bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pattern recognition of head movement based on mechanomyography and its application
Authors: Gu Xiaolin , Wu Qing , Zhang Yue , Zhong Hao , Zhang Shengli , Xia Chunming , Yu Jing 
Published: July 2019

Abstract
The first part of this study investigated pattern recognition of head movements based on mechanomyography (MMG) signals. Four channel MMG signals were collected from the sternocleidomastoid (SCM) muscles and the splenius capitis (SPL) muscles in the subjects’ neck when they bowed the head, raised the head, side-bent to left, side-bent to right, turned to left and turned to right. The MMG signals were then filtered, normalized and divided using an unequal length segmentation algorithm into a single action frame. After extracting the energy features of the wavelet packet coefficients and the feature of the principal diagonal slices of the bispectrum, the dimension of the energy features were reduced by the Fisher linear discriminant analysis (FLDA). Finally, all the features were classified through the support vector machine (SVM) classifier. The recognition rate was up to 95.92%. On this basis, the second part of this study used the head movements to control a car model for simulating the control of a wheelchair, and the success rate was 85.74%.
New record of the rare brown alga Dictyota hauckiana from Vietnam
Authors: Nguyen-Nhat Nhu-Thuy , Dao Viet-Ha , Nguyen Xuan-Vy 
Published: July 2019

Abstract
In the present paper, Dictyota hauckiana is reported for the first time from Vietnam. It was found growing with other marine macroalgae nearshore, at 1–2 m depth in Ninh Hai waters, Ninh Thuan province. Morphological observations and phylogenetic analysis based on the concatenated rbcL and psbA are presented. There are now 13 species of Dictyota known from Vietnamese waters.
A study on reference interval transference via linear regression
Authors: Mu Runqing , Yun Ke , Yu Xiaoou , Cheng Shitong , Ma Ming , Zhang Xin , Wang Shuo , Zhao Min , Shang Hong 
Published: July 2019

Abstract

Background
Reference intervals (RIs) transference can expand the applicability of established RIs. However, the study on transference methodology is insufficient, and RIs validation based on small samples cannot adequately identify transferred risk under complex situations. This study aimed to find appropriate conditions to ensure the effect of transference.

Methods
We established the RIs of Roche and Beckman systems for 27 analytes based on 681 healthy individuals. Roche RIs were converted into the Beckman RIs using linear regression (least squares method) which is divided into two methods – Methodref (500 test numbers with relatively narrow data range) and Methodep (80 test numbers with relatively wide data range). Taking the RIs established by Beckman results as standard, we assessed the accuracy, precision and trueness of transferred results under various conditions.

Results
A total of 29.6% and 48.1% of analytes were consistent between the two systems for the lower and upper reference limits, respectively. The concordance rates between transferred and measured RIs for Methodref were up to 74.1% and 92.6%, which were better than Methodep (44.4% and 59.3%). The CV of transferred reference limits decreased gradually with increasing test number under the same data range. For most analytes, excluding some electrolyte tests, we could obtain accurate results when r > 0.800 and the test number was sufficient regardless of the regression equation types.

Conclusions
Transferability of RIs is affected by many factors, such as correlation, test number, regression equation type, and quality requirement. To reduce the risk of transference, it is very important to select right method with reasonable conditions.
An updated review on TiNi alloy for biomedical applications
Authors: Zhu Jianing , Zeng Qunfeng , Fu Tao 
Published: July 2019

Abstract
This manuscript has provided an overview of the development of TiNi alloys and their applications in biomedicine. The microstructures and properties of TiNi alloys are first introduced. The breakthroughs in the manufacturing and applications in biomedicine of TiNi alloys in recent years have been achieved by scientists and are presented in the present paper. It is well known that the properties of TiNi alloys are affected by the modification methods on the surface of bulk TiNi alloys. The main preparation technologies of TiNi alloy coatings are evaluated, with particular attention to several spray technologies. Then, the biocompatibility, strong anticorrosion and antiwear properties, and mechanism of TiNi alloys are also described in detail. Several advanced manufacturing processes of TiNi alloys are also briefly outlined such as selective laser melting and spark plasma sintering. The performance of TiNi alloy coatings prepared by thermal spraying techniques are fully qualified for medical applications. Thermal spraying techniques have great prospects in reducing the cost and improving the quality of TiNi alloy medical products.
Recurrent pleural effusion and pain in the shoulder in women of reproductive age could have a gynecological cause: case series
Authors: Matak Luka , Bačić Ivan , Mihanović Jakov , Lisica-Šikić Nataša , Dukić Branko , Petani Barbara , Stanojević Milan 
Published: July 2019

