bluuebunny/crossref_metadata_2025_split huggingface dataset:
Genetic optimization of hybrid clustering algorithm in mobile wireless sensor networks
Authors: M. Sangeetha , A. Sabari 
Published: February 2018

Purpose
This paper aims to provide a prolonging network lifetime and optimizing energy consumption in mobile wireless sensor networks (MWSNs). MWSNs have characteristics of dynamic topology due to the factors such as energy consumption and node movement that lead to create a problem in lifetime of the sensor network. Node clustering in wireless sensor networks (WSNs) helps in extending the network life time by reducing the nodes’ communication energy and balancing their remaining energy. It is necessary to have an effective clustering algorithm for adapting the topology changes and improve the network lifetime.

Design/methodology/approach
This work consists of two centralized dynamic genetic algorithm-constructed algorithms for achieving the objective in MWSNs. The first algorithm is based on improved Unequal Clustering-Genetic Algorithm, and the second algorithm is Hybrid K-means Clustering-Genetic Algorithm.

Findings
Simulation results show that improved genetic centralized clustering algorithm helps to find the good cluster configuration and number of cluster heads to limit the node energy consumption and enhance network lifetime.

Research limitations/implications
In this work, each node transmits and receives packets at the same energy level throughout the solution. The proposed approach was implemented in centralized clustering only.

Practical implications
The main reason for the research efforts and rapid development of MWSNs occupies a broad range of circumstances in military operations.

Social implications
The research highly gains impacts toward mobile-based applications.

Originality/value
A new fitness function is proposed to improve the network lifetime, energy consumption and packet transmissions of MWSNs.
Effects of Mn nanoparticle addition on wettability, microstructure and microhardness of low-Ag Sn-0.3Ag-0.7Cu-xMn(np) composite solders
Authors: Tang Yu , Luo Shaoming , Li Guoyuan , Yang Zhou , Hou Chaojun 
Published: February 2018

Purpose
The purpose of this paper is to investigate of the effects of Mn nanoparticle addition on the wettability, microstructure and microhardness of SAC0307-xMn(np) (SAC: Sn–Ag–Cu; x = 0, 0.02, 0.05, 0.1 and 0.3 Wt.%) composite solders.

Design/methodology/approach
The SAC0307-xMn(np) composite solders were prepared by mechanically mixing different weight percentages of Mn nanopowders into the SAC0307 solder paste with rosin flux. In this study, the wettability of the solders was studied using contact angle and spread ratio methods. Afterward, the microstructure of the solders was investigated using scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffractometry. Moreover, the microhardness of the solders was studied.

Findings
The wetting process of SAC0307-xMn(np) composite solders was found to experience four stages. Adding a small amount of Mn nanoparticles (x = 0.05 Wt.%) could improve the wettability compared to Mn-free solder. Beyond this level, the wettability deteriorated. The addition of Mn nanoparticles significantly refined the size and spacing of Ag3Sn grains in the solder matrix. When 0.1 Wt.% Mn nanoparticles was added, both the average size of the Ag3Sn grains and the spacing between the Ag3Sn grains decreased significantly and approached minimum values. Beyond this amount, the size and spacing between Ag3Sn grains increased slightly but remained smaller than those in the Mn-free solder matrix. The refined Ag3Sn grains increased the microhardness of the Mn-containing composite solders by 6-25 per cent, in good agreement with the prediction of the classic theory of dispersion strengthening.

Originality/value
The paper demonstrates that Mn nanoparticle addition could improve the SAC0307-xMn(np) solder wettability and reduce the grain size and spacing between Ag3Sn grains. The enhancement of the solder microhardness shows good correlation with the microstructure.
Reliability assessment of electronic assemblies under vibration by statistical factorial analysis approach
Authors: Gharaibeh Mohammad 
Published: February 2018

Purpose
This paper aims to present a reliability performance assessment of electronic packages subjected to harmonic vibration loadings by using a statistical factorial analysis technique. The effects of various geometric parameters, the size and thickness of the printed circuit board and component and solder interconnect dimensions on the fundamental resonant frequency of the assembly and the axial strain of the most critical solder joint were thoroughly investigated.

