bluuebunny/crossref_metadata_2025_split huggingface dataset:
Inflexible Repositioning: Commitment in Competition and Uncertainty
Authors: Cong Jiajia , Zhou Wen 
Published: August 2019

We study the value of commitment in a business environment that is both competitive and uncertain, in which two firms face stochastic demands and compete in positioning and repositioning. If the future demand tends to disperse or the demand uncertainty is sufficiently large, one firm chooses rigidity (i.e., commits not to change its positions), and the other chooses flexibility (i.e., to reposition freely). We find that a firm’s rigidity can benefit not only itself, but also its flexible rival. When uncertainty is larger, rigidity becomes more valuable relative to flexibility. These results arise because the asymmetric equilibrium generates two collective gains in addition to the usual individual gain (in terms of competitive advantages) accrued to the committing firm. A firm’s rigid repositioning can soften competition and generate a commitment value, and the other firm’s flexible repositioning generates an option value. Both values then spill over to competitors within the ecosystem. These results suggest that, when firms compete under uncertainty, commitment and options are valuable not only for the party that is making the choice, but also for all competing parties collectively. Commitment value and option value do not have to be mutually exclusive; they can coexist and even strengthen each other through unilateral commitment, which achieves the best of both strategies. This paper was accepted by Juanjuan Zhang, marketing.
A participação das mulheres na produção acadêmica da área de Relações Internacionais no Brasil | The participation of women in academic production in the field of International Relations in Brazil
Authors: Coelho Farias de Souza André Luiz , Elias Ivi Vasconcelos , Santos Vinicius Silva 
Published: August 2019

Neste artigo, buscamos mapear a produção acadêmica na área de Relações Internacionais no Brasil observando a participação das mulheres partindo das características da produção acadêmica em relação ao gênero e às divisões temáticas do campo. Para tanto, analisamos os dois principais periódicos da área segundo a classificação da Capes: Contexto Internacional e a Revista Brasileira de Política Internacional (RBPI). O artigo está dividido em três partes. Na primeira, situamos a discussão sobre mulheres na ciência em relação ao gênero como categoria crítica de análise. Em seguida, promovemos o debate sobre a literatura que discute o mapeamento da produção acadêmica, considerando a produção científica de mulheres em geral e na área de Relações Internacionais. Finalmente, apresentamos os resultados situando a produção acadêmica feminina. Como conclusão, constatamos que a distância do número de artigos publicados por mulheres e homens não se alterou ao longo do tempo, mantendo a estrutura de desigualdade.Palavras-chave: Gênero; Relações Internacionais no Brasil; Produção Acadêmica. ABSTRACTIn this article, we seek to map the academic work in the field of International Relations in Brazil, according to women’s share focusing on the characteristics of the academic work in relation to gender and thematic divisions in the field. We analyzed all the articles published by two of the most prestigious journals in Brazil: Contexto Internacional e Revista Brasileira de Política Internacional (RBPI). The article has three sections: the first presents the discussion about women in science and brings gender as a critical analytical category. In the following section, we carry out a debate about the literature which deals with the mapping of academic production considering the scientific production. Finally, we present the results placing the female academic production. In the end, our findings show that the gap between the number of articles published by men and women did not change over time maintaining the structure of inequality.Keywords: Gender; International Relations in Brazil; Academic Production.Recebido em: 19 set.2018 | Aceito em: 31 mai.2019
Pelvic Gastrointestinal Stromal