bluuebunny/crossref_metadata_2025 huggingface dataset:
Fuzzy Controller to Prepare the Dialysate Solution in Hemodialysis Machine
Authors: Shaza Yasser Shehada, Joumana Mahmoud Diab, Ahmad Suliman Ah Shaza Yasser Shehada, Joumana Mahmoud Diab, Ahmad Suliman Ah
Published: May 2021

We concentrate on designing a fuzzy controller, its task is management the operation of preparing the dialysate solution with the required Specifications and continuous monitoring to set the value of conductivity that takes major role to success the bloody Purification operation, where any error in this operation lead to reduce the efficiency of hemodialysis machine so the patient will face the damage. In this research, we reduced the time to treatment (TTT) by speeding the preparing operation of the dialysate solution, and achieve more reliable value of required conductivity so it reduces the alarms that result of override the allowable values which lead to stop the preparing operation and wait for the required values. The fuzzy controller gave us more efficiency when we compared with other controllers which was achieved in previous researches, so we can use the learning algorithms to make this controller more adaptive.
فاعلية برنامج تدريبي مستند إلى التعلّم للدماغ في تنمية التحصيل الدراسي لدى طالبات الصف السابع الأساسي
Authors: الشاويش جمان غالب محمد
Published: May 2021

هدفت هذه الدراسة إلى تقصي أثر برنامج تدريبي مستند إلى الدماغ في تنمية التحصيل الدراسي لدى طالبات الصف السابع الأساسي في تدريس مادة العلوم , اتبعت الدراسة المنهج شبه التجريبي,عينة الدراسة تكونت من 60 طالبة من طالبات الصف السابع الأساسي تم اختيارهن عشوائيا من مدرسة من مدارس تربية معان , وتم توزيعهن إلى مجموعتين : تجريبية درست وفق البرنامج التدريبي المستند إلى بحوث الدماغ وتضم (30) طالبة وضابطة درست باستخدام البرنامج الاعتيادي تضم ( 30 ) طالبة, لتحقيق أهداف الدراسة أعد اختبار , وتم التحقق من صدق الأداة وثباتها عن طريق عرضها على محكمين, وعولجت بيانات الدراسة باستخدام الإحصاء الوصفي والإستدلالي وفحصت فرضيات الدراسة باستخدام حساب المتوسطات الحسابية والانحرافات المعيارية لأداء أفراد عينة الدراسة على مقياس التحصيل الدراسي وتحليل التباين المصاحب من نوع One Way ANOVA أظهرت النتائج فاعلية التدريس باستخدام التعلم المستند إلى الدماغ في تحصيل طالبات الصف السابع في مادة العلوم وأظهرت النتائج وجود فرق ذو دلالة إحصائية α=0.01 بين متوسطات علامات الطالبات بين المجموعة التجريبية والضابطة لصالح الطريقة المعتمدة إلى الدماغ , كما أن هنالك فروق ذات دلالة إحصائية عند مستوى الدلالةα=0.01 بين المجموعة الضابطة والتجريبية في اختبار مهارات الحس في العلوم وقدمت الباحثة عدد من التوصيات والمقترحات.
أسلوب الاستفهام في ديوان الشاعر ابن عثيمين
Authors: الشراري خالد صالح
Published: May 2021

تناولت هذه الدراسة أسلوب الاستفهام في شعر ابن عثيمين من خلال ديوانه "العقد الثمين من شعر محمد بن عثيمين " بأسلوب علمي، متبعاً المنهج الإحصائي النحوي. وتهدف إلى معرفة الأنماط المختلفة لكل أداة من أدوات الاستفهام التي ذكرت في ديوانه. بدأت الدراسة بتعريف للشاعر محمد بن عثيمين، وهو ليس بالشيخ المعروف محمد بن عثيمين، ثم تعريف الاستفهام لغةً واصطلاحًا، ثم تحدث الباحث عن أدوات الاستفهام ودلالتها ومعناها، ثم انتقل إلى تتبع أدوات الاستفهام في شعر ابن عثيمين مستعرضًا جميع قصائده، ومدى ارتباطها بالسياقات اللغوية؛ ليتوصل إلى مدى وجود هاجس السؤال لدى شاعر الجزيرة العربية ( محمد بن عثيمين )، وبيان ارتباط الشاعر بالقاعدة النحوية أو خروجه عنها، وذلك من خلال الاستقراء الكامل لشعره.
دراسة مقارنة لعوامل الضراوة الخاصة ببكتيريا الكليبسيلا Klebsiella spp. المعزولة من بيئات مختلفة
Authors: نجيب ليث مصلح , حمدي نغم معد
Published: May 2021

أجريت الدراسة الحالية للتحري عن عوامل الضراوة Virulence factorsالمختلفة للعزلات البكتيرية المقاومة للمضادات الحيوية والمعزولة من بيئات مختلفة . حيث تم تجميع 247 عينة سريرية وبيئية من مصادر مختلفة معزولة على وسط الأجار المغذي ، وقد بينت نتائج الزرع البكتيري أن 46 عزلة تعود إلى بكتيريا Klebsiella ، كما أبدت العزلات نتائج متباينة تجاة المضادات الحيوية ومن نتائج المقاومة والحساسية للمضادات الحيوية تم أختيار 18 عزلة بكتيرية مقاومة للمضادات الحيوية لدراسة بعض عوامل الضراوة وللتحري عن الجينات المسؤولة عن صلة القرابة مابين العزلات بأستخدام (PCR) وبينة النتائج أن معدل التشابه الوراثي الكلي للعزلات البيئية والمرضية 64 % ، مما يدل على أن مصدر الاخماج البكتيرية قد تكون من ملامسة التربة أو الماء.
اختبار أثر الذكاء الشخصي على صناعة القرار:دراسة تطبيقية على أكاديمية السودان للعلوم
Authors: مختار مهند عباس , حامد آدم أحمد موسى
Published: May 2021

