bluuebunny/crossref_metadata_2025 huggingface dataset:
Liquid phase dehydration of methyl phenylcarbinol to styrene
Authors:   Kazan National Research Technological University, Sitmuratov Tulkinbek S. , Petukhova Lyubov A. ,   Kazan National Research Technological University, Petukhov Alexandr A. ,   Kazan National Research Technological University
Published: March 2021

The industrial styrene production by the method of vapor-phase methylphenylcarbinol (MPhC) dehydration was introduced for the first time in our country within the joint propylene oxide and styrene production consisting OAO «Nizhnekamskneftekhim» facility. This process makes it economically feasible to obtain a combined product – propylene oxide and styrene. However, continuous process exploitation at the OAO «Nizhnekamskneftekhim» facility allowed revealing a number of significant faults caused by economic and environmental factors toughening. First of all it is high energy consumption due to high process temperature and high water steam consumption for steam dilution, which affects the increase in the cost of production. In almost all technological scheme areas of this production, high boiling by-products, so-called high boiling components, are formed. One of these problem solution versions is the transfer of production to a new technology of styrene production by MPhC dehydration, which is carried out in the liquid phase at lower temperatures (up to 190 °C) using new homogeneous highly selective catalysts that exclude the by-products formation, including high-boiling components. The principal advantage of this technology is to reduce the cost of marketable styrene by reducing energy costs (heat, recycled water, water vapor, fuel gas, electricity), reducing the metal consumption of the technological scheme and increasing styrene production by reducing the amount of waste. The comparative tests results with three samples of homogeneous catalysts activity in the MPhC dehydration into styrene process are presented in the work. The tests were carried out under conditions of periodically and continuously operating laboratory installations made of glass, equipped with dosing, condensation, separation and collection systems for reaction products. Quantitative composition of reaction products is identified by chromatography methods. As a result of the conducted tests, in the presence of the used catalysts, the process control modes were selected, and the installations efficiency was checked.
Characteristic of stationary phases for gas chromatography
Authors:   Samara National Research University, Kholin Andrey Y. , Finkelshtein Elena E. ,   Samara National Research University, Kurbatova Svetlana V. ,   Samara National Research University
Published: March 2021

The methods of preferred stationary phases choosing the used in gas-liquid chromatography are analyzed. It is shown that in the literature, such criteria as selectivity, sorption capacity, thermal stability, reproducibility of properties, operating temperature range, etc. are used as criteria for choosing suitable stationary phases. One of the most used methods for characterizing stationary phases is their classification using chromatographic polarity based predominantly on the values of polarity factors proposed by Rorschneider and Mc Reynolds. The basis of these systems is the characterization of various types of intermolecular interactions into which stationary phases can enter, using a set of standard substances. The system of Rorschneider-McReynolds polarity factors is also the basis of the spectral approach to identifying the components of complex mixtures, the essence of which is to use the combination of physicochemical characteristics of the sorbate and sorbent, which allows to establish the structure of sorbate molecules based on their different ability to be sorbed by stationary phases of different chemical nature. The spectral approach is applied to the characterization of weakly polar stationary phases of various chemical nature. It was shown that despite the close chromatographic polarity of the stationary phases, the retention of substances belonging to different classes of compounds can significantly differ and be determined by the values of descriptors characterizing the types of intermolecular interactions and the tendency of the stationary phases to a certain type. Spectra of 5 stationary phases obtained using the Rorschneider, Mac-Reynolds, and Lafffort solubility factors are presented. It was established that the possibility of preferential retention of sorbates of various chemical nature is determined by the ratio between the values of these descriptors. The possibility of choosing the corresponding stationary phases for the selective separation of sorbates of various chemical nature is shown.
Multicomponent non-aqueous electrolytes for high temperature operation of supercapacitors
Authors:   National University of Science and Technology “MISiS”, Astakhov Mikhail V. , Puntusova Ludmila A. ,   National University of Science and Technology “MISiS”, Galymzyanov Ruslan R. ,   National University of Science and Technology “MISiS”, Krechetov Ilya S. ,   National University of Science and Technology “MISiS”, Lisitsyn Alexey V. ,   National University of Science and Technology “MISiS”, Stakhanova Svetlana V. ,   D. Mendeleev University of Chemical Technology of Russia, Sviridenkova Natalia V. ,   D. Mendeleev University of Chemical Technology of Russia
Published: March 2021

Multicomponent non-aqueous electrolytes based on cyclic carbonates and tetraethylammonium tetrafluoroborate have been developed for the operation of supercapacitors at elevated temperatures. Propylene carbonate, which has a high dielectric constant and a high boiling point, was used as the main solvent of electrolytes. However, a significant drawback of propylene carbonate is its high viscosity, which leads to decrease in the electrical conductivity of electrolytes based on it compared to electrolytes based on acetonitrile. To increase the electrical conductivity, an additional component was introduced into the electrolyte – a cosolvent with the necessary set of properties. When choosing cosolvents, two approaches were used. In the first case, to increase the dielectric permittivity of the liquid phase, ethylene carbonate having a higher dielectric constant than propylene carbonate was introduced into the electrolyte. This approach made it possible to significantly increase the electrical conductivity of the electrolyte and to achieve high resource stability of the supercapacitor. The values of the specific capacitance and energy of the supercapacitor with the introduction of ethylene carbonate in the electrolyte practically did not change. In the second case, butyl acetate, which has a low viscosity but has a moderate polarity and a sufficiently high boiling point, was used as a co-solvent. In this case, not only an increase in the electrical conductivity of the electrolyte was observed, but also a significant increase in the capacitive characteristics of the supercapacitor. It is shown that the use of a mixture of cyclic carbonates and esters as a solvent in the composition of the electrolyte can increase its specific conductivity by 40%, and the specific energy consumption of a supercapacitor by 20%. The developed electrolytes provide long-term operation of supercapacitors both at room temperature and at elevated temperatures up to 80 °С.
Investigation of temperature effect on the electrical conductivity of solutions inorganic salts in ethanol
Authors:   I.N. Ulyanov Chuvash State University, Petrukhina Vera A. , Konnova Ksenia A. ,   I.N. Ulyanov Chuvash State University, Yakimova Maria V. ,   I.N. Ulyanov Chuvash State University, Koltsov Nikolay I. ,   I.N. Ulyanov Chuvash State University
Published: March 2021

