bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pengaruh Metode Pembelajaran dan Gaya Kognitif terhadap Hasil Belajar Matematika dengan Mengontrol Kemampuan Awal: Study Eksperimen di MAN 2 Kota Bekasi
Authors: Hanun Farida 
Published: December 2018

AbstractThis research aims at testing an influence of learning process and cognitive style against the math learning outcome by considering initial competency. The research was conducted at MAN (Islamic State Senior High School) 2 of Bekasi City on the semster 1 of the academic year 2009-2010, with sample of 52 students. This research applies an experiment method on Treatment by level design 2x2 and analysis data by applying Covariant Analysis (ANCOVA) at a significant level α = 0,05.The research outcome shows that: 1) Math learning outcome between student group given by a discussion learning method is higher than the student group given by the conventional learning method, 2) Interaction influence between the learning method and cognitive style against the Math learnong outcome, 3) For the students group which has an independent cognitive field, the Math learning outcome between the student group given by the discussion learning method is higher than the student group given by the conventional learning method, 4) This research outcome does not support any hypothesis trueness proposed which is for the student group who has independent cognitive field style, the Math outcome between the student group given by the discussion learning meyhod is lower than the student group given by the conventional learning method. AbstrakPenelitian ini bertujuan untuk menguji pengaruh metode pembelajaran dan gaya kognitf terhadap hasil belajar matematika dengan memperhitungkan kemampuan awal. Penelitian dilakukan di MAN 2 Kota Bekasi pada semester 1 tahun pelajaran 2009-2010, dengan sampel sebanyak 52 siswa. Penelitian ini menggunakan metode eksperimen dengan Treatment by level design 2x2 dan data di analisis dengan menggunakan Analisis Covarians (ANCOVA) pada level signifikan α = 0,05.Hasil penelitian menunjukkan bahwa: 1) Hasil belajar Matematika antara kelompok siswa yang diberi metode pembelajaran diskusi lebih tinggi dibandingkan kelompok siswa yang diberi metode pembelaaran konvensional, 2) Terdapat pengaruh interaksi antara metode pembelajaran dan gaya kognitif terhadap hasil belajar Matematika, 3) Untuk kelompok siswa yang memiliki gaya kognitif field independent, hasil belajar Matematika antara kelompok siswa yang diberi metode pembelajaran diskusi lebih tinggi dibandingkan kelompok siswa yang diberi metode pembelajaran konvensional, 4) Hasil penelitian ini tidak mendukung kebenaran hipotesis yang diajukan yaitu untuk kelompok siswa yang memiliki gaya kognitif field dependent, hasil belajar Matematika antara kelompok siswa yang diberi metode pembelajaran diskusi lebih rendah dibandingkan kelompok siswa yang diberi metode pembelajaran konvensional.
PERANCANGAN BOOST CONVERTER DENGAN LDR SEBAGAI PENGENDALI SINYAL PWM UNTUK MENAIKAN TEGANGAN PANEL SURYA
Authors: Sirait Calvin Yobel , Matalata Hendi 
Published: December 2018

Boost Converter adalah perangkat catu daya listrik untuk menaikan tegangan DC (Direct Current), teknologi Boost Converter ini berdasarkan pada mode pensaklaran menggunakan pembangkitan sinyal PWM (Pulse Width Modulation )yang diperuntukan kepada komponen saklar daya pada rangkaian Boost Converter, sinyal PWM ini mempunyai duty cycle untuk memberikan kendali pada kenaikan keluaran tegangan. Pada penelitian ini pengaturan duty cycle menggunakan LDR (Light Dependent Resistor), yang mana pada fungsinya LDR akan mempunyai nilai hambatan yang besar dalam keadaan gelap dan mempunyai nilai hambatan yang kecil dalam keadaan terang. Hasil pengujian yang dilakukan LDR mampu memberikan perubahan duty cycle terhadap perubahan intensitas matahari sehingga perancangan Boost Converter pada penelitian ini mampu menaikan besar tegangan keluaran pada panel surya
مقارنة طرق تقدير معالم نموذج الانحدار في حالة ظهور مشكلة التعدد الخطي والقيم الشاذة
Authors: جواد نزار مصطفى , كمال غفران اسماعيل 
Published: December 2018

