Asymptotic Behavior of Solutions for the Cauchy Problem of a Dissipative Boussinesq-Type Equation

We consider the Cauchy problem for an evolution equation modeling bidirectional surface waves in a convecting fluid. Under small condition on the initial value, the existence and asymptotic behavior of global solutions in some time weighted spaces are established by the contraction mapping principle

Applied optimal shape design

AbstractThis paper is a short survey of optimal shape design (OSD) for fluids. OSD is an interesting field both mathematically and for industrial applications. Existence, sensitivity, correct discretization are important theoretical issues. Practical implementation issues for airplane designs are critical too.The paper is also a summary of the material covered in our recent book, Applied Optimal Shape Design, Oxford University Press, 2001

Sugarcane mosaic virus: The causal agent of mosaic disease on sorghum (Sorghum bicolor L.) in Tehran province of Iran

During disease diagnosing studies on sorghum fields in Tehran province, Iran through vegetation period in 2005 - 2006, 75 sorghum expressing virus-associated symptoms including mosaic, leafredding and necrosis were collected. The virus was inoculated mechanically to Sweet corn (Zea mays cv. Pars403) and grain sorghum (Sorghum bicolor cv. Kimia). The virus specifically was reacted in Double Antibody Sandwich-Enzyme Linked Immunosorbent Assay (DAS-ELISA) and Dot Immunobinding Assay (DIBA). Also relative molecular mass of virus coat protein was calculated using adensitometer via sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) to determine electrophoretic mobility compared with protein standards. The virus reacted with anti SCMV polyclonal IgG antiserum and was detected with Goat anti-Rabbit IgG alkaline phosphatase conjugate. The total nucleic acids were subjected to reverse transcription-polymerase chain reaction (RT-PCR) using SCMV degenerate and specific primers. Sugarcane mosaic virus (SCMV) was detected in allcollected samples. The capsid protein was evaluated approximately 37 kDa in size. Amplification product (approximately 900 bp) was obtained from the collected and inoculated plants but not from healthy plants. This may confirm the presence of SCMV in the symptom-expressing plants

Modelling the dynamics of turbulent floods

Consider the dynamics of turbulent flow in rivers, estuaries and floods. Based on the widely used k-epsilon model for turbulence, we use the techniques of centre manifold theory to derive dynamical models for the evolution of the water depth and of vertically averaged flow velocity and turbulent parameters. This new model for the shallow water dynamics of turbulent flow: resolves the vertical structure of the flow and the turbulence; includes interaction between turbulence and long waves; and gives a rational alternative to classical models for turbulent environmental flows

Correlation of quality of sleep or quality of life and some of blood factors in hemodialysis patients

چکیده: زمینه و هدف: علی رغم پیشرفت‌های زیادی که در درمان بیماری نارسایی مزمن کلیه صورت گرفته کیفیت زندگی به عنوان یک مشکل بزرگ در این گروه از بیماران به مخاطره افتاده است. با توجه به شیوع بالای اختلال خواب و مشکلات وابسته به آن در بیماران دیالیزی، این مطالعه با هدف بررسی ارتباط بین کیفیت خواب، کیفیت زندگی و بعضی فاکتورهای خونی در بیماران تحت درمان با همودیالیز نگهدارنده انجام شد. روش بررسی: این پژوهش یک مطالعه توصیفی- تحلیلی است که در 85 بیمار تحت درمان با همودیالیز نگه دارنده در سال 84- 83 انجام گرفته است. نمونه ها از بخش های همودیالیز سه بیمارستان آموزشی وابسته به دانشگاه علوم پزشکی تهران و ایران و براساس نمونه گیری مبتنی بر هدف انتخاب شدند. کیفیت خواب با استفاده از پرسشنامه کیفیت خواب پیتس برگ (PSQI) و کیفیت زندگی با استفاده از پرسشنامه کوتاه 36 سوالی (SF36) اندازه‌گیری شد. جهت تجزیه و تحلیل داده ها از آزمون های آماری t، من ویتنی، کای دو، تست دقیق فیشر و ضریب همبستگی اسپیرمن استفاده شد. یافته ها: 63 بیمار (71) کم می خوابیدند (نمره کل کیفیت خواب بیشتر از 5 بود). ابعاد روانی (MCS) و ابعاد فیزیکی (PCS)، ‌ارتباط معکوسی با نمره کل کیفیت خواب داشت (01/0

