bluuebunny/crossref_metadata_2025_split huggingface dataset:
High voltage gain interleaved DC–DC converter with minimum current ripple
Authors: Fekri Mahmoud , Molavi Navid , Adib Ehsan , Farzanehfard Hosein 
Published: July 2017

A new interleaved high step‐up DC–DC converter is presented in this study which integrates coupled inductors and voltage multipliers techniques into interleaved structure to provide high voltage gain without extreme duty cycle. The voltage stress across power metal–oxide–semiconductor field‐effect transistors is very low, so low voltage rating switches with lower Rds(on) can be used. A modified version of winding cross‐coupled inductors technique is employed to minimise the input current ripple, and also the reverse recovery problem of the output diodes is alleviated because of the leakage inductance of the coupled inductors. Also, the leakage energy is absorbed and recycled to the output by the passive clamp scheme. In addition, automatic current sharing performance between the interleaved phases is established without any extra circuit. The operating principles of the proposed converter are explained and the theoretical analysis is provided, and in order to verify the effectiveness of the proposed converter, a 170 W, 30–360 V laboratory prototype is implemented.
Performance and economic analysis of a 27 kW grid‐connected photovoltaic system in Suriname
Authors: Raghoebarsing Amrita , Kalpoe Anand 
Published: July 2017

The performance of a grid‐connected photovoltaic (PV) system, under the Surinamese weather conditions, is monitored and reported. A measurement and data‐logging system provides inputs for the calculation of selected standard key performance indicators (KPI). Calculated KPI's are compared to expected values obtained from modelling the system using the PVSyst software. In addition, results from selected comparable studies are also used to compare the computed KPI's. Using one year data, the annual energy yield (Eac) totalled 37 MWh. This value is 6% higher than the one obtained from the modelling software. The calculated performance ratio (PR) and capacity factor (CF) of 74.5 and 15.5%, respectively, are also higher than the ones obtained from PVSyst. The difference can be attributed to the irradiance data (satellite data, monthly averages) used for input in the PVSyst software. The above mentioned calculated values for the PR and CF compared favourably with internationally reported values for systems located in regions with similar weather patterns. Using a total investment cost of 109,000 USD the levelised cost of energy (LCOE) calculated with the RETScreen software equals USD 0.36 /kWh. This LCOE is three times the current energy price in Suriname.
Inertial response from wind power plants during a frequency disturbance on the Hydro‐Quebec system – event analysis and validation
Authors: Asmine Mohamed , Langlois Charles‐Éric , Aubut Noël 
Published: July 2017

To better assess the contribution of wind power plants (WPPs) during disturbances, Hydro‐Québec TransÉnergie (HQT), the main transmission system operator in the Quebec Interconnection, uses on‐line monitoring to record data at the point of common coupling of each WPP. This data is used to analyse their performance during voltage and frequency disturbances. Until recently, very few WPPs were able to provide an inertial response (IR) for under‐frequency events. On 28 December 2015, a generation loss of 1700 MW caused a frequency nadir of 59.08 Hz on the system, to which most WPPs required to provide IR contributed significantly. The analysis of the event showed that the behaviour of the WPPs had a significant effect on the recovery of the system frequency. This study presents the performance analysis of WPPs during this under‐frequency event. The analysis is based on data collected from 25 large‐scale WPPs in operation and equipped with the IR feature as required by HQT. Field measurements and simulation results are used to emphasise the effect of the active power reduction during the recovery phase. Impacts of the IR from the WPPs as used on the Hydro‐Quebec system are discussed.
Metallicity effect on stellar granulation detected from oscillating red giants in open clusters
Authors: Corsaro E. , Mathur S. , García R. A. , Gaulme P. , Pinsonneault M. , Stassun K. , Stello D. , Tayar J. , Trampedach R. , Jiang C. , Nitschelm C. , Salabert D. 
Published: July 2017