تستخدم المحاكاة لاختبار قوة وحصانة المقدرات لنموذج الانحدار المتعدد عند وجود مشاكل التعدد الخطي والاخطاء الغير طبيعية، وتم استخدام طرق للتقدير منها الاعتيادية والحصينة وهي طريقة المربعات الصغرى LSE، وانحدار الـ Ridge ، وطريقة القيمة المطلقة الصغرى RLAV والـ Ridge الموزون WRID وطريقة MM ومقدار انحدار الـ Ridge الحصين المعتمد على مقدار MM والذي يرمز له بالرمز RMM. ان RMM هي التعديل الى انحدار الـ Ridge المدمج مع مقدر MM الحصين. وقد وجد ان طريقة RMM هي افضل من الطرق الاخرى .
معوقات السياسة النقدية وبرامج الإصلاح الاقتصادي لواقع الاقتصاد العراقي
Authors: جواد سجى فاضل 
Published: December 2018

أن السياسة النقدية في العراق لم تشهد تحسناً كبيراً في دورها المطلوب منها، وهذا يعود الى جملة من التغيرات على أدائها ودورها في التأثير على المتغيرات الأقتصادية المهمة، اذ حصلت ظروف صعبة على المستوى السياسي والأقتصادي اسهمت في أضعاف دورها في العراق. فالحروب العسكرية الثلاثة في وقت قياسي دمرت البنى التحتية للأقتصاد العراقي، وأخرت عملية التنمية الأقتصادية والبشرية لعدة عقود بسبب الأستنزاف الكبير للموارد الطبيعية والبشرية والتي كانت يتمتع بها العراق والحصار الأقتصادي في أوائل التسعينات أوقع العراق في مشاكل اقتصادية وأجتماعية جمة منها. على سبيل الذكر الفساد الأدارى والمالي وضياع فرص الاستثمار وظهور المضاربات والأسواق الموازية، وتغير النظام السياسي في نيسان 2003 والغاء التشريعات والقوانين التي تحكم على السياسة النقدية بالتبعية لقرارات الدولة المركزية.
وبقدر تعلق الأمر بالسياسة النقدية فأن دورها كان مهماً في تقليل شدة الأختلالات أذ أستخدم البنك المركزي الأدوات المتاحة له بالتنسيق مع الوزارات المختصة الى جانب أعادة هيكلة الجهاز المصرفي وإعطاء دور للقطاع المصرفي الخاص والمختلط.
ولكن ما زالت هناك أمكانية وضرورة تبني أجراءات تغيير أستخدام بعض أدواته المباشرة وغير المباشرة لتحقيق الهدف المنشود وتعميق دوره كمستشار للدولة في الأمور الصيرفية والمالية والأجتماعية لتأمين الأنسجام الأمثل بين مهمته والسياسة العليا للدولة.
قياس اثر سعر الفائدة في حركة التدفقات المالية الدولية ( اليابان حالة دراسية) للمدة 1985- 2005
Authors: معلة حالوب كاظم , مال الله علي سلمان 
Published: December 2018