The electrical conductivity of the solutions depends on the nature of the solute and solvent. For a solvent, the main parameter is the dielectric constant. Since the dielectric constant of alcohols is much less than the dielectric constant of water, the electrical conductivity of alcoholic solutions of salts is less than the electrical conductivity of their aqueous solutions. Therefore, alcoholic solutions of inorganic salts are weak electrolytes. We previously studied the electrical conductivity of inorganic salts in a number of alcohols (ethanol, propanol-2 and butanol-1) at room temperature. It is of interest to study the effect of temperature on the electrical conductivity of salts in alcohols. Obviously, an increase of temperature salt solutions leads to an increase in their electrical conductivity. To study the temperature dependence of the electrical conductivity of aqueous solutions electrolytes, we proposed an approach based on the study of the effect of temperature on the equivalent electrical conductivity of solutions at infinite dilution λ∞. Using this approach, we studied the electrical conductivity of aqueous solutions of a number of inorganic salts, carboxylic acids, and amino acids as a function of temperature. It has been established that for these solutions the dependence λ∞(Т) is described by the exponential Arrhenius equation λ∞ = Аexp(-E/(RT)). However, such studies have not been conducted for alcoholic salt solutions. In this regard, this article explores the possibility of describing the experimental data λ∞(Т) for solutions of certain inorganic salts in ethanol by this equation. It is shown that the Arrhenius equation with the found activation energies adequately describes the temperature dependence of the ultimate equivalent conductivity for solutions of a number of inorganic salts (chloride and calcium nitrate, cadmium iodide, lithium and potassium chloride, chloride, iodide and ammonium nitrate, silver nitrate and sodium bromide) in ethyl alcohol.
Investigation of temperature effect on the electrical conductivity of alcohol solutionssodium and potassium alcoholates
Authors:   Chuvash State University of I.N. Ulyanov, Petrukhina Vera A. , Fedorov Pavel I. ,   Chuvash State University of I.N. Ulyanov, Konnova Ksenia A. ,   Chuvash State University of I.N. Ulyanov, Yakimova Maria V. ,   Chuvash State University of I.N. Ulyanov, Koltsov Nikolay I. ,   Chuvash State University of I.N. Ulyanov
Published: March 2021

Earlier, we studied the electrical conductivity of inorganic salts in a number of alcohols (ethanol, propanol-2, and butanol-1) at room temperature and found that alcoholic solutions of inorganic salts are weak electrolytes. It is known that an increase in the temperature of salt solutions leads to an increase in electrical conductivity due to an increase in the mobility of their ions in the solvent medium. To study the temperature dependence of the electrical conductivity of aqueous solutions of electrolytes, we proposed an approach based on the study of the effect of temperature on the equivalent electrical conductivity of solutions at infinite dilution λ∞. Using this approach, we studied the electrical conductivity of aqueous solutions of a number inorganic salts (nitrates, acetates, and phosphates), carboxylic acids, and amino acids as a function of temperature. It was found that for these solutions the dependence λ∞(Т) is described by the exponential Arrhenius equation λ∞ = Аexp(-E/(RT)). This equation was used to describe the temperature dependence of the ultimate equivalent conductivity for solutions of a number of inorganic salts (calcium and nitrate calcium, cadmium, lithium and potassium iodides, chloride, iodide and ammonium nitrate, silver nitrate and sodium bromide) in ethanol. This article investigated and demonstrated the possibility of describing the experimental data λ∞(Т) for solutions of ethylates, propylates and isopropylates of sodium and potassium in the corresponding alcohols (ethylates in ethanol, propylates in propanol, isopropylates in isopropyl alcohol) using the same equation.
Including new media adaptations and fan fiction writing in the college literature classroom
Authors: Romero Erika
Published: March 2021

Fan artworks may be used to engage college students in their literature courses. One such course is described herein, focused on reading, watching, and analyzing children's and young adult literature and their new media adaptations, including fan fiction, fan vids, and fan art. Rather than only requiring academic writing assignments, students were also assigned the task of writing their own piece of fan fiction in response to a course text.
Acafan identity, communities of practice, and vocational poaching
Authors: Garner Ross Peter
Published: March 2021