تهدف الدراسة إلي اختبار أثر الذكاء الشخصي علي عملية صناعة القرارات لمنسوبي أكاديمية السودان للعلوم ولتحقيق ذلك تم تصميم استبانة وتم جمع البيانات من مجتمع الدراسة وتحليلها واختبار الفرضيات باستخدام الحزمة الإحصائية للعلوم الاجتماعية (SPSS) من خلال اعتماد عدد من الأساليب الإحصائية المتنوعة وبعد إجراء عملية التحليل لبيانات الدراسة واختبار فرضياتها توصلت الدراسة إلي عدد من النتائج أهمها بأن هنالك علاقة إيجابية و معنوية بين الذكاء الشخصي وعملية صناعة القرار كما أشارت النتائج أيضاً لوجود علاقة إيجابية و معنوية بين الدافعية وعملية صناعة القرار.إضافة لوجود علاقة إيجابية و معنوية بين التفكير المنظم وعملية صناعة القرار،وأوصت الدراسة بضرورة التأكيد علي حفز الذكاء لدي العاملين في منظمات الأعمال وإجراء مزيدا من الدراسات التطبيقية حول موضوع الذكاء لدي متخذي القرارات الإدارية في منظمات الأعمال.
فعالية استراتيجية التعليم المعكوس باستخدام نظام البلاكبورد و تطبيق الواتس آب على التحصيل الاكاديمي والاتجاه نحو استخدام الانترنت في التعليم لدى طالبات قسم الاقتصاد المنزلى بكلية التربية بجامعة الأمير سطام بن عبدالعزيز
Authors: زاهد منال عبدالله
Published: May 2021

اصبح استخدام التكنولوجيا وأساليب التواصل في التدريس أمرا حتميا نظرا للانتشار السريع للتطبيقات التكنولوجية المختلفة واستخدام الطلاب لها بشكل مستمر ، في حين تراجعت فعالية الطرق والاستراتيجيات التقليدية في التدريس، وفي هذا الاطار يستهدف البحث الحالي قياس مديفعالية استراتيجية التعليم المعكوس باستخدام نظام البلاكبورد و تطبيق الواتس آب على التحصيل الأكاديمي والإتجاه نحو استخدام الانترنت في التعليم لدى طالبات قسم الاقتصاد المنزلي بجامعة الأمير سطام بن عبدالعزيز ، حيث بلغت عينة البحث (89) طالبة تم اختيار (44) منهم - بطريقة عشوائية - ليمثلوا المجموعة التجريبية التي درست مقرر طرق تدريس (2) وفق استراتيجية التعليم المعكوس ومثلت (45) طالبة المجموعة الضابطة والتي درست بالطريقة التقليدية (المحاضرة التفاعلية )، وطبقت أدوات الدراسة المتمثلة في اختبار تحصيلي للمقرر ومقياس اتجاه نحو التعليم القائم على الإنترنت، وبعد المعالجة الإحصائية لنتائج الدراسة توصلت الباحثة الى وجود فعالية مرتفعة لتطبيق استراتيجية التعليم المعكوس باستخدام نظام البلاكبورد وتطبيق الواتس آب على نتائج الاختبار التحصيلي لمقرر طرق تدريس (2) وذلك لصالح المجموعة التجريبية مقارنة بالتدريس التقليدي بإستخدام المحاضرة التفاعلية للمجموعة الضابطة، كما توصلتالى وجود دلالة مرتفعة على الاتجاه نحو التعليم القائم على الانترنت لصالح المجموعة التجريبية في مقابل المجموعة الضابطة وذلك بناءا على تطبيق مقياس ( الاتجاه نحو التعليم القائم على الانترنت لحسن الباتع )، وقد أوصت الدراسة الىأهمية تطبيق استراتيجيات التدريس التي تعتمد على الانترنت وتطبيقات برامج التواصل الالكتروني وكذلك الاستراتيجيات المتمركزة حول الطالب.
فاعلية التخطيط الاستراتيجي في إدارة الشغب الرياضي (دراسة مسحية على جماهير كرة القدم في جدة)
Authors: الشمراني أحمد فهد
Published: May 2021

هدفت الدراسة الحالية إلى استعراض بعض المفاهيم (إدراك الجماهير لمفهوم التعصب الرياضي وشغب الملاعب) ،التعرف على الدور الذي يلعبه الاعلام المرئي والمسموع ،ومواقع التواصل في إشعال الشغب في الملاعب السعودية،استعراض الإستراتيجيات الأمنية لإدارة الأزمات والكوارث الرياضية في المملكة العربية السعودية (حماية المنشآت الرياضية – السيطرة على الجماهير والحشود – تأمين الممتلكات العامة والخاصة) من وجهة نظر الجماهير السعودية والعاملين في مجال الرياضة، التعرف على وعي الجماهير السعودية بمخاطر الشغب الرياضي واستعدادهم لإدارة الأزمات من خلال (التوعية الإعلامية – التدريب على الأزمات – الحفاظ على المنشأت الرياضية حيث استخدم الباحث المنهج الوصفي والمنهج التحليلي وكانت عينة الدراسة مكونة من عينة عشوائية مكونة من مجموعة من مشجعى كرة القدم السعودية و العاملين في المجال الرياضي من الذكور قوامها (106) بمدينة جدة. وكانت اهم النتائج : أن الإعلام المرئي والمسموع سبب رئيسي في اشعال فتيل شغب الملاعب، أن غالبية المشاركين في شغب الملاعب هم من الفئات الشابة ، أن التقنيات الحديثة المستخدمة في مراقبة الملاعب الرياضية والنظام الأمني للملاعب ذا فاعلية عالية ويسهم في التقليل من مخاطر شغب الملاعب ،هناك عدم شفافية ووضوح من قبل بعض الجهات الأمنية ولا توجد مشاركة فعالة للمواطن مع الجهاز التنظيمي والمنظمين في عدد من القطاعات ذات العلاقة سواء كانت أمنية أو رياضية أو رقابية ،أن هناك توعية اعلامية ولكنها غير كافية وتحتاج لتحسين ،أهم التوصيات: فرض الرقابة على السيناريوهات المقدمة في البرامج الرياضية والتي تسهم في اثارة حفيظة الجاهير مما يؤدي لشغب الملاعب ،زيادة البرامج التوعوية بالروح الراضية ونبذ التعصب وابعاد فكرة التقليد الاعمى لبعض الجماهير في بعض الدول والتمسك باخلاقنا وعاداتنا وتعاليم ديننا السمح.
Пріоритетні напрями та механізми розвитку цифрової економіки в Україні
Authors: Шиманська Катерина Володимирівна , Бондарчук Віталій Вікторович
Published: May 2021

Процес державотворення передбачає трансформацію всіх сфер життя суспільства, в тому числі й економічних відносин. Розвиток цифрової економіки України лише набирає обертів, і важливо правильно обрати напрям та інструменти її формування. Цифровізація економіки відбувається одночасно на макро- і мікрорівні. Необхідно будувати цифрове середовище національної економіки таким чином, щоб воно задовольняло потреби не лише держави в особі державних інституцій, але й громадян та бізнесу.

