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The adult female of Otopheidomenis zalelestes is redescribed and illustrated with many photographs based on three non-paratype females collected by Treat in 1955 and in 1966 on museum-preserved specimens of a female and male of the noctuid moth Zale lunata Drury that were donated to the author's collection by Treat decades ago. The chaetotaxy of genua and tibiae I-IV and several other details, including the sigilla and distance measurements between the paired dorsal idiosomal setae never discussed before, are included. These are compared with several paratype females of this species borrowed from the Ohio State University Acarology Laboratory (OSAL), Columbus, OH. This included a female showing the tubular laelapid type insemination system (spermatheca) and a male showing the spermatodactyl and basifemur of leg II showing a hump-like projection having a tiny seta on it which are described and illustrated.
Keywords: Chaetotaxy, Noctuidae, O. zalelestes, redescription, spermatodactyl, Zale -
International Journal of Horticultural Science and Technology, Volume:10 Issue: 4, Autumn 2023, PP 421 -432
Biochemical diversity may result from geographic and environmental changes. In the present study, 16 ecotypes of yellow flag species were identified and collected through field studies. The identified ecotypes were then grouped into three populations based on their geographical locations. Eight biochemical properties, including chlorophyll a, chlorophyll b, total chlorophyll, carotenoids, phenol and flavonoid content, antioxidant capacity, and anthocyanin, were carefully measured by spectrophotometric methods. The biochemical traits were analyzed in a completely randomized design with three replications using SAS software and principal component analysis using SPSS software. The analysis of variance showed that all biochemical traits studied in the ecotypes of the yellow flag showed significant differences (p<0.05; p<0.01). Photosynthetic pigments were most frequently found in ecotype Q, phenol and flavonoids of ecotype K, ecotype O's antioxidant capacity, and ecotype L's anthocyanin content. The studied populations were divided into three main groups using cluster analysis. The results obtained from the correlation table of traits show that the most positive and significant correlations are related to chlorophyll a and total chlorophyll (r = 90%), total chlorophyll and carotenoids (r = 67%), as well as phenol content and flavonoid content (r = 56 %). The results indicate that the studied ecotypes have considerable diversity in terms of biochemical traits.
Keywords: Anthocyanin, Cluster Analysis, Genetic Resources, flavonoids, phenol -
Aims
The objective of this study was to identify operators' error in distillation units of Isfahan oil refinery.
Materials and MethodsData were collected through task observation and interviewing with safety authorities, the unit and the shift supervisors and operators to identify and analyze critical tasks hierarchically (hierarchical task analysis). Then, human errors of each critical task were identified using systematic human error reduction prediction approach (SHERPA) technique.
ResultsAnalysis of the SHERPA work sheets revealed 198 human errors of which 134 (67.64%), 23 (11.61%), 11 (5.6%), 24 (12.12%), and 6 (3.03%) were action, checking, communication, retrieval, and selection errors, respectively. Critical tasks of "performance monitoring" and "communication" were the main tasks of control room operators (C.R.O's). Low occurrence probability and medium occurrence probability were estimated 64% and 36%, respectively. Furthermore, 59% of the identified errors of C.R.O's had no required recovery of which only 29% had critical consequences.
ConclusionsThe results showed SHERPA technique can be used as an effective technique to detect human errors in petrochemical and oil refineries.
Keywords: Human error, oil refinery, operator, systematic human error reduction prediction approach technique -
هدف
پژوهش حاضر باهدف بررسی فریب کاری های آموزشی وتقلب دانشجویان در چارچوب یک مدل علی بانظر گرفتن متغرهای دینی واخلاقی انجام یافت.
