bluuebunny/crossref_metadata_2025 huggingface dataset:
Aeroelastic Analysis Using Deforming Cartesian Grids
Authors: Boschitsch Alexander H. , Whitehouse Glen R.
Published: January 2023

Ongoing work in air-vehicle design illustrates the potential of advanced concepts to provide significant improvements in efficiency; but with their incorporation of lightweight flexible structures, such configurations may require active control systems to ensure reliability and safety. However, many contemporary analysis methods are inefficient for aeroelastic analysis and design of such configurations. This paper describes the development of a new approach that automates the geometry setup, mesh generation, and assembly of fluid–structural coupling interfaces to enable efficient aeroelastic and aeroservoelastic analysis of advanced concepts. The core elements for this approach are a cut-cell Cartesian grid-based computational fluid dynamics solver, a nonlinear beam element structural model, a conservative fluid–structural interface treatment, and the formulation and implementation of a new deforming grid capability within the cut-cell Cartesian grid solver. Herein, emphasis is on this latter component with detailed description given of the mesh motion strategy, evaluation of fluxes and structural loads at the surface, and computation of geometrical properties such as cell volume, directed face areas, centroids, and motion-induced fluxes for deforming Cartesian grids required to advance the flow states. Aeroelastic simulations exercising the capability show favorable agreement with data and predictions in the literature for subsonic and supersonic applications.
Physics-Infused Reduced-Order Modeling of Aerothermal Loads for Hypersonic Aerothermoelastic Analysis
Authors: Vargas Venegas Carlos , Huang Daning
Published: January 2023

This paper presents a novel physics-infused reduced-order modeling (PIROM) methodology for efficient and accurate modeling of nonlinear dynamical systems. The PIROM consists of a physics-based analytical component that represents the known physical processes and a data-driven dynamical component that represents the unknown physical processes. The PIROM is applied to the aerothermal load modeling for hypersonic aerothermoelastic (ATE) analysis and is found to accelerate the ATE simulations by two to three orders of magnitude while maintaining an accuracy comparable to high-fidelity solutions based on computational fluid dynamics. Moreover, the PIROM-based solver is benchmarked against the conventional proper-orthogonal decomposition/kriging surrogate model and is found to significantly outperform the accuracy, generalizability, and sampling efficiency of the latter in a wide range of operating conditions and in the presence of complex structural boundary conditions. Finally, the PIROM-based ATE solver is demonstrated by a parametric study on the effects of boundary conditions and rib supports on the ATE response of a compliant and heat-conducting panel structure. The results not only reveal the dramatic snapthrough behavior with respect to spring constraints of boundary conditions but also demonstrate the potential of the PIROM to facilitate the rapid and accurate design and optimization of multidisciplinary systems such as hypersonic structures.
Fraction Frequency and Random Scanning Mode for Electron Beam Thermal Assessment
Authors: Yao Hongxin , Wang Xiyao , Ye Hong
Published: January 2023

Development of thermal assessment technology is crucial to the security assessment of hypersonic vehicles. A strategy of high-precision reconstructions of nonuniform heat flux and temperature field characteristics of a hypersonic vehicle surface by a scanning electron beam is constructed, and a fraction frequency and random scanning mode that can significantly reduce the temperature fluctuation of materials is proposed. The reconstruction effects in this scanning mode are successively investigated in the HIFiRE-5b flight condition and the reentry condition of the capsule of Apollo 6, showing that the reconstruction accuracies of the heat flux and temperature fields are within 2 and 5%, respectively, and the temperature history is accurately reconstructed with an amplitude of temperature fluctuation below 11 K. This research is expected to promote the electron beam thermal assessment to reconstruct the thermal boundary conditions of hypersonic vehicles more realistically.
Absolute Nodal Coordinate Formulation-Based Shape Sensing Approach for Large Deformation: Plane Beam
Authors: Wu Maoqi , Tan Shujun , Xu Hao , Li Jianle
Published: January 2023

The inverse finite element method (IFEM) is currently one of the most studied methods in the field of shape sensing, in other words, the reconstruction of the displacement field of a structure from discrete strain measures. The current research is still insufficient in applying IFEM to flexible structures undergoing large deformation that are in increasing demand, especially in terms of computational efficiency. Hence, an element-by-element IFEM approach based on absolute nodal coordinate formulation (ANCF) is developed in the paper. Taking the plane beam as the object, a class of gradient-deficient ANCF plane beam element is introduced to provide a concise nonlinear nodal displacement/strain relationship. Similar to IFEM, the inverse ANCF (IANCF) plane beam element is obtained in the form of least-square formulation, which means IANCF describes the deformation reconstruction problem as a nonlinear optimization problem. Because the computational complexity of solving nonlinear optimization problems increases rapidly with the increase of the number of decision variables, an element-by-element solution algorithm that solves each element relatively independently is adopted, and the explicit iterative formula is given by the Newton method. Besides, a curvature continuity constraint is introduced to improve the well-posed-ness of this problem and the smoothness of the reconstructed shape. Through numerical analysis, IANCF exhibits remarkable accuracy in various deformation degrees and its insensitivity to the weight factors inherited from IFEM. In the experiment conducted with surface-mounted distributed optical fiber sensors, the effectiveness of IANCF for practical structures is verified.
Mechanisms of Morphing Wall Flow Control by Traveling Waves over an Airfoil
Authors: Ogunka Uchenna E , Akbarzadeh Amir M , Borazjani Iman
Published: January 2023