In a conceptualization and critique of the implications motivating a set of teaching and learning sessions designed to introduce undergraduate students to the professional role of location scouts and managers, two main interventions are offered. First, discussion of acafan identities is advanced by considering how this subject position applies to teaching and learning contexts rather than individual research dispositions, with acafans transferring competencies developed through fan practices that appropriate industry-located forms of knowledge to inform pedagogical design. Second, the concept of vocational poaching is applied as an alternative of fannish appropriation that acafans can engage in when designing teaching and learning sessions. Vocational poaching involves individual acafans performing tactical raids on industrially located forms of knowledge via fan practices such as location visiting and using these to satisfy the requirements of neoliberal teaching policies.
Critical pedagogy and visual culture art education in a cosplay-based curriculum
Authors: Dyer Connor
Published: March 2021

Although cosplay may be defined simply as the act of dressing up as a popular culture character, this definition fails to convey the criticality, identity exploration, and craft involved. Critical pedagogy and visual culture art education can together form the bases of a cosplay curriculum designed to promote critical thinking about interaction with popular culture and fandom, to explore the construction of identity, and to use cosplay as a form of artistic practice.
Fandom and pedagogy in a time of pandemic
Authors: Anderson Crystal S.
Published: March 2021

The Covid-19 pandemic caused a number of instructors to move to emergency remote teaching. In the process, many instructors worried about being able to replicate the instruction of their face-to-face courses. Instructors can use strategies used by fans to promote engagement with course material, build community, and deploy technology in ways that promote their learning goals and enhance learning in online courses.
"Theme park fandom: Spatial transmedia, materiality and participatory cultures," by Rebecca Williams
Authors: Baker Carissa
Published: March 2021

Review of Rebecca Williams, Theme park fandom: Spatial transmedia, materiality and participatory cultures. Amsterdam: Amsterdam University Press, 2020, hardcover, €99 (260p), ISBN 9789462982574.
Wealth and heteronormative romance tropes in Harry Potter fan fiction
Authors: Sapuridis Effie
Published: March 2021

Analysis of canon/fanon cocreation focusing on the fetishization of extreme wealth in the fanon genre of "Pureblood for a Day" fic.
"Everybody hurts: Transitions, endings, and resurrections in fan cultures," ed. Rebecca Williams
Authors: Lowe JSA
Published: March 2021

Review of Rebecca Williams, editor. Everybody hurts: Transitions, endings, and resurrections in fan cultures. Ames: University of Iowa Press, 2018, paperback $80 (260p) ISBN 9781609385637; e-book $80 ISBN 9781609385644.
Teaching fan fiction: Affect and analysis
Authors: Conrad Kathryn , Hawley Jamie
Published: March 2021

We reflect on the design and first iteration of an asynchronous online university English course focused on fan fiction, with a particular focus on the anticipated challenges of negotiating affect and analysis in the classroom and the structure of the course.
Fan studies pedagogies
Authors: Booth Paul , Lee Regina Yung
Published: March 2021

Editorial to "Fan Studies Pedagogies," edited by Paul Booth and Regina Yung Lee, special issue, Transformative Works and Cultures, no. 35 (March 15, 2021).
PDTC ameliorates neuropathic pain by inhibiting microglial activation via blockage of the TNFα-CX3CR1 pathway
Authors: Li Xilei , Ye Zhi , Guo Qulian , Wang E , Pan Yundan
Published: March 2021

Previous studies have suggested that pyrrolidine dithiocarbamate (PDTC), a nuclear factor κB (NF-κB) inhibitor, play a role in deterring nerve injury-induced neuropathic pain (NP) The activation of NF-κB pathway may contribute to spinal microglial activation, CX3CR1 and tumor necrosis factor-alpha (TNF-a) up-regulation. The aim of this study was to clarify whether PDTC could inhibit the development of neuropathic pain via decreasing TNF-a-induced CX3CR1 up-regulation. Sprague-Dawley rats were randomly divided into sham group and NP group. Rats in each group were treated with intrathecal infusion of PDTC (100 or 1000 pmol/d) or saline. The sciatic nerve chronic constriction injury (CCI) model was used to induce NP in rats. Mechanical stimuli and radiant heat were used to evaluate mechanical allodynia and thermal hyperalgesia. Spinal microglial marker OX42 and TNF-a were detected by immunohistochemistry. In vitro BV-2 microglia activation was induced by TNF-a incubation, and the levels of CX3CR1 were assessed by Western blot and reverse transcription-polymerase chain reaction. Pain behavior and immunohistochemistry results showed that intrathecal infusion of PDTC at 100 or 1000 pmol/d prevented the development of mechanical and thermal hyperalgesia, spinal microglial activation and TNF-a expression induced by sciatic nerve CCI in rats. In vitro experiment results showed that PDTC inhibited the TNF-a-induced CX3CR1 up-regulation in BV-2 microglial cells. In conclusion, intrathecal infusion of PDTC could attenuate the pain-related behaviors induced by sciatic nerve CCI through suppressing the spinal microglia activation and TNF-a up-regulation in rats. The NF-κB activation might be responsible for TNF-a-induced CX3CR1 up-regulation in microglia.
Managing a COVID-Positive Health-Care Worker with Recent Suicide Attempt Through Telepsychiatry
Authors: Naskar Chandrima , Grover Sandeep , Sahoo Swapnajeet , Mehra Aseem
Published: March 2021