Abstract

Background
Endometriosis is a benign disorder defined as the presence of endometrial glands and stroma outside of the uterine cavity. It has been estimated that approximately 10% of the women of reproductive age and 30–50% of the women with infertility are affected.

Case presentation
We report two nulliparous patients with recurrent pleural effusion and pain in the right shoulder highly suspicious for thoracic endometriosis syndrome (TES).

Conclusion
The objective of this study was to present patients with unusual symptoms related to gynecological disease. The second aim was to show our single institution experience as a second level hospital in terms of treatment and diagnosis of TES and diaphragmatic endometriosis.
Embedding a longitudinal diagnostic reasoning curriculum in a residency program using a bolus/booster approach
Authors: Harris Katherine I. , Rowat Jane S. , Suneja Manish 
Published: July 2019

Abstract

Background
Diagnostic reasoning skills are essential to the practice of medicine, yet longitudinal curricula to teach residents and evaluate performance in this area is lacking. We describe a longitudinal diagnostic reasoning curriculum implemented in a university-based internal medicine residency program and self-evaluation assessment of the curriculum’s effectiveness.

Methods
A longitudinal diagnostic reasoning curriculum (bolus/booster) was developed and implemented in the fall of 2015 at the University of Iowa. R1, R2, and R3 cohorts were taught the “bolus” curriculum at the beginning of each academic year followed by a “booster” component to maintain and build upon diagnostic reasoning skills taught during the “bolus” phase. Self-administered diagnostic thinking inventory (DTI) scores were collected in the spring of pre-curriculum (baseline, 2014–2015) and post-curriculum (2016–2017).

Results
The overall DTI scores improved in the R1 cohort, although statistically significant differences were not seen with R2s and R3s. In the original DTI categories, R1s improved in both flexibility of thinking and structure of thinking, the R2s improved in structure of thinking and the R3s did not improve in either category. R1s showed improvement in three of the four subcategories – data acquisition, problem representation, and hypothesis generation. The R2s improved in the subcategory of problem representation. R3s showed no improvement in any of the subcategories. The R3 cohort had higher mean scores in all categories but this did not reach statistical significance.

Conclusions
Our program created and successfully implemented a longitudinal diagnostic reasoning curriculum. DTI scores improved after implementation of a new diagnostic reasoning curriculum, particularly in R1 cohort.
High intensity intermittent training induces anti-inflammatory cytokine responses and improves body composition in overweight adolescent boys
Authors: Alizadeh Hamid , Safarzade Alireza 
Published: August 2019

Abstract

Background
Anti-inflammatory cytokines, interleukin-4 (IL-4) and interleukin-13 (IL-13) modulate systemic energy metabolism through modifying body composition parameters. Hence, this study aimed at overweight adolescent boys to explore the effect of high intensity intermittent training (HIIT) on these anti-inflammatory cytokines and body composition parameters.

Materials and methods
Twenty overweight adolescent boys [aged: 18.0 ± 1.5 years, weight: 81.8 ± 4.3 kg, body mass index (BMI): 27.6 ± 0.8 kg/m2] completed this study. The subjects were randomly assigned into two groups of control (CG, n = 10) and training (TG, n = 10). Subjects in the TG performed their training sessions 3 days/week for 6 weeks. The baseline serum values of IL-4 and IL-13 and anthropometric features were measured 1 day before the beginning of exercise intervention and 1 day after the last training session in a fasting state.

Results
Six weeks of HIIT significantly increased the baseline serum levels of IL-4 (p = 0.022) and IL-13 (p = 0.014) in overweight adolescent boys. In addition, body weight (BW), BMI and body fat percent (BF%) were reduced in response to HIIT. Moreover, significantly negative correlations were found between changes of IL-4 and IL-13 with changes of BW, BMI and BF%.