The main two mechanisms of morphing wall flow control are direct injection of momentum in the streamwise direction and indirect momentum transfer via triggering instabilities. Traveling waves have been shown to perform better than standing waves, probably because they can use both mechanisms. However, the relative importance of the two mechanisms is not known. To differentiate between the mechanisms, a range of parameters (frequency, amplitude, and starting location) at stall (15 deg angle of attack) and poststall (20 deg angle of attack) is tested using wall-resolved large-eddy simulations with a sharp-interface curvilinear immersed boundary method at a low Reynolds number of [Formula: see text] over a NACA0018 airfoil. The results of the simulations demonstrate that the flow is reattached within a range of nondimensional frequencies, actuation amplitudes, and starting locations of oscillation at the stall and poststall angles of attack. Significant lift enhancement and drag reduction are also observed within these ranges. The nondimensional frequency range at which the flow is reattached is found to be similar to the dominant nondimensional frequencies of leading-edge vortex shedding of the unactuated airfoil. These indicate that the indirect transfer of momentum is the dominant mechanism because direct injection of momentum increases with the increase of amplitude and frequency; that is, separation should reduce as they increase. Nevertheless, direct injection of momentum improves the performance relative to pure excitations of standing waves when instabilities are triggered.
Investigation into Effect of Residence Time on Cooling Characteristics of RP-3
Authors: Zhang Yifeng , Cao Yong , Feng Yu , Zhang Deming , Qin Jiang
Published: January 2023

Efficient utilization of chemical heat sinks and enhancement of heat transfer are key issues for the thermal protection of advanced hypersonic flight vehicles. However, the influences of residence time on the pyrolysis and convection heat transfer of hydrocarbon fuel are different, which is important for the design and optimization of cooling systems. Therefore, a multidimensional numerical simulation model based on a molecular reaction model of aviation kerosene, RP-3, is established. This model reveals that the residence time has a great influence on the heat sink and heat transfer characteristics under the supercritical condition. With the increase of the residence time, the chemical heat sink and physical heat sink increase, whereas the convective heat transfer coefficient decreases. The heat transfer is not only affected by flow structures but also by the ratio of the chemical heat sink to the physical heat sink. With the increase of the residence time, this ratio first increases and then decreases. It has a maximum value, and the residence time corresponding to this maximum value is exactly the residence time when the total chemical heat sink rate reaches the maximum. A correlation predicting the maximum heat sink ratio is proposed based on these data.
Machine Learning Strategy for Wall Heat Flux Prediction in Aerodynamic Heating
Authors: Dai Gang , Zhao Wenwen , Yao Shaobo , Chen Weifang
Published: January 2023

The efficient and accurate prediction of the aeroheating performance of hypersonic vehicles is a challenging task in the thermal protection system structure design process, which is greatly affected by grid distribution, numerical schemes, and iterative steps. From the inspiration of the theoretical analysis and machine learning strategy, a new wall heat flux prediction framework is proposed first by establishing the relationship between the wall heat flux and the flow variables at an extreme temperature point (ETP) in the normal direction of the corresponding wall grid cell, which is named the machine learning (ML)-ETP method. In the training phase, the flow properties and their gradients at the ETP and the distance from the ETP normal to the wall are employed as feature values, and the accurate wall heat flux predicted by the converged fine grid is regarded as the tag value. With the assistance of the trained regression model, the heat flux of the same configuration with a coarse grid in the wall-normal direction could be predicted accurately and efficiently. Moreover, test cases of different configurations and inflow conditions with a coarse grid are also carried out to assess the model’s generalization performance. All comparison results demonstrate that the ML-ETP strategy could predict wall heat flux more rapidly and accurately than the traditional numerical method due to its nonstrict grid distribution requirements. The improvement of the predictive capability of the coarse-graining model could make the ML-ETP method an effective tool in hypersonic engineering applications, especially for unsteady ablation simulations or aerothermal optimizations.
Heat Flux Identification of Aircraft Structure with Artificial Neural Network Compensation
Authors: Wu Tingting , Zhang Chao , Ji Hongli , Zhang Yupeng , Tao Chongcong , Qiu Jinhao
Published: January 2023

Aerodynamic heating measurement of reusable hypersonic vehicles has always been an important aspect of hypersonic vehicle design. In this paper, a mechanistic-model-based heat flux identification method with artificial neural network (ANN) compensation is established to determine the spatially distributed heat flux of the aircraft structure. A one-dimensional heat conduction model is used to estimate heat flux by a robust and efficient algorithm integrating Tikhonov regularization with Levenberg–Marquardt method. The one-dimensional estimated heat flux has large errors for not considering multidimensional heat conduction effects. The proposed mechanistic-model-based method is then utilized to compensate the multidimensional heat conduction by ANN. The performance of the proposed method will be assessed by the determination of the heat flux of a two-dimensional plate and aircraft structure. Results show that compared with the one-dimensional inversion results, ANN compensation method can significantly improve the accuracy of estimated heat flux and is also applicable for larger levels of heat flux. The proposed compensation method is an effective technique to identify the nonuniform surface heat flux of multidimensional structures.
Pelatihan, Pemberdayaan Wasit dan Dampaknya Terhadap Prestasi Atlet
Authors: Jaelani Rusani
Published: January 2023

Pelatihan bagi Wasit merupakan salah satu upaya meningkatkan pengetahuan, keterampilan dan sikap. Namun demikian pelatihan tanpa pemberdayaan tidaklah mungkin meningkatkan kinerja wasit dan berimbas pada prestasi atlet. Tujuan penelitian ini untuk mengetahui hasil pelatihan terhadap pemberdayaan dan prestasi olahraga serta dukungan dari pelatihan dan pemberdayaan dampaknya terhadap prestasi atlet. Metode penelitian menggunakan metode survey dengan desain cross sectional survey. Hasil penelitian mengungkapkan bahwa pelatihan berpengaruh terhadap pemberdayaan dan prestasi atlet. Sedangkan pemberdayaan wasit tidak berpengaruh terhadap prestasi atlet. Pelatihan dan pengembangan merupakan salah satu upaya yang harus dilakukan oleh organisasi dalam meningkatkan pengetahuan, keterampilan dan kepribadian pada SDM yang terlibat di dalam pembinaan prestasi atlet.  Pelatihan SDM mutlak diperlukan untuk semua SDM Keolahragaan bukan hanya untuk wasit karena peran seluruh SDM dalam mendukung prestasi atlet mutlak diperlukan.
Efektivitas Model Pembelajaran Direct Instruction dengan Personalized System For Instruction Terhadap Jumlah Waktu Aktif Belajar Pendidikan Jasmani
Authors: Anjani Mutia , Sugiawardana Ruli , Rezha Mohamad
Published: January 2023

Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh model pembelajaran direct instruction dengan model pembelajaran Personalized System For Instruction terhadap peningkatan waktu aktif belajar pada siswa kelas XI SMA N I Kawali Kabupaten Ciamis. Metode yang digunakan adalah metode eksperimen yaitu Pre-Experimental One-Group Pretest-Postest Design. Populasi yang dipilih sesuai dengan penelitian yang akan diterapkan yaitu siswa SMA N I Kawali Kabupaten Ciamis. Sampel diambil sebanyak 30 orang, selanjutnya sampel tersebut diukur (dites) menggunakan jumlah waktu aktif belajar. Instrumen yang digunakan yaitu penampilan mengajar dengan menggunakan metode observasi sistematis melalui teknik duration recording(Suherman, 2009)Berdasarkan analisis data menggunakan SPSS 22, hasil pengolahan data adalah menunjukkan bahwa kedua model pembelajaran yang diteliti memberikan pengaruh yang signifikan terhadap peningkatan waktu aktif belajar pada siswa kelas XI SMA N I Kawali Kabupaten Ciamis. Model pembelajaran direct instruction dengan model pembelajaran Personalized System For Instruction merupakan model pembelajaran antara yang biasa diberikan (direct instruction) dengan model yang belum terbiasa dilaksanakan oleh guru maupun muridnya yaitu Personalized System For Instruction. Kecenderungan siswa SMA N I Kawali l lebih menyukai Personalized System For Instruction.
New finds of the horse harness elements of the Turkic period from Kyrgyzstan
Authors: Akmatov K. T. , Tabaldiev K. Sh. , Belek K.
Published: January 2023

The paper presents new finds of the horse harness elements of the Turkic period from Kyrgyzstan. The finds consist of: a pair of antler cheekpieces, bridle fragments, a wooden saddle frame, and four iron stirrups. They come from tombs with human-horse burials at the Boz-Adyr medieval cemetery, and a memorial enclosure at Kosh-Dobo in the Ysyk-Kol depression. One stirrup is a stray find from Chui valley. All finds represent widespread, «classical» items of Turkic period archaeology. They display extensive analogies with materials from burial and memorial complexes of the early Middle Ages in the Tien Shan, Altai, Tyva and Mongolia, i.e. from core Turkic cultural regions. However, most of these types of horse harness artifacts were used up to the end of the 1st millennium ACE. Based on comparative analyses, and taking into account their archaeological context, the horse harness artifacts can be dated to the VII–IX centuries ACE. Despite the fact that all items generally repeat known forms, some of them are quite unique in a number of details, which, in our opinion, is natural in handicraft production. The new materials significantly expand our understanding of the horse harness used by the Kyrgyzstan population in the early Middle Ages. The archaeological context of the discoveries suggests that their manufacturers and/or users were Turkic tribes during the Western Turkic and Turgesh Khaganates.
Thoracic spine extradural hematoma secondary to thrombotic thrombocytopenic purpura: A case report
Authors: Ferreira Neto Otávio da Cunha , Diniz Andrey Maia Silva , Alencar Neto Joaquim Fechine de , Lemos Nilson Batista , Marques Luis Felipe Ferreira , Alves Neto Luis Bandeira , Lira Arthur Oliveira , Filho Geraldo de Sá Carneiro , Júnior Deoclides Lima Bezerra , Junior Luiz Severo Bem , Filho Hildo Rocha Cirne De Azevedo
Published: January 2023

Thrombotic thrombocytopenic purpura is a rare but a fatal disease with a life-threatening thrombotic microangiopathy. We report a case of 35-year-old male, admitted with abdominal pain and fever, growing into progressive crural spastic paraparesis level II, and urinary retention. On investigations, thoracic MRI showed an extradural hematoma in thoracic spine between T11 and L1 and spinal compression. After 5 days of treatment with glucocorticoids, clinical picture got better. In this condition, we decided to have non-surgical intervention. The literature says that the true correlation between severe thrombocytopenia and spine epidural hematoma formation is unknown due to limited data.
Treatment with Markhamia tomentosa Benth. K. Schum prevents carbon tetrachloride-induced liver damage in rats
Authors: Temdie Romeo Joel Guemmogne , Jidibe Pierre , Galani Borris Rosnay Tietcheu , Vouffo Edwige Ymele Chiogo , Djasrane Arnaud Doumogne , Boumzina Emmanuel Le Fils Doumarsou , Sokeng Selestin Dongmo , Dimo Theophile
Published: January 2023

Objective:

Markhamia tomentosa (Bignoniaceae) is a medicinal plant with several pharmacological properties. However, its hepatoprotective effects have been little studied. The aim of this study was to evaluate the protective effects of the aqueous trunk bark extract of this plant against carbon tetrachloride (CCl4)-induced liver injury in rat.

Material and Methods:

Thirty male albino Wistar rats were divided into six groups (five each) with Groups 1, 2, 3, and 4 as negative (distilled water), normal (distilled water), positive (silymarin 25 mg/kg), and plant extract (50 mg/kg) controls, respectively. Groups 5 and 6 were used as test groups and were given plant extract (25 or 50 mg/kg, respectively). Rats were pretreated once a day for 14 days orally with different substances. CCl4 (0.5 mL/kg, i.p.) was administered on days 4 and 11 to all groups except Groups 1 and 4, to induce hepatitis. The rats were then sacrificed on day 15; liver functions and oxidative stress were assessed as well as histopathological changes.

Results:

M. tomentosa extract significantly and dose dependently decreased alanine aminotransferase, aspartate aminotransferase, gamma-glutamine aminotransferase, total bilirubin, total cholesterol, and malondialdehyde values while increasing catalase, and glutathione values compared to the CCl4-treated group. Histological findings showed a reduction in necrosis and inflammatory cell infiltration in the liver while the lumen of distal and proximal tubes was improved in the kidney by the plant extract. These results may be due to some of the major bioactives compounds found in the aqueous extract.