Дослідження формування і розвитку цифровізації економіки України показало, що цей процес має сильні та слабкі сторони. Використання сильних сторін може суттєво пришвидшити цифровізацію та забезпечити економічні вигоди для всіх суб’єктів економічних відносин в Україні. Цьому сприяють і наявні в нашій державі можливості. Проте необхідно також працювати над нівелюванням слабких сторін та вживати заходи щодо мінімізації загроз для цифровізації економіки. Запропоновані механізми цифровізації можуть забезпечити поступове впровадження цифрових технологій у стратегічних галузях вітчизняної економіки, які є фундаментом для подальшого процесу цифровізації. Необхідно створити такі умови, коли цифровізація є бажаною та забезпечує конкурентні переваги для бізнесу і зручність для споживачів. У такому випадку формування цифрової економіки в Україні відбуватиметься з ініціативи бізнесу та громадськості, які і є основними бенефіціарами цього процесу.
Development of the strategic financial engineering accounting system
Authors: Proskurina Nelia , Gryn Viktoriia
Published: May 2021

The necessity of developing information add-ins to the financial accounting system for the formation of additional strategic information is revealed. Additional types of information needed by stakeholders to make strategic decisions are highlighted. Historical aspects of the emergence of strategic accounting engineering are considered. The main ways of developing engineering principles for building a strategic financial accounting system are highlighted and analyzed. The sequence of formation of derivative strategic balance sheets is developed through the development of an engineering system of financial accounting of an enterprise, which includes the following stages: 1) aggregation of elements of financial statements; 2) implementation of corrective operations; 3) implementation of transformational (hedged) operations; 4) implementation of strategic operations; 5) implementation of hypothetical operations. The necessary sources of information for forming a derivative strategic balance sheet of an enterprise are disclosed. A model for generating a derivative strategic balance sheet of an enterprise has been developed, which allows calculating engineering indicators (net assets, net assets after adjustments, hedged net assets, strategic net assets, net liabilities) for analyzing the results of strategic enterprise management.
Enfoque de Gestión Universitaria en la vinculación educativa comunitaria
Authors: Orozco Hernández Jaime , Astudillo Cobos Alexandra
Published: May 2021

El incremento de la densidad poblacional y la incesante dificultad que se vive en las áreas urbano-populares hace que los recursos económicos del Gobierno Autónomo Descentralizado Municipal, asignados para “invasiones” de solares, lotes y sectores no urbanizados, no puedan satisfacer sus necesidades. La universidad asume la corresponsabilidad social frente a los indicadores de calidad de vida que promueve el Plan Nacional del Buen Vivir, mediante la implementación de proyectos de investigación, vinculación, convenios interinstitucionales, actividades culturales y otras; lo que requiere tanto de un modelo educativo adecuado, como de una gestión universitaria pertinente. El modelo se afianza en propuestas comunitarias acorde a los cambios sociales que vive nuestra región. Por ende, amerita un diagnóstico situacional que refleje las etapas de asentamiento poblacional, su visión y esperanza de mejores días. Partiendo de esta realidad, se promueve la participación educativa para mejorar la calidad de vida de los habitantes. El compromiso universitario se fundamenta en una estrategia motivacional hacia los estudiantes para que conozcan la realidad social de su entorno, lo que se logra haciendo que ellos participen en todas las instancias de un plan de vinculación con la comunidad.
KINEMATICS OF THE V MECHANISM USED FORELECTRIC SWITCHERS BASED ON SPECIALISED SOFTWARE
Authors: ANTONESCU PĂUN , UNGUREANU LIVIU-MARIAN , BREZEANU COSTANTIN
Published: May 2021

This paper is representing a continuing research of the doctoral thesis "Geometrical analysis and synthesis of mechanisms in the electrotechnical field". Using two Mathcad programs as mathematics analysis software and Solidworks as graphical analysis software it is dimensioned the new kinematics scheme of the high voltage V mechanism. Kinematic analysis is based on the mathematical model presented in the doctoral thesis mentioned above and graphical modeling and analysis is conducted to compare and complete the research regarding the V mechanism triadic chain 5R + T type.
THICKNESS INFLUENCE ON ABSORBING PROPERTIES OF STRATIFIED COMPOSITE MATERIALS
Authors: IAȘNICU (STAMATE) IULIANA , VASILE OVIDIU , IATAN RADU
Published: May 2021

Plates known as sound absorbing materials: textiles recovered fabrics plus polyethylene are made layered composite material intended to be used to encapsulate industrial engines, as sources of noise in the production departments. Influence of thickness sound-absorbing material can be supported by the values obtained for the absorption coefficient, but it can be studied as a study case in the anechoic chamber, where the sound pressure level is measured with a sound level meter. Cases captured: a free engine; the engine placed in a metallic cube and motor inserted; metal cube that was doubled separately with one material and then with the composite material proposed. For each situation are eight determinations on the perimeter of a circle with a radius of one meter from the source of the noise. Plot a graph of experimental results that support the idea: greater thickness of the layer of material will cause a better absorption of noise.
THE PRODUCTION CAPACITY OF LEACHATE COLECTED FROM PIATRA NEAMT LANDFILL
Authors: BELCIU MIHAI-COSMIN , CHIȚIMUȘ ALEXANDRA-DANA , NEDEFF VALENTIN , BÂRSAN NARCIS , DRAGOȘ RUSU
Published: May 2021

Lately it was seen an growth and range broadening of activities in all sectors of economy and society and therefore, the management of waste is a problem facing the entire planet. This paper purpose an analysis of a Romanian Landfill, concerning leachate production. Mathematical models applied on landfill products create an environmental background in which concerns waste management in Romania.
ON A METHOD FOR DETERMINING THE NEUTRAL SURFACE OF THE LAMINATED MONOLITH COMPOSITES
Authors: IATAN RADU I. , ENĂCHESCU GEORGIANA LUMINIŢA , FLORESCU PAVEL GH.
Published: May 2021