يعد الاقتصاد الياباني احد اكبر الاقتصادات الرأسمالية المتقدمة ويحتل المرتبة الثالثة بعد الاقتصاد الأمريكي واقتصاد الاتحاد الاوربي من حيث حجم الناتج المحلي الإجمالي والذي يكاد يقترب من (5) تريليون دولار سنويا.
لقد ادت التطورات المتلاحقة التي شهدها الاقتصاد العالمي وخاصة في حقل التمويل الدولي خلال العشرين سنة الاخيرة الى تصاعد وارتفاع في حجم وحركه رؤوس الاموال الدولية على اوسع نطاق بحيث اصبح يحتل احد اهم مصادر التمويل محليا واقليميا ودوليا حيث انه اصبح يستحيل على اي اقتصاد في العالم ان يعتمد فقط على ما يملكه من موارد ذاتيه تساهم لوحدها في بناء اقتصاده وان كان للاكتفاء الذاتي فيه نسبة عالية ومهمة الا انه لابد من التعامل مع الاخرين مما يتطلب معه دخول هذه الدول في اتفاقات ماليه او كتكتل لتسهيل الربط بين موارد هذه الدول وامكاناتها .
وحيث ان الاقتصاد الياباني يعتبر من الاقتصادات التي يعتد بها في هذا المضمار فسيتم تناول وتحليل تطور هذه التدفقات المالية الدولية من الاقتصاد الياباني واليه خلال العقدين الماضيين مستندين في ذلك على ما هو والاستثمار الاجنبي غير FDI متوفر لدينا من بيانات وارقام ودراسات تخص الاستثمار الاجنبي المباشر اللذان يعدان احد اهم عناصر التدفق الشامل للموارد المالية بين بلدان العالم المختلفة كما وان FPI المباشر لسعر الفائدة اثر كبير في اتجاه حركة الموارد المالية من والى بلدان العالم.
لقد تم تقسيم البحث الى ثلاث مباحث تضمن المبحث الاول دراسة تطور التدفقات المالية الدولية نحو الاقتصاد الياباني فيما ذهب المبحث الثاني الى تناول تطور ابرز المؤشرات النقدية والمالية في الاقتصاد الياباني وانصب المبحث الثالث على قياس اثر وتقدير وتحليل.
Disinfection of Archived Material by Radiation Processing Technology Keeping the Material Integrity
Authors: Pramanik Md Kamruzzaman , Miah Abdul Bathen , Alam Md Khorshed 
Published: December 2018

The aim of the study was to preserve paper-based archived material for a long period of time using ionizing radiation/nuclear technique. To conduct this research, old note-pad samples were selected as tentative archived material. Samples were prepared and irradiated at a series of radiation doses e.g. 0, 2.0, 4.0, 6.0, 8.0, 10.0 and 14.0 kGy at a dose rate of 12.8 kGy/h from panaromic Batch type 80 kCi 60Co source. After irradiation, different quality parameters such as microbiological (Total Viable Bacterial Count, Total Fungal Count), mechanical (Tensile Strength, Percent of Elongation at Break and Elastic Modulus) and color properties (L-value, a-value and b-value) of the samples were assessed to observe the immediate effect of ionizing radiation on these properties. Results showed that the total bacterial count of unirradiated (control) paper were 4.0X102 cfu/g and radiation dose of 2.0 kGy was enough to eliminate the microbial load completely. Among mechanical properties, tensile strength (TS) of unirradiated sample was 16.23 MPa and it was gradually increased as the dose increased and finally reached upto 18.99 MPa at a dose of 14 kGy causing the TS-change above significant level (p < 0.05). Though changes of percent of elongation at break (EB) due to irradiation was insignificant, elastic module (EM) increased as the radiation dose increased gradually. EM of non irradiated sample was 381.85N/m2 and it started changing significantly from 6.0 kGy and finally reaches upto 477.03 N/m2 at 14.0 kGy. Results showed that L-value of colour parameter changed very slightly though a and b-value changed significantly from 6.0 kGy. From these findings it can be inferred that a radiation dose of 4.0 kGy might be used to conserve the cultural heritage including valuable paper-based archived materials.
Bangladesh J Microbiol, Volume 33, Number 1-2, June-Dec 2016, pp 1-4
Microbiological Analysis of Different Flavoured Milk Samples Collected from Various Areas of Dhaka city, Bangladesh
Authors: Tabassum Shirin , Uddin Md Aftab 
Published: December 2018