مواد و روش هاشرکت کنندگان پژوهش شامل 300 نفر(134پسر و 166دختر)دانشگاه شیراز بوده که پرسشنامه-های دینداری گلاک و استارک، مقیاس بی صداقتی تحصیلی مک کابی و تروینییو، پرسشنامه هدف گرایی تحصیلی بوفارد و همکاران و پرسشنامه جهت گیری اخلاقی میلتیادیس را تکمیل کردند. داده ها با استفاده از روش مدل-یابی معادلات ساختاری بوسیله نرم افزار Amos نسخه22 مدل مورد تحلیل قرار گرفت.
یافته هایافته ها نشان داد که هرسه متغیر پایبندی به دین، هدف گرایی تحصیلی و جهت گیری هدف پیش بین منفی بی صداقتی تحصیلی می باشند. همچنین بین متغیرهای پایبندی به دین و هدف گرایی تحصیلی و بین متغیر پایبندی به دین و جهت گیری اخلاقی رابطه مثبتی برقرار است. ضرایب مسیر برای متغیر پایبندی به دین و بی صداقتی تحصیلی6/- متغیر پایبندی به دین و جهت گیری اخلاقی91/0 متغیر پایبندی به دین و هدف گرایی تحصیلی94/0 متغیر جهت گیری اخلاقی به بی صداقتی تحصیلی 35/- و متغیر هدف گرایی تحصیلی به بی صداقتی تحصیلی 0.58- بدست آمد که همگی در سطح01/ معنادار بود.
نتیجه گیریبطورکلی می توان نتیجه گرفت اعتقادات مذهبی دانشجویان، پایبند بودن به ارزش های اخلاقی و همچنین داشتن هدف و انگیزه در تحصیلی در اجتناب از تقلب در تحصیل و همچنین صداقت داشتن موثر است
کلید واژگان: بی صداقتی تحصیلی, پایبندی به دین, جهت گیری اخلاقی, هدف گرایی تحصیلیPurposeThe present study was conducted with the aim of investigating educational cheating and student cheating in the framework of a causal model considering religious and moral variables.
Materials and methodsThe participants of the research included 300 people (134 boys and 166 girls) from Shiraz University, who used Gluck and Stark religiosity questionnaires, McCabe and Treviño's academic dishonesty scale, Boffard et al.'s academic goal orientation questionnaire, and Miltiadis' moral orientation questionnaire. completed The data was analyzed using structural equation modeling method by Amos software version 22.
FindingsThe findings showed that all three variables of adherence to religion, academic goal orientation and goal orientation are negative predictors of academic dishonesty. Also, there is a positive relationship between the variables of adherence to religion and academic goal orientation, and between the variables of adherence to religion and moral orientation. Path coefficients for the variable of adherence to religion and academic dishonesty - 6/, the variable of adherence to religion and moral orientation 0.91, the variable of adherence to religion and academic goal orientation 0.94, the variable of moral orientation to academic dishonesty - 35/ and the variable of academic goal orientation to Academic dishonesty was found to be -0.58, all of which were significant at the 01/ level.
ConclusionIn general, it can be concluded that students' religious beliefs, adherence to moral values, and having a goal and motivation in education are effective in avoiding cheating in education, as well as being honest
Keywords: academic dishonesty, Adherence to Religion, Moral Orientation, Academic Goal Orientation -
بخش حمل ونقل به عنوان یکی از عمده ترین مصرف کننده ی سوخت های فسیلی، نقشی اساسی در انتشار آلاینده های زیست محیطی دارد. این بخش در فرایند ارائه ی خدمات علاوه بر ستانده های مطلوب)جابه جایی بار و مسافر(،ستانده های نامطلوب)آلاینده های زیست محیطی(نیز ایجاد می کند. با توجه به نظریه ی پیگو، هر آلوده گر باید هزینه های آلایندگی خود را بپردازد، در این نوشتار با توجه به وجود کمبودها در زمینه ی روش های مناسب تحلیلی برای سیاست گذاری در زمینه ی محیط زیست، قیمت های سایه یی آلاینده های زیست محیطی که در اثر سوخت های فسیلی مصرف شده در بخش حمل ونقل منتشر می شوند، برآورد شده است. نتایج حاصله حاکی از آن است که قیمت سایه یی آلاینده های زیست محیطی که از مصرف هر لیتر بنزین و نفت گاز ایجاد می شود، به ترتیب 1039 ریال و 1075 ریال است.