This paper approaches the methodology for determining the neutral surface of a layered composite. It is to be neglected the spins effect on normal sectional unit load, respectively the influence of the specific linear movements when calculating the bending and torsion of the unit moments. It enables the distribution of tasks specified in the layers' level for evaluating maximum stresses and comparing them to the existing structure of the materials existing in the structure.
EXPERIMENTAL STUDY CONCERNING THE DISTRIBUTION OF GRANULAR PARTICLE SHAPE FROM A FILTER LAYER
Authors: IRIMIA OANA , NEDEFF VALENTIN , PANAINTE LEHĂDUŞ MIRELA , TOMOZEI CLAUDIA
Published: May 2021

The shape of granular particle from a filter layer represent a determinant factor regarding the efficiency of filtration process. In order to adequately predict the efficiency of granular filters is necessary to know the distribution of granular particle shape from filter layer. This paper presents a small study - in terms of experimental results, but laborious - in terms of sample preparation, regarding the identification of distribution by shape classes of granular particles from a filter layer. For experimental determinations have been used perlite and anthracite - two granular filter materials. It has been analyzed in terms of particle shape 1,000 particles of perlite and 1,000 particles of anthracite taken randomly from each filter layer. It has been observed that spherical particles have an average distribution for two type filter materials.
NONLINEAR PROPERTIES OF BARIUM TITANATE CERAMICS
Authors: LAZAROV IVAYLO , ZHEGLOVA ANKA
Published: May 2021

The materials based on barium titanate have nonlinear dependence of polarization on the intensity of the electrical field. The properties of those materials are used when different automation elements such as primary converters, phase regulators for low and high frequencies, sensors, modulators etc. are derived. Ceramics based on barium titanate (BaTiO3) alloyed with H3BO3 and Bi2O3 have been derived and researched. The influence of the temperature of sintering on the values of the dielectric permittivity on the structural properties has been determined. The influence of the quantity of the added material on the temperature dependencies and the non-linear properties of the ceramics have been analyzed. Both legation additives decrease the sintering temperature. However, the values of the dielectric permittivity decrease while the non-linear properties of the doped barium titanate (BaTiO3) improve. The coefficient of non-linearity reaches its maximum for the H3BO3 composites, synthesized at temperature of 1100 oC.
LIFE CYCLE ASSESSMENT OF POINT-OF-LAY BIRDS TO FROZEN CHICKEN PRODUCTION IN A TROPICAL ENVIRONMENT
Authors: EWEMOJE TEMITAYO A. , ABIMBOLA OLUFEMI P. , OMOTOSHO OLAYINKA A.
Published: May 2021

The study examined four scenarios for reduction of environmental impacts with use of 100 % purchased electricity in all processing activities as first scenario while second scenario was the use of 100 % electricity from diesel generators. Third and fourth scenarios were to use 50 % each of both purchased electricity and diesel-generated electricity in all activities. Most of the Energy Use (EU) came during the freezing process. Global Warming Potential (GWP) value for Scenario 2 is predominantly higher than the values for other three scenarios. The results show that the major source for global warming potential for Scenario 2 is the freezing process, whereas for the other three scenarios the animal management represents the main contributor. Similar to GWP, the Acidification Potential and Eutrophication Potential values for Scenario 2 were higher, although very small and this may be attributed to diesel generators emitting slightly higher amounts of NOx and SOx.
INTERACTIONS BETWEEN C6H4(CH2NH3)2[PhCO2]2, Et2NH2[Ph(OH)CO2] AND CuCl2, ErCl3 or SnPh3OH: AN INFRARED STUDY
Authors: TOURE ASSANE , DIOP LIBASSE
Published: May 2021

The interactions of benzoic or salycilic acids salts with di-, trihalides or SnPh3OH have yielded four new complexes and adducts studied by infrared.The suggested structures are discrete or of infinite chain type, the anion behaving as monodentate and hydrogen bonding involved, or bidentate, the environments around the metallic centres being tetrahedral, octahedral or trigonal bipyramidal. When N-H groups are involved in extra hydrogen bonding, a supramolecular architecture may be obtained.
RESEARCHES REGARDING THE INFLUENCE OF THE NUTRITION SPACE AT DRACOCEPHALUM MOLDAVICA L. (DRAGONHEAD) SPECIES CULTIVATED UNDER THE CONDITIONS OF A.R.D.S. SECUIENI
Authors: NAIE MARGARETA , MIRZAN OANA , DOBREA DANIELA-IULIANA
Published: May 2021

The present paper presents the results on the influence of the nutrition space at Dracocephalum moldavica L., cultivated under the conditions of A.R.D.S. Secuieni between 2016 and 2017. Following the interaction of the factors, the distance between the rows and the distance between the plants per row was found that in the variant sown at 70 cm between the rows and 15 cm between the plants per row there was an increase in the average number of branches (2,27). The variants sown at 50 cm and 70 cm between the rows achieved deficit production, very significant compared to the control sowing at the 25 cm between the rows.
NEW TRANS-1,2- CYCLOHEXYLDIAMINO-NN,N’N’ (CH2CO2)(CH2CO2H)3 ANION CONTAINING ADDUCTS AND DERIVATIVES: SYNTHESIS AND INFRARED STUDY
Authors: AWA SECK GORGUI , SENE ABOUBACRY , DIOP LIBASSE
Published: May 2021

Five Cyclohexyldiamino-NN, N’N’(CH2CO2)(CH2CO2H)3 anion containing adducts and derivatives with tin, antimony and mercury halides have been synthesized and characterized by infrared spectroscopy. The suggested structures are discrete, the anion behaving as a monodentate or a monochelating ligand: the environments around the metallic centres are trigonal bipyramidal or octahedral.The carboxylic groups and the cation, when involved in extra OH---O, OH----Cl or NH---Cl or O hydrogen bonds may lead to supramolecular architectures.
DENSE GLASS FOAM PRODUCED IN MICROWAVE FIELD
Authors: PAUNESCU LUCIAN , DRAGOESCU MARIUS FLORIN , AXINTE SORIN MIRCEA , PAUNESCU BOGDAN VALENTIN
Published: May 2021