Context. The effect of metallicity on the granulation activity in stars, and hence on the convective motions in general, is still poorly understood. Available spectroscopic parameters from the updated APOGEE-Kepler catalog, coupled with high-precision photometric observations from NASA’s Kepler mission spanning more than four years of observation, make oscillating red giant stars in open clusters crucial testbeds.
Aims. We aim to determine the role of metallicity on the stellar granulation activity by discriminating its effect from that of different stellar properties such as surface gravity, mass, and temperature. We analyze 60 known red giant stars belonging to the open clusters NGC 6791, NGC 6819, and NGC 6811, spanning a metallicity range from [Fe/H] ≃ − 0.09 to 0.32. The parameters describing the granulation activity of these stars and their frequency of maximum oscillation power, νmax, are studied while taking into account different masses, metallicities, and stellar evolutionary stages. We derive new scaling relations for the granulation activity, re-calibrate existing ones, and identify the best scaling relations from the available set of observations.
Methods. We adopted the Bayesian code Diamonds for the analysis of the background signal in the Fourier spectra of the stars. We performed a Bayesian parameter estimation and model comparison to test the different model hypotheses proposed in this work and in the literature.
Results. Metallicity causes a statistically significant change in the amplitude of the granulation activity, with a dependency stronger than that induced by both stellar mass and surface gravity. We also find that the metallicity has a significant impact on the corresponding time scales of the phenomenon. The effect of metallicity on the time scale is stronger than that of mass.
Conclusions. A higher metallicity increases the amplitude of granulation and meso-granulation signals and slows down their characteristic time scales toward longer periods. The trend in amplitude is in qualitative agreement with predictions from existing 3D hydrodynamical simulations of stellar atmospheres from main sequence to red giant stars. We confirm that the granulation activity is not sensitive to changes in the stellar core and that it only depends on the atmospheric parameters of stars.
Appendiceal Intussusception: A Diagnostic Challenge
Authors: Nica Adriana , Lakovski Yaniv , Freud Enrique , Samuk Inbal 
Published: July 2017

Introduction Appendiceal intussusception is a rare condition in children characterized by an invagination of the appendix into the cecum to various degrees. The treatment is appendectomy; however since symptoms are not specific, clinical diagnosis is challenging and frequently only intraoperative. We present a series of five patients with appendiceal intussusception and discuss features that may direct the pediatric surgeon to achieve early recognition and provide optimal treatment.
Materials and Methods The database of a tertiary medical center was retrospectively reviewed for all patients treated for appendiceal intussusception during the period from January 1995 to January 2016. Data collected by chart review included demographics, clinical characteristics, imaging studies, surgical technique, and outcome. The findings were analyzed by descriptive statistics.
Results This series included five patients (two females and three males) with ages ranging between 27 and 42 months (mean: 35.2). Patients presented with intermittent abdominal pain (IAP, all five patients), alternate vomiting (three of five patients), alternate diarrhea (two of five patients), fever (two of five patients), and rectal bleeding (one of five patients). The average length of symptoms was 22.6 days. Eighteen diagnostic studies were performed, including abdominal ultrasound for all patients, barium enema for three patients with secondary ileocolic intussusception, and abdominal computed tomography (CT) for one patient. The average number of studies per patient was 3.6. In surgery, the appendiceal intussusception was found to be complete in four patients, whereas it was partial in the remaining patient. In all patients, appendectomy was performed with resection of a small rim of cecal wall due to marked congestion and edema in an attempt to decrease recurrence.
Conclusion The mainstay of clinical presentation is intermittent abdominal pain while patients may be completely asymptomatic between attacks. Appendiceal intussusception may act as a leading point to ileocolic intussusception and is frequently concealed by it. The treatment is appendectomy. Both pediatric surgeons and radiologists should be aware of this occurrence to provide adequate management and avoid complications.
A Comparison of Rollback Ratio between Bicruciate Substituting Total Knee Arthroplasty and Oxford Unicompartmental Knee Arthroplasty
Authors: Iriuchishima Takanori , Ryu Keinosuke 
Published: July 2017