Design/methodology/approach
A previously published analytical solution for the problem of electronic assembly vibration was adopted. This solution was modified and used to generate the natural frequency and solder axial strains data for various package geometries. Statistical factorial analysis was used to analyze these data.

Findings
The results of the present study showed that the reliability of electronic packages under vibration could be significantly enhanced by selecting larger and thicker printed circuit boards and thinner and smaller electrical components. Additionally, taller and thinner solders might also produce better reliability behavior.

Originality/value
The results of this investigation can be very useful in the design process of electronic products in mechanical vibration environments.
Medicare Accountable Care Organizations of Diverse Structures Achieve Comparable Quality and Cost Performance
Authors: Comfort Leeann N. , Shortell Stephen M. , Rodriguez Hector P. , Colla Carrie H. 
Published: February 2018

ObjectiveTo examine whether an empirically derived taxonomy of Accountable Care Organizations (ACOs) is associated with quality and spending performance among patients of ACOs in the Medicare Shared Savings Program (MSSP).Data SourcesThree waves of the National Survey of ACOs and corresponding publicly available Centers for Medicare & Medicaid Services performance data for NSACO respondents participating in the MSSP (N = 204); SK&A Office Based Physicians Database from QuintilesIMS.Study DesignWe compare the performance of three ACO types (physician‐led, integrated, and hybrid) for three domains: quality, spending, and likelihood of achieving savings. Sources of performance variation within and between ACO types are compared for each performance measure.Principal FindingsThere is greater heterogeneity within ACO types than between ACO types. There were no consistent differences in quality by ACO type, nor were there differences in likelihood of achieving savings or overall spending per‐person‐year. There was evidence for higher spending on physician services for physician‐led ACOs.ConclusionsACOs of diverse structures perform comparably on core MSSP quality and spending measures. CMS should maintain its flexibility and continue to support participation of diverse ACOs. Future research to identify modifiable organizational factors that account for performance variation within ACO types may provide insight as to how best to improve ACO performance based on organizational structure and ownership.
Radiologic indicators for prediction of difficult laryngoscopy in patients with cervical spondylosis
Authors: Han Y. Z. , Tian Y. , Zhang H. , Zhao Y. Q. , Xu M. , Guo X. Y. 
Published: February 2018

BackgroundWe identified the most useful variables for prediction of difficult laryngoscopy in patients with cervical spondylosis according to physical indicators and preoperative skeletal X‐ray and soft tissue MRI measurements. We hypothesized that there was a closer association between difficult laryngoscopy and radiologic indicators.MethodsWe randomly enroled 315 patients undergoing elective cervical spine surgery and analysed the radiological and physical data in predicting difficult laryngoscopy.ResultsWe identified five variables that were most useful in predicting difficult laryngoscopy: the inter‐incisor gap (P= 0.006), modified Mallampati test score (P= 0.004), distance from the highest point of the hyoid bone to the mandibular body (P< 0.001), most antero‐inferior point of the upper central incisor tooth (P< 0.001), and length of the epiglottis (P= 0.002). Binary multivariate logistic regression analyses identified three factors that were independently associated with difficult laryngoscopy: the Mallampati score, distance from the hyoid bone to the mandibular body, and the anterior–inferior point of the upper central incisor tooth. The odds ratios and 95% confidence intervals were 1.547 (1.029–2.327), 1.222 (1.139–1.310), and 1.224 (1.133–1.322), respectively. The AUC for hyoid bone distance to mandibular body (0.832) was larger than that of anterior‐inferior point of the upper central incisor tooth (0.802,P> 0.05) and that of modified Mallampati test (0.602,P< 0.05).ConclusionDistance from the highest point of the hyoid bone to the mandibular body appears to be the most accurate indicator for difficult laryngoscopy in patients with cervical spondylosis.
Transferring and trading on insider information in the United States and Australia: just a case of happy hour drinks?
Authors: Chen Xiaoyan , Hodgson Allan , Linnenluecke Martina K. 
Published: February 2018

