The objective of the research is to find the best method to estimate rice crop through out evaluating the applied methods of stratified random sampling .By using different sorts of sampling estimators, a comparison was held among the variances of the mean for simple random sampling, stratified random sampling(var()) and separate regression estimator. The results indicate that the separate regression estimator give best estimations. The approximate cum.f^4/5 method was used to determine the optimum stratum boundaries, new strata was put and then var () was calculated .In comparison with strata used nowadays in central statistical organization, the new strata led to obvious decrease in the variance. The stratified mean wa

لاتخفى أهمية المادة في العمل النحتي كأحدى عناصر التكوين الفني ولم يكن غائباً في هذا المجال ما تؤديه من دور فعال في التأثير على العمل الفني, ولعلنا نعرف جيداً ان استخدامات مادة معينة تفرض علينا ان نضع في عين الاعتبار صفاتها وخواصها التركيبية, الا أنه لابد أن نعرف ما تمتلكه كل مادة من عطاءات هائلة للفن عامة والنحت خاصة وروافدها التي باتت تتكشف للفنان كل يوم بجديد عن سابقه, ولا سيما تلك المواد الطبيعية التي تملأ

                    ملخّص البحث     

   يسعى هذا البحث إلى دراسة "عمل أهل المدينة" مفهوماً واحتجاجاً وفوائدَ وتطبيقاتٍ فقهيةً. وقد اتَّخذت الدراسة منهجاً استنباطياً تحليلياً، بغية تمهيد البحث في تأصيل هذا المفهوم والتعرف على جدواه وفوائده والتماس التطبيقات الفقهية المساعدة في فهمه. وقد خلُصَتْ إلى أنَّ "عمل أهل المدينة" أطلق على الأفع

In this research, one of the nonlinear regression models is studied, which is BoxBOD, which is characterized by nonlinear parameters, as the difficulty of this model lies in estimating its parameters for being nonlinear, as its parameters were estimated by some traditional methods, namely the method of non-linear least squares and the greatest possible method and one of the methods of artificial intelligence, it is a genetic algorithm, as this algorithm was based on two types of functions, one of which is the function of the sum of squares of error and the second is the function of possibility. For comparison between the methods used in the research, the comparison scale was based on the average error squares, and for the purpose of data ge

طريقة التنفس الانفي البديل تتم عن طريق الشهيق من فتحة الانف اليسرى والزفير من اليمنى  ثم الشهيق من اليمنى والزفير من اليسرى مع تكرار العملية، واستخدم الباحث هذه الطريقة للتعرف على الاستشفاء للملاكمين بدلالة النبض خلال فترة الراحة بين الجولات، وشملت عينة البحث على ملاكمين من فئة الشباب وعددهم (9) ملاكين بمعدل اعمار (17.45) وبعد اخضاعهم الى طريقة الاستشفاء الاعتيادية وطريقة التنفس الانفي البديل خلال الراحة ب

The grey system model GM(1,1) is the model of the prediction of the time series and the basis of the grey theory. This research presents the methods for estimating parameters of the grey model GM(1,1) is the accumulative method (ACC), the exponential method (EXP), modified exponential method (Mod EXP) and the Particle Swarm Optimization method (PSO). These methods were compared based on the Mean square error (MSE) and the Mean Absolute percentage error (MAPE) as a basis comparator and the simulation method was adopted for the best of the four methods, The best method was obtained and then applied to real data. This data represents the consumption rate of two types of oils a heavy fuel (HFO) and diesel fuel (D.O) and the use of tests to conf

Abstract: Recently, there is increasing interest in using mode-division multipelexing (MDM) technique  to enhace  data rate transmission over multimode fibers.  In this technique, each fiber mode is treated as a separate optical carrier to transfer its own data.  This paper presents a broadband, compact, and low loss three-mode (de)multiplexer designed for C+L band using subwavelength grating (SWG) technology and built-in silicon-on-insulator SOI platform. SWG offers refractive index engineering for wider operating bandwidth and compact devices compared to conventional ones. The designed (de)multiplex deals with three modes (TE0, TE1, and TE2) and has a loss > -1 dB and crosstalk < −15 dB, and its operation c

Deep convective clouds tend to exert large but compensating effects in the shortwave and longwave that largely cancel, leading to a muted effect on net cloud radiative effect. Multi-layered cloud systems, ubiquitous in both hemispheres, exert strong cooling influence on Earth of around 6.1 W m-2.

The current study dealt with anatomical aspects of species Iresine herbstii Hook.ex Lindl. which is the only species resemble the genus Iresine P.Br in Iraq . This species is considered as a new record in Iraq as it wasn’t mentioned within any resource of Iraqi plants. The study included anatomical characteristics of different parts of plants which are root, stem, petiole leaf and sepals. Also the type of venation was investigated , the shape and of seed Surface configuration . The results of the mentioned study of the parts as having important anatomical characteristics for the transvers and vertical sections in them, it also included a study of their tissues, where the root and stem sections appeared as circular, whereas petiole section

According to the circumstances experienced by our country which led to Occurrence of many crises that are the most important crisis is gaining fuel therefore, the theory of queue (waiting line) had been used to solve this crisis and as the relevance of this issue indirect and essential role in daily life.