bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Analysis of Fatigue Life and strength of AA5052 Aluminum Alloy Reinforced with ZrO2, TiO2 and Al2O3 Nanoparticles
Authors: Ibraheem Baqir , F. Salman Salem , H. Ali Abduljabar 
Published: June 2022

In this study, the finite element method using ANSYS workbench 16.1 has been successfully used to predict the fatigue life, fatigue strength, and the factors of safety for the as cast AA5052 as arrow matrix and its composites: AA5052/7 wt% ZrO2, AA5052/7 wt% TiO2 and AA5052/7 wt% Al2O3. The Finite Element Analysis (FEA) model was building according to dimensions of the experimental fatigue specimen. The total number of elements was 504 elements with a total number of nodes of 2572 nodes. The numerical fatigue test was processed under static structural analysis, and it has been analyzed using fatigue tool on ANSYS, Goodman theory was used for the prediction of life. The FEM using ANSYS.16.1 workbench simulation showed a good agreement with the experimental results for all the stress life curves and the highest difference in fatigue life was 17% and the lowest was 1.4%, for ZrO2 composite, while the maximum overall average error was 2.031% for AA5052 and the lowest was 0.378%, for Al2O3 composite. The maximum difference about 4.14 % between the experimental and numerical fatigue strength at 107 cycles for the row matrix and less than for the composites, also the minimum factor of safety for the AA5052 alloy is 0.8327 and for AA5052/7 wt% ZrO2 composite is 1.0709 while for both AA5052/7wt%TiO2 and AA5052/7 wt% Al2O3 composites are 1.0707 at specific design life.
Clinician preferences for orthodontic bracket bonding materials: a quantitative analysis
Authors: Chee Sandra , Mangum Jonathan , Teeramongkolgul Teesit , Tan Stephanie , Schneider Paul 
Published: June 2022

Abstract

Background and objectives:
Many orthodontic bracket-bonding materials are available for clinical use. The current study aimed to assess the preferences and factors contributing to the clinical choice of bracket bonding material.

Methods:
Eight bracket bonding materials were trialled by 15 participants. The handling properties and overall ease of use of each material were scored by the participants on a Visual Analogue Scale (VAS). The participants also responded to a questionnaire regarding the use and perceptions of resin-modified glass ionomer cements (RMGICs) for bracket bonding. A quantitative analysis was conducted on the responses to the questionnaire.

Results:
Of all materials trialled, there was a consistent preference for the handling of resin composite (RC) materials. Fuji® II LC was the highest rated RMGIC material and was considered similar to RC materials for ease of handling.

Conclusions:
Fuji® II LC may be a suitable alternative to RC materials for orthodontic bracket bonding. Further research is required to assess and produce bonding materials possessing anti-cariogenic properties along with comparable handling properties to bracket bonding materials that are currently preferred.
Modeling of Material Characteristics of Conventional Synthetic Fabrics
Authors: Bydełek Arkadiusz , Berdychowski Maciej , Talaśka Krzysztof 
Published: June 2022

Abstract
This article presents a method for modeling the material characteristics of synthetic fabrics based on static tensile test results with consideration of material orthotropy. Material characteristics were determined for fabrics under load at three different angles in relation to their orthotropy. The fabrics examined were the following: polyester fabrics Bratex and Ortalion, cotton fabric with nylon and elastin fabric (poplin), and Gore-Tex membrane fabric. Considering the material mechanical characteristics, the differences were in grammage, maximum strain, and tensile strength. The study allowed us to determine the nonlinear elastic dependency between strain and stress. Test results were implemented within the Abaqus/Explicit framework for the purpose of performance of verification simulations. The correlation between simulated and experimental results was established. A high degree of similarity allows us to classify the obtained material model as usable in simulation work.
Zn2+ induces changes in activities of mitochondrial respiratory chain complexes and emissions of floral volatiles in Dendrobium huoshanense
Authors: Zhu Wangsheng , Dai Jun , Wang Jiahong 
Published: June 2022