Conclusions
HIIT seems to be an appropriate exercise modality for overweight adolescent boys to induce an anti-inflammatory cytokine response and, to improve body composition.
Thioredoxin inhibitor PX-12 induces mitochondria-mediated apoptosis in acute lymphoblastic leukemia cells
Authors: Ehrenfeld Vanessa , Fulda Simone 
Published: July 2019

Abstract
Imbalances in redox homeostasis have been described to be involved in the development, progression and relapse of leukemia. As the thioredoxin (Trx) system, one of the major cellular antioxidant networks, has been implicated in acute lymphoblastic leukemia (ALL), we investigated the therapeutic potential of Trx inhibition in ALL. Here, we show that the Trx inhibitor PX-12 reduced cell viability and induced cell death in a dose- and time-dependent manner in different ALL cell lines. This antileukemic activity was accompanied by an increase in reactive oxygen species (ROS) levels and enhanced PRDX3 dimerization. Pre-treatment with the thiol-containing ROS scavenger N-acetylcysteine (NAC), but not with non-thiol-containing scavengers α-tocopherol (α-Toc) or Mn(III)tetrakis(4-benzoic acid) porphyrin chloride (MnTBAP), significantly rescued PX-12-induced cell death. Furthermore, PX-12 triggered activation of BAK. Importantly, knockdown of BAK reduced PX-12-stimulated ROS production and cell death. Similarly, silencing of NOXA provided significant protection from PX-12-mediated cell death. The relevance of mitochondria-mediated, caspase-dependent apoptosis was further supported by data showing that PX-12 triggered cleavage of caspase-3 and that addition of the broad-range caspase inhibitor carbobenzoxy-valyl-alanyl-aspartyl-[O-methyl]-fluoromethylketone (zVAD.fmk) potently blocked cell death upon PX-12 treatment. This study provides novel insights into the mechanisms of PX-12-induced cell death in ALL and further highlights the therapeutic potential of redox-active compounds in ALL.
Chronic health conditions and adolescent friendship: perspectives from social network analysis
Authors: Long Emily , Barrett Tyson , Lockhart Ginger 
Published: July 2019

Abstract

Objective
The current study uses methods from social network analysis to examine the relationship between chronic health conditions (CHCs) and adolescent friendships. Particular attention is given to the processes of peer marginalization, peer withdrawal and homophily related to CHCs.

Methods
Exponential random graph models were used to investigate the extent to which a CHC is associated with patterns in adolescent friendship connections, while controlling for important social network properties and covariates. The study uses cross-sectional data from six small US high schools (n = 461) within the National Longitudinal Study of Adolescent to Adult Health.

Results
Findings demonstrate no significant differences between adolescents with CHCs and adolescents without CHCs in the number of incoming friendship nominations (peer marginalization) or outgoing friendship nominations (peer withdrawal). In addition, similarity in CHCs (homophily) was not significantly related to friendship between two individuals.

Conclusions
In sum, the presence of an adolescent CHC was not significantly associated with adolescent social network structure, including peer marginalization, peer withdrawal, and homophily related to CHCs, after controlling for alternative social network processes. Although previous literature suggests that adolescents with CHCs experience negative social consequences, the current findings demonstrate that the social network structure of adolescents with CHCs did not differ significantly from that of their peers without CHCs. Thus, findings from the current study suggest that CHCs are not related to objective reductions in social connections.
The correlation between marital satisfaction and childbearing characteristics in women in Tehran
Authors: Ghahremani Fereshte , Ahmadi Doulabi Mahbobeh , Eslami Mohammad 
Published: July 2019

Abstract

Background
Pregnancy and childbearing can change the relationship between a couple and their degree of marital satisfaction.

Objectives
The present study was conducted to determine the effect of women’s childbearing characteristics, including age at marriage, childbearing age, the interval between marriage and the birth of the first child, the number of children, age differences between children and children’s gender composition (only sons, only daughters or both sons and daughters) on marital satisfaction in women of childbearing age in Tehran.