AbstractThe purpose of this study was to compare the rollback ratio in bicruciate substituting (BCS) total knee arthroplasty (TKA) and bicruciate-retaining Oxford unicompartmental knee arthroplasty (UKA). In this study, 64 subjects (64 knees) undergoing BCS-TKA (Journey II: Smith and Nephew) and 50 subjects (50 knees) undergoing Oxford UKA (Zimmer-Biomet holdings, Inc., IN) were included. Approximately 6 months after surgery, and when the subjects had recovered their knee range of motion, following the Laidlow's method, lateral radiographic imaging of the knee was performed with active full knee flexion. The most posterior tibiofemoral contact point was measured for the evaluation of femoral rollback (rollback ratio). Flexion angle was also measured using the same radiograph and the correlation of rollback and flexion angle was analyzed. As a control, radiographs of the asymptomatic contralateral knees of subjects undergoing Oxford UKA were evaluated (50 knees). The rollback ratios of the BCS-TKA, Oxford UKA, and control knees were 37.9 ± 4.9, 35.7 ± 4.2, and 35.3 ± 4.8% respectively. No significant difference in rollback ratio was observed among the three groups. The flexion angles of the BCS-TKA, Oxford UKA, and control knees were 123.8 ± 8.4, 125.4 ± 7.5, and 127 ± 10.3 degrees, respectively. No significant difference in knee flexion angle was observed among the three groups. Significant correlation between rollback ratio and knee flexion angle was observed (p = 0.002; Pearson's correlation coefficient = − 0.384). BCS-TKA showed no significant difference in rollback ratio when compared with control knees and Oxford UKA knees. The BCS-TKA design is likely to reproduce native anterior cruciate ligament and posterior cruciate ligament function, and native knee rollback.
Infrapatellar Fat Pad Impingement: A Systematic Review
Authors: Genin Jason , Faour Mhamad , Ramkumar Prem , Yakubek George , Khlopas Anton , Chughtai Morad , King Dominic , Mont Michael 
Published: July 2017

AbstractInfrapatellar fat pad impingement represents a source of anterior knee pain that is often overlooked. Due to the scarcity of reports related to this disorder, we conducted a systematic review of the literature related to infrapatellar fat pad impingement in evaluating the following: (1) clinical presentation, (2) imaging, (3) management, and (4) clinical outcomes. A systematic review was conducted investigating all available primary literature related to the clinical presentation, imaging, management, and outcomes of infrapatellar fat pad impingement syndrome. A total of 15 studies (9 case reports, 1 case series, and 5 retrospective studies) comprising 167 patients met eligibility criteria for this review. Patients with infrapatellar fat pad impingement were found to most often present with anterior knee pain that worsened with activity, and was frequently associated with trauma. Anterior knee pain, tenderness to palpation over the patellar tendon, loss in terminal extension, and pain with direct pressure on the medial or lateral side of the patella with the knee extended was often found on examination. Although patients may have classic imaging findings on magnetic resonance imaging (localized edema of the infrapatellar fat pad, deep fluid-filled infrapatellar bursa, nonvisualization of clefts, fibrosis, and calcifications), not all patients had positive imaging findings, thus making infrapatellar fat pad impingement a clinical diagnosis. Treatment begins with nonoperative management, but in recalcitrant cases, patients can be surgically treated with arthroscopic fat pad resection. Most patients who undergo operative treatment report improvement or complete resolution of symptoms in terms of pain and range of motion, and are able to return to work. To the best of our knowledge, this is the first comprehensive review on infrapatellar fat pad impingement to better aid the orthopaedic surgeons in diagnosing, treating, and managing patient expectations for this often overlooked knee pathology.
Auf der Suche
Authors: Höffken Dirk 
Published: July 2017

Zusammenfassung
Menschenbilder in der psychiatrischen Pflege Beeinflusst das Menschenbild
die Beziehungsarbeit in der psychiatrischen Pflege? Auf jeden Fall, findet unser
Autor und plädiert dafür, Patienten nicht als defekte Maschine, sondern als
Suchende zu betrachten. Denn dann macht es wenig Sinn, Symptome ausschließlich
medikamentös zu unterdrücken. Stattdessen ermöglicht es den Pflegenden, die
Rolle des reflektierenden und reflektierten Begleiters einzunehmen und den
Patienten bei der Suche nach seinem eigenen Weg zu unterstützen.
Language socialization and making sense of place
Authors: Schieffelin Bambi B. 
Published: July 2017