AbstractThis study examines and compares insider trading laws across Australia and the United States. Motivation is provided by academic studies that provide a global comparison of insider trading without analysis of divergent interpretations and liabilities. For example, sharing confidential information with friends over Friday night drinks may have completely different legal consequences across different countries. The possibility of higher or lower legal sanction offers research opportunities in the areas of government‐supervised firms, tipping to short sellers and insider trading when firms are cross‐listed in countries with different insider trading regimes.
Improving older people's life satisfaction via social networking site use: Evidence from China
Authors: Zhou Junjie 
Published: February 2018

ObjectiveThis study aimed to examine the pathways by which social networking sites (SNSs) can improve older people's life satisfaction.MethodsWe conducted an online survey in China that lasted eight weeks. Respondents were required to report their demographic characteristics and feelings regarding SNS use. Data were analysed using SPSS 20 and Amos 21.ResultsWe collected 596 valid samples. The empirical results show that SNS use improves older people's life satisfaction by reducing their loneliness and improving their self‐efficacy. Social support alleviates the negative effect of loneliness and enhances the positive effect of self‐efficacy on life satisfaction. Sex differences and education differences were significant. Men and less educated people had higher levels of life satisfaction.ConclusionPolicymakers should offer support to SNSs targeting older people and encourage them to provide more useful services. SNS operators should encourage social support among older users and pay attention to sex differences and education differences.
Argon attenuates multiorgan failure following experimental aortic cross‐clamping
Authors: Savary Guillaume , Lidouren Fanny , Rambaud Jérôme , Kohlhauer Matthias , Hauet Thierry , Bruneval Patrick , Costes Bruno , Cariou Alain , Ghaleh Bijan , Mongardon Nicolas , Tissier Renaud 
Published: February 2018

AimsArgon has been shown to prevent ischaemic injuries in several scenarios of regional ischaemia. We determined whether it could provide a systemic effect in a model of multiorgan failure (MOF) induced by aortic cross‐clamping.MethodsAnaesthetized rabbits were submitted to aortic cross‐clamping (30 min) and subsequent reperfusion (300 min). They were either ventilated with oxygen‐enriched air throughout the protocol [fraction of inspired oxygen (FiO2) = 30%; control group) or with a mixture of 30% oxygen and 70% argon (argon groups). In a first group treated with argon (‘Argon‐Total’), its administration was started 30 min before ischaemia and maintained throughout the protocol. In the two other groups, the administration was started either 30 min before ischaemia (‘Argon‐Pre’) or at the onset of reperfusion (‘Argon‐Post’), for a total duration of 2 h. Cardiovascular, renal and inflammatory endpoints were assessed throughout protocol.ResultsCompared with control, shock was significantly attenuated in Argon‐Total and Argon‐Pre but not Argon‐Post groups (e.g. cardiac output = 62±5 vs. 29 ± 5 ml min−1 kg−1 in Argon‐Total and control groups at the end of the follow‐up). Shock and renal failure were reduced in all argon vs. control groups. Histopathological examination of the gut showed attenuation of ischaemic lesions in all argon vs. control groups. Blood transcription levels of interleukin (IL) 1β, IL‐8, IL‐10 and hypoxia‐inducible factor 1α were not significantly different between groups.ConclusionArgon attenuated clinical and biological modifications of cardiovascular, renal and intestinal systems, but not the inflammatory response, after aortic cross‐clamping. The window of administration was crucial to optimize organ protection.
Variability and interpretation of communication taxonomy during robot‐assisted surgery: do we all speak the same language?
Authors: Raheem Sana , Ahmed Youssef E. , Hussein Ahmed A. , Johnson Amanda , Cavuoto Lora , May Paul , Cole Adam , Wang Derek , Ahmad Basim , Hasasneh Adam , Guru Khurshid A. 
Published: February 2018

