bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hubungan antara Konflik Kerja-Keluarga dan Niat Berhenti Kerja
Authors: Zainourudin Jamilla Syaza , Norazman Irmawati , Omar Rozeyta , Shaari Roziana 
Published: September 2021

Work-family conflict is the topic gaining popularity among social science researchers. The purpose of this study is to examine the relationship between work-family conflict and turnover intention among operational staff at a hotel in Kuala Lumpur. This study is also aimed to identify the level of both variables. 64 respondents participated in the study. Data was gathered through Work-Family Conflict Scale and Roodt’s Turnover Intentions Questionnaire and was analyzed by using descriptive statistics through mean score, frequency and percentage, and inferential statistics through Pearson Correlation. The findings revealed the level of work-family conflict is moderate while turnover intention is high. Moreover, work-family conflict has a moderate positive correlation with turnover intention. Lastly, recommendations are suggested for the organization and future research. One of the suggestions provided to the organization is to incorporate family-supportive behavior among hotel supervisors, while for future studies, researcher recommend to broaden the scope of the study.
Hubungan antara Libatsama Pekerja dan Tingkah Laku Inovasi Pekerja di Organisasi Xyz
Authors: Ismail Muhamad Faiz , Hassan Mohamed Ayyub , Yaacob Hashim Fauzy , Sarip Azlineer 
Published: September 2021

This research is aimed to study the relationship between employee engagement and employee innovation behavior at XYZ Organization. A total of 62 employees at the XYZ Organization from various departments namely administration, information technology, out-reach, in-reach and exhibition were selected as respondents. The data in this research were collected through questionnaires containing information on respondent demographic, employee engagement and employee innovation behavior. After that, the data were analyzed using the Statistical Package for Social Sciences (SPSS). The analysis of results shows that the level of employee engagement and innovation behavior is high, while the relationship between employee engagement and employee innovation behavior at XYZ Organization is positive and strong. In addition, there are several recommendations that were provided to researchers for future research.
The Effect of Affiliate Needs Towards Cybersex on Male Adolescent Users of Online Dating Application
Authors: Kesumawardhany Maharany Adhytya , Nugroho Naufal Alifian , Dwiyanti Retno 
Published: September 2021

When it blooms once the use of applications dating online, who used male adolescents to mutually acquainted and interact with your opponent types, online dating application users initially only craved having a relationship with someone else, however, the passage of time of application of dating online is not only used as a place to get acquainted but to do cybersex. The research is aimed to know how to influence the needs of affiliates against cybersex on a male adolescent who used the application of dating online. Subject research, as much as 42 male adolescents who used the form of dating online, aged 18-40 years old, method of analysis is using methods quantitative. Collecting the data in the study is using a scale Likert, namely the scale of the needs of affiliates, with the reliability of 0.902 and scale cybersex with a coefficient of reliability of 0. 816. Analysis of the data used is a test of linear regression simple, earned value F of 0.403 and Sig = 0,000 (P> 0.001), it can be concluded that the need for affiliation has no effect on cybersex. The coefficient of determination (R Square) of 0. 042, which has a meaning that influences the need of affiliates against cybersex, amounted to 4.2 %.
Exploring the Personal Factors of Homeless Ex-Prisoners Who Migrated Repeatedly to Kuala Lumpur from the Perspective of Migration Theory by Everett S. Lee/ Meneroka Faktor Peribadi Gelandangan Bekas Banduan Berhijrah Secara Berulang Kali ke Kuala Lumpur dari Perspektif Teori Migrasi oleh Everett S. Lee
Authors: Jasni Mohd Alif , Omar Noralina , Abu Bakar Siti Hajar , Che Mohd Nasir Norruzeyati 
Published: September 2021