Conclusion:

These findings suggest that the aqueous extract of M. tomentosa may have liver protective effects through its antioxidant and anti-inflammatory mechanisms, supporting thereby its ethnomedicinal uses.
Assessment of microbial strains contaminating the white coat of preclinical and clinical dental students – A comparative cross-sectional study
Authors: Priya Bharathi P M , John Reena Rachel , Sam Nisha
Published: January 2023

Objective:

The objective of the study was to identify the microbial strains contaminating the white coats of pre-clinical and clinical dental students through microbial culture from swabs of the coat. In addition, the study intended to create awareness regarding the contaminated attire among the students.

Materials and Methods:

The cross-sectional study was conducted among 100 students working in the clinical and preclinical labs in the institution. The microbial contamination on the white coat was assessed from swabs using blood agar and MacConkey agar standard techniques. A structured questionnaire was given to the participants to collect demographic data and details about their wearing habits, laundering habits, the habit of exchanging coats, and self-grading about the cleanliness of the white coats.

Results:

The white coats of the clinical students were more contaminated than preclinical students. Chest area 52% (n = 26) of preclinical students was less contaminated than clinical students 80% (n = 40). Gram-positive bacilli 24% (n = 12) were more predominant followed by Gram-negative Cocci 20% (n = 10) in white coats of the study participants.

Conclusion:

The authors concluded that the white coats of preclinical and clinical dental students were significantly contaminated with microbes. Although the awareness of microbial contamination of white coats among the dental students was high, their casual attitude to the coats being a mode of transmission of infection was observed. The study highlighted the importance of implementing government and institution protocols for coat hygiene.
Motivations for choosing dentistry as a career among dental students in Tanzania
Authors: Ndaki Gregory , Owibingire Sira Stanslaus , Sohal Karpal Singh
Published: January 2023

Objectives:

Educators are interested in understanding motivations for choosing a career in the dental field, especially in the current era when there are several career paths to choose from. This study aimed to investigate the motivating factors given by dental students for selecting dentistry as a career in Tanzania.

Material and Methods:

A questionnaire was sent to 256 dental students to capture their sociodemographic characteristics and possible motives for choosing dentistry as a career. The motive/reasons were then grouped into four domains. ANOVA test was done to establish an association between sociodemographic characteristics and reasons for choosing dentistry and the P-value was set at <0.05.

Results:

Out of 256 registered students, 239 returned the filled questionnaires. Opportunities to work anywhere in the world, job and financial security, the opportunity to work with hands, and getting enough time for the family were the commonly agreed motives for choosing dentistry. The age, sex, and upbringing environment of the students had no significant association with the mean score of various domains of motives for choosing dentistry (P >0.05). The odds of selecting dentistry due to professional motives were 2 times higher among those who were in-service (OR = 0.444, 95% CI 0.267, 0.739) and were 3 times higher in those who were in clinical years (OR = 0.292, 95% CI 0.128, 0.666). The odds of selecting dentistry due to vocational motives among those who were in-service were 3 times higher (OR = 0.347, 95% CI 0.153, 0.786).

Conclusion:

The main motives for choosing dentistry as a carrier included the opportunity to work anywhere in the world, job and financial security, and getting enough time for the family.
Association between ABO blood group and COVID-19-positive patients in institutional-based hospital, Coimbatore – A cross-sectional study
Authors: Abhinaya Ananthakumar , Krishnapriya K. , Gowri S. , Dinakar J. , Ann Tryphena E. T
Published: January 2023

Objective:

The novel coronavirus disease (COVID-19) has spread globally and caused 6.5 million death as of October 2022. Risk factors for COVID-19 morbidity and mortality include age, sex, smoking, hypertension, cardiovascular disorders, respiratory disease, and diabetes mellitus. Association between ABO blood groups and number of other infections or disease severity following infections such as SARS-COV-1 and hepatitis B virus has been reported. Rh(D) phenotype (positive and negative Rh blood types) is associated with very few diseases compared to ABO blood group. Various articles have reported the association of ABO blood group and COVID-19. Our aim was to investigate if any association exists in between ABO blood group with Rh phenotype and COVID-19 infection in Coimbatore and with the result an awareness among the public should be created to hasten the preventive measure from further encounter of the infection and help the government in taking a proactive approach to fight COVID-19 in the area. Thus, we conducted a study to find out the association between ABO blood group and COVID-19-positive (SARS-COV-2) patients in institutional-based hospital – Coimbatore which was one of the most affected districts in Tamil Nadu.

Materials and Methods:

This is a single-center, retrospective, observational, and cross-sectional study conducted in a private institutional-based hospital in Coimbatore. The data were collected from around 437 patients’ medical records, who were tested COVID-19-positive between October 2020 and November 2021 whose blood grouping was available as part of investigation. Data were analyzed statistically to correlate the association of ABO blood group, Rh phenotype, and COVID-19 infection.

Results:

In 437 COVID-19-infected patients, the ABO blood group displayed a percentage distribution for A, B, AB, and O at 19% (83), 35% (153), 8.5% (37), and 37.5% (164), respectively and 409 (93.6%) were Rh +ve. Among the patients, blood group O 164 (37.5%), followed by blood group B153 (35%) is observed to be significantly associated with COVID-19 susceptibility, whereas blood group A83 (19%) and AB 37(8.5%) showed lower susceptibility for COVID-19 infection.