Abstract
From the time we are small, senses of place organize and give meaning to our everyday activities. Little is known, however, about the role language plays in how people come to inhabit or lose a sense of place. Using the theoretical paradigm of language socialization to examine these processes (inclusion and emplacement, and exclusion and displacement), this chapter uses ethnographic and linguistic data from Bosavi (Papua New Guinea) to demonstrate how young children’s everyday verbal activities include place-naming, identification, and representation to index on-going activities and relationships, establishing strong affective connections to place. In contrast, Christian missionization, with its sense of space, changed local meanings of place, and the ways in which Bosavi speakers talked about it and each other.
The politics of place-making and belonging through language choice within center-periphery dynamics in Limburg, The Netherlands
Authors: Thissen Lotte 
Published: July 2017

Abstract
This contribution analyses a case of carnival celebration in Maasniel, Limburg, the Netherlands, a village that was annexed as a neighborhood of the larger city of Roermond in 1959. During the event, the Dutch ritual of Sinterklaas was combined with the carnival celebration, resulting in a staged language conflict between Dutch and dialect. I argue that this language conflict was used by the actors on stage to engage in the politics of place-making and belonging. These politics express who and what practices are perceived as in and out of place during this particular carnival event. I show that the actors of the event, through Bakhtinian carnivalesque manners, centralize the carnival celebration, dialect use, and Maasniel while peripheralizing Sinterklaas celebration practices, the use of Dutch, and the city of Roermond. I argue that the eventual switch from Dutch to dialect may be considered as a way to resist and subvert dominant center-periphery ideas.
Analysis of properties for in situ Al2O3p/A356 composites synthesised from the Al-SiO2 system
Authors: Meng Mingai , Chen Gang , Zhang Zhenya , Zhao Yutao 
Published: July 2017

In situ Al2O3p/A356 composites with different particle volume fractions were successfully synthesised from the Al-SiO2 system by a direct-melt reaction. γ-Al2O3 was first produced during the reaction between Al and SiO2, and the phase transformation from γ-Al2O3 to α-Al2O3 then occurred at higher temperatures (1050°C), resulting in a volume contraction. The α-Al2O3p/A356 composite exhibited a reduction in dendrite cell size that was 1.5–2 greater than for the matrix alloy cast using the same conditions. A 10% particle volume fraction yielded optimum mechanical properties, with values for the yield stress, tensile strength, elongation and microhardness of 132 MPa, 268 MPa, 5.1% and 107.2 HV, respectively. These corresponded to increases 50, 31, 19 and 47%, respectively, when compared to the matrix. This paper is part of a thematic issue on Light Alloys.
Cloud-based interactive analytics for terabytes of genomic variants data
Authors: Pan Cuiping , McInnes Gregory , Deflaux Nicole , Snyder Michael , Bingham Jonathan , Datta Somalee , Tsao Philip S 
Published: July 2017

Abstract

Motivation
Large scale genomic sequencing is now widely used to decipher questions in diverse realms such as biological function, human diseases, evolution, ecosystems, and agriculture. With the quantity and diversity these data harbor, a robust and scalable data handling and analysis solution is desired.

Results
We present interactive analytics using a cloud-based columnar database built on Dremel to perform information compression, comprehensive quality controls, and biological information retrieval in large volumes of genomic data. We demonstrate such Big Data computing paradigms can provide orders of magnitude faster turnaround for common genomic analyses, transforming long-running batch jobs submitted via a Linux shell into questions that can be asked from a web browser in seconds. Using this method, we assessed a study population of 475 deeply sequenced human genomes for genomic call rate, genotype and allele frequency distribution, variant density across the genome, and pharmacogenomic information.

Availability and implementation
Our analysis framework is implemented in Google Cloud Platform and BigQuery. Codes are available at https://github.com/StanfordBioinformatics/mvp_aaa_codelabs.

Supplementary information
Supplementary data are available at Bioinformatics online.
iDNA4mC: identifying DNA N4-methylcytosine sites based on nucleotide chemical properties
Authors: Chen Wei , Yang Hui , Feng Pengmian , Ding Hui , Lin Hao 
Published: July 2017

Abstract

Motivation
DNA N4-methylcytosine (4mC) is an epigenetic modification. The knowledge about the distribution of 4mC is helpful for understanding its biological functions. Although experimental methods have been proposed to detect 4mC sites, they are expensive for performing genome-wide detections. Thus, it is necessary to develop computational methods for predicting 4mC sites.