Experimental results obtained in the process of manufacturing dense glass foam using the microwave energy are presented in the work. The glass foam is produced from bottle glass waste, calcium carbonate as foaming agent and borax as fluxing agent. The high compressive strength (2.5 - 6.2 MPa) is the main mechanical feature of this product, which together with other physical and morphological features (apparent density 0.60 – 0.90 g/cm3, porosity 59.1 – 72.7%, thermal conductivity 0.081 – 0.105 W m K, water absorption 0.5 – 1.0%, pore size 0.5 – 3 mm), are appropriate for using as a substitute for similar building materials existing on the market.
A PROJECT MANAGEMENT UTILITY FOR AGRICULTURAL FACILITIES AND PUBLIC HEALTH
Authors: KOLIOPOULOS TILEMACHOS , CIARKOWSKA KRYSTYNA , ANTONKIEWICZ JACEK , THEOCHARATOS SOKRATIS , RADU CRINA , CRISTEA ION , KOULOUMPIS PANAGIOTIS
Published: May 2021

This research study analyses the project management of agricultural facilities that protect agricultural food and public health from associated toxic hazardous landfill emissions and risks. Project management is presented by the development of a geoinformatics utility so as to improve operational management not only in food production minimizing the consumption of resources but also to improve the bio capacity development of the services and products through effective constructions minimizing risks for public health. Useful results are presented based on geoinformatics utility that develops sanitary drawings in sustainable designs minimizing risks and indoor pollution hazardous emissions in working spaces minimizing health risks.
WIND SPEED ANALYSIS AT IKEJA, NIGERIA USING THE CONVENTIONAL PROBABILITY DENSITY FUNCTIONS
Authors: OGUNSOLA OLUSEYI , OSAGIEDE OFURE
Published: May 2021

The wind energy potential at Ikeja (Lat. 6.35 N; Long. 3.20 E), Nigeria was statistically analyzed using three of the mostly utilized conventional Probability Distribution Functions (PDFs) in order to determine which of these distributions would give the best means of analysis for wind in this particular location. The best fit test for these PDFs were determined from Akaike Information Criteria, Bayesian Information Criteria, Kolmogorov-Smirnov test, Cramer-von Mises statistics, Anderson-Darling Statistic, Mean Square Error and Chi-Square Test using Maximum Likelihood Estimation and Method of Moments as parameter estimates. The Weibull distribution gave the best fit in this location.
NONCONVENTIONAL TECHNIQUE FOR PRODUCING HIGH MECHANICAL STRENGTH GLASS FOAM FROM GLASS WASTE
Authors: PAUNESCU LUCIAN , DRAGOESCU MARIUS FLORIN , AXINTE SORIN MIRCEA , SEBE ANA CASANDRA
Published: May 2021

In the work experimental results on the manufacture of glass foam with high mechanical strength from glass waste are presented. By replacing the usual conventional energy source with a nonconventional energy (electromagnetic waves) the heating efficiency allows a fast and economical manufacturing process. Calcium carbonate as a foaming agent and an addition of sodium silicate (aqueous solution) as a binder were used. By their physico-mechanical and morphological features (0.40-0.66 g/ cm3 the apparent density, 0.054-0113 W/ m·K the thermal conductivity, 2.2-6.3 MPa the compressive strength, below 1.2 % the water absorption and under 2 mm the pore size), the foams are appropriate for their use as replacer of existing similar building materials on the market.
MULTI-CRITERIA DECISION APPROACH WITH AHP AND IF-TOPSIS METHODS FOR R&D PROJECT SELECTION PROCESS
Authors: GÜLER EZGİ , AVCI SELEN , ALADAĞ ZERRİN
Published: May 2021

In this study, we examined the project selection process in a mould manufacturing company. We ranked 12 criteria via Analytic Hierarchy Process (AHP) and evaluated the most important 8 criteria. Then we applied Intuitionistic Fuzzy TOPSIS (IF-TOPSIS) method, which is the extended version of the TOPSIS method in intuitionistic fuzzy environment. After expressing the decision makers' evaluations in linguistic terms, we turned them into intuitive fuzzy numbers. In the last step, we obtained the project rankings by calculating the closeness coefficient for 5 projects.
TRAJECTORY ERROR MINIMISATION METHOD DUE TO TRANSIENT REGIME VARIATION OF INDUSTRIAL ROBOTS KINEMATIC LINKS
Authors: LUNCANU ANDREI , STAN GHEORGHE
Published: May 2021

In the current industry, industrial robots are gaining more and more ground to classical positioning methods, especially due to the ratio of workspace / volume of the industrial robot. For this reason, methods of minimization of trajectory errors are necessary. Among the multitudes of factors that affect the trajectory precision is the difference between the programmed transient regime and the measured transient regime of the kinematic link used in the structure of the industrial robots. In this paper is presented the method of measurement the transient regimes of the end-effector and a method of compensation of the trajectory error.
INVESTIGATING ELECTRICITY CONSUMPTION IN OGUN STATE, NIGERIA
Authors: BADEJO BAMIDELE , OMOWUMI OLASUNKANMI , OGUNSEYE NATHANIEL
Published: May 2021

This study examined electricity consumption in a Nigeria township with a view of understanding the challenges faced by electricity consumers and to proffer practicable suggestions for sustainable electricity supply. Major findings emanating from the study show that 26.7 % of respondents acknowledged the electricity supply through the electricity service provider (ESP). Again, 71 % of respondents relied on electricity through the alternative’s sources complementing ESP services. Furthermore, 75 % of respondents confirmed a temporal supply of 5 hours daily representing 20 % daily electricity supply. In another dimension, in terms of billing, 62.4 % received estimated electricity bills as many homes are without electricity meters. Finally, this study revealed some planning and policy implications and provided recommendations through which electricity consumption in the state could be improved upon.
WIND ENERGY EVALUATION AND TURBINE IDENTIFICATION FOR POWER GENERATION IN SOME SELECTED AREAS IN NIGERIA
Authors: SULAIMAN MUSEDIQ ADEDOYIN , OKAKWU IGNATIUS KEMA , ALAYANDE AKINTUNDE SAMSON , OLABODE OLAKUNLE ELIJAH , IBHAZE AUGUSTUS EHIREMEN
Published: May 2021