کلید واژگان: قیمت سایه, هزینه های خارجی, آلاینده های زیست محیطی, سوخت های فسیلی حمل و نقلTo scientists of the natural sciences, in general, and to those of the environmental sciences, in particular, pollution is waste, resulted from economic activities and disposed into the environment. In other words,pollution is the result of an incomplete production/consumption process, wherein production elements are made into a product. Pollution can be divided into two main groups, namely ``flow pollution'' and ``stock pollution''. Flow pollution occurs when the damage (loss) is related to the ``amount'' of emission. In other words, emission of the pollutants into the environment happens with the passage of time. In this kind of pollution, if the flow stops, the related costs tend to zero immediately. The damage (loss) of this kind of pollution at any time depends on its present rate of emission. In stock pollution, the damage (loss) is a function of the amount of pollutants stocked in the environmental system at any time. The loss (damage) due to the pollutants stocked in the environment is more than that of those in nature.The transportation sector, being a main consumer of fossil fuels, plays a basic role in the emission of environmental pollutants. In the process of giving service, this sector creates undesirable outputs (environmental pollutants), in addition to desirable ones (cargo and passenger transfer). Considering the Pigo theory, which says that every polluter should pay the cost of his polluting behavior, and also the scarcity of appropriate analytical methods for the purpose of environmental policy making, an effort has been made, in this paper, to estimate shadow prices or final external costs of environmental pollutants created by fossil fuel consumption in the transportation sector. Results have revealed that the shadow prices of environmental pollutants per liter of consumed gas or gasoil, are 1039 and 1075 Rials, respectively. Therefore, based on Pigo's theory (a polluter should pay for his pollution), it is suggested that the compensation taken from the polluter be based on the shadow prices estimated in the present research, so that it can offset the damage (loss). In this study, the shadow price of all environmental pollutants caused by gas and gasoil consumed in the transportation sector has been estimated as a whole. Therefore, it is suggested that these pollutant's shadow prices be calculated separately (in other research), so that a comparison between them becomes possible.
Keywords: Shadow Price, External Costs, Environmental Pollutants, Transportation Fossil Fuels -
طراحی و شبیه سازی یک سیستم میکروسیالی نوین برای انتخاب و پالایش اسپرم پویا با استفاده از الکتروفرسیساز آن جاکه پویابودن یک پارامتر مهم در تعیین کیفیت اسپرم است، عملیاتی که بتواند اسپرم های پویا را به بهترین شکل و کمترین خطر جدا کند، برای درمان ناباروری مطلوب است. در میان راه های مختلف برای جداسازی و سرندکردن اسپرم های پویاتر، روش هایی که از میکروکانال استفاده می کنند، از نظر سادگی و کاربرپسندی و سازگاری با طبیعت از دیگر روش ها پیش افتاده تر هستند. سئو و همکاران (2007) سیستمی را طراحی کرده اند که متشکل از چهار کانال و سه مخزن است. در این طراحی جریان موجود در کانال ها با استفاده از فشار هیدرواستاتیک، ناشی از ارتفاع سیال در مخازن، تولید می شود و با ایجاد یک جریان معکوس در کانال اصلی فقط به اسپرم های پویا اجازه ی شنا در خلاف جهت جریان داده می شود. در این پژوهش، سیستم طراحی شده توسط سئو با استفاده از نرم افزار گمبیت شبکه بندی و به وسیله ی نرم افزار فلوئنت تحلیل شده است. ابتدا، نتایج سئو اعتبارسنجی شده و سپس اندازه ی مناسب میکروکانال ها انتخاب شده که طول کانال اصلی برابر m m 5 پیشنهاد شده است. همچنین با استفاده از این سیستم بهینه شده و مبانی الکتروفرسیس، سیستم میکروسیالی متشکل از یک میدان الکترواستاتیک و سیستم چهارکاناله به منظور جداسازی و پالایش اسپرم های پویا طراحی شده است.