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The interaction force between a small magnet and a superconducting sphere is calculated using the method of images. Our approach can be easily verified by applying boundary conditions. This work will possesses and clear the discrepancies found in the literature. For collinear dipoles case (small magnet and its image), we found the elevated force to be dependent on the geometrical dimensions of the problem

Purpose: Atherosclerotic stenosis of the extracranial carotid artery accounts for approximately 20% of all strokes. Both carotid artery endarterectomy and carotid artery angioplasty with stenting (CAAS) are recommended for symptomatic patients with 50% or more stenosis or asymptomatic patients with 70% or more stenosis. CAAS is under-reported in Saudi Arabia, as evidenced by a thorough literature search. In this article, we aim to share our experience of CAAS to call for the necessity of conducting more research on stroke and emphasize the local need of utilizing more endovascular treatments like CAAS.Materials and Methods: A retrospective single-center observational study was conducted at King Abdulaziz Medical City in Jeddah, Saudi Arabia. The inclusion criteria consisted of all adult patients (18 years and above) with carotid stenosis who were treated with CAAS.Results: A total of 16 patients were included in the study. The mean age of the participants was 66.9±13.5 years (range 30–87 years). All patients were symptomatic (had a previous stroke or transient ischemic attack). The procedure was successful in 14 patients (87.5%), while it failed in 2 patients (12.5%) due to technical reasons. All patients had no stroke or myocardial infarction within 30 days of the procedure.Conclusion: Despite the advancement in medicine with free healthcare services in Saudi Arabia, the interventional procedures for secondary prevention of strokes are underutilized. Collaboration between different hospitals will be extremely helpful since few centers in each city are providing such treatments by an expert neurointerventionist and/or strokologist. The good selection of candidates, optimal management of comorbid conditions, and multidisciplinary care may improve outcomes and reduce mortality.

The importance of assessment literacy (AL) among teachers at all educational levels has been of interest for a considerable period. Literature has shown the increasing research surrounding the importance of AL knowledge and its impact on students' performance. This paper examines the level of assessment literacy among instructors on a Saudi higher education university preparatory program. It uses a/the Classroom Assessment Literacy Inventory (CALI), developed by Mertler and Campbell (2005), and a demographic questionnaire to investigate the AL level. It also looks at the impact of factors such as specialty (i.e., subject department), sex, academic qualification, and years of teaching experience on the AL level. The subjects of the study included 54 English and Basic Sciences teachers on the preparatory program. The study found that the level of AL among the participants was inadequate (mean=17). However, there was no significant difference found among the participants when it came to sex, qualifications, or years of experience. The subject department, on the other hand, was found to be a factor that impacted the level of AL. The study concludes with some recommendations related to increasing assessment literacy among in-service teachers and, more importantly, it highlights the importance of contextual factors when evaluating assessment literacy. https://doi.org/10.26803/ijlter.19.5.12