COVID-19 pandemic has emerged as a major problem for the health-care workers (HCWs). Many HCWs are facing adverse psychological outcomes, during the COVID pandemic. HCWs are not only expected to carry out duties in COVID areas but are also expected to stay in isolation during the period of quarantine. Various models have been proposed to address the psychological issues in HCWs using telepsychiatry. However, there are no clear-cut guidelines, for managing people with suicidal behavior. In this report we present a HCW, diagnosed with recurrent depressive disorder, current episode severe depression without psychotic symptoms, who attempted self-harm and was shortly diagnosed with COVID-19 infection leading her to getting admitted in the COVID-19 ward. She was managed with supportive psychotherapy during her COVID ward stay through telepsychiatry. We discuss the challenges faced and how these were handled.
Patient satisfaction with regional anaesthesia and general anaesthesia in upper limb surgeries
Authors: Suresh Priyanka , Mukherjee Akash
Published: March 2021

Background and Aims:

An important assessment of the quality of health care is patient satisfaction. However, only few studies are available which look into this aspect. The primary objective of this study was to compare patient satisfaction between regional anaesthesia (RA) and general anaesthesia (GA) in patients undergoing upper limb surgeries. The length of hospital stay and duration of analgesia between the two techniques were the secondary objectives.

Methods:

This cross-sectional study was carried out in a tertiary care teaching hospital. Patients aged between 18 years and 60 years, of physical status American Society of Anesthesiologists (ASA) grade 1–3, undergoing upper limb surgeries were included in the study. Patient satisfaction with anaesthesia was assessed in patients receiving GA and RA, with 100 patients in each group, at least 24 h after the surgery with a 10-item predesigned peri-operative questionnaire. The continuous variables were compared between the groups using Mann–Whitney–Wilcoxon test, and for categorical variables Chi-square test was used.

Results:

The patients in group RA showed significantly higher satisfaction scores than those in GA (P < 0.001) with respect to all the 10 items of the questionnaire and the total score. Duration of analgesia was also significantly longer in RA than GA (P < 0.001). Duration of hospital stay was also significantly longer in GA than in RA (P < 0.001).

Conclusions:

RA for upper limb surgeries provides better patient satisfaction than GA, along with a longer duration of analgesia and lesser duration of hospital stay.
The clinical learning environment in anaesthesiology in Kerala---Is it good enough?---A web-based survey
Authors: Pavithran Priyanka , Kaniyil Suvarna , Rajesh M C , Venugopal Vijish , Jitin T N , Davul Azeem
Published: March 2021

Background and Aims:

Evaluation of postgraduate (PG) training is important so that necessary modifications can be made. The quality of anaesthesiology teaching in our country has not been explored. We performed a survey among the anaesthesiology PGs of Kerala to assess their perceptions about their learning environment as well as to look for the deficits in the training program.

Methods:

An online web-based survey was conducted. The questionnaire was developed after a detailed validation process and circulated via Google forms. The questionnaire had three parts. First part asked for demographic details. Second part had 22 statements in four domains to evaluate the quality of training, which were to be answered based on a five-point Likert scale. The third part asked for the suggestions of the trainees on changes to be made for the improvement in quality of their training.

Results:

The response rate was 64%. The social atmosphere was perceived positively in general by our PGs. Majority of them received feedback on their work and had a regular class schedule. Only 34% of the residents got training in non-technical skills. More tutorials and case discussions were the most common change suggested by the residents. Lack of research training and training in simulation labs were the major lacunae identified.

Conclusion:

The clinical learning environment (CLE) was perceived to be of medium to high quality by the anaesthesiology PGs of Kerala. Lack of routine assessments and regular academic sessions were reflected in the responses.
A prospective study of the quality and duration of analgesia with 0.25% bupivacaine in ultrasound-guided erector spinae plane block for paediatric thoracotomy
Authors: Jambotkar Tejaswini C , Malde Anila D
Published: March 2021

Background and Aims:

Pain of open thoracotomy is treated with systemic analgesics, thoracic epidural and paravertebral blocks which have associated adverse effects and complications. Research shows ultrasound guided erector spinae plane block (US-ESPB) as a simpler and safer alternative. As paucity of data of US-ESPB in paediatric thoracotomies exists. We aimed at studying the analgesic efficacy of US-ESPB for paediatric thoracotomy.

Methods:

In a prospective observational study, 30 children, 1-12 years age undergoing thoracotomy with decortication under general anaesthesia with US-ESPB were observed. At induction, patient received intravenous (IV) fentanyl 3 μg/kg for analgesia and standard general endotracheal anaesthesia was administered. US-ESPB was given at fourth thoracic vertebral level with 0.25% bupivacaine 0.3 ml/kg. Changes in haemodynamic parameters at skin incision, rib retraction, pleural incision, intercostal drain insertion, and skin closure were noted. Intraoperatively, additional fentanyl was administered, if required and its dose and time were noted. Postoperative pain was assessed by visual analogue scale (VAS) (0-10) for ≥6 years and by face, leg, activity, cry, consolability (FLACC) score (0-10) for <6 years at post extubation, 30 minutes and hourly postoperatively. Descriptive statistical analysis was done using Statistical Package for the Social Sciences (SPSS) version 20.

Results:

Additional analgesic was not required in 14/30 patients (46.67%) intraoperatively and within 6 hours (7.4 ± 1.26) post-operatively. Five of the remaining 16 patients, required IV 1 μg/kg fentanyl only once intraoperatively. Median pain score was 2 in first four postoperative hours.