Conclusion:

This study did not show any statistically significant association of ABO blood group and Rh phenotype seen in relation to COVID-19 infection.
Lhermitte-Duclos disease: A series of six cases
Authors: Kolhe Ashvini Amol , Shenoy Asha , Tayal Shubhra , Goel Naina Atul
Published: January 2023

The Lhermitte-Duclos disease (LDD), also known as dysplastic cerebellar gangliocytoma, is a rare lesion characterized by variable enlargement of cerebellar folia. The pathological basis of LDD has long been debated, as it has overlapping features of both, a neoplasm and hamartoma. Association between LDD and Cowden syndrome (CS) has been established based on the presence of phosphatase and tensin homologue germline mutation in both. We present a series of six cases of LDD: Four females and two males, aged between 16 and 38 years, presenting with headache and imbalance on walking of 1–7 months duration. Histomorphology showed thickening and vacuolation of the molecular layer, loss of Purkinje cells, and replacement of granular cell layer by large dysplastic ganglion cells. Awareness of histological features of this rare entity and a higher level of suspicion is required for the correct diagnosis, which, in turn, should prompt thorough investigations to exclude features of associated CS. LDD is a rare entity, awareness of its histological features and correlating them with radiology is essential, especially in tiny biopsies; to render the correct diagnosis. Diagnosis of LDD warrants further clinical workup and close follow-up for the associated features of CS.
Kontribusi Santripreneurship Sebagai Potensi Kemandirian Ekonomi Umat di Yogyakarta
Authors: Isti Istiqomah Faiz , Fauzan Fauzan
Published: January 2023

This study aims to determine the role of Islamic boarding schools in promoting entrepreneurship towards the economic independence of the people in the D.I Yogyakarta region. The research method used is literature review by collecting data and information related to Islamic boarding schools with economic independence and santripreneurship through supporting data sourced from national research journals, newspapers, websites, direct interviews with research objects, and social media. The results of the study show that there is support from the government and non-governmental organizations in mobilizing entrepreneurial pesantren, various pesantren have great potential in promoting entrepreneurship with various activities, the role of santri becomes capital in fulfilling the entrepreneurial spirit of pesantren, and pesantren in the DI Yogyakarta region make a positive and empowered contribution for economic independence. people.
Buddhist Cossacks: The Transformation of Traditional Culture in Modern Conditions
Authors: Адрианна Рамзановна Маргоева,
Published: January 2023

Бурятское казачество, важным компонентом идентичности которого является буддизм, возникло в XVII в. и прошло долгий исторический путь. На рубеже XX-XXI вв. на фоне возрождения русского казачьего наследия наследие бурят-казаков остается без должного внимания. Несмотря на то что бурятское казачество формально прекратило свое существование в 1920-1930-х гг., буряты продолжили передавать казачью культуру внутри семьи. Культура эта не материальная, а скорее духовная и связана со стремлением служить государству и защищать его целостность. Однако сегодня буряты предпочтут служить в официальных государственных структурах, чем ассоциировать себя с современным казачеством. Кроме того, акцент на возрождение песенно-танцевальной культуры также не вызывает у потомственных бурят-казаков желания вступать в казачьи общества. Тем не менее, несмотря на определенные трудности, они стремятся отстоять свое право называться настоящими казаками.

The history of Buryat Cossacks traces back to the seventeenth century, and Buddhism always played a paramount role in its development. Against the background of the revival of the predominantly Russian Cossack heritage in the twentieth - twenty-first centuries the heritage of the Buryat Cossacks is under-researched, despite the fact that there is a similar process of renewal among Buryat Cossacks. Although the Cossack identity almost ceased to exist in the 1920s and 1930s, this group of Buryats continued to pass on Cossack culture within the family. This culture is not material, but spiritual, centered in the desire to serve the state and protect its integrity. However, today Buryats prefer to serve in official state structures rather than associate themselves with the Cossack movement. The interest in reviving traditional Cossack songs and dances do not make hereditary Buryat Cossacks want to join Cossack societies. Nevertheless, despite certain difficulties, they do strive to defend their right to be called true Cossacks.
Biographies of Evenks of Northern Buryatia (Based on the Materials of A. S. Shubin)
Authors: Владимир Леонидович Кляус,
Published: January 2023

В статье обсуждается различие устоявшихся в фольклористике и этнологии подходов в использовании «биографического метода»: если при изучении устной словесности исследователи стараются максимально собрать биографические сведения об исполнителях, то для современных этнологических работ часто характерна «зашифровка» данных о респондентах. Особый случай представляют работы А. С. Шубина об эвенках Северной Бурятии, для которого биографии его респондентов и жизнеописания уже ушедших из жизни соплеменников были иллюстрацией изменений их традиционного образа жизни, происходивших в советскую эпоху

The article discusses the difference between well-established approaches in folklore and ethnology that use the “biographical method.” If in the study of oral literature researchers try to collect as much biographical information about the performers as possible, contemporary ethnographers “code” the data about the respondents. A special case is the work on the Evenks of North of Buryatia by A. S. Shubin, for whom the biographies of his respondents and the biographies of his fellow Evenks who had already passed away were used as an illustration of the changes in the traditional way of life that took place during the Soviet era.
جودة خدمة الرعاية الصيدلانية على رضا المرضى في القطاع الصحي الحكومي بالمملكة العربية السعودية
Authors: الخثلان محمد سعود , التركي تركي عبدالعزيز , العفنان أنور ابراهيم , الزغيبي بندر عبدالله , المطيري عبدالرحمن زبن , باقادر ابراهيم محمد , عبده رغد عبدالكريم , الدوسري صفية محمد , المطيري عبدالله زبن , الجريد وفاء داود , الحيدان يوسف صالح
Published: January 2023