الملخص: أهداف البحث: تتغير المعرفة الطبية باستمرار مما يشكل ضغطا على المعلمين لتكييف استراتيجيات تعليمية مناسبة لأسلوب تعلم طلابهم. لذلك، قد يساعد تحديد أسلوب تعلم طلاب الطب المعلمين في تطوير استراتيجيات التدريس لتحقيق مخرجات أفضل. كان الغرض من هذه الدراسة هو تحديد أسلوب تعلم طلاب جامعة علوم صحية، وتقييم العلاقة بين أسلوب التعلم والرضا عن الأنشطة التعليمية. طرق البحث: أُجْريت هذه الدراسة الوصفية المستعرضة في كليات الطب والعلوم الطبية التطبيقية، بجامعة الملك سعود بن عبد العزيز للعلوم الصحية بجدة. استخدمنا أسلوب ديفد كولب للتعلم والدراسة الاستقصائية المعدلة عن رضا الطلاب من كلية موط للمجتمع في ميشيجن. تم توزيع استبانة ذاتية التعبئة لجميع المشاركين واستخدام أسلوب التعلم والبيانات الديموغرافية كمتغيرات تنبئية. واعتبار مستوى رضا الطلاب المتغير الناتج. النتائج: شارك ٣٥٩ طالبا (متوسط العمر ١٩.٠ +/- ١.٤ عاما، ٥٣.٥٪ ذكور). كان أسلوب التعلم الأكثر شعبية الأسلوب التوافقي (٢٩.٢٪)، يليه الأسلوب الاستيعابي (٢٧.٩٪) والأسلوب التشعبي (٢٥.٦٪)، في حين أن الأسلوب التقاربي (١٧.٣٪) كان أسلوب التعلم الأقل تفضيلا. أظهرت درجات رضا الطلاب أنهم راضون بشكل عام، بدرجة متوسطة قيمتها ٦٤.٤٪. وُجد أن الذكور لديهم رضا أعلى في جميع المتغيرات مقارنة بالإناث. الاستنتاجات: لم تستطع هذه الدراسة العثور على أسلوب تعلم غالب أو اختلاف رضا عبر أساليب التعلم بين طلاب العلوم الصحية. وبالتالي، فإن البرامج التعليمية الحالية بجامعة الملك سعود بن عبد العزيز للعلوم الصحية تلبي أساليب تعلم الطلاب ورضاهم. يحتاج المعلمون إلى توسيع استراتيجياتهم لتشمل تعليمات لبناء بيئة تعليمية فعالة. Abstract: Objectives: Medical knowledge is constantly changing; this puts pressure on educators to adapt instructional strategies to their students' learning styles (LSs). Therefore, identifying the LSs of medical students could help teachers to develop teaching strategies to achieve better outcomes. The purpose of this study was to determine the LSs of health science university students, and to assess the relationship between LSs and student satisfaction with educational activities. Methods: This cross-sectional descriptive study was conducted in the Colleges of Medicine and Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences (KSAU-HS) Jeddah. We used Kolb's LS and a modified Student Satisfaction Survey from Mott Community College, Michigan. All participants received self-administered questionnaires; LS and demographic data were used as predictor variables. Students' satisfaction levels were considered the outcome variable. Results: A total of 359 students were recruited (mean age 19.0 ± 1.4 years; 53.5% males). The most popular LS was Accommodator (29.2%), followed by Assimilator (27.9%) and Diverger (25.6%), while the Converger style (17.3%) was the least preferred LS. The satisfaction scores of the students showed that they were generally satisfied with a mean score of 64.4%. Males were found to have higher satisfaction across all variables than females (p = 0.002). Conclusions: This study could not find a predominant LS or satisfaction difference across LSs among health science students. Thus, the current educational programmes in KSAU-HS meet students' LSs and satisfaction. Educators need to broaden their strategies for instruction, so as to build an effective learning environment. الكلمات المفتاحية: أساليب تعلم, رضا الطلاب, طلاب الطب, توافقي, استيعابي, Keywords: Accommodator, Assimilator, Learning styles, Medical students, Student satisfaction

Most of male breast masses are benign with gynecomastia being the most common entity encountered. Primary male breast cancer accounts for less than 1% of the total number of breast cancer. Male breast can be affected by a variety of conditions affecting the female breast with less frequency due to the lack of hormonal influence and consequent glandular sub-development. Imaging features of male breast masses are quite similar to the female breast. Therefore, using the knowledge of the female breast and applying it may help in the diagnosis and management of male breast abnormalities. In this article, we aim to review a variety of unusual male breast masses. We discuss the demographics of male breast tumors, describe the diagnostic algorithm for evaluating male breast masses, and review the imaging features of rare breast masses and mimickers of male breast cancer.

Interprofessional education (IPE) is now regarded as an extremely important approach in the academic field for preparing healthcare students to provide patient care in a collaborative team environment. In this study, we examine the perceptions and attitudes toward IPE in a Saudi specialized health sciences university. This study is a cross-sectional survey at King Saud bin Abdulaziz University for Health Sciences and King Abdulaziz Medical City in Jeddah, Saudi Arabia. The instruments used in this study were pre-designed self-administered questionnaires identified from the literature (The Nebraska Interprofessional Education Attitudes Scale (NIPEAS) and The Student Perceptions of Interprofessional Clinical Education-Revised (SPICE-R). A total of 668 individuals participated in the study. The majority of the participants were between the ages of 18 and 25 (79.2%) and were students (77.1%) from medicine, nursing and applied medical science. The participants' responses were primarily positive for all items of the NIPEAS and most of the items of the SPICE-R. The results of this study indicate that students and healthcare professionals have positive perceptions and readiness toward IPE, and implementation of shared learning is highly encouraged. The integration of IPE in the curriculum is recommended to improve teamwork and patient care outcomes.