Abstract
In recent years, there has been increasing interest in floral volatiles due to their important function in reproduction, self-protection and so on. Although some progress was made on deciphering emissions of floral volatiles and on related mechanisms under a variety of environmental factors, the effects of Zn2+ concentrations on mitochondrial function and floral volatile emissions are yet to be revealed. Dendrobium huoshanense petals were used as materials and were treated with a 0–8 mM ZnSO4 solution. Intracellular Zn2+ concentrations were evaluated by the fluorescent dye method and atomic absorption method. Mitochondrial respiratory chain complex activities and the precursor and ATP contents were determined by the biochemical method. Floral volatile components were analyzed by the gas chromatograph-mass spectrometer (GC-MS). The results indicated that ZnSO4 application significantly increased intracellular Zn2+ concentrations. Elevated intracellular Zn2+ concentrations differently affected mitochondrial respiratory chain complex activities, precursor and adenosine triphosphate (ATP) productions and floral volatile emissions. Moreover, positive correlations exist among the activities of mitochondrial respiratory chain complexes, productions of precursors and ATP and emissions of floral volatiles. It is concluded that Zn2+ concentrations induce the activity changes of mitochondrial respiratory chain complexes, especially complex II and V, which promote or inhibit the emissions of floral volatiles by affecting the precursor and ATP levels that are closely related to the production of terpenoids, benzoids and fatty acid derivatives. The research will contribute to understanding the relationship between Zn2+ concentrations and floral volatile emissions from the perspective of mitochondrial function.
Komunikasi Digital di Media Sosial dan E-Commerce dalam Menentukan Keputusan Pembelian Produk Lilin Aromaterapi
Authors: Pandi Janessa , Oktavianti Roswita 
Published: June 2022

Digital communication in social media and e-commerce can influence and determine purchasing decisions for a product. Digital communication on social media and e-commerce also makes it easier for people to shop. This research raises about how digital communication in social media and e-commerce in purchasing decisions of aromatherapy candle products. The method used in this paper is a qualitative research method. Collecting data by interviewing resource persons and non-participant observation. Then for the theory used in this study is the theory of Attention, Interest, Desire, Action (AIDA) and the concept of purchasing decisions. Based on the results of this study, it is known that digital communication on social media in determining purchasing decisions does not always go well, there are obstacles that occur in communicating on social media. Communication can only be done through chat, not face-to-face, requiring a strong and good signal or internet connection. There are several factors that determine purchasing decisions for a product, including good communication between sellers and buyers, speed in responding to messages or buyer questions. The trust given by online sellers is also one of the important factors in determining the purchase decision of a product. Komunikasi digital di dalam media sosial maupun e-commerce dapat mempengaruhi dan menentukan keputusan pembelian suatu produk. Komunikasi digital di media sosial dan e-commerce juga memudahkan masyarakat untuk berbelanja. Penelitian ini mengangkat tentang bagaimana komunikasi digital di media sosial dan e-commerce dalam keputusan pembelian produk lilin aromaterapi. Metode yang digunakan dalam penelitian ini adalah metode penelitian kualitatif. Pengumpulan data dengan cara wawancara narasumber dan observasi non partisipan. Kemudian untuk teori yang digunakan dalam penelitian ini adalah teori Attention, Interest, Desire, Action (AIDA) dan konsep keputusan pembelian. Berdasarkan hasil dari penelitian ini, diketahui bahwa komunikasi digital di media sosial dalam menentukan keputusan pembelian tidak selalu berjalan dengan baik, terdapat hambatan-hambatan yang terjadi dalam berkomunikasi di media sosial. Komunikasi yang dilakukan hanya dapat melalui chatting, tidak melalui tatap muka, membutuhkan sinyal atau koneksi internet yang kuat dan baik. Terdapat beberapa faktor yang menentukan keputusan pembelian suatu produk, diantaranya adalah komunikasi yang baik antar penjual dan pembeli, kecepatan dalam merespon pesan atau pun pertanyaan pembeli. Kepercayaan yang diberikan oleh penjual online juga salah satu faktor yang penting dalam menentukan keputusan pembelian suatu produk.
All MCIDs Are Wrong, But Some May be Useful
Authors: Boyer Christopher W. , Lee Ian E. , Tenan Matthew S. 
Published: June 2022