Self-burning: A common and tragic way of suicide in fars province, Iran

Self-burning is the most devastating burn injury. It is a common social and medical problem in Iran. In a longitudinal prospective study, from April 2003 to March 2006, all burn patients admitted to Ghotb-eddin burn Hospital were enrolled in this study. Suicide attempts by burning accounted for 283 (21.9%) of all burn patients admitted to the hospital. Most (68.2%) of self-burning patients were female. Self-burn patients had significantly large burned body surface area (64.8±29%). Suicidal burns occurred predominantly in the age group 15-24 years (44.6%). The mortality rate for suicidal burns was (60.4%). Fars is a province composed of many different tribes and cultural minorities whereby major decisions are made by forums of clergymen. It is important to involve those clergymen in burn prevention programs to achieve a meaningful reduction in Self-burning prevalence

The effect of dietary regimen education on the laboratory variables and interdialytic weight gain in hemodialytic patients

چکیده: زمینه و هدف: تغذیه یک فاکتور مهم در درمان بیماران مبتلا به بیماری مزمن کلیوی می باشد، به طوری که رژیم غذایی نامناسب باعث کاهش کیفیت زندگی و افزایش مشکلات و ناخوشی و مرگ و میر در این بیماران می شود. این پژوهش با هدف بررسی تأثیر آموزش رژیم غذایی بر شاخص های آزمایشگاهی و اضافه وزن بین دو جلسه دیالیز در بیماران تحت درمان با همودیالیز نگه دارنده انجام شد. روش بررسی: یک مطالعه قبل و بعد که در یک گروه به صورت پیش آزمون - پس آزمون در بیمارستان های آموزشی منتخب دانشگاه های علوم پزشکی تهران و ایران انجام گرفت. 32 بیمار تحت درمان با همودیالیز نگه دارنده بصورت غیر تصادفی و مبتنی بر هدف انتخاب گردیدند و با استفاده از پرسشنامه تعیین نیازهای آموزشی مورد بررسی قرار گرفتند. شاخص های آزمایشگاهی به صورت میانگین دو ماهه قبل از آموزش و اضافه وزن بین دو جلسه دیالیز در 4 نوبت در طی دو هفته قبل از آموزش اندازه گیری شد. سپس یک برنامه آموزشی بر اساس مشکلات تعیین شده و الگوی خود مراقبتی اورم تدوین و در طی چهار جلسه 20 دقیقه ای در روزهایی که بیماران دیالیز نمی شدند، به صورت پرسش و پاسخ بین بیماران و آموزش دهنده با کمک وسایل کمک آموزشی (اورهد و پاورپوینت) ارائه گردید. بعد از پایان آموزش، شاخص های آزمایشگاهی به صورت میانگین دو ماهه بعد از آموزش و اضافه وزن بیماران در 4 نوبت به فاصله دو هفته بعد از آموزش (هفته های سوم و پنجم) اندازه گیری و با استفاده از آزمون t زوجی تجزیه و تحلیل شدند. یافته ها: نتایج نشان دهنده کاهش قابل توجهی در میزان اوره (001/0

Effects of different starter diets on growth indices of Caspian Kutum, Rutilus frisii kutum larvae

Six different diets including two rainbow trout starters, Gammarus dry powder, shrimp dry powder, egg yolk dry powder and newly hatched Artemia were used in feeding of Caspian Kutum larvae. During a 4-week trial, larvae with a mean weight of 17.5 ± 4.7 mg were fed with three replicates and growth parameters were measured at the end of the experiment. Thirty fish in each experimental unit with 3 L volume were fed 6 times daily according to their satiation. Results showed that there were significant differences in the final weight, final length, body weight increase, voluntary feed intake and specific growth rate for weight and length among the treatments (P0.05). The best performance was observed in fish fed Artemia nauplii. The survival rate was significantly different among the treatment (P<0.05) which the highest (75.6 ± 3.8%) and lowest (22.2 ± 11.7%) were observed in fish fed Artemia nauplii and Coppens, respectively. According to obtained results, it appears that except Artemia, the most suitable and inexpensive diet is egg yolk powder, which can results in high growth performance and survival rates. The results of this study suggested that using dry non-live diets with good composition could be replaced with Artemia that had suitable growth and survival rate in Caspian Kutum during larval 0

Einstein-Born-Infeld on Taub-NUT Spacetime in 2k+2 Dimensions

We wish to construct solutions of Taub-NUT spacetime in Einstein-Born-Infeld gravity in even dimensions. Since Born-Infeld theory is a nonlinear electrodynamics theory, in leads to nonlinear differential equations. However a proper analytical solution was not obtain, we try to solve it numerically (by the Runge-Kotta method) with initial conditions coinciding with those of our previous work in Einstein-Maxwell gravity. We solve equations for 4, 6 and 8 dimensions and do data fitting by the least-squares method. For N=l=b=1, the metric turns to the NUT solution only in 8 dimensions, but in 4 and 6 dimensions the spacetime does not have any Nut solution.Comment: 8 pages, 5 figure