In this paper, the wind power potentials as well as wind speed characteristics of four selected locations in the North-Central (Ilorin and Makurdi) and North-East (Gombe and Maiduguri) parts of Nigeria are investigated. The data used are obtained from Nigeria Meteorological Agency (NIMET) between the durations of 11 and 54 years, measured at an anemometer height of 10m. The analysis of the data is carried out using a two-parameter Weibull Distribution Function (WDF). The most probable wind-speed and the wind-speed carrying the maximum energy were also evaluated. The capacity factor estimation is then used to identify the most suitable turbine for the sites. The results obtained show a monthly mean wind-speed of 4.50 m/s, 3.72 m/s, 4.77 m/s and 5.34 m/s for Ilorin, Gombe, Makurdi and Maiduguri respectively, while the wind-power densities were 67.74 W/m2, 40.87 W/m2, 79.52 W/m2 and 107.49 W/m2 respectively for the same sites.
IMPLICATION ON FIXED-BED-CATALYTIC-REACTOR DESIGN WHEN CONSIDERING INTRAPARTICLE MATERIAL BALANCE AT MICROSCALE
Authors: SERNY KLAUS , PACHECO MILEXI
Published: May 2021

The integration between catalytic chemistry and reaction engineering fields generate more efficient catalytic reactor designs whereby the conventional design strategies should be changed. This work evaluated the implications on preliminary fixed bed catalytic reactor design and its associated basic cost from bench-scale when it is considered the material balance at microscale under a deterministic model accompanied with heuristic considerations on equipment design showing that understanding chemical reaction engineering is key to design of more efficient and economical industrial processes (decrease in 50 % of equipment sizing and 40 % of the equipment cost for this study).
DEVELOPMENT OF QUICK RETURN MECHANISM FOR EXPERIMENTATION USING SOLIDWORKS
Authors: ADEKUNLE NURUDEEN OLATUNDE , OLADEJO KOLAWOLE ADESOLA , SALAMI ISMAILA OLASUNKANMI , ALABI ADEWALE OREOLUWA
Published: May 2021

Quick Return Mechanisms (QRMs) are one of the essential accessories used in machine tools which involve reciprocating cutting action with a quick return stroke and a constant angular velocity of driving crank. The aim of this work was to simulate, design and construct a prototype of a QRM that can be used for demonstration and instrumentation. The QRM was simulated using Solidworks and a prototype was developed from the simulated results. The experiment was conducted using the prototype. The kinematic simulation of the Solidworks model was compared with the kinematics of motion of the prototype. The result showed that the Percentage Stroke Length error was 0.36%. It was observed that, there was no significant difference in the simulated and experimental results, hence, the prototype can be used for demonstration and experimentation to assist students in understanding basic principles of the machine operation.
STUDY ON THE INFLUENCE OF WELDER’S FATIGUE ON THE QUALITY OF WELD LINES
Authors: LUNGU DIANA , ACSINTE ALEXANDRU , SCHNAKOVSZKY CAROL , HERGHELEGIU EUGEN , RADU CRINA
Published: May 2021

In this paper a case study is presented, based on certain exercises applied to different welders, to evaluate the influence of welder’s fatigue on the quality of welding. The performed test was aimed at evaluating the technical performance (the welding act) of subjects, as well as the accuracy of weld lines. Five modules of exercises were applied. The exercises of each module were various, they were of medium level, so that they were neither overburdened, nor unsolicited, because both situations could lead to accidents due to fatigue. A weld line was performed after each exercises’ module. The visual quality of welding was appreciated according to the EN ISO 17637:2011 standard.
A SYSTEM DYNAMICS MODEL TO DETERMINE THE VALUE OF INVENTORY HOLDING COST
Authors: ODEDAIRO BABATUNDE OMONIYI , ALABA EMILOLA HELEN , EDEM INYENEOBONG
Published: May 2021

Traditionally, Inventory Holding Cost (IHC) is assumed to be a combination of several costs and determined by the summation of these cost components. Several authors have suggested that the value of IHC ranges between 12-50% of the procurement cost of an item. However, due to the absence of a generally acceptable methodology, many practitioners still determine this percentage based on estimates, benchmarks and intuition. Giving considerations to this reality, a mathematical model to determine the value of IHC using systems dynamics approach was developed. IHC was viewed holistically to identify relevant quantities, their interactions (static or dynamics), behaviour and consequences. A Causal Loop Diagram (CLD) was developed to establish the relationship among these quantities. Thereafter, CLD was transformed into a Flow Diagram (FD). FD was used to formulate a set of systems dynamics equations to obtain IHC. The interaction among fraction of goods ordered per month (FOM), fraction sold per month (FSM) and fraction damaged per month (FDM) was simulated to obtain percentage values of IHC. The value of IHC obtained from the model and simulation analysis ranges between 22.58-25.39% of the item held in stock. Based on these results, it is concluded that the developed model can be used for simulation and system analysis of the holding cost component of an inventory system under different contextual settings.
ASSESSMENT OF MALIR RIVER WATER QUALITY AND IT SUITABILITY FOR IRRIGATION PURPOSES
Authors: SALEEM MUHAMMAD
Published: May 2021

Malir river, which is passing through industrial area of mega city Karachi is assessed for the suitability of its water for irrigation purposes. It was found that the concentration of studied metals is a function of position and season. Most of the pollutants are within the limits provided by national and international standards however, nickel was above the allowable limit for irrigation water quality (1000 μg/L) which is probably attributed to the discharge of effluent from vegetable-ghee manufacturing factories working in the vicinity. The overall suitability of Malir river based on EC, TDS and SAR is ranked’Permissible’ for irrigation.
MATHEMATICAL MODEL OF RESOURCE-SAVING PRODUCTION TECHNOLOGY OF BAKED GOODS WITH AMARANTH FLOUR
Authors: SHISHKIN ANASTASIA , SADYGOVA MADINA , BELOVA MARIA , KIRILLOVA TATYANA
Published: May 2021