Objective To demonstrate how to apply a baseline-adjusted receiver operator characteristic curve (AROC) analysis for minimum clinically important differences (MCIDs) in an empirical data set and discuss new insights relating to MCIDs. Design Retrospective study. Methods This study includes data from 999 active-duty military service patients enrolled in the United States Military Health System's Military Orthopedics Tracking Injuries and Outcomes Network. Anchored MCIDs were calculated using the standard receiver operator characteristic analysis and the AROC analysis for the Patient-Reported Outcome Measure Information System (PROMIS) Pain Interference and Defense and Veterans Pain Rating Scale (DVPRS). Point estimates where confidence intervals (CIs) crossed the 0.5 identity line on the area-under-the-curve (AUC) analysis were considered statistically invalid. MCID estimates where CIs crossed 0 were considered theoretically invalid. Results In applying an AROC analysis, the region of AUC and MCID validity for the PROMIS Pain Interference score exists when the baseline score is greater than 61.0 but less than 72.3. For DVPRS, the region of MCID validity is when the baseline score is greater than 5.9 but less than 7.9. Conclusion Baseline values influence not only the MCID but also the accuracy of the MCID. MCIDs are statistically and theoretically valid for only a discrete range of baseline scores. Our findings suggest that the MCID may be too flawed a construct to accurately benchmark treatment outcomes. J Orthop Sports Phys Ther 2022;52(6):401–407. doi:10.2519/jospt.2022.11193
دور إدارة المعرفة في تحقيق البراعة التنظيمية - دراسة ميدانية على الإدارة العامة للتعليم بمحافظة جدة –
Authors: المحمادي أمجاد رجا الله , القرشي سوزان محمد 
Published: June 2022

هدفت هذه الدراسة إلى معرفة دور إدارة المعرفة بأبعادها (توليد المعرفة، تخزين المعرفة، توزيع المعرفة، تطبيق المعرفة) في تحقيق البراعة التنظيمية ببعديها (الاستغلال، الاستكشاف) بالإدارة العامة للتعليم بمحافظ جدة، وتمثلت مشكلة الدراسة في السؤال: ما دور إدارة المعرفة في تحقيق البراعة التنظيمية في الإدارة العامة للتعليم بمحافظة جدة؟ وللدراسة أهمية نظرية حيث تساهم في إثراء المعرفة من خلال تحديد العلاقة بين إدارة المعرفة والبراعة التنظيمية وتتمثل أهميتها التطبيقية في مساهمة نتائجها وتوصياتها في الارتقاء بالإدارة وجعلها بارعة من خلال الاهتمام بإدارة المعرفة وتوظيفها بالشكل الأمثل، ووضعت الفرضيات اعتمادًا على دراسة أثر أبعاد إدارة المعرفة في تحقيق البراعة التنظيمية عند مستوى دلالة إحصائية (0.05≥α)، وإيجاد ال فروق ذات دلالة إحصائية بين استجابات أفراد العينة حول تطبيق إدارة المعرفة والبراعة التنظيمية تُعزى لمتغيراتهم الشخصية والوظيفية، وقد تم اعتماد المنهج الوصفي التحليلي لتحقيق أهداف هذه الدراسة، واستخدام الاستبانة والمقابلات معًا كأدوات لجمع البيانات، وتكون مجتمع الدراسة من جميع موظفي الإدارات والبالغ عددهم بـ (1114) وتم أخذ عينة عشوائية بسيطة بلغ عددها (286) موظفًا وموظفة، وأُجريت المقابلات مع (29) من موظفي الإدارة، وبعد معالجة البيانات احصائيًا توصلت الدراسة إلى عدة نتائج، من أهمها: وجود أثر ذو دلالة إحصائية عند مستوى (0.05≥α) لأبعاد إدارة المعرفة(توليد المعرفة، تخزين المعرفة، تطبيق المعرفة) في تحقيق البراعة التنظيمية في الإدارة العامة للتعليم بمحافظة جدة، وقدمت الدراسة عدة توصيات، أهمها: تعزيز الممارسات المساهمة في توليد المعرفة واكتسابها، إنشاء وحدات تنظيمية خاصة بأنشطة الاستغلال والاستكشاف مع تحديد طرق العمل وممارساتها الإدارية وتدريب شاغليها وصقل مهاراتهم.
Optimizing Project Management using Artificial Intelligence
Authors: Prifti Valma 
Published: June 2022

Abstract
This study focuses on identifying the weakest points of project management and the possibility of where artificial intelligence can help precisely in their optimization. The results were taken from a survey where project managers of various categories were asked about the main challenges facing management today and the points where artificial intelligence can be seen as a optimization tool. In this decade, artificial intelligence (AI) has undoubtedly been one of the most influential technologies. AI has changed the way people live and work, and project management is no exception. There is always controversy about the use of AI technology. In this paper first is explained the need for companies to use AI technology and after considering the advantages and risks of AI. Also using project management based on machine learning is the optimal option. Some proposals for the implementation of AI in project management are presented. The study describes how AI systems can support project managers to become more efficient in their work.
Managing Workplace Anxiety during the Pandemic: A Pilot Study of Natural Imagery through 4K Video and Virtual Reality
Authors: Pillay Srini , Candela Patrick , Christensen Erik 
Published: June 2022

Abstract

Background: Workplace anxiety has become an increasing priority to address. To date, professional interventions that address workplace anxiety involve medications or talk-therapy, yet the response to these modalities is limited or partial. As a result, there is room for other modalities of care.