The concentration of homeless ex-prisoners in the capital city raises personal choice factors for them to migrate repeatedly. Kuala Lumpur is the chosen destination for migration for ex-prisoners after their release from prison. The lack of place to go makes Kuala Lumpur a destination of choice despite living as a homeless person. This qualitative study uses a phenomenological approach involving 15 homeless ex-prisoners to explore the personal factors that led them to choose Kuala Lumpur and resigned to living on the streets. The personal factors identified were self-choice, finding job, having friends, easy access to food, migrating, and being familiar with Kuala Lumpur. The study's findings have confirmed the migration factors brought about by the Migration Theory by Everett S. Lee. This study recommends that the social services and welfare agencies involved, such as the Social Welfare Department, Kuala Lumpur City Hall, and the Prisons Department, to implement more comprehensive and consistent interventions towards assisting homeless ex-prisoners via necessary services, welfare, and appropriate social support.
Vibration Characteristics of Island-Bridge Structure on Porous PDMS Substrates for Stretchable Electronics
Authors: Song Xin , Bian Zuguang , Zhou Xiaoliang , Huang Zhuye 
Published: September 2021

Abstract
Stretchable electronics employing island-bridge structure design can achieve controllable and reversible stretchability. The use of a porous substrate, which provides excellent breathability for wearable devices bonded to skin, not only satisfies this static superiority but also has a profound impact on the dynamic performance of the stretchable electronics. In this paper, the vibration characteristics of the island-bridge structure based on porous polydimethylsiloxane (p-PDMS) substrates are studied by utilizing an analytical model, which takes account of geometric nonlinearity due to mid-plane stretching, buckling configuration, elastic boundary conditions considering the p-PDMS substrates and the mass of the island. In numerical examples, the accuracy of the analytical model is first verified by finite element analysis (FEA). After that, we investigate the effects of some primary factors, i.e., the prestrain of the substrate, spring stiffnesses at the ends of the interconnect, porosity and thickness of the substrate, and the mass of the island, on the natural frequencies and vibration mode shapes of the island-bridge structure. Results show that the vibration characteristics of the island-bridge structure can be tuned conveniently by adjusting the porosity of the substrate and the mass of the island, which are expected to be helpful to mechanical design and optimization of stretchable electronics in complex noise environments.
Evidence-Theory-Based Reliability Analysis Through Kriging Surrogate Model
Authors: Zhang Dequan , Liang Yunfei , Cao Lixiong , Liu Jie , Han Xu 
Published: September 2021

Abstract
It is generally understood that intractable computational intensity stemming from repeatedly calling performance function when evaluating the contribution of joint focal elements hinders the application of evidence theory in practical engineering. In order to promote the practicability of evidence theory for the reliability evaluation of engineering structures, an efficient reliability analysis method based on the active learning Kriging model is proposed in this study. To start with, a basic variable is selected according to basic probability assignment (BPA) of evidence variables to divide the evidence space into sub-evidence spaces. Intersection points between the performance function and the sub-evidence spaces are then determined by solving the univariate root-finding problem. Sample points are randomly identified to enhance the accuracy of the subsequently established surrogate model. Initial Kriging model with high approximation accuracy is subsequently established through these intersection points and additional sample points generated by Latin hypercube sampling. An active learning function is employed to sequentially refine the Kriging model with minimal sample points. As a result, belief (Bel) measure and plausibility (Pl) measure are derived efficiently via the surrogate model in the evidence-theory-based reliability analysis. The currently proposed analysis method is exemplified with three numerical examples to demonstrate the efficiency and is applied to reliability analysis of positioning accuracy for an industrial robot.
Heat Transfer in a Rotating, Blade-Shaped, Two-Pass Cooling Channel With a Variable Aspect Ratio
Authors: Chen I-Lun , Sahin Izzet , Wright Lesley M. , Han Je-Chin , Krewinkel Robert 
Published: September 2021