Conclusion:

US-ESPB provided effective supplemental intraoperative and postoperative analgesia in nearly half of the paediatric thoracotomy patients.
Crescents in Kidney Biopsy – What Do They Imply? A Clinicopathologic Study of 40 Cases in a Tertiary Care Center
Authors: Chauhan Shivangi , Jain Sonal , Garg Neha , Dixit Sonali , Sharma Sonal
Published: March 2021

Introduction:

Crescents in glomeruli mean proliferation of parietal epithelium of Bowman's capsule with the presence of macrophages, lymphocytes, neutrophils, fibrin, and collagen. When crescents are present in >50% of nonfibrosed glomeruli, it is called crescentic glomerulonephritis (CGN). The presence of crescents is indicative of poorer prognosis. CGN can be pauci immune (PI), immune complex mediated (ICM), and anti-glomerular basement membrane (anti-GBM) disease.

Aim:

The aim was to study the clinicopathological spectrum of CGN over a period of 10 years in our center.

Materials and Methods:

Forty kidney biopsies with the presence of crescents over a period of 5 years were retrieved retrospectively from the histopathology records of the department of pathology. The clinical history, laboratory parameters, histopathology report, and the direct immunofluorescence (DIF) findings were analyzed.

Results:

Totally 40 cases had crescents on light microscopy. Out of these, 17 cases qualified for CGN. The mean age of the patients was 20 years. Nephritic syndrome was the most common presentation in these 17 cases. The mean creatinine level was 3.55 mg/dL. PI (7/17, 41.1%) was the most common category, followed by ICM (6/17, 35.2%) and anti-GBM (4/17, 23.5%). Out of the ICM, two cases were of IgA nephropathy with crescents and one of lupus with crescents.

Conclusion:

PI is the most common type of CGN. DIF examination is essential for exact categorization of CGN. Kidney biopsy in these cases can guide management and benefit patients with timely initiation of aggressive therapy.
تمثيل نظم المعولية المتسقة بواسطة رسوم سريان الإشارات
Authors: علي محمد علي رشدي علي محمد علي رشدي
Published: March 2021

يعرف نظام المعولية المتسق (ن ع و) بأنه نظام سببي أحادي الوتيرة ذو اعتماد حقيقي على كل عنصر من عناصره. ومن أهم طرائق دراسة المعولية لمثل هذا النظام توصيف هذه المعولية باستخدام علاقات معاودة يرتبط بها شروط حدية. تقدم ورقة البحث هذه العلاقات المعاودة والشروط الحدية لست كينونات تتعلق بنظام المعولية المتسق. وهذه الكينونات هي (أ) صيغتان تستخدمان أحرفا أحادية الصيغة تعبران عن نجاح النظام وفشله، (ب) صيغتان جاهزتان للتحويل إلى احتمالين تعبران عن نجاح النظام وفشله أيضا، (ج) صيغتان مقتصرتان على الجمع فحسب تعبران عن معولية ولامعولية النظام. يتم تمثيل كل من هذه الكينونات الست بواسطة رسم لسريان الإشارات غير دوراني (عديم الحلقات). يتماثل رسم سريان الإشارات لكل من نجاح النظام وفشله مع مخطط القرار الثنائي المرتب المختزل (خ ق ث ر خ) الذي يمثل هيكل البيانات الأمثل لدالة بولانية. إن العلاقات البينية التي تربط رسوم سريان الإشارات الناتجة توضح إجراءات مثلى لتنفيذ (أ) التحويل الاحتمالي (التحويل الحقيقي) لدالة بولانية، (ب) عكس أو تكملة دالة بولانية، (ج) تحقيق المنافاة أو التعامدية بين الحدود في صيغة مجموع مضروبات لدالة بولانية. تؤول رسوم سريان الإشارة المدروسة هنا إلى مخططات أنيقة للحالات الخاصة للنظم الوافرة جزئيا (نظم ك من بين ن) وللنظم الحدية (نظم ك من بين ن الموزونة). توحي نتائج هذا البحث بضرورة بعث وإحياء استخدام رسوم سريان الإشارة في دراسة معولية النظم لكل النظم العامة المتسقة وغير المتسقة وكذلك للحالات الخاصة منها.
تطبيق نموذج رياضي لحل مشكلة ملتقطي الطلبات في مستودع شركة بنده للتجزئة
Authors: معن راضي معن راضي
Published: March 2021

جاءت المشكلة في مستودع بنده من تأخير العديد من الطلبات التي يتم شحنها إلى المتاجر. التأخير حدث نتيجة عن النقص في العدد المطلوب من الملتقطين للطلبات في أوقات الطلب المرتفع. من ناحية أخرى، في أوقات انخفاض الطلب، يكون بعض الملتقطين خاملين لفترات طويلة. ونتيجة لذلك، تفقد شركة بنده للتجزئة ولاء العميل، خاصة في ظل التنافس بين الشركات المنافسة، بسبب فشل احتياجاتهم في الوقت المناسب إلى جانب التكاليف الزائدة للملتقطين بسبب أوقات خمولهم. في هذه الورقة العلمية، تم اقتراح نموذج البرمجة الخطية المختلطة (MILP) لتحسين عدد الملتقطين المطلوبين للطلبات. تم تطبيق النموذج مع أربعة سيناريوهات من الحل لتغطية القيود الواقعية في مستودع بنده. وقد أظهرت النتائج الحد الأقصى من التوفير في تكاليف الملتقطين السنوية بنسبة 27? بالإضافة إلى تقليل عدد الملتقطين بدوام كامل بنسبة 50? بمساعدة من الملتقطين الخارجيين. وأشارت الورقة أيضا إلى توصيات للشركة للحفاظ على مزاياها التنافسية في سوق التجزئة.
Trapeziometacarpal osteoarthritis – a stepwise therapeutic approach
Authors: Nuessle Nils C. , Vögelin Esther , Hirsiger Stefanie
Published: March 2021