Aim: In this pilot study, we examined whether imagery of nature delivered through 4K Video or virtual reality (VR) headsets could be safe and feasible when administered in a workplace setting. We also examined whether they could reduce anxiety and worry.

Methods: Sixteen employees at a large health insurance company were recruited to participate in the study. All participants completed “pre” and “post” surveys that measured worry or state-anxiety before and after viewing the video or VR interventions respectively. They were instructed to use the interventions at least once a day, three times a week over a two-week period.

Results: Overall, the Reulay nature-based interventions were safe and feasible. In addition, there were strong signals of efficacy in reducing anxiety and worry for the 4K Video and virtual reality interventions. In certain instances, VR was superior to the 4K Video.

Conclusion: Nature-based imagery may be a useful intervention to reduce anxiety in the workplace if it is delivered using 4K video or VR headsets. Further studies in larger samples are needed to confirm these findings.
Fragility of Built Urban Objects to Vicious Attacks: Assessment by Means of Limited Data on Abnormal Violent Actions
Authors: Vaidogas Egidijus Rytas 
Published: June 2022

Abstract
An assessment of fragility of objects built (constructed) in urban environment to deliberately imposed abnormal actions (loads) is considered. The actions under analysis are explosions, vehicular impacts and fires that can be imposed by acts of terrorism and sabotage as well as such highly random events as car crashes into structures due to unintentional roadway departures. The fragility is assessed by means of mathematical models known as fragility functions and developed for vulnerable building and transportation structures, protective barriers, and energy supply facilities. The result of fragility assessment is the probability of the damage that can be foreseen and modelled by means of mathematical models used for structural analysis. The case is studied where information on an abnormal action can be expressed in the form of a small-size statistical sample with components acquired in post-mortem investigations of attacks or unintentional accidents. The basic idea is an application of the statistical (bootstrap) resampling for the estimation the damage probability. The resampling procedure is applied to values of the fragility function that can be developed for the damage caused by the abnormal action in question. The values of the fragility function are estimated for components of the small-size sample of abnormal action values. The resampling of the fragility function values yields a conservative estimate of the damage probability expressed by the limit of a one-sided confidence interval. The estimate of the damage probability can be applied to making decisions concerning the level of resilience of vulnerable urban objects.
Single Leg Bridge Test is Not a Valid Clinical Tool to Assess Maximum Hamstring Strength
Authors: Gasparin Gabriela Bissani , Ribeiro-Alvares João Breno Araujo , Baroni Bruno Manfredini 
Published: June 2022

Background The single leg bridge test (SLBT) has been introduced in the sports context as a way of estimating hamstring muscle capacity for prevention and rehabilitation of hamstring strain injuries. Purpose The primary aim was to examine the association between SLBT scores with concentric and eccentric knee flexor peak torques. Secondarily, this study aimed examine the association of between-limb asymmetries provided by SLBT and isokinetic tests. Study design Cross-sectional study. Methods One hundred male soccer players (20±3 years) performed the SLBT and the knee flexion-extension isokinetic dynamometry evaluation (60°/s) billaterally during a single visit. SLBT score (i.e., number of repetitions until failure) and concentric and eccentric knee flexor peak torques (normalized per body mass) were considered for analysis. For both SLBT and isokinetic dynamometry, between-limb asymmetry was calculated as the percentage difference between the left limb and the right limb. Associations were assessed through Pearson’s correlation coefficient. Results The mean SLBT score was 33.6±9.6 repetitions, concentric peak torque was 2.00±0.22 Nm/kg, and eccentric peak torque was 2.79±0.44 Nm/kg. Between-limb asymmetry was 0.4±9.6%, 1.08±8.5%, and 1.64±14.61% in SLBT, concentric, and eccentric tests, respectively. There was a poor association of SLBT score with concentric (p<0.001, r=0.275) and eccentric (p=0.002, r=0.215) peak torques. The SLBT between-limb asymmetry was poorly associated with asymmetry found in concentric peak torque asymmetry (p=0.033, r=0.213) and was not associated with eccentric peak torque asymmetry (p=0.539, r=0.062). Conclusion The SLBT should not be used as a clinical tool to assess the maximum strength of hamstring muscles. Level of Evidence Level 3
Hip Adduction and Abduction Strength Profiles Among Bantam, High School, Juniors, and Collegiate American Ice Hockey Players
Authors: Olson Morgan L. , Schindler Gary 
Published: June 2022