Amaranth is a promising raw ingredients enriching bakery products, in the work used grade “Flight” Saratov breeding.  The article discusses the effect of amaranth flour and the type of liquid that goes into the dough baking on the baking properties of the semi-finished product and the quality of the finished products from wheat flour with a satisfactory quality gluten. The moisture, acidity, porosity, structural and mechanical properties, gas-forming ability, lift and fermentation activity were investigated. For the manufacture of comparable samples used wheat flour, presented on the market of Saratov. Amaranth seeds of the variety “Flight” in the amount of 7, 10, 15 and 20 %. Analysis of the effect of amaranth flour on the structural and mechanical properties of the dough showed that adding 7% or more of amaranth flour significantly reduces the spreading of the dough. The index of fermentation activity of semi-finished products with the share of amaranth flour 20%, 15%, 10% and 7% was significantly higher than the control, at the beginning of fermentation. The introduction of amaranth flour in an amount of 7 to 20 % had a significant impact on the gas-forming ability of the wheat-amaranth dough and was characterized by an intense, “explosive” beginning of fermentation and a fairly rapid decline in fermentation intensity over time, especially in a sample with a share of amaranth flour 7 %. Kneading on goat milk whey had a positive effect on the studied parameters. According to the research results, the expediency of using flour from amaranth variety Flying in the technology of bakery products made from wheat flour with a satisfactory weak gluten in quality to give them functional properties has been proved. Based on the mathematical model, the optimal parameters of the process are determined: the amount of amaranth flour in the recipe for buns is 15 %, fermentation time - 85 min, dough kneading liquid - goat milk serum.
EXPERIMENTAL AND NUMERICAL INVESTIGATIONS ON THE STABILITY OF CYLINDRICAL SHELLS
Authors: BAKSA ATTILA , GONCZI DAVID , KISS LASZLA PETER , KOVACS PETER ZOLTAN , LUKACS ZSOLT
Published: May 2021

The stability of thin-walled cylindrical shells under axial pressure is investigated. The results of both experiments and numerical simulations are presented. An appropriate finite element model is introduced that accounts not only for geometric imperfections but also for non-linearities. It is found that small geometrical imperfections within a given tolerance range have considerable negative effect on the buckling load compared to perfect geometry. Various post buckling shell shapes are possible, which depend on these imperfections. The experiments and simulations show a very good correlation.
EFFECT OF TEMPERATURE, HUMIDITY AND IRRADIANCE ON SOLAR POWER GENERATION
Authors: ONAIFO FRANK , OKANDEJI AKPOFURE ALEXANDER , AJETUNMOBI OLAMIDE , BALOGUN DAVID
Published: May 2021

This paper studies the effect of temperature, humidity and irradiance on the power generated by a photovoltaic solar cell. This was achieved using pyranometer for determining the solar radiation, wet and dry thermometer for measuring humidity, and digital multimeter for voltage and current measurement. The result of the study show that power generation increases with increase of solar irradiance. Additionally, changes of humidity level and temperature do not significantly affect solar power generation. Furthermore, it was also observed that high temperatures and higher humidity levels accelerate the corrosion process on the solar cells which reduces the efficiency of the cells.
Unpacking Decoloniality and Decolonial Education: South Africa and the World
Authors: Maart Rozena
Published: May 2021

In this article I unpack the terms ‘decoloniality’ and ‘decolonial’ as a means to address their respective histories in the South African context whilst also drawing on key examples within the global South. Many countries in the global South share histories of usurpation, coloniality and brutality at the hands of the same European colonisers. So, I offer, with overlaps, examples of the early stages of Portuguese, Dutch, British, Spanish, Italian and German colonialism, and their attempts at enslavement and colonisation. Whilst colonisation was for Europeans an escape from poverty, warfare, famine and disease, the pro- mise of immediate and continued wealth through usurpation, settler-coloniality and the acquisition of raw materials through forced slave labour in Africa and the Americas, it secured their prosperity into the eighteenth and nineteenth cen- turies, the afterlife of which they remain beneficiaries to, and which historical texts fraudulently offer them praiseworthy mention as empire builders.
Gnediç Seyahatnamesinden İzlenimler: Bir Rus Sanat Tarihçisinin Gözüyle 1894'te İstanbul
Authors: KÖK Elif
Published: May 2021

19. yüzyılın sonlarından itibaren Rus kültür ve sanat dünyasının çok yönlü sanatçı kişiliklerinden olan Petr Petroviç Gnediç, pek çok edebi eser ve çeviriye imza atmasının yanında, Rus dilinde hazırlanan ilk sanat tarihi külliyatının da yazarıdır. Zengin kültürel altyapısıyla, özellikle Batı dünyasını ve Batı sanatını yakından tanımasına karşılık, Doğu ve İslam dünyasına dair bilgileri daha kısıtlıdır; 19. yüzyılın sonlarında gerçekleştirdiği birkaç günlük İstanbul seyahati, Gnediç’in zihninde bir Osmanlı sanatı ve mimarisi konsepti oluşmasına zemin hazırlamıştır. İstanbul’da 1894’te yaşanan büyük depremin hemen ardından gerçekleşen bu seyahatin yazılı ve görsel tanıklığı, hem o günlerin İstanbul’unu betimlemekte, hem de şehrin kültürel mirasına bir Rus sanat tarihçisinin bakış açısını sunmaktadır. Gnediç, çok sayıda gravürle birlikte yayınladığı kitabında, hem depremin yarattığı hasarlara değinir, hem de şehrin Bizans ve Osmanlı mimarlık mirasına dair dikkate değer yorumlar sunar. Özellikle geç dönem Osmanlı mimarisine yönelik yorumları, dönemin birçok seyahatnamesinden daha sert vurgular içerir. Sadece bir dönem tanıklığı olarak değil, aynı zamanda dönemin Rus aydınlarının gözündeki Osmanlı dünyası algısını yansıtan bir metin olarak da okunabilir ve bu anlamda, zengin seyahat literatürü birikimi içinde, özellikle de sanat tarihçisi gözüyle, dikkat çekici bir yazılı ve görsel belge olarak değerlendirilebilir.
Beneficiation of Talc-Magnesite Ore with Cu-Co Mineralization
Authors: BREZÁNI Ivan , SISOL Martin , MARCIN Michal , SÝKORA Maroš , MAŤAŠOVSKÝ Michal , VARGA Peter
Published: May 2021