Osteoarthritis of the trapeziometarcarpal joint, also called rhizarthrosis, is a common finding in the second half of life. It has a higher prevalence in females and is of growing importance in ageing societies. A variety of conservative and surgical treatment options are known, including conservative treatment up to joint replacement. Without treatment, rhizarthrosis can lead to disabling pain and loss of hand function. The goal of this overview of treatment options is to present a stepwise approach that can be initiated by any physician.
Treatment of trapeziometacarpal osteoarthritis should be started early with conservative measures such as splinting and physical therapy, which can be supplemented by oral and topical analgesics and local infiltrations subsequently. If all of these interventions do not provide sufficient relief, referral to a hand surgeon should be considered.
Surgical strategies vary from arthroscopic debridement over trapeziectomy, with or without tendon interposition and ligament reconstruction, to interposition implants and total joint replacements. The planned intervention should be based on clinical and subjective functional limitations and associated degenerative changes, as well as the patient’s expectations and needs.
The goal of this paper is to develop a treatment algorithm, leading to higher levels of patient functionality and satisfaction. Below we discuss the current literature and point out key treatment options used in our department.
Predicting Success in a Statistics Course Geared toward Allied Health Students
Authors: Lindsay Keston G.
Published: March 2021

Statistics education is an important component of allied health education.  Although success in statistics courses has been reported for students in fields such as business, nursing and psychology, there is a dearth of literature in students of other allied health science disciplines. As statistics is a gatekeeper course for many of these disciplines, understanding and addressing demographic predictors of success is a crucial step in helping to maintain a diverse healthcare workforce. In this study, ethnicity, gender, their interaction, age, and class format were used to predict 953 success outcomes in a retrospective dataset, with major being used as a random effect.  Ethnicity alone predicted success, with students of other ethnicities having 0.6 times the odds of success as their Caucasian counterparts.  As statistics is a potential gatekeeper course for success in health professions programs, academic instructors, administrators and other stakeholders should take steps to ascertain the incidence and nature of disparities in their settings, as it may play a role in maintaining a diverse healthcare workforce.
ÇÖLYAK HASTALIĞINDA MİKRO BESİN ÖGESİ EKSİKLİKLERİ VE BESLENME ÖNERİLERİ
Authors: TUNÇER Esra , YABANCI AYHAN Nurcan
Published: March 2021

Çölyak; genetik yatkınlığı olan bireylerde glutenin tüketilmesiyle tetiklenen, ince bağırsaklarda inflamasyona neden olan sistemik, immün aracılı bir hastalıktır ve tedavisi glutensiz diyettir. Malabsorbsiyonlar ve glutensiz diyetin bazı besin ögelerini (magnezyum, tiamin, riboflavin, niasin vb.) yeterli miktarda içermemesi nedenleriyle çölyak hastalığında besin ögesi eksiklikleri görülebilir. Bu derlemenin amacı, çölyak hastalığında mikro besin ögesi eksiklerini literatür kapsamında incelemektir. Çölyak tanısı sırasında sık görülen mikro besin ögesi eksikleri demir, kalsiyum, magnezyum, D vitamini, çinko, folat, niasin, B12 vitamini, riboflavin şeklinde sayılmaktadır. Sonuçta, çölyak hastalığında vitamin-mineral eksikliklerinin tedavisi için glutensiz diyete uyum ile optimal beslenmenin sağlanmasının gerekliliği görülmektedir. Ayrıca, gereken durumlarda hekim kontrolünde besin takviyesi alınmalıdır.
Novos contextos pedem novas posturas
Authors: Pestana dos Santos Douglas Manoel Antonio de Abreu , Dijan Coqui Alexandre
Published: March 2021

Este artigo foi constituído a partir da reflexão sobre o que seria as ruínas de um processo avaliativo decadente e ultrapassado. Vivemos em um novo momento educacional, o uso das tecnologias de informação e comunicação são estruturas que ampliam o universo do conhecimento e são renovadas a cada segundo. O novo contexto educacional já reclamava por novas posturas avaliativas, no entanto, o novo cenário agravado pelo afastamento social e o novo formato de aula durante a pandemia causada pelo COVID-19, surgiram como um ponto que encerra um modelo obsoleto e inicia uma nova jornada pedagógica. Contudo, há necessidade de conhecer o que realmente significa avaliação. Este texto resgata publicações antigas para provar que já temos um norte como referência, o que nos falta é atentarmos para os diversos trabalhos já publicados e perceber que precisamos mudar. A partir do que se vive na atualidade é inegável pensar que novas medidas no processo avaliativo já eram discutidas, faltava-nos ouvir e admiti-las diante das boas práticas em educação.