Obtaining p-type wide-bandgap semiconductors with a bandgap >3.5 eV is still challenging. Here, p–n junction devices based on wide-bandgap (≥4 eV) p-type MnO quantum dots (QDs) and n-type Si-doped GaN are fabricated. The p-MnO QDs are synthesized by cost-effective femtosecond laser ablation in liquid. A simple spray-coating method is used for fabricating the p-MnO/n-GaN-based solar-blind deep UV (DUV) photodetector. X-ray diffraction, transmission electron microscopy, and Raman spectroscopy reveal the MnO QD crystal structure. X-ray photoelectron microscopy analysis reveals good band alignment between p-MnO QDs and n-GaN, demonstrating the (type-II) staggered band alignment p–n heterojunction-based device. Electrical and photocurrent measurements show a high photocurrent response with a low dark current, while superior photo-responsivity (∼2530 mA/W) is achieved, along with self-powered and visible-blind characteristics (265 nm cutoff), demonstrating a high-performance DUV device with high detection limit for low light level applications. This study provides insights into the potential of p-type MnO QDs for III-nitride p–n junction DUV devices.

Arms influence in myocardial perfusion single photon emission computed tomography (SPECT) imaging has been studied for the last two decades. These studies suggested that arms positioning next to the patient would not show cardiac abnormalities or perfusion defects in SPECT imaging while it would not affect the scan during positron emission tomography (PET) scans. As a recent improvement in Geant4 Application for Tomographic Emission (GATE), -a Monte Carlo simulation toolkit- a new feature was added to enable the use of STereoLithography (STL). STL files are implanted as an input geometry for most human organs, which would give superior advantages in details compared to analytical geometry shapes. This study is adopting this recent improvement in GATE to study arms effect in SPECT imaging with the consideration of four scenarios; normal heart perfusion imaging with and without arms positioned next to the patient and two of the same scenarios with a perfusion myocardial defected. The results showed that perfusion defect could be observed with arms next to the patient. For image reconstruction, both filtered backprojection (FBP) and iterative technique – maximum likelihood expectation maximization (MLEM) were used. The MLEM was performed to analyse the four different patient scenarios. The difference in counts between arms-up and arms-down position for the abnormal case was shown to be less than 6%. The conclusion from this paper is that arm influence during abnormal heart SPECT imaging can be measured and has a minimal contribution to the reconstructed images. Keywords: GATE, Reconstruction, SPECT, Arms, Heart, Myocardial, Perfusion, STL

We report on a study of our students’ understanding of gravity using the Newtonian Gravity Concept Inventory (NGCI). This article is supposed to serve two purposes: as a proof of applicability of the test to first year medical students outside the United States and as a general survey of our students’ understanding of gravity. The motivation for this work came initially from students’ misconceptions of gravity and related topics noticed in classrooms. NGCI has 26 multiple-choice questions probing students’ knowledge of gravity in four different domains: Directionality, Gravity as a force, Independence from other forces and threshold. Results confirmed weak overall performance of the 684 students participated in this study (average score of only 38.48%) with misconceptions related to gravity in all four domains. We were able to prove the applicability of the NGCI to our students through calculations of Classical Test Theory statistics and Cronbach’s alpha. We got a Cronbach’s alpha of 0.68, average difficulty index of 0.62 and average discriminatory index of 0.31 with three questions reported as too difficult based on the acceptable range. The test was given to students twice; before and after any gravity-related instructions in class (pre- and post-test). Post-test results will not be discussed here and left for future articles. In this article, we present the pre-test results and compare it to the original work by the authors of the test on astronomy and physics students.

Background. Around 75% of the world’s population relies on the use of complementary and alternative medicines (CAM) for their healthcare. Thus, we aimed at assessing the attitude and perception of health professional students about CAM and correlate the results with their demographical data. Methods. An observational cross-sectional study was conducted at King Saud bin Abdulaziz University for Health Sciences (KSAU-HS), Jeddah, Saudi Arabia, by enrolling 350 students. A self-administered questionnaire was used for data collection. Descriptive and inferential statistical analysis was performed using SPSS. Results. Results of our data suggested that majority of students were aware of the CAM modalities and considered prayers/spirituality (83.6%), massage (72.5%), nutritional supplements (74.1%), cupping (68.5%), herbal medicine (66.2), and yoga (61.6%) as most effective and least harmful CAM modalities. The students acquired more information about CAM from media (55%), books (56%), friends/relatives (59.7%), and other health professionals (58.4%), however, very little information from formal CAM courses or training (36.7%), which shows the lack of courses and trained health professional in the field of CAM. Despite utilizing nonreliable sources of CAM information, the majority of students had positive attitudes and perceptions about CAM usage. Majority of the students (75.8%) believe in the use of CAM for the mental and spiritual aspect of health and think that CAM providers give good information on maintaining a healthy lifestyle. The data also showed a significant P<0.05 association between awareness about CAM and gender. A significantly higher percentage of female students were using yoga and aromatherapy, while cupping was mostly used by male students. Similarly, a significant association was found among the different colleges and level of students in most of the CAM modalities. However, no association was found between the awareness and use of CAM with the educational level of parents or relatives in health sector except for acupuncture and cupping, where student’s awareness about acupuncture and cupping was found to have a significant positive association with mother educational level. On the other hand, a significant inverse association was found between acupuncture, yoga, cupping, and aromatherapy with family income. Conclusion. In conclusion, despite the lack of proper courses and professionally trained healthcare providers in the field of CAM, students demonstrated positive attitudes and beliefs toward the safety and effectiveness of CAM.