Magnesite ore with a low chalcopyrite – cobaltite mineralization was subjected to a series of separations designed to evaluate thepossible concentration of the two accessory minerals. Although the Cu-Co grade in the ore (> 0.01% Co, > 0.1% Cu) is significantlylower than the typical economic grades, content of the main valuable mineral for which the ore is mined and processed incombination with a listing of cobalt as a critical raw material, coupled with their higher price might compensate for the additionalbeneficiation stages. The ore was first crushed and subsequently classified to -100 μm and +100 -400 μm size fractions. The finefraction was upgraded by froth flotation processing in laboratory froth flotation cell. The coarser fraction was processed in severalseparation stages including gravity separation on shaking table, magnetic separation and corona electrostatic separation. The sameprocedure was also repeated with a higher-grade sample as a verification of the procedures. Preliminary results suggest that theaccessory minerals can be separated from the talc-magnesite ore and individual mineral concentrates with about 19% Co and 28%Cu were prepared. However, further work must be done to achieve desirable recoveries for the processing to be economically viable.
Presença de Padre Penido
Authors: Moura Odilão
Published: May 2021

Quem folhear os números da Revista Eclesiástica Brasileira e do periódico Vozes de Petrópolis das décadas de quarenta e cinquenta, neles encontrará artigos de um assíduo colaborador. Assinava esses artigos admiráveis o Padre Maurílio Teixeira-Leite Penido. Dos seus oito livros escritos apenas um não foi publicado pela Editora Vozes Limitada. Ligava-o forte amizade aos franciscanos de Petrópolis, sobretudo a frei Constantino Koser, que naqueles tempos com ele dedicava-se a elevados estudos sobre o mistério da SS. Trindade, e conjuntamente se entregavam ao aprimoramento da cultura do clero. Hoje, o humilde e edificante filho de São Francisco, após tantos anos de exercício de Geral da Ordem, recorda, a quem lhe pergunta dos tempos de contato com Penido, lúcido e amável, a grande sabedoria do nosso sacerdote petropolitano...
Data Mining, Machine Learning, Deep Learning, Chemometrics. Definitions, common points and Trends (Spoiler Alert: VALIDATE your models!)
Authors: Amigo José Manuel
Published: May 2021

Concepts like Machine Learning, Data Mining or Artificial Intelligence have become part of our daily life. This is mostly due to the incredible advances made in computation (hardware and software), the increasing capabilities of generating and storing all types of data and, especially, the benefits (societal and economical) that generate the analysis of such data. Simultaneously, Chemometrics has played an important role since the late 1970s, analyzing data within natural science (and especially in Analytical Chemistry). Even with the strong parallelisms between all of the abovementioned terms and being popular with most of us, it is still difficult to clearly define or differentiate the meaning of Machine Learning, Data Mining, Artificial Intelligence, Deep Learning and Chemometrics. This manuscript brings some light to the definitions of Machine Learning, Data Mining, Artificial Intelligence and Big Data Analysis, defines their application ranges and seeks an application space within the field of analytical chemistry (a.k.a. Chemometrics). The manuscript is full of personal, sometimes probably subjective, opinions and statements. Therefore, all opinions here are open for constructive discussion with the only purpose of Learning (like the Machines do nowadays).
EVALUATION OF THE COMMUNITY-BASED ECOTOURISM DEVELOPMENT STATUS IN THE AKSU-JABAGLY NATURE RESERVE, KAZAKHSTAN
Authors:   China and University of the Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Beijing 100049, China, AKBAR Imanaly , MYRZALIYEVA Zabira Kazbekkyzy ,   SILK WAY International University, Department of Modern History of Kazakhstan and Geography, Kazakhstan, TAZHEKOVA Akmaral Zhaksybekkyzy ,   South Kazakhstan State Pedagogical University, Department of Geography, Shymkent 160000, Kazakhstan, SAULEMBAYEV Altynbay Tagabaiuly ,   South Kazakhstan State Pedagogical University, Faculty of Natural Sciences, Kazakhstan, KENZHEBAY Rabiga Nokerbekkyzy ,   South Kazakhstan University named after M.Auezov, Department of Biology and Geography, Kazakhstan
Published: May 2021

Many stakeholders believe that developing community-based ecotourism (CBET) in vulnerable nature reserves is an effective method of ensuring greater conservation of natural and cultural resources, empowering host communities, and improving their socio-economic well-being. This paper assesses the current status of the CBET development in the Aksu-Jabagly nature reserve (NR), located in the south part of Kazakhstan. In order to understand ecotourism development status, 222 representative households from two neighboring communities of Aksu-Jabagly NR were surveyed with 5-point Likert scale questions. At the same time, two tourism relevant experts were interviewed. The results of examining the three indicators (community tourism relevance, community participation rank, and community empowerment), showed that the neighboring community relevance with the tourism in AksuJabagly NR was low, the community residents' participation rank in tourism was also at the lower level, and the community’s empowerment status is not ideal. As a result, we initially asserted that the status of CBET development in Aksu-Jabagly NR is not well, in particular, the positive economic and social impact of tourism development is not so obvious.
Hubungan Antara Minat Belajar Dengan Resiliensi Matematis Pada Masa Pandemi COVID-19
Authors: Murni Viviana , Dewi Rofina , Jehadus Emilianus , Sugiarti Lana
Published: May 2021

Penelitian ini bertujuan untuk mengetahui hubungan antara minat belajar dengan resiliensi matematis siswa dalam menerapkan flipped classroom pada masa pandemi covid-19. Jenis penelitian yang digunakan adalah penelitian  kuantitatif dengan pendekatan korelasional. Populasi penelitian merupakan seluruh siswa kelas XI TKJ di SMK Informatika Santu Petrus Ruteng tahun ajaran 2020/2021 berjumlah 124 siswa, sedangakan sampel diambil menggunakan teknik simple random sampling dengan jumlah sampel sebanyak 55 siswa. Teknik pengumpulan data dilakukan dengan metode angket. Data dianalisis menggunakan analisis regresi linear sederhana dengan  untuk menghitung signifikansi regresi. Berdasarkan hasil analisis regresi diperoleh persamaan Ŷ = 46.04 + 0.56X t_hitung = 11.62 dan t_tabel = 2.00 maka H_o: ρ = 0 ditolak dan H_1: ρ> 0 diterima. Ini berarti, koefesien regresi (b = slope = 0.56) sangat signifikan. Sementara itu besarnya kontribusi variabel X terhadap Y yaitu r ^ 2 x 100% = (0.8474512 x 100% = 75.75%, Berdasarkan data tersebut, disimpulkan bahwa semakin tinggi minat belajar siswa, maka semakin tinggi pula resiliensi matematis siswa. Sebaliknya, semakin rendah minat belajar siswa, maka semakin rendah pula resiliensi matematis siswa