AbstractThis study features a rotating, blade-shaped, two-pass cooling channel with a variable aspect ratio (AR). Internal cooling passages of modern gas turbine blades closely follow the shape and contour of the airfoils. Therefore, the cross section and the orientation with respect to rotation varies for each cooling channel. The effect of passage orientation on the heat transfer and pressure loss is investigated by comparing to a planar channel design with a similar geometry. Following the blade cross section, the first pass of the serpentine channel is angled at 50 deg from the direction of rotation while the second pass has an orientation angle of 105 deg. The coolant flows radially outward in the first passage with an AR = 4:1. After a 180-deg tip turn, the coolant travels radially inward into the second passage with AR = 2:1. The copper plate method is applied to obtain the regionally averaged heat transfer coefficients on all the interior walls of the cooling channel. In addition to the smooth surface case, 45 deg angled ribs with a profiled cross section are also placed on the leading and trailing surfaces in both the passages. The ribs are placed such that P/e = 10 and e/H = 0.16. The Reynolds number varies from 10,000 to 45,000 in the first passage and 16,000 to 73,000 in the second passage. The rotational speed ranges from 0 to 400 rpm, which corresponds to maximum rotation numbers of 0.38 and 0.15 in the first and second passes, respectively. The blade-shaped feature affects the heat transfer and pressure loss in the cooling channels. In the second passage, the heat transfer on the outer wall and trailing surface is higher than the inner wall and leading surface due to flow impingement and the swirling motion induced by the blade-shaped tip turn. The rotational effect on the heat transfer and pressure loss is lower in the blade-shaped design than the planar design due to the feature of angled rotation. The tip wall heat transfer is significantly enhanced by rotation in this study. The overall heat transfer and pressure loss in this study is higher than the planar geometry due to the blade-shaped feature. The heat transfer and pressure loss characteristics from this study provide important information for the gas turbine blade internal cooling designs.
Design of Torque-Compensated Mechanical Systems With Two Connected Identical Slider-Crank Mechanisms
Authors: Arakelian Vigen 
Published: September 2021

AbstractBalancing the torque of mechanisms designed to minimize the fluctuation of input shaft torque is an effective means of improving their dynamic performance. There are several ways of solving the problem: optimizing the distribution of the moving mass of the original mechanism; cam sub-systems that displace the balancing mass; cam-spring mechanisms; flywheels driven by noncircular gears; adding articulated dyads, linkages or redundant drivers. This paper addresses the problem of input torque compensation with the optimal connection of two identical slider-crank mechanisms. The acceleration and deceleration phases of the links of the slide-crank mechanism obviously change periodically, causing torque to fluctuate at the input shaft. The problem is how to connect two mechanisms in order to reduce the input torque. This is done by minimizing the root-mean-square value of the input torque of the combined linkages. Two schemes are considered: slider-crank mechanisms with sliders moving on the same side, and on opposite sides. The prime value of this study is that it proposes an analytically tractable solution for identifying the general dynamic properties of mechanisms. Based on the ratio of link lengths, the precise relations for optimal connection of identical slider-crank mechanisms, i.e., a connection that produces the minimum root-mean-square values of the input torque, are developed. The numerical simulations illustrate the efficiency of the suggested approach. Observations show that the best solutions from the point of view of input torque minimization are obtained for the value of the coupling angle of two mechanisms around 90 deg.
Exact Path Synthesis of RCCC Linkages for a Maximum of Nine Prescribed Positions
Authors: Bai Shaoping , Li Zhongyi , Angeles Jorge 
Published: September 2021

Abstract
This article addresses the path synthesis of RCCC (revolute-cylindrical-cylindrical-cylindrical) linkages, a problem that has not received due attention in the literature. Compared with planar and spherical four-bar linkages, a RCCC linkage has many more design parameters, which lead to a complex formulation of the path synthesis problem and, consequently, to a quite challenging system of algebraic equations. In this article, the problem is solved with a novel formulation of path synthesis for visiting a number of prescribed positions. This is achieved by means of an alternative coordinate system, which allows point coordinates to be expressed with the aid of two vectors fixed to the same body. By this means, the rotation matrix used to represent the coupler link attitude is obviated. The synthesis equations are then formulated in a simple form. Our formulation confirms that path synthesis admits exact solutions for up to nine prescribed positions, which proves a landmark claim submitted by Burmester. Examples are included to demonstrate the path synthesis procedure with the method thus developed.
Impact of Ceramic Matrix Composite Topology on Friction Factor and Heat Transfer
Authors: Cory Trevor M. , Edelson Ryan D. , Thole Karen A. , Vincent Tyler , Quach San , Mongillo Dominic 
Published: September 2021

AbstractCeramic matrix composites (CMCs) are of interest for hot section components of gas turbine engines due to their low weight and favorable thermal properties. To implement this advanced composite in a gas turbine engine, characterizing the influence of CMC’s surface topology on heat transfer and cooling performance is critical. However, very few published studies have reported the flow and heat transfer effects caused by this unique surface topology. This study is an experimental and computational investigation to evaluate the effect of weave orientations, relevant to CMC surfaces, on the resulting pressure loss and convective heat transfer within an internal channel. The weave pattern was additively manufactured as the walls of a scaled-up coupon containing a single channel. For each of the three weave orientations, bulk pressure losses and convective heat transfer coefficients were measured over a range of Reynolds numbers. Scaling the pressure losses in terms of a friction factor and convective heat transfer coefficients in terms of a Nusselt number showed the importance of choosing the appropriate definition of the hydraulic diameter, which was particularly important for the friction factor. A coupon having one wall with the weave surface increased pressure loss and heat transfer compared to a smooth wall with the largest increases occurring when the CMC weave strands were perpendicular to the flow. Friction factor augmentations were much higher than heat transfer augmentations. When adding the weave to a second channel wall, pressure loss and heat transfer were further increased. Orienting the CMC strands perpendicular to the flow consistently showed the largest augmentations in heat transfer over a smooth channel, but at a much higher pressure loss penalty than that seen with the CMC strands parallel to the flow.
Mitigating barriers to addiction recovery in Aotearoa New Zealand: A lived experience perspective
Authors: Jowett Rachel Victoria , Dale Michael , Cooper Lareen 
Published: September 2021

INTRODUCTION: The New Zealand government’s health surveys consistently identify that alcohol and other drug (AOD) addiction is an issue for New Zealanders. However, there is a lack of qualitative research on the lived experiences of health and social service professionals who have previous or current experience of AOD addiction in Aotearoa New Zealand.METHODS: A constructivist approach was utilised, semi-structured interviews were conducted, and subsequent thematic analysis identified themes highlighting what contributed, and created barriers to, participants’ successful AOD addiction recovery.FINDINGS: Identification of nine themes illustrated that the barriers to AOD addiction recovery in Aotearoa New Zealand experienced by the research participants were systemic and preventable.CONCLUSIONS: The recommendation of this research is that the lived experience of people who have experienced AOD addiction in Aotearoa New Zealand is better utilised in order to mitigate, and enhance, identified barriers, and contributors to, successful AOD addiction recovery.
Use of artificial intelligence for image analysis in breast cancer screening programmes: systematic review of test accuracy
Authors: Freeman Karoline , Geppert Julia , Stinton Chris , Todkill Daniel , Johnson Samantha , Clarke Aileen , Taylor-Phillips Sian 
Published: September 2021

Abstract

Objective
To examine the accuracy of artificial intelligence (AI) for the detection of breast cancer in mammography screening practice.

Design
Systematic review of test accuracy studies.

Data sources
Medline, Embase, Web of Science, and Cochrane Database of Systematic Reviews from 1 January 2010 to 17 May 2021.

Eligibility criteria
Studies reporting test accuracy of AI algorithms, alone or in combination with radiologists, to detect cancer in women’s digital mammograms in screening practice, or in test sets. Reference standard was biopsy with histology or follow-up (for screen negative women). Outcomes included test accuracy and cancer type detected.

Study selection and synthesis
Two reviewers independently assessed articles for inclusion and assessed the methodological quality of included studies using the QUality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool. A single reviewer extracted data, which were checked by a second reviewer. Narrative data synthesis was performed.

Results
Twelve studies totalling 131 822 screened women were included. No prospective studies measuring test accuracy of AI in screening practice were found. Studies were of poor methodological quality. Three retrospective studies compared AI systems with the clinical decisions of the original radiologist, including 79 910 women, of whom 1878 had screen detected cancer or interval cancer within 12 months of screening. Thirty four (94%) of 36 AI systems evaluated in these studies were less accurate than a single radiologist, and all were less accurate than consensus of two or more radiologists. Five smaller studies (1086 women, 520 cancers) at high risk of bias and low generalisability to the clinical context reported that all five evaluated AI systems (as standalone to replace radiologist or as a reader aid) were more accurate than a single radiologist reading a test set in the laboratory. In three studies, AI used for triage screened out 53%, 45%, and 50% of women at low risk but also 10%, 4%, and 0% of cancers detected by radiologists.

Conclusions
Current evidence for AI does not yet allow judgement of its accuracy in breast cancer screening programmes, and it is unclear where on the clinical pathway AI might be of most benefit. AI systems are not sufficiently specific to replace radiologist double reading in screening programmes. Promising results in smaller studies are not replicated in larger studies. Prospective studies are required to measure the effect of AI in clinical practice. Such studies will require clear stopping rules to ensure that AI does not reduce programme specificity.

Study registration
Protocol registered as PROSPERO CRD42020213590.
Paediatric surgical outcomes in sub-Saharan Africa: a multicentre, international, prospective cohort study
Authors:   PaedSurg Africa Research Collaboration
Published: September 2021

IntroductionAs childhood mortality from infectious diseases falls across sub-Saharan Africa (SSA), the burden of disease attributed to surgical conditions is increasing. However, limited data exist on paediatric surgical outcomes in SSA. We compared the outcomes of five common paediatric surgical conditions in SSA with published benchmark data from high-income countries (HICs).MethodsA multicentre, international, prospective cohort study was undertaken in hospitals providing paediatric surgical care across SSA. Data were collected on consecutive children (birth to 16 years), presenting with gastroschisis, anorectal malformation, intussusception, appendicitis or inguinal hernia, over a minimum of 1 month, between October 2016 and April 2017. Participating hospitals completed a survey on their resources available for paediatric surgery.The primary outcome was all-cause in-hospital mortality. Mortality in SSA was compared with published benchmark mortality in HICs using χ2analysis. Generalised linear mixed models were used to identify patient-level and hospital-level factors affecting mortality. A p<0.05 was deemed significant.Results1407 children from 51 hospitals in 19 countries across SSA were studied: 111 with gastroschisis, 188 anorectal malformation, 225 intussusception, 250 appendicitis and 633 inguinal hernia. Mortality was significantly higher in SSA compared with HICs for all conditions: gastroschisis (75.5% vs 2.0%), anorectal malformation (11.2% vs 2.9%), intussusception (9.4% vs 0.2%), appendicitis (0.4% vs 0.0%) and inguinal hernia (0.2% vs 0.0%), respectively. Mortality was 41.9% (112/267) among neonates, 5.0% (20/403) in infants and 1.0% (7/720) in children. Paediatric surgical condition, higher American Society of Anesthesiologists score at primary intervention, and needing/receiving a blood transfusion were significantly associated with mortality on multivariable analysis.ConclusionMortality from common paediatric surgical conditions is unacceptably high in SSA compared with HICs, particularly for neonates. Interventions to reduce mortality should focus on improving resuscitation and timely transfer at the district level, and preoperative resuscitation and perioperative care at paediatric surgical centres.