Results
In this work, we developed iDNA4mC, the first webserver to identify 4mC sites, in which DNA sequences are encoded with both nucleotide chemical properties and nucleotide frequency. The predictive results of the rigorous jackknife test and cross species test demonstrated that the performance of iDNA4mC is quite promising and holds high potential to become a useful tool for identifying 4mC sites.

Availability and implementation
The user-friendly web-server, iDNA4mC, is freely accessible at http://lin.uestc.edu.cn/server/iDNA4mC.
Nutritional Supplementation With Physical Activity Improves Muscle Composition in Mobility-Limited Older Adults, The VIVE2 Study: A Randomized, Double-Blind, Placebo-Controlled Trial
Authors: Englund Davis A , Kirn Dylan R , Koochek Afsaneh , Zhu Hao , Travison Thomas G , Reid Kieran F , von Berens Åsa , Melin Michael , Cederholm Tommy , Gustafsson Thomas , Fielding Roger A 
Published: July 2017

AbstractBackgroundNutritional supplementation and physical activity have been shown to positively influence muscle mass and strength in older adults. The efficacy of long-term nutritional supplementation in combination with physical activity in older adults remains unclear.MethodsMobility-limited (short physical performance battery [SPPB] ≤9) and vitamin D insufficient (serum 25(OH) D 9–24 ng/mL) older adults were recruited for this study. All subjects participated in a physical activity program. Subjects were randomized to consume a daily nutritional supplement (150 kcal, 20 g whey protein, 800 IU vitamin D, 119 mL beverage) or placebo (30 kcal, nonnutritive, 119 mL). In a prespecified secondary analysis, we examined total-body composition (dual energy X-ray absorptiometry), thigh composition (computed tomography), and muscle strength, power, and quality before and after the 6-month intervention.ResultsOne hundred and forty-nine subjects were randomized into the study [mean (standard deviation, SD) age 78.5 (5.4) years; 46.3% female; mean (SD) short physical performance battery 7.9 (1.2); mean (SD) vitamin D 18.7 (6.4) ng/mL]. After the intervention period both groups demonstrated improvements in muscle strength, body composition, and thigh composition. Nutritional supplementation lead to further losses of intermuscular fat (p = .049) and increased normal muscle density (p = .018).ConclusionsSix months of physical activity resulted in improvements in body composition, subcutaneous fat, intermuscular fat, and strength measures. The addition of nutritional supplementation resulted in further declines in intermuscular fat and improved muscle density compared to placebo. These results suggest nutritional supplementation provides additional benefits to mobility-limited older adults undergoing exercise training.ClinicalTrials.gov Identifier: NCT01542892
Dural Closure in Confined Spaces of the Skull Base with Nonpenetrating Titanium Clips
Authors: Glenn Chad A , Baker Cordell M , Burks Joshua D , Conner Andrew K , Smitherman Adam D , Sughrue Michael E 
Published: July 2017

Abstract

BACKGROUND
Dural repair in areas with limited operative maneuverability has long been a challenge in skull base surgery. Without adequate dural closure, postoperative complications, including cerebrospinal fluid (CSF) leak and infection, can occur.

OBJECTIVE
To show a novel method by which nonpenetrating, nonmagnetic titanium microclips can be used to repair dural defects in areas with limited operative access along the skull base.

METHODS
We reviewed 53 consecutive surgical patients in whom a dural repair technique utilizing titanium microclips was performed from 2013 to 2016 at our institution. The repairs primarily involved difficult-to-reach dural defects in which primary suturing was difficult or impractical. A detailed surgical technique is described in 3 selected cases involving the anterior, middle, and posterior fossae, respectively. An additional 5 cases are provided in more limited detail to demonstrate clip artifact on postoperative imaging. Rates of postoperative CSF leak and other complications are reported.

RESULTS
The microclip technique was performed successfully in 53 patients. The most common pathology in this cohort was skull base meningioma (32/53). Additional surgical indications included traumatic dural lacerations (9/53), nonmeningioma tumors (8/53), and other pathologies (4/53). The clip artifact present on postoperative imaging was minor and did not interfere with imaging interpretation. CSF leak occurred postoperatively in 3 (6%) patients. No obvious complications attributable to microclip usage were encountered.

CONCLUSION
In our experience, intracranial dural closure with nonpenetrating, nonmagnetic titanium microclips is a feasible adjunct to traditional methods of dural repair.