigation on the effects of various orifice sizes of 1.5 mm, 2 mm, 3 mm, 4 mm and 5 mm showed that the 3 mm orifice size exhibited the most stable fluidization behaviour. Investigation on some selected orifice distances of 10 mm, 20 mm, 30 mm and 40 mm also found that the 10 mm orifice distance exhibited stable growths of bubbles. Various pipe distances of 30 mm, 40 mm, 50 mm, 60 mm and 70 mm were also investigated and the most suitable pipe distance was 70 mm

Some New Fixed Point Theorems in Weak Partial Metric Spaces

          الهدف الرئيسي لهذا البحث هو استعراض ودراسة بعض النقاط الصامدة للدوال التي تحقق الشرط    في الفضاءات المترية الجزئية الضعيفة وتم إعطاء بعض التعميمات الجديدة لمبرهنات النقطة الصامدة لكل من ماثيوس وهيكمان. ان اهم النتائج التي حصلنا عليها هي توسيع وتوحيد العديد من النتائج في مبرهنات النقطة الصامدة وتعميم بعض النتائج الحديثة في الفضاء المتري الجزئي الضعيف كما اعطينا مثال لتوضيح نتائجنا.The main objective of this work is to introduce and investigate fixed point (F. p) theorems for maps that satisfy contractive conditions in weak partial metric spaces (W.P.M.S), and give some new generalization of the fixed point theorems of Mathews and Heckmann. Our results extend, and unify a multitude of (F. p) theorems and generalize some results in (W.P.M.S). An example is given as an illustration of our results

Benzodiazepine self-poisoning in Pakistan: implications for prevention and harm reduction

The pattern of all index admissions for benzodiazepine self-poisoning to a university hospital in Karachi, Pakistan are described. Of the 329 medication self-poisoning cases, 84% were benzodiazepine overdoses. Diazepam was the preferred drug in 69% of these cases, with majority ingesting between 20-30 tablets of 5 mg each, 44% bought the benzodiazepine over the counter (OTC) for the purpose of overdose. The preference for benzodiazepines over analgesics (as freely available) may be related to the motives underlying parasuicide acts and their popularity as \u27sleeping pills\u27 in Pakistan. Educating the \u27chemist\u27 and limiting the number of tablets dispensed at a time are areas to consider in reducing the incidence and harmful effects of benzodiazepine overdoses in Pakistan

Beyond static structures of RNA by NMR: Folding, refolding, and dynamics at atomic resolution

No abstract.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/56043/1/20754_ftp.pd