 

Palavras-chave: Avaliação. educação. Pandemia.
L’impact des situations d’intégration sur les résultats des élèves marocain·e·s
Authors: TAHIRI ABDELAADIM
Published: March 2021

Cette étude analyse l’impact de la pédagogie de l’intégration sur le rendement scolaire des élèves de la 6e année du primaire dans la région de Gharb Chrarda Bni Hsan au Maroc. Les données sont recueillies au moyen d’un questionnaire. Celui-ci est destiné à un échantillon d’enseignant·e·s représentatif de la région. La comparaison des pourcentages des moyennes générales des élèves à l’issue des examens normalisés des années 2009 (avant l’application de la PI ) et 2011 (année de la généralisation de celle-ci) nous permet de repérer l’impact de la PI sur le rendement scolaire des élèves. Les résultats obtenus montrent qu’au niveau régional, l’application de la PI n’a pas affecté de manière significative les moyennes générales des élèves. Toutefois, des distinctions sont à faire : devant un progrès remarquable chez les élèves en arabe et en mathématiques, nous notons une baisse de niveau en français. Ces résultats montrent que beaucoup d’efforts sont encore à fournir par les différents partenaires pédagogiques pour que la Pédagogie de l’intégration ait un effet positif plus manifeste.
Les symboles traditionnels bambaras dans « Ségou » de Maryse Condé
Authors: NDIHOKUBWAYO CLÉMENT , MANIRAMBONA FULGENCE
Published: March 2021

Cet article analyse, à travers quelques symboles bambaras présents dans l’univers fictionnel de Ségou de Maryse Condé, la réactualisation des valeurs traditionnelles de ce peuple. Ségou est en effet le lieu fictif de prédilection où se manifestent le sacré et le divin à travers le tata, le tabala, le dubale, le balanza et l’eau. Le tata, qui signifie « terre », conjointement avec le tabala, tambour de guerre, sont des symboles de pouvoir. Toutefois, ce pouvoir est contraint à la chute. Le tata est violé et le tabala réduit au silence. L’islam détrône les divinités traditionnelles et édicte ses lois. Le dubale et le balanza sont des arbres sacrés, avatars respectivement des esprits des ancêtres et de Pemba, un des dieux créateurs selon la cosmogonie bambara. Ces arbres sont des gardiens de la société traditionnelle bambara. Ils jouent soit le rôle de médiateur entre l’humain et le divin, soit celui des dieux eux-mêmes. L’eau, autre élément de l’univers symbolique de Ségou, est la forme visible du dieu Faro qui, avec Pemba qu’incarne le balanza, participe à la création et joue le rôle protecteur et régulateur de la vie du peuple. Tout au long du roman, l’eau du fleuve Niger est régénératrice en vertu de la toute-puissance de Faro qu’elle héberge.
Estimation of Serum Copper and Zinc Levels among Tuberculosis Patients in Khartoum State
Authors: Eltoum Ali Abdalla
Published: March 2021

Background: Trace elements play an important role in tuberculosis infection because their deficiencies can be associated with impaired immunity. The aim to assessment the serum copper and zinc levels among the tuberculosis patients in Khartoum state
Material: This is cross sectional study was conducted in Aboanja hospital in Khartoum state during the period from November 2016_January 2017.Citrated samples were collected from 100 study group , 50 tuberculosis patients , and 50 apparently healthy Individuals, Serum level of Zinc and Copper was measured by atomic absorption spectrometry.
Result: The result is the mean level of Zinc in tuberculosis patients were significant decreased when compared with control group (P. value= <0.001) and also the mean level of Copper in tuberculosis patients significant increase when compared with group ( P. value = <0.001).
Conclusion: This study showed significant decrease in level of Zinc and increase in level of Copper once compared with control group among tuberculosis patients.

Keywords: Copper, Impaired immunity, Trace element, Tuberculosis, Zinc
ROUTE FINDING FOR FACILITATING TRANSPORTATION PLANNING TO MAINTAIN SMOOTH PRODUCT FLOW IN SUPPLY CHAIN
Authors:   University of Sindh, Pakistan., Memon Muhammad Ali
Published: March 2021

Purpose- To gain more profit and market share, manufacturers wish to mobilize as many resources as they can to satisfy every manufacturing order. As manufacturing is nowadays distributed to several sites, where each site manufactures the intermediate product to assemble the final product. Methodology- Producers, therefore require to transport these products between these sites as well as distribute the final products to faraway customers. Therefore, production and transportation planning need to be coordinated. Manufacturing requires the planning of unmovable resources (machines) with fixed sequences of production routing steps, however transportation requires the planning of moveable resources (Vehicles). Findings- Each transport request is different from another with different origin and destination. Hence, it is needed to find the routing (route from origin to destination) of each transport request dynamically. Practical Implications- This paper is dedicated to present a route finding tool called Path Finder in order to provide the shortest route by distance or time or both for transportation planning.
THE ROLE OF BUSINESS RISK AND NON DEBT TAX SHIELDS ON CAPITAL STRUCTURE: A STUDY BASED ON CEMENT SECTOR IN PAKISTAN
Authors:   Institute of Business Management, Karachi., Joyo Muhammad Asif
Published: March 2021

Objective- The objective of this study is to determine the influence of Business risk and Non Tax shield on Capital structure. Methodology- This study is based on panel data of20 companies from the cement sector of Pakistan. Panel regression is applied for statistical analysis. Conclusion- This study concludes that business risk and non-tax shield has insignificant effect on capital structure (debt to equity ratio), whereas the interest coverage has positive effect on debt to equity ratio. Policy Implication- As per this study the volatility and business risk involved in the cement sector may have some serious issues if the exports is continuously decline and at the same time raising leverage funds may hurt the performance of the company.
REASONS AS TO WHY CONSUMER PREFERS ONE BRAND OVER ANOTHER: A STUDY OF PACKAGED MILK IN HYDERABAD USING BLIND TESTS
Authors:   Shaheed Zulfikar Ali Bhutto Institute of Science and Technology, Karachi., Khuhawar Khizer Hayat
Published: March 2021