Langerhans cell histiocytosis (LCH) is a rare neoplasm that is caused by an uncontrolled proliferation of Langerhans cells. The clinical presentation of LCH is heterogeneous and can manifest as single or multiple osteolytic lesions, skin ulcerations, and involvement of single or multiple systems. Central nervous system (CNS) involvement is reported in 3.4-57% of patients with multisystem disease. In this article, we present the case of a young man with single system involvement (bone) of LCH who presented with seizures, headache, papilledema, and tinnitus. His magnetic resonance imaging (MRI) of the brain findings were reported as a normal study. The subtle signs of CNS involvement were missed by the radiologist. However, the high index of suspicion resulted in early diagnosis and treatment. The presence of empty sella turcica in neuroimaging could be the first sign of intracranial disease with chronic intracranial hypertension associated with LCH. This is especially correct if previous computed tomography (CT) scan of the brain was normal with normal appearance of the pituitary gland and the sella. Neuroimaging films should be reviewed by an expert neuroradiologist. In patients with new neurological symptoms who were diagnosed previously with LCH, intracranial disease has to be excluded. The workup in such case should include an MRI of the brain, CT of the brain and temporal bones, bone scan, cerebrospinal fluid analysis, ophthalmological assessment, and measurement of intracranial pressure. In patients with LCH who present with symptoms and signs of raised intracranial pressure, the term idiopathic intracranial hypertension should not be applied until an intracranial disease has been excluded totally. Keywords: Langerhans Cell Histiocytosis; Central Nervous System Involvement; Neuroimaging; Intracranial Hypertension.

High-energy radiation detectors such as X-ray detectors with low light photoresponse characteristics are used for several applications including, space, medical, and military devices. Here, an indirect bandgap inorganic perovskite-based X-ray detector is reported. The indirect bandgap nature of perovskite materials is revealed through optical characterizations, time-resolved photoluminescence (TRPL), and theoretical simulations, demonstrating that the differences in temperature-dependent carrier lifetime related to CsPbX3 (X = Br, I) perovskite composition are due to the changes in the bandgap structure. TRPL, theoretical analyses, and X-ray radiation measurements reveal that the high response of the UV/visible-blind yellow-phase CsPbI3 under high-energy X-ray exposure is attributed to the nature of the indirect bandgap structure of CsPbX3 . The yellow-phase CsPbI3 -based X-ray detector achieves a relatively high sensitivity of 83.6 μCGyair -1 cm-2 (under 1.7 mGyair s-1 at an electron field of 0.17 V μm-1 used for medical diagnostics) although the active layer is based solely on an ultrathin (≈6.6 μm) CsPbI3 nanocrystal film, exceeding the values obtained for commercial X-ray detectors, and further confirming good material quality. This CsPbX3 X-ray detector is sufficient for cost-effective device miniaturization based on a simple design.

Middle East Respiratory Syndrome Coronavirus (MERS-CoV) was first discovered in September 2012 in Saudi Arabia. Since then, it caused more than 1600 laboratory-confirmed cases and more than 580 deaths among them. The clinical course of the disease ranges from asymptomatic infection to severe lower respiratory tract illness with multiorgan involvement and death. The disease can cause pulmonary, renal, hematological, and gastrointestinal complications. In this paper, we report neurological complications of MERS-CoV in two adult patients, and we hypothesize the pathophysiology. The first patient had an intracerebral hemorrhage as a result of thrombocytopenia, disseminated intravascular coagulation, and platelet dysfunction. The second case was a case of critical illness polyneuropathy complicating a long ICU stay. In these cases, the neurological complications were secondary to systemic complications and long ICU stay. Autopsy studies are needed to further understand the pathological mechanism.