Materials and methods
This descriptive correlational study was conducted on 213 married females aged 15–45 years presenting to health centers in Tehran in 2016. The demographic questionnaire, the Enrich Marital Satisfaction Scale and a devised questionnaire on childbearing were used for data collection. The data collected were analyzed with SPSS-17 using descriptive statistics (mean and standard deviation) and Pearson’s correlation test, the analysis of variance (ANOVA) and the stepwise regression test.

Results
According to the stepwise regression test, of all the factors associated with marital satisfaction, the number of children showed the highest correlation with marital satisfaction (p < 0.001, r = −0.22). In those with three children, the age difference between the second and third children had the highest correlation with marital satisfaction (p < 0.001, r = −0.5). The variables of age at first childbirth (r = 0.18) and children’s gender composition were also significantly related to marital satisfaction (p < 0.005).

Conclusion
The findings suggest that of all the factors associated with marital satisfaction, the number and spacing of children affect marital satisfaction.
Best Precision–Recall Confidence Threshold and F-Measure to Determine Quality of Camel Meat by Support Vector Regression Based Electronic Nose
Authors: Varidi Mohammad J. , Varidi Mehdi , Vajdi Meisam , Sharifpour Azam , Akbarzadeh-T Mohammad-R. 
Published: July 2019

Abstract
Maintaining fresh quality of camel meat and devising an effective validation instrument were the goals of this project. The minced samples were packed in bags with five different atmospheres and stored 20 days at 4 °C. Head space gas analysis and total viable count of bacteria were performed as references. Meat samples were tested with an electronic nose machine through dynamic sampling. Principal component analysis technique resulted in two distinct clusters in consistence with reference methods. Carbon dioxide was the best modified atmosphere to retain meat freshness. Support vector regression was trained with different confidence thresholds. The best precision–recall and F-measure values were obtained at threshold 0.5 that are promising to avoid false-positive and false-negative diagnoses which would be very crucial for regulatory decision-making organizations.
Comparative Analysis of High Speed 20/20 Gbps OTDM-PON, WDM-PON and TWDM-PON for Long-Reach NG-PON2
Authors: Kumari Meet , Sharma Reecha , Sheetal Anu 
Published: July 2019

Abstract
Nowadays, bandwidth demand is enormously increasing, that causes the existing passive optical network (PON) to become the future optical access network. In this paper, next generation passive optical network 2 (NG-PON2) based, optical time division multiplexing passive optical network (OTDM-PON), wavelength division multiplexing passive optical network (WDM-PON) and time & wavelength division multiplexing passive optical network (TWDM-PON) systems with 20 Gbps (8 × 2.5 Gbps) downstream and 20 Gbps (8 × 2.5 Gbps) upstream capacity for eight optical network units has been proposed. The performance has been compared by varying the input power (−6 to 27 dBm) and transmission distance (10–130 km) in terms of Q-factor and optical received power in the presence of fiber noise and non-linearities. It has been observed that TWDM-PON outperforms OTDM-PON and WDM-PON for high input power and data rate (20/20 Gbps). Also, TWDM-PON shows its superiority for long-reach transmission up to 130 km, which is a cost-effective solution for future NG-PON2 applications.
Acoustic identification of two morphologically similar bat species, Miniopterus magnater and Miniopterus fuliginosus (Chiroptera, Miniopteridae)
Authors: Wu Hui , Jiang Tinglei , Liu Sen , Lu Guanjun , Feng Jiang 
Published: July 2019

Abstract
Bats play important roles in ecosystems, and are thus considered bioindicators. Libraries of echolocation calls provide huge potential resources for bat species identifications, ecological studies and conservation surveys. Here, the echolocation calls of two morphologically similar bat species (Miniopterus magnater and Miniopterus fuliginosus) were recorded and described in order to characterize vocal signatures for field identification in China. Both M. magnater and M. fuliginosus emitted short frequency modulated echolocation calls with narrow bandwidths. Each call of the former species included two harmonics, with the first harmonic being the strongest, whereas calls of the latter species normally contained one harmonic. Although call durations were similar between the two species, there were significant differences in start, end and peak frequencies between M. magnater and M. fuliginous. The results showed that 92.3% of all calls recorded in China were attributed to the correct species based on spectral features of echolocation calls. We concluded that echolocation calls are valuable characters for the identification of morphologically similar bat species.
Properties and Inference for a New Class of Generalized Rayleigh Distributions with an Application
Authors: Biçer Hayrinisa Demirci 
Published: July 2019