Current study attempted to examine the chances of microbial contamination within the common flavored milk products consumed by the locality of Dhaka city, Bangladesh. All samples, collected from different super shops, revealed the presence of total viable bacterial counts within the range of 2.5×104 to 8×105 cfu/ mL. Staphylococcus spp., Pseudomonas spp., and coliforms were noticed to be predominant and were recovered from 6 out of 10 samples with an average load of 103-105 cfu/mL. Salmonella spp. was also detected in one sample. Study of the antibiotic susceptibility test further demonstrated that all the bacterial isolates were resistant against most of the commonly used antibiotics with the multi- drug resistant traits in several cases.
Bangladesh J Microbiol, Volume 33, Number 1-2, June-Dec 2016, pp 11-15
Isolation of Cellulolytic Bacteria from Soil, Identification by 16S rRNA Gene Sequencing and Characterization of Cellulase
Authors: Mahjabeen Faria , Khan Sazzad , Choudhury Naiyyum , Hossain M Mahboob , Khan Trosporsha Tasnim 
Published: December 2018

Microbial Cellulases have an escalating demand in many industries and constitute a major group of the industrial enzymes. It has attracted the attention of many researchers because of its tremendous industrial applications including textile industry, pulp, and paper industry, laundry and detergent industry, food and animal feed industry. The present study pursues to unfold a novel cellulase that can overcome existing challenges in biorefineries as well as to reduce biofuel production cost. Therefore, soil from a dairy farm was screened for potent cellulase producers on carboxymethylcellulose agar. Out of 68 isolates, 31 expressed cellulase activity. The best isolate so far had an extracellular crude enzyme activity of 0.167 U/ml and specific activity of 0.333 U/mg. The cell morphology, cultural characteristics, and biochemical tests presumptively identified it to belong to the genus Bacillus. Molecular analysis using 16S rRNA gene of the isolate indicated it to be Bacillus subtilis. The optimum pH and temperature for the activity of the crude enzyme were determined to be 5 and 65°C respectively.
Bangladesh J Microbiol, Volume 33, Number 1-2, June-Dec 2016, pp 17-22
Probiotic Lactobacillus sp. with bioremediation potential of toxic heavy metals
Authors: Ahmed Sangita , Islam Md Rafiqul , Ferdousi Jannatul , Iqbal Tabassum Samia 
Published: December 2018

Pollution of the environment and food with toxic heavy metals is being intensified in Bangladesh with industrial development. Consumption of foods and water contaminated with heavy metals imposes threat to human health. Aiming to find a solution to this problem, the present study focuses on probiotic Lactobacillus spp. with potential to remove heavy metals from environment as well as human body. A total of three Lactobacillus spp were isolated from curd samples and were identified based on their morphological and biochemical properties. These isolates were tolerant to low pH and bile salt which aids in their application in human gut. All isolates could tolerate 600 ppm chromium, 400 ppm lead, 400 ppm copper and 400 ppm zinc. The heavy metal tolerant Lactobacillus spp were also multi drug resistant and showed 100% resistance to Azithromycin, Cloxacillin, Gentamicin, Vancomycin, Streptomycin, Nalidixic acid, Trimethoprim-Sulfamethoxazole and Penicillin, while 100% sensitivity was observed to Imipenem.
Bangladesh J Microbiol, Volume 34 Number 1 June 2017, pp 43-46
Change and instability in production and yield of rice in Bangladesh
Authors: Farhana Zaki , Uddin Md Taj 
Published: December 2018

Rice is considered as one of the monumental sources of human energy in Bangladesh. It can be stated that a vital element by which agronomic sector has been earned most of the quantity of profits for national development in this country is rice. This study covers the data of rice including the time from 1972 to 2016 has been collected from secondary sources of Bangladesh Bureau of Statistics. Different statistical tools have been used to complete the analysis. The analysis reveals that area, production and yield of rice has increased significant during the study period. The growth rate of production is significantly higher than the growth rate of area and yield. Despite the production has been increased, It is not enough to full fill the demand of the country. It is observed that area, production and yield are not stable. Therefore, researchers, government, nongovernment organization and policy makers should come forward to improve this sector. By this way new ideas and findings could be generated in order to improve the growth of rice.
Res. Agric., Livest. Fish.5(3): 321-326, December 2018
Evaluation of serum electrolyte concentrations in Garole sheep of Sundarban region
Authors: Rahman Md Azizar , Islam Md Shahidul , Shanta Anika Jerin , Sujan Khaled Mahmud , Islam Md Kamrul 
Published: December 2018