ObjectiveTo investigate and analyse the different ways surgeons communicate with bedside assistants during robot‐assisted surgery (RAS).MethodsWe retrospectively reviewed video and audio recordings of 26 RAS procedures (23 prostatectomies and three cystectomies). Three cameras and eight lapel microphones were used to record the operating theatre environment. We identified five common tasks and categorized them into ‘specific’, ‘non‐specific’ and ‘unclear’ categories. We also determined the frequency, time to execute the task, inconveniences and acknowledgements associated with each category. The most efficient category was the one that took the shortest duration to accomplish and was associated with the fewest inconveniences.ResultsA total of 1 000 requests were made by three surgeons for six bedside assistants by three surgeons. The five identified tasks were: instrument change; clipping; suction; irrigation; and retraction. For instrument change, non‐specific requests were the most frequent compared with the other categories (77% vs 18% vs 5%; P < 0.001). For suction, specific requests were the most frequently used of the three categories (73% vs 27% vs 0%; P < 0.001) and this task was associated with the fewest inconveniences (38% vs 62%; P = 0.01). For clipping, irrigation and retraction, both specific and non‐specific requests were similar in terms of their frequency, action time and inconveniences. Comparing complete vs incomplete requests, incomplete requests had significantly shorter median action time (5 vs 8 s; P < 0.001) but did not significantly differ in terms of inconveniences and acknowledgement.ConclusionTo our knowledge, this is the first study to provide a detailed analysis of communication during RAS. It lays a foundation for standardized taxonomy to improve communication, surgical efficiency and patient safety.
Area of residual tumor is a robust prognostic marker for patients with rectal cancer undergoing preoperative therapy
Authors: Sakuyama Naoki , Kojima Motohiro , Kawano Shingo , Matsuda Yoko , Mino‐Kenudson Mari , Ochiai Atsushi , Ito Masaaki 
Published: February 2018

The aim of this study was to elucidate differences in the histological features of rectal cancer between patients treated with preoperative chemoradiotherapy and those treated with preoperative chemotherapy. Area of residual tumor (ART) was also evaluated for its utility as a potential prognostic marker between them. Sixty‐eight patients with rectal cancer who underwent sphincter‐saving surgery were enrolled in this study. Of these, 39 patients received preoperative chemoradiotherapy (CRT group) and 29 patients received preoperative (neoadjuvant) chemotherapy (NAC group). Area of residual tumor was determined by using morphometric software. Tumors in the two groups were compared for differences in their histological features and clinical outcomes. Tumors in the CRT and NAC groups varied greatly with regard to their histological features after preoperative therapy. Tumors in the CRT group showed more marked fibrosis than those in the NAC group. The total ART were significantly smaller in tumors in the CRT group than those in the NAC group. However, in circumferential resection margin‐negative pathologic stage 0‐III cases, clinical outcomes were not statistically different between the CRT and NAC groups. Both ART and pathologic TNM classification were associated with clinical outcome in preoperative CRT and NAC groups, but Dworak regression grade and fibrotic change were not. Tumors in those undergoing preoperative CRT and NAC were shown to differ significantly in their histological features. Area of residual tumor‐based assessment may provide useful prognostic information, regardless of preoperative therapy.
Antitumor activity of antibody against cytotoxic T lymphocyte epitope peptide of lymphocyte‐specific protein tyrosine kinase
Authors: Matsueda Satoko , Itoh Kyogo , Shichijo Shigeki 
Published: February 2018

Although humoral responses against CTL epitope peptides from lymphocyte‐specific protein tyrosine kinase (Lck) antigen have been observed in the majority of healthy donors and cancer patients, the biological activity of the antibody has not been determined. We investigated the biological activity of mAb against CTL epitope peptide of Lck antigen at positions 486‐494 (anti‐Lck‐486 mAb). This mAb induced dendritic cell maturation from murine bone marrow cells by the immune complex form in vitro, and inhibited tumor growth in association with a suppression of tumor‐infiltrating T cells, including T regulatory cells in a murine model using female BALB/cCrlCrlj mice (H‐2Kd). More potent tumor inhibition was observed when this mAb was given prior to peptide vaccination. These results may help to unveil the biological activity of anti‐Lck peptide antibodies against CTL epitope peptides.
Do social work education, job description, and cultural competence foster child‐welfare caseworkers' therapeutic alliances?
Authors: Cheng Tyrone C. , Lo Celia C. 
Published: February 2018