Purpose--This paper highlights the changing trends in the consumption patterns of consumers in Hyderabad with regard to packaged milk Methodology--The society here is getting educated, which paves way for the packaged milk firms to market the benefits of their product and warn their consumers of the harm of the loose milk. Findings--The paper concludes with the proportion of factors that influence people in Hyderabad about preferring a brand over another. Practical Implications--This research paper tends to inform the firms in the packaged milk industry about the increasing demand of their product and the ways they can cope up with the upcoming demand.
IMPACT OF KNOWLEDGE SHARING AND ORGANIZATION INNOVATIVE CAPABILITIES ON FIRM PERFORMANCE - MEDIATING IMPACT OF CORPORATE ENTREPRENEURSHIP
Authors:   Bahauddin Zakariya University, Multan., Hasnain Amna
Published: March 2021

The main purpose of this study is to investigate the mediating impact of corporate entrepreneurship on the relationship between knowledge sharing, organizational innovational capabilities and firm performance. Rapid change in technology and the world being a global village has forced organizations to change their way of doing business. Organizations require developing new products, improving production process and capturing new markets to survive against local and international competition. Pakistani organizations are losing their market share in local and internationals markets due to their inability to meet continuously increasing customer demands. This study will helps these organizations to understand the importance of knowledge sharing, innovation and corporate entrepreneurship in their performance. The data were collected from service sector industries by using a close ended questionnaire. Results show that knowledge sharing and organizational innovative capabilities have a positive impact on firm performance while corporate entrepreneurship more strengthens this impact. It is recommended for organizations to create the knowledge sharing environment in the organization through awareness sessions and to teach employees how knowledge sharing can collectively benefit them and the organization. Organizational culture should welcome new ideas and opportunities and strive to achieve continuous excellence.
Hemorroidopexia con sutura mecánica. Indicaciones en el 2021
Authors: Piccinini Pablo , Avellaneda Nicolas , Carrie Augusto
Published: March 2021

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THE EFFECT OF OUT-OF-CLASS READING TASKS ON DEVELOPING EFL WRITING SKILLS
Authors: Dülger Osman
Published: March 2021

This study aims at investigating the relationship between out-of-class reading activities and writing in English as a foreign language. A quasi-experimental pre-test- post-test research design without a control group was used to assess the effect of reading a novel and reading news as out-of-class reading activities on writing achievement. The research results were triangulated with open-ended questions asking participant views about their out-of-class reading tasks. 40 students of an ELT Department at a Turkish university participated in the study. The students were divided randomly into two groups and group A was asked to read a novel while group B was asked to read news as out-of-class reading tasks, for a month. The participants’ writing achievements were tested through two writing tasks, as a pre-test and post-test, in terms of content, organization, vocabulary, language use, mechanics and total scores. The pre-test and post-test scores did not display statistically significant differences between the A and B groups either in total scores or in scores of specific dimensions of the assessment. The participants in group A displayed statistically significant improvement in terms of organization, vocabulary, and language use while the participants in group B demonstrated improvement in content, organization, vocabulary, and language use. The qualitative data verified the quantitative findings, and provided views about different features of the tasks. Some suggestions for further research on the role of various factors that affect the development of writing skills, and the relationship among different language skills are provided.

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Effects of dietary κ-carrageenan on growth and resistance to acute salinity stress in the black tiger shrimp Penaeus monodon post larvae
Authors: Jumah Yashier U. , Tumbokon Barry L.M. , Serrano Augusto E.
Published: March 2021

Acute salinity stress happens unnoticed in shrimp ponds and there is a need to protect the animals by providing dietary functional ingredients that will elicit resistance to this stress. k-Carrageenan, a sulfated polysaccharide from red seaweed, is reported to trigger innate immunity in vitro and in vivo in shrimps. The present study aims to evaluate its potential as growth-promoter and its immune-enhancement effects against salinity stress. Three separate experiments were done: (a) an attractability test; (b) a 30-day feeding trial to determine optimal inclusion of k-carrageenan, and (3) acute salinity stress test. Results of the attractability tests showed that all the experimental diets did not differ in their attractability to the shrimps. In the feeding trial, 5 groups of post larval shrimp were fed with 5 experimental diets containing various inclusion levels of k-carrageenan, namely, 0.0, 0.15, 0.30, 0.45, and 0.60 g kg-1. Results showed that the final average body weight (FABW), weight gain (WG), and specific growth rate (SGR) and feed conversion efficiency (FCE) values of shrimps in the 0.15 and 0.3 g kg-1 were significantly higher than that of the control group; the values of those in 0.45 and 0.60 g kg-1 groups were not significantly different from those of the control group. Protein efficiency ratio (PER) values, in contrast, were not significantly different from each group. Optimal inclusion level in the diet of k-carrageenan was 0.29 g kg-1. In the acute salinity stress test, 5 groups of shrimps were fed with the same 5 experimental diets as those in the feeding experiment for 2 weeks, transferred them from 21 ppt salinity media to 4 ppt. Results showed that the control group exhibited significantly highest mortality rate while in the 0.6 g kg-1 group the lowest; each group were significantly different from each other. Mortality rate decreased with increased dietary k-carrageenan level in a linear fashion. In conclusion, the study demonstrated that the the diets containing dietary k-carrageenan was equally as attractive as the basal/control diet and that k-carrageenan showed both growth-promoting and immune-stimulating effects against acute salinity stress in the black tiger shrimp P. monodon post larvae.