Garole sheep is very popular for its biannual lambing and disease resistance characters. To evaluate some selected serum electrolytes (Na, K and P) ions in apparently healthy Garole sheep at Sundarban region under Shyamnagar Upazila of Satkhira district, blood samples were collected from 20 Garole sheep (8 males and 12 females) of aged about 6-48 months containing male lambs, rams, female lambs, pregnant ewes and lactating ewes according to the age, sex and physiologic status. Serum was separated and used for biochemical analysis for the measurement of target serum electrolytes. The results of the range and mean ± standard error (SE) of serum electrolytes are as follows: sodium 280-400 ppm and 342.96±7.19 ppm, potassium 30-55 ppm and 34.37 ± 0.72 ppm and phosphorus 40-90 ppm and 70.98 ±1.76 ppm respectively. The significant differences (P<0.05) between males and females in serum ions levels was recorded. It can be concluded that Na, K and P ion level in serum was higher in male than female and significant differences in ion level varies according to physiologic status of female Garole sheep.
Res. Agric., Livest. Fish.5(3): 351-358, December 2018
Determination of microbiological (Staphylococci) quality of fast food sold in the different restaurant in Sylhet sadar
Authors: Moushumi Purkayastha , Rahman Sahidur , Elahi ATM Mahbub E , Roy Sourav , Hussain Tanimul , Lucky Nasrin Sultana 
Published: December 2018

Fast food monger and restaurants premises are more rapidly growing in Sylhet city. This may cause serious health concern due to unhygienic environment are noticeable almost all types of fast food vendors and restaurants. Hence, the study was undertaken to assess a total viable bacterial count and especially emphasis given on total staphylococcal count of fast food items from various restaurants in and around Sylhet town. From January to February 2016, a total of 45 samples were collected and assessed of five fast food items (Singara, Shamucha, Chicken burger, Chicken roll and cake) belongs to three types of restaurants (Street, mid-level and high level). Assessment revealed, the highest mean value of TVC (Total Variable Count) was found in Shamucha (89.6×109 CFU/g.) nearly all types of restaurants whereas lowest was observed in Chicken burger (58.8×109 CFU/g.). However, Staphylococcal load (mean value of TSC) was seen highest in both Shamucha and Chicken burger (26×103 CFU/g.) and lowest were in cake (16×103 CFU/g.) of all types of restaurants. Street level restaurants were observed highly risk for microbial as well as Staphylococcal load when comparison with mid-level and high level restaurants. Based on International Microbiological Criteria, the total viable count and total staphylococcal count found in fast food samples were unsatisfactory of all types of restaurants. Therefore, this study recommends that further analysis is needed regarding this issue. Besides, necessary steps should be taken by the Government for maintaining hygienic standard for preparing, processing and handling cooked food in various restaurants.
Res. Agric., Livest. Fish.5(3): 327-333, December 2018
Fact findings about the frozen buck semen characters freezing with eyc and tris extender and productivity of Black Bengal does as the potential genetic resource in Bangladesh
Authors: Karim Md Fazlul , Khandoker MAM Yahia , Husain Syed Sakhawat 
Published: December 2018

The research work was conducted at the Artificial Insemination Center under the Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh to compare the efficacy between Egg Yolk Citrate (EYC) and Tris diluter for frozen semen production in Black Bengal buck. The parameters of semen characteristics included volume per ejaculate (ml), percentage of individual motility (progressive), normal and live sperm and sperm concentration (billion/ml). After dilution with EYC extender, It revealed from statistical analysis of frozen semen that individual bucks had significant effect (p<0.05) on sperm motility and but insignificant on motility after cooling with and without glycerol. In the same way, with Tris diluter, it was insignificant (p>0.05) on diluted semen motility and motility after cooling with and without glycerol. Motility and morphology of the sperm after equilibration and thawing showed insignificant difference among the bucks using EYC diluter. On the contrary, variation in the motility after equilibration and thawing was found significant (p<0.05) using Tris diluter and insignificant on normal and live sperm percentages. After insemination with frozen buck semen, productivity or conception rate was found significantly (p<0.01) higher (60.37%) in Tris than that of EYC diluter (43.75%). On the other hand, the productivity when compared among bucks within the diluter, the variation was not found significant (p>0.05).The productivity found both in Tris and EYC diluter is almost similar to abundantly used Triladyl diluter (58.25). It is concluded that tris diluter might be used as the alternative to the Tryladil diluter though further study is to be needed for more confirmation.
Res. Agric., Livest. Fish.5(3): 341-350, December 2018
Livelihood status of women workers in shrimp sector at south western region in Bangladesh
Authors: Begum Nasrin Nahar , Khan Md Nazrul Islam , Rahman Sk Shafiqur , Islam Sheikh Nazrul 
Published: December 2018