هدفت الدراسة إلى التعرف على جودة خدمة الرعاية الصيدلانية على رضى المرضى في القطاع الصحي الحكومي بالمملكة العربية السعودية، والتوصل إلى العلاقة الارتباطية بين جودة خدمة الرعاية الصيدلانية ورضى المرضى في القطاع الصحي الحكومي بالمملكة العربية السعودية، وقد استخدمت الدراسة المنهج الوصفي التحليلي للتعرف على أهداف الدراسة، وقد اشتمل مجتمع البحث في المرضى المستفيدين من الصيدليات بالمستشفيات الحكومية مدينة الرياض في العام 1444هــ، وتكونت عينة الدراسة من (210) مريض مستفيد تم اختيارهم بطريقة العينة العشوائية البسيطة. وقد استخدمت الدراسة الاستبانة كأداة لجمع البيانات. وفي ضوء ما سبق توصلت الدراسة للعدد من النتائج أهمها وجود علاقة طردية (موجبة) ذات دلالة إحصائية ما بين جودة خدمة الرعاية الصيدلانية ورضى المرضى في القطاع الصحي الحكومي بالمملكة العربية السعودية. وفي ضوء النتائج توصي الدراسة بضرورة وضع نظام فعال لتلقي شكاوى المرضى يضمن سرعة الرد عليها وعلاجها لتحقيق التواصل المستمر بينهم وبين إدارة الصيدلية وأو تفعيل صناديق الشكاوى الموجودة بالصيدلية وإشعار المرضى بالتعاطي مع الشكاوى التي يقدمونها. وضرورة كسر الحاجز بين الصيدلي والمرضى وخلق لغة الحوار وتوصية الطواقم الطبية بعدم التحدث مع المرضى لغة أجنبية لا يفهمها.
أثر الأقدمية المهنية على الرضا الوظيفي للممرضين في القطاع الصحي السعودي
Authors: البريكي محمد احمد , القحطاني سعود علي , المطيري نايف عبدالله , الرويس عبدالله نوار , الشغاثر محمد علي , العنزي تركي صياح , الشيحه عبدالله صالح , العنزي منى عبيد
Published: January 2023

هدفت الدراسة إلى التعر ف على مستوى الرضا الوظيفي لدى الممرضين في القطاع الصحي السعودي، والعلاقة بين أثر الأقدمية المهنية على الرضا الوظيفي للممرضين في القطاع الصحي السعودي، وقد استخدمت الدراسة المنهج الوصفي المسحي للتعرف على أهداف الدراسة، وتكون مجتمع الدراسة الحالية من جميع لدى الممرضين في القطاع الصحي الحكومي بالسعودية في العام الدراسي 2022م. وقد بلغ إجمالي عينة الدراسة (346) فرد من مجتمع الدراسة، وقد استخدمت الدراسة الاستبانة للتعرف على أهداف الدراسة. وفي ضوء ما سبق توصلت الدراسة لعدد من النتائج أهمها وجود فروق ذات دلالة احصائية عند مستوى0.05 متوسطات إجابات أفراد مجتمع الدراسة حول درجة مستوى الرضا الوظيفي لدى الممرضين في القطاع الصحي السعودي تعزى لمتغير الأقدمية المهينة، حيث تبين أن الفروق كانت لصالح من أقدميتهم المهنية من 11-15 سنة. وفي ضوء النتائج توصي الدراسة بإجراء دورات تدريبية ومحاضرات تعليمية للممرضين بمؤسسات الصحة في القطاع الحكومي من طرف متخصصين في كيفية مواجهة المشاكل النفسية المهنية التي تواجههم. وإجراء المزيد من الدراسات حول درجة مستوى الرضا الوظيفي على بيئات عملية أخرى "القطاع الخاص" دراسة مقارنة. كذلك إجراء المزيد من الدراسات عن المعوقات التي تسهم في رفع مستوى الرضا الوظيفي في البيئة الصحية والسبل والمقترحات والآليات التي من شأنها أن تعزز مستوى الرضا الوظيفي لدى الممرضين في القطاع الصحي السعودي.
العلاقة التنبؤية بين أبعاد المساندة الأكاديمية والاحتراق الأكاديمي لدى طلبة المرحلة الجامعية في ضوء استخدام التعلم عن بعد
Authors: بريك السيد رمضان
Published: January 2023

هــــدفت الدراســــة الحاليــــة إلــــى معرفــــة مســــتوى المساندة الأكاديمية والاحتراق الأكاديمي لدى طلبة جامعــــة الملـــك ســـعود، بالإضـــافة إلـــى تحديـــد العلاقة التنبؤية بين أبعاد المساندة الأكاديمية والاحتراق الأكاديمي، وتكونــــت عينــــة الدراســــة مــــن (337) طالبــــاً وطالبة (252 من الذكور، و85 من الإناث) وطبـــق علـــيهم مقيـــاس المساندة الأكاديمية ومقيـــاس الاحتراق الأكاديمي (إعـــداد/ الباحـــث)، وانتهـــت الدراســــة إلـــى مجموعـــة مــــن النتـــائج؛ منهـــا: وجود فروق ذات دلالة احصائية عند مستوى (0.05=α) بين متوسطات درجات المساندة الأكاديمية لدى الطلبة بجامعة الملك سعود في ضوء استخدام التعلم عن بعد وفقاً لمتغير الجنس لصالح الطلبة الذكور. وعدم وجود فروق ذات دلالة احصائية عند مستوى (0.05=α) بين متوسطات درجات الاحتراق الأكاديمي لدى الطلبة بجامعة الملك سعود في ضوء استخدام التعلم عن بعد وفقاً لمتغيري الجنس والتخصص الأكاديمي، كمــا كشــفت النتــــائج عن وجـــود علاقـــة خطيـــة عكسية بـــين المساندة الأكاديمية والاحتراق الأكــاديمي، كمــا فسرت المساندة الأكاديمية (11%) مــن التبــاين فـــي الاحتراق الأكــــاديمي لــــدى طلبة جامعــــة الملــــك سعود.
تحسين معدل الاكتشاف في الاتصالات جهاز إلى جهاز (D2D) باستخدام تقنية التحكم بالاستطاعة
Authors: اسعد عصام محمد , السالم عبدالكريم
Published: January 2023