کلید واژگان: اسپرم, اسپرم پویا, جداسازی اسپرم, میکروسیال, میکرواینجکشنDifferent studies show that at least half of the couples referring for infertility investigation and treatment have a causative male factor. Male factor infertility can be caused by a variety of defects, e.g., abnormal sperm amount, morphology abnormality, or low functionality. In all cases where the sperm cannot reach the ovum, Iin Vitro Fertilization (IVF) technique can be used for fertility. Separation of motile sperms from non-motile ones is essential in some infertility treatments such as intracytoplasmic sperm injection ( ICSI) and in vitro fertilization. Motility is one of the most important parameters in sperm quality, the effective and safe operations are more desirable in such treatments. The ideal sperm separation technique should be easy, low-cost, separate many sperms as possible, not damage the sperms, not cause physiological transformation, eliminate dead sperms and also other cells, allow for analyzing larger volumes of ejaculates, reduce the risk of reactive oxygen species and not having toxins for spermatozoa. In addition, after the separation step, spermatozoa must be viable and be able to fertilize the egg. Sperm morphology is directly related to the successful process. A system that selects the best sperms for fertilization can help to increase the rate of birth. In addition, sperm separation is a basic step in the IVF process. Several methods for motile sperm separation have been reported, including : Sperm washing, Sperm migration, Sperm sedimentation, Filtration, Density gradient centrifugation, Sperm surface charge for sperm selection(electrophoresis & zeta), Magnetic-activated cell sorting (MACS), Hyaluronic acid sperm binding, Raman spectroscopy, Confocal light absorption and scattering microscopy (CLASS), and Selection based on live sperm morphology. Sperm migration and movement from one point to another, is one of the sperm separation methods. Migration method, as a method to separate motile sperms, is used as an ideal experimental sperm selection method. One of the emerging systems used for motile sperm separation is sperm separation microfluidic system. among methods of motile sperm selection, the ones which use micro channels go beyond others in simplicity, user-friendliness, and similarity to the physiological environment. Among methods of motile sperm selection, the ones which use micro channels go beyond others in simplicity, user-friendliness, and similarity to the physiological environment. Seo et al. (2007) designed a motile sperm sorting microfluidic system (MSMS) consisting four channels and three reservoirs. The flow in channels is created by hydrostatic pressure of columns at the liquid reservoirs. In this system, a reverse stream is flowing and only motile sperms are able to swim against the flow. In this paper, we will simulate and develop the MSMS micro fluidic device previously reported by Seo. After validation, with Seo's results, we optimize the size of micro channels. The results will be useful in sperm sorting applications. In addition, in this research, by the use of the optimized system and electrophoresis based concepts, microfluidic system, consisting of a electrostatic field and optimized TRMS system, is designed for separation and selection motile sperms.Keywords: S?p?e?r?m, m?o?t?i?l?e s?p?e?r?m, s?p?e?r?m s?e?p?a?r?a?t?i?o?n, m?i?c?r?o?f?l?u?i?d?i?c, m?i?c?r?o i?n?j?e?c?t?i?o?n
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امروزه برای تبدیل خواسته های مشتریان به مشخصه های فنی محصول از رویکرد گسترش عملکرد کیفیت یا گسترش کارایی کیفی (Q F D) به طور وسیعی استفاده می شود. در این رویکرد رتبه بندی و وزن دهی صحیح هریک از خواسته های مشتریان حائز اهمیت است، چرا که این امر بر ارزش نهایی مشخصه های فنی محصول تاثیر خواهد گذاشت. هر فرد تصمیم گیرنده درک متفاوتی از ارزیابی متغیرهای زبانی در محیط فازی دارد، هدف از این تحقیق روش جدید وزن دهی به خواسته های مشتریان و مشخصه های فنی براساس اطلاعات رقبا و ارائه ی روش سیستماتیک Q F D فازی است. موفقیت یک محصول نه تنها به مطابقت با نیازهای شتریان، بلکه به مقایسه و ارزیابی محصولات رقبا نیز بستگی دارد. اکثر روش های پیشین تنها بر دیدگاه مشتری متمرکز بوده و از محیط رقابتی چشم پوشی کرده اند. روش پیشنهادی شامل موقعیت رقبا، وزن دهی متفاوت مشتریان گوناگون، عملکرد فعلی و نظر مشتریان به درک های متفاوت از متغیرهای زبانی،درنظر گرفتن سقف خانه ی کیفیت فازی، به علاوه استفاده از ریاضیات فازی به جای اعداد قطعی در مقایسه با روش های قبل است. این روش می تواند بهترین استراتژی طراحی محصول را در اختیار سازمان قرار دهد.