Abstract
In the present paper, we introduce a new form of generalized Rayleigh distribution called the Alpha Power generalized Rayleigh (APGR) distribution by following the idea of extension of the distribution families with the Alpha Power transformation. The introduced distribution has the more general form than both the Rayleigh and generalized Rayleigh distributions and provides a better fit than the Rayleigh and generalized Rayleigh distributions for more various forms of the data sets. In the paper, we also obtain explicit forms of some important statistical characteristics of the APGR distribution such as hazard function, survival function, mode, moments, characteristic function, Shannon and Rényi entropies, stress-strength probability, Lorenz and Bonferroni curves and order statistics. The statistical inference problem for the APGR distribution is investigated by using the maximum likelihood and least-square methods. The estimation performances of the obtained estimators are compared based on the bias and mean square error criteria by a conducted Monte-Carlo simulation on small, moderate and large sample sizes. Finally, a real data analysis is given to show how the proposed model works in practice.
Nonfragile observer-based guaranteed cost finite-time control of discrete-time positive impulsive switched systems
Authors: Liu Leipo , Xing Hao , Cao Xiangyang , Cai Xiushan , Fu Zhumu 
Published: July 2019

Abstract
This paper considers the nonfragile observer-based guaranteed cost finite-time control of discrete-time positive impulsive switched systems(DPISS). Firstly, the positive observer and nonfragile positive observer are designed to estimate the actual state of the underlying systems, respectively. Secondly, by using the average dwell time(ADT) approach and multiple linear co-positive Lyapunov function (MLCLF), two guaranteed cost finite-time controller are designed and sufficient conditions are obtained to guarantee the corresponding closed-loop systems are guaranteed cost finite-time stability(GCFTS). Such conditions can be solved by linear programming. Finally, a numerical example is provided to show the effectiveness of the proposed method.
Algebraic loop structures on algebra comultiplications
Authors: Lee Dae-Woong 
Published: July 2019

Abstract
In this paper, we study the algebraic loop structures on the set of Lie algebra comultiplications. More specifically, we investigate the fundamental concepts of algebraic loop structures and the set of Lie algebra comultiplications which have inversive, power-associative and Moufang properties depending on the Lie algebra comultiplications up to all the possible quadratic and cubic Lie algebra comultiplications. We also apply those notions to the rational cohomology of Hopf spaces.
Crystal structure of (E)-4-bromo-N-(pyridin-2-ylmethylene)aniline, C12H9BrN2
Authors: Diko Nyameka , Zamisa Sizwe J. , Friedrich Holger B. , Shozi Mzamo L. 
Published: July 2019

Abstract
C12H9BrN2, monoclinic, P21/c (no. 14), a = 19.2197(12) Å, b = 4.8579(3) Å, c = 11.4679(9) Å, β = 106.880(4)°, V = 1024.60(12) Å3, Z = 4, R
gt(F) = 0.0449, wR
ref(F
2) = 0.1257, T = 100(2) K.
Nonlinear H-infinity control for switched reluctance machines
Authors: Rigatos Gerasimos , Siano Pierluigi , Ademi Sul 
Published: July 2019

AbstractThe article proposes a nonlinear H-infinity control method for switched reluctance machines. The dynamic model of the switched reluctance machine undergoes approximate linearization round local operating points which are redefined at each iteration of the control algorithm. These temporary equilibria consist of the last value of the reluctance machine’s state vector and of the last value of the control signal that was exerted on it. For the approximate linearization of the reluctance machine’s dynamics, Taylor series expansion is performed through the computation of the associated Jacobian matrices. The modelling errors are compensated by the robustness of the control algorithm. Next, for the linearized equivalent model of the reluctance machine an H-infinity feedback controller is designed. This requires the solution of an algebraic Riccati equation at each time-step of the control method. It is shown that the control scheme achieves H-infinity tracking performance, which implies maximum robustness to modelling errors and external perturbations. The stability of the control loop is proven through Lyapunov analysis.