تركز الدراسة على مسألة اختيار الأزواج D2D بالشكل الأفضل مما يساعد في زيادة عدد الأزواج ويخفف عبء الازدحام عن المحطة الخليوية، حيث أن إعادة استخدام الطيف الترددي تعتبر من التحديات الرئيسية التي تواجه اتصالات جهاز إلى جهاز، وخاصة موضوع اختيار أزواج D2D مع الحد الأدنى من التداخل وأفضل ضمان لجودة الخدمة QoS. تم تصميم خلية مع توزيع الأجهزة بشكل عشوائي و اختيار أزواج D2D التي يمكنها التواصل مع تأمين جودة خدمة مناسبة باستخدام خوارزمية تعتمد إعادة استخدام الموارد بحيث يكون لكل DUE تداخل أقل على بعضها البعض، ومن ثم استخدام خوارزمية التحكم بالاستطاعة مع خوارزمية تحديد أزواج الاتصال D2D وذلك من خلال جعل استطاعة ارسال الأجهزة الخليوية المتصلة بتقنية D2D متناسبة مع المسافة فيما بينها بما يؤمن جودة الاتصال دون الحاجة لرفع الاستطاعة تجنباً لحدوث التداخل مع الوصلات المجاورة سواء D2D أو وصلات خليوية . بغرض الحد من التداخل بحيث تؤمن هذه التقنية زيادة في قيمة SINR و زيادة احتمالية تحقق الشروط المناسبة لإنشاء اتصال D2D وبالتالي تحرير موارد الخلية وزيادة جودة الخدمة.
Recognizing the University's Role in Mental Health Promotion
Authors: Eltayeb Shahla
Published: January 2023

Introduction: Mental health is a state of wellbeing that enables individuals to cope and function with daily stressors; hence promoting mental health is an integral part of global public health that aims to maximize individual and societies to attain sustainable development goals. Aim of study: The current study aims to determine the level of universities' actual roles in promoting mental health and the modalities that universities undertake to promote mental health in Saudi Arabia. Materials and methods: This cross-sectional study conducted among eleven Saudi governmental universities, the sample stratified into three categories: employees, faculty members, and students. The study developed and validated a 30 items scale the University Mental Health Promotion Scale is the first scale of its kind in the Arab world designed to measure the level of universities' actual roles in promoting mental health. Results: The University Mental Health Promotion Scale’s showed good validity and reliability with an internal consistency ranged between 0.543 and 0.761 and alpha Cronbach of 0.88. The findings indicate the level of universities' roles in promoting mental health is medium with a mean score (53.05) of (90) degrees. The five mental health promotion subscales showed that creating a supportive environment ranked as the highest (56%) factor promoted by universities, followed by developing personal skills with a relative weight of (51%). Conclusion: Universities are currently promoting mental health through mainly environmental changes; nevertheless, mental health policies, capacity building, and community coordination are yet to be attained. The findings from our study offer important insight to university educators and administrators about the role they can play in better supporting student wellbeing and preventing high rates of psychological distress. We argue that the process of promoting mental health will create a conducive environment and act on students’ sense of inclusion and empowerment, and this is critical given that the goal of improving student mental well-being can only be achieved through effectively promoting mental health in universities.
تحليل محتوى مقرر الرياضيات للصف السادس الابتدائي في ضوء السمات السلوكية للطلبة الموهوبين بالمملكة العربية السعودية
Authors: المتحمي محمد أحمد , المتحمي يحيى خضر
Published: January 2023

هدفت هذه الدراسة إلى التعرف على مدى توافر السمات السلوكية للطلاب الموهوبين اللازم توافرها في محتوى كتاب الرياضات للصف السادس الابتدائي بالمملكة العربية السعودية، ولتحقيق أهداف الدراسة استخدم الباحثان المنهج الوصفي التحليلي، متمثلا بأسلوب تحليل المحتوى، حيث تم تحليل كتاب الرياضيات للصف السادس الابتدائي للفصلين الدراسيين الأول الثاني للعام الدراسي 1443هـ؛ واستخدم الباحثان لهذا الغرض نموذج السمات السلوكية للطلاب الموهوبين (نموذج الترشيح الأولي للبرنامج الوطني للكشف عن الموهوبين) كأداة لتحليل المحتوى حيث تضمنت (31) سمة توزعت على خمسة مجالات رئيسية هي: المرونة العقلية، الاستدلال العلمي والميكانيكي، الاستدلال اللغوي وفهم المقروء، الاستدلال الرياضي والمكاني، والمهارات والقدرات غير الذهنية. وقد أظهرت نتائج الدراسة أن محتوى مقرر الرياضيات للصف السادس يتضمن النسب الآتية: المرونة العقلية بنسبة مئوية تتراوح بين (22.72%- 13.17%) الاستدلال العلمي والميكانيكي بنسبة مئوية تتراوح بين (28.03%- 9.85%)، الاستدلال اللغوي وفهم المقروء بنسبة مئوية تتراوح بين (19.61%- 14.38%)، الاستدلال الرياضي والمكاني بنسبة مئوية تتراوح بين (22.61%- 17.18%)، المهارات والقدرات غير الذهنية بنسبة مئوية تتراوح بين (15.45%- 9.90%)، وتوصلت الدراسة إلى توافر السمات السلوكية بنسبة أقل من المتوسطة. كما أن هناك بعض السمات توافرت بشكل ضعيف جدا وهي الوصول إلى أحكام عامة مبنية على معلومات ونتائج سابقة، التعبير الشفهي بصورة متميزة، استخدام وسائل متعددة لحل مشكلة واحدة. وبناءً على ذلك يوصى الباحثان بضرورة تبنى تلك المظاهر في المقرر لضمان فاعليته.
Pronunciation Difficulties and Challenges in the Field of Research in Jordan
Authors: ناصر Issa Mohammad , حمزة Mohammed Hilmi
Published: January 2023

This paper presents the current evidence regarding English pronunciation challenges and problems in the Jordanian context by reviewing related literature. The present study was carried out to determine the extent to which pronunciation research regarding challenges is carried out in Jordan. The available literature on pronunciation is limited to phonological variances, consonants’ and vowels’ variations, syllable structure differences and similarities, and mother tongue as an effective element. In order to achieve this objective identifying pronunciation difficulties and challenges in the field of research in Jordan, this study followed systematic literature review (SLR) framework adapted from previous studies in this regard. The findings revealed that one of the key problems in learning English language pronunciation is related to the socio-psycho variables e.g., anxiety, self-confidence, motivation, attitudes and so on noting that studies investigated did not present these factors in detail and they focused more on the role of learners’ native language, exposure to language, phonemic variations and vowels, and syllable structures’ differences. Hence, future studies in this regard are recommended to investigate the challenges related to anxiety, self-confidence, motivation, attitudes and their role on affecting pronunciation teaching and learning.
الاضطرابات السلوكية لدى ذوي صعوبات التعلم
Authors: الرباح يارا عبدالرحمن
Published: January 2023