In Bangladesh, women are engaging in shrimp sector to support themselves and their family as well. Current study was designed to study the socio-economic and hygienic status of the women working in shrimp sector (employee) in South Western region in Bangladesh (N=150). The study also selected women who are not working in shrimp sector (non-employee) in the same community (N=75) to evaluate impacts of shrimp industry on women. In socio-economic background analysis of the women, medium household size (46% and 65.3%), primary education level (63.3% and 48%), married (79.3% and 97.3%), drinking tube-well water (93.3 % and 92%) and polli electric facility (77.3% and 84%) was dominant in both cases. Average monthly household income and expenditure was found better among the employees (9235 ± 4042 Tk and 765 5± 3032 Tk, respectively) than the non-employees (9068 ± 3113 Tk and 7208 ± 2147 Tk, respectively). In summary, the study observed and suggesting that life style and hygienic condition is better among the women engaged in shrimp sector than the nonemployee in the same community.
Res. Agric., Livest. Fish.5(3): 391-397, December 2018
Improvement of Visual Acuity Following Refractive Surgery for Myopia and Myopic Anisometropia
Authors: Vuori Elisa , Tervo Timo M T , Holopainen Martti V A , Holopainen Juha M 
Published: December 2018

ABSTRACT
PURPOSE: To test the hypothesis that anisometropic adults without significant amblyopia suffer from mild visual impairment probably due to aniseikonia, which might be improved by corneal refractive surgery.
METHODS: Fifty-seven patients presenting with myopic anisometropia ≥3.25 diopters (D) and 174 myopic controls appropriate for refractive surgery were included. Photorefractive keratectomy (PRK) or LASIK was performed on 57 anisometropic eyes. As 43 of the 174 myopic control patients had bilateral surgery, PRK or LASIK was performed on 217 myopic control eyes. Best spectacle-corrected visual acuity (BSCVA), refraction, and refractive correction were measured preoperatively and at 1, 3, 5 to 7, 8 to 13, and 25 months following surgery.
RESULTS: Preoperative mean spherical equivalent was -7.20±2.40 D for anisometropic patients and -6.40±1.90 D for myopic patients. At 8 to 13 months postoperatively, when 23 (40%) anisometropic eyes and 94 (43%) myopic eyes were examined, the mean spherical equivalent refractions were -0.80±1.60 D and -0.30±0.60 D, respectively. Preoperatively, the mean BSCVA on a logMAR scale was -0.0143±0.0572 (Snellen 0.98±0.12) in the anisometropic group and 0.0136±0.0361 (Snellen 1.04±0.09) in the control group (P=.001). Eight to 13 months postoperatively, these values were 0.0076±0.0659 (Snellen 1.03±0.15) and 0.0495±0.0692 (Snellen 1.13±0.18) and this difference remained statistically significant (P=.012). For the myopic patients, the improvement in BSCVA reached almost maximum at 3 months, and this improvement was found to be highly significant 3 months after surgery (P=.001). The improvement in BSCVA was significantly slower for anisometropic patients and became statistically significant only after 8 to 13 months postoperatively (P=.041).
CONCLUSIONS: Anisometropia reduces visual acuity in the more myopic eye and can be at least partially reversed by refractive correction. The slower improvement in BSCVA for anisometropic patients suggests plastic changes in the visual cortex following refractive surgery. [J Refract Surg. 2007;23:447-455.]