Background Adductor strains are the most common non-contact musculoskeletal injury sustained in ice hockey. Systematic reviews have determined higher level of play and lower hip adduction to abduction strength ratios to be associated with an increased risk of adductor strain across multiple sports. Limited research exists regarding hip adduction and abduction strength profiles across various levels of ice hockey players. Purpose To compare isometric hip adduction and abduction strength profiles among bantam, high school, tier one juniors, and NCAA Division I collegiate ice hockey players. A secondary purpose was to identify whether differences in strength profiles between dominant and non-dominant limbs exist. Study Design Cross-sectional cohort study. Methods A questionnaire of demographic data, hockey, and injury specific information was completed by all subjects. The mean of three reps of maximal hip isometric adduction and abduction strengths were quantified using a handheld dynamometer with external belt-fixation. Ratios of hip adduction-to-abduction strength were calculated and normalized for body weight. Results A total of 87 uninjured skaters were included in this study with a mean age of 17 years. Mean hip adductor-to-abductor ratios for Bantam hockey players were 121% followed by collegiate (115%), Juniors (111%), and high school (109%) hockey players. No statistically significant differences were found between peak hip adduction and abduction isometric strength and playing level. In addition, there was no difference between unilateral hip strength ratios and shooting hand or leg dominance. While 34.5% of subjects reported a history of adductor injury, no significant differences existed regarding strength ratios during bilateral comparison or when compared to their team norms. Three subjects were found to have unilateral ratios of less than 80%, while two subjects demonstrated bilateral ratios of less than 80%. Conclusions Symmetry is illustrated between dominant and non-dominant legs in ice hockey players with and without a history of adductor injury. Results align well with previously established cross-sectional data from Australian football, with ratios of 103% in high school players, 107% in semi-professional players, and 113% in collegiate players. Level of Evidence Level 3
Can the Scapular Dyskinesis Test be Associated with Throwing Related Injuries During the Course of Collegiate Baseball Seasons?
Authors: Tsuruike Masaaki , Mukaihara Yohei , Ellenbecker Todd S. 
Published: June 2022

Background A pattern of scapular dyskinesis on the dominant side has been demonstrated to be associated with a decrease in throwing arm conditions identified by a self-report outcome assessment in collegiate baseball pitchers during the course of a single season. However, it is unclear if symptomatic shoulders in baseball pitchers may be associated with the presence of scapular dyskinesis. Purpose To study the relationship between the presence of scapular dyskinesis and throwing-related injury in collegiate baseball pitchers during each respective course of up to four subsequent seasons. Methods A single Division 1 National Collegiate Athletic Association team participated in this study over a four-year-period. The scapular dyskinesis test was implemented during the preseason for baseball pitchers. Players were followed throughout each respective season to track the incidence of throwing-related upper extremity injuries. Results A total of 36 collegiate baseball pitchers (height: 185.3 ± 5.6 cm, weight: 88.8 ± 7.8 kg, age: 20.0 ± 1.5 years) consisting of 57 pitcher seasons were followed in this study, in which 18 pitchers remained with the team for more than one year. Twenty-seven of the 57 pitchers were classified as having scapular dyskinesis demonstrated at around 90° of shoulder flexion on the throwing side. Five injuries (13.2% of a total of 38 injuries) were diagnosed as throwing-related shoulder injuries during the course of the intercollegiate baseball seasons. Four of the five throwing-related shoulder injuries occurred in pitchers who had scapular dyskinesis on their dominant side. Consequently, the odds ratio was 5.04 for the collegiate pitchers with scapular dyskinesis on the throwing arm side associated with a throwing-related shoulder injury compared to those with no scapular dyskinesis (p = 0.16). No relationship was identified between scapular dyskinesis on the throwing arm side and throwing-related elbow injury. Eighty-one percent of the scapular dyskinesis test results were not changed on the throwing side from the previous to the following year for those 18 pitchers who were followed for more than one season, whereas 42.9% of the results remained unchanged on the non-throwing side. Conclusion The results suggest that collegiate baseball pitchers with dominant arm scapular dyskinesis likely are at increased risk of throwing-related shoulder injury. Level of evidence Level 2, Prospective Cohort Study