کلید واژگان: گسترش عملکرد کیفیت, خانه کیفیت فازی, ندای مشتری, محیط رقابتی, قاعده ی پارتو, آنتروپیIn a competitive environment, quality and price have an important role to play in the production of commodities. For this purpose, increasing the quality at a reasonable price is the first and most important issue for achieving a share in the market. Quality Function Deployment (QFD) has been one of the most successful tools for this purpose, for some years. Using QFD, we design and produce the finished goods or services which satisfy the needs of the customers. In fact, QFD transforms the needs of the customer to the technical characteristics of the product. However, usually, customer needs are presented in the form of subjective and verbal statements, which causes a reduction in the effectiveness of the questioners who are determining customer needs. The fuzzy approach has solved this problem. During the construction of QFD, using fuzzy numbers instead of crisp numbers, better results will be obtained. Fuzzy logic shows a range for each customer idea. Comparing the crisp with the fuzzy numbers, crisp numbers only identify one point in a wide range of possibilities. These issues are more highlighted when customer beliefs regarding one issue may be quite different from another.In this paper, all these possibilities are considered when the fuzzy environment for projecting the view of the customers is considered. First, the fuzzy environment and the house of quality are introduced. Then, a complete example, concerning the house of quality matrix as the most important factor in QFD, is presented.After determination of the technical characteristics of the product, the most important, determined by Pareto's law, are transmitted to the next step, which is the designing of the product. With emphasis on these important characteristics, by using fuzzy numbers for projecting the view of customer needs and by improving the design of the product based on them, we can be sure that customer satisfaction will be improved.Keywords: Quality function deployment, Fuzzy house of quality, Customer, Competition, Pareto's law
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از آنجا که گزینه «جستجوی دقیق» غیرفعال است همه کلمات به تنهایی جستجو و سپس با الگوهای استاندارد، رتبه‌ای بر حسب کلمات مورد نظر شما به هر نتیجه اختصاص داده شده‌است.
- نتایج بر اساس میزان ارتباط مرتب شده‌اند و انتظار می‌رود نتایج اولیه به موضوع مورد نظر شما بیشتر نزدیک باشند. تغییر ترتیب نمایش به تاریخ در جستجوی چندکلمه چندان کاربردی نیست!
- جستجوی عادی ابزار ساده‌ای است تا با درج هر کلمه یا عبارت، مرتبط ترین مطلب به شما نمایش داده‌شود. اگر هر شرطی برای جستجوی خود در نظر دارید لازم است از جستجوی پیشرفته استفاده کنید. برای نمونه اگر به دنبال نوشته‌های نویسنده خاصی هستید، یا می‌خواهید کلمات فقط در عنوان مطلب جستجو شود یا دوره زمانی خاصی مدنظر شماست حتما از جستجوی پیشرفته استفاده کنید تا نتایج مطلوب را ببینید.
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همراه با متن7
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علمی7
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معتبرحذف فیلتر
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