هدفت الدراسة الحالية إلى الكشف عن الاضطرابات السلوكية لدى ذوي صعوبات التعلم وتحديد أساليب التخفيف من حدّتها أو علاجها، استخدمت الدراسة المنهج الوصفي التحليلي، واختتمت الدراسة بعدة نتائج أهمها أن صعوبات التعلم تعدّ اضطراب في العمليات العقلية والنفسية الأساسية تؤثر في القدرة على تعلم القراءة والكتابة والحساب، كما تسبب قصور في تعلم المواد الدراسية المختلفة، أما الاضطرابات السلوكية لدى ذوي صعوبات التعلم فهي الانحراف الواضح والملحوظ في مشاعر وانفعالات الفرد حول نفسه وبيئته بحيث يتصرف الفرد بشكل يؤذي فيه نفسه والآخرين، كما توصلت الدراسة إلى أن صعوبات التعلم تقسم إلى صعوبات نمائية ويقصد بها الاضطرابات الوظيفية في الجهاز العصبي والعمليات النفسية وصعوبات تعلم أكاديمية فهي الاضطرابات التي تحدث في عملية التعلم، كما بينت الدراسة الخصائص التي يتميز بها الطلبة ذوي الصعوبات التعلم مقارنة بأقرانهم العاديين في التعليم العام، كما أظهرت نتائج الدراسة وجود عدد من النظريات الهامة في تفسير أسباب الاضطرابات السلوكية كالنظرية السلوكية ونظرية التحليل النفسي والنظرية البيو فسيولوجية والنظرية البيئة، وتضمنت الدراسة عدة توصيات أهمها ضرورة تقديم برامج تدريبية وندوات لذوي صعوبات التعلم لاكتساب عادات سلوكية جيّدة تساهم في التخفيف من حدّة الاضطرابات السلوكية، وتدعيم قدرات الوالدين لمواجهة الاضطرابات التي يتعرض لها أبنائهم، وعقد دورات تدريبية للمعلمين والمعلمات لتطوير قدراتهم للتعامل مع الطلاب ذوي صعوبات التعلم الذين لديهم اضطرابات سلوكية.
أثر المنافسة بين البنوك على مخاطر السيولة واستدامة الربحية دراسة تطبيقية على البنوك السعودية خلال الفترة (2013-2020)
Authors: عبد الرحمن نجلاء إبراهيم , النفيعي ريا محمد إبراهيم
Published: January 2023

هدفت الدراسة إلى معرفة أثر المنافسة بين البنوك على مخاطر السيولة واستدامة الربحيَة (دراسة تطبيقية على البنوك السعودية)، حيث استخدمت الدراسة المنافسة متغيرًا مستقلًا، كما استخدمت متغيرين تابعين تمثّلا في: مخاطر السيولة واستدامة الربحيَة. وقد تكوّنت عينة الدراسة من البنوك التجارية التقليدية السعودية البالغ عددها ثمانية بنوك، خلال الفترة الممتدة من عام (2013 -2020). واستخدمت الدراسة الإحصاء الوصفي، واختبار هوسمان، وتحليل الانحدار المتعدد لاختبار الفرضيات، وطُبّق لقياس الـمُتغيّر المستقل المنافسة، مؤشر ليرنر اندكس لقياس قوة السوق. أما الـمُتَغيِّر التابع فقد قيست مخاطر السيولة من خلال مخاطر السيولة المصاحبة للأنشطة البنكية التقليدية والأنشطة البنكية الحديثة. ولقياس الـمُتَغيِّر التابع استدامة الرّبحيّة اُعتمد قياس التنوُّع في الدخل، ومعدل العائد على الموجودات، والعائد على الحقوق الملكية؛ لتحقيق الهدف الرئيسي والمتمثل في معرفة أثر منافسة بين البنوك على مخاطر السيولة واستدامة الرّبحيّة من خلال فرضيات الدراسة. توصّلت الدراسة إلى وجود معنوية في تأثير بعض مخاطر السيولة المصاحبة للأنشطة البنكية بدرجة ضعيفة، المتمثّلة في مخاطر السيولة للأنشطة التقليدية. كما تأثرت بمعنوية موجبة مخاطر السيولة (مؤشر الأصول السائلة) . يؤثر مؤشر ليرنر اندكس لمعدّل التنوّع في الدخل بتأثير معنوي سالب. وأثرت درجة المُنافسة على طبيعة نوع الدخل بفائدة والدخل بغير فائدة تأثيرًا معنويًّا موجبًا. ووضّحت الدراسة أن انخفاض المُنافسة بين البنوك التقليدية؛ أدى إلى زيادة الربحية. وتشير الدراسة إلى وجود تأثير معنوي وسالب لمخاطر السيولة (نسبة التوظيف للأنشطة التقليدية) على معدل التنوع في الدخل، ومعدل العائد على الموجودات، ومعدل العائد على حقوق الملكية. وبالإضافة لوجود تأثير معنوي وموجب لمخاطر السيولة (نسبة السيولة السائلة) على معدل العائد على الموجودات. وتظهر الدراسة أن البنوك التجارية تجاوزت الحد الأدنى لمتطلبات مخاطر السيولة وفقاً لمقررات بازل الثالثة لمؤشر تغطية السيولة (LCR) ومؤشر صافي التمويل المستقر (NSFR). وتوصي الدراسة البنوك التجارية التقليدية بالتوسع في توظيف أموالها لتعزيز ربحيتها وتقليل السيولة الفائضة مما يساهم في تحقيق معدلات أكبر لعائد على الموجودات، وعائد على حقوق الملكية. نوصي البنوك التجارية التقليدية في زيادة الربحية الامر الذي يسهم في استدامتها وتعزيز مركزها المالي محافظا بذلك على مكانتها.