AbstractWe explored whether the strength of caseworkers' engagement with families in the child‐welfare system was associated with the caseworkers' academic degrees, job responsibilities and environments, and/or ethnicity. We extracted data from a national data set describing 1,714 caseworkers. Results confirmed significant association between caseworkers' confidence in their engagement with families and (a) master's‐ and bachelor's‐level social work education, (b) adequate supervision at work, (c) cultural‐diversity training, (d) job focus (screening/investigation, out‐of‐home placement, or reunification), and (e) homogeneous race/ethnicity of caseworker and client.
The Power of a “Maverick” in Collaborative Problem Solving: An Experimental Investigation of Individual Perspective‐Taking Within a Group
Authors: Hayashi Yugo 
Published: February 2018

AbstractIntegrating different perspectives is a sophisticated strategy for developing constructive interactions in collaborative problem solving. However, cognitive aspects such as individuals’ knowledge and bias often obscure group consensus and produce conflict. This study investigated collaborative problem solving, focusing on a group member interacting with another member having a different perspective (a “maverick”). It was predicted that mavericks might mitigate disadvantages and facilitate perspective taking during problem solving. Thus, 344 university students participated in two laboratory‐based experiments by engaging in a simple rule‐discovery task that raised conflicts among perspectives. They interacted with virtual partners whose conversations were controlled by multiple conversational agents. Results show that when participants interacted with a maverick during the task, they were able to take others’ perspectives and integrate different perspectives to solve the problem. Moreover, when participants interacted in groups with a positive mood, groups with a maverick outperformed groups having several perspectives.
Suppression of female melon fly, Zeugodacus cucurbitae, with cue‐lure and fipronil bait stations through horizontal insecticide transfer
Authors: Spafford Helen , Chou Ming Y. , Mau Ronald F.L. , Vargas Roger I. 
Published: February 2018

AbstractMelon fly, Zeugodacus cucurbitae (Coquillett) (Diptera: Tephritidae), is an important quarantine tephritid fruit fly with resident populations established in Hawai'i, USA. In the male‐annihilation approach, male flies are targeted using dispensers with cue‐lure (C‐L) and insecticides, typically organophosphates. The efficacy of the male annihilation approach is thought to be limited to individual male flies, contacting the lure and the pesticide, after which they die. Alternative classes of insecticides, such as fipronil, have been investigated for use in male‐annihilation. We hypothesized that ingestion of fipronil by male flies could lead to horizontal transfer and mortality in female flies. Horizontal insecticide transfer extends pesticide control beyond the individual contacting the toxicant through indirect contact via food sharing or other mechanisms. We tested the possibility for horizontal transfer of fipronil from male to female Z. cucurbitae through field and laboratory studies. Two repeated field trials were conducted to compare the numbers of female flies collected in fields treated with Amulet C‐L (0.34% fipronil active ingredient) bait stations, sanitation, and spot treatments of GF‐120 Fruit Fly Bait to numbers collected in fields where sanitation and spot‐treatments were used without Amulet C‐L. In fields with Amulet C‐L bait stations in conjunction with sanitation and weekly protein bait spot treatments of GF‐120 Fruit Fly Bait, female captures were significantly lower than those in field plots treated with weekly protein bait spot treatments and sanitation. In subsequent laboratory studies, all females died within 6 h after direct exposure to male flies that had access to Amulet C‐L for 1–4 min. The possibility that male regurgitant could be a mechanism for horizontal transfer and subsequent female mortality was determined by collecting regurgitated droplets from fipronil‐fed male flies and feeding them to males and females. Both male and female flies exposed to regurgitant from fipronil‐fed male flies or droplets containing fipronil had higher mortality than the male and female flies that were exposed to regurgitant or droplets with only the C‐L compound or sugar solution. Thus, female flies do experience mortality from exposure to regurgitant from males that have fed on fipronil laced solutions. This provides evidence of at least one mechanism of horizontal transfer of insecticide in tephritid fruit flies. These findings are discussed in the context of Z. cucurbitae integrated pest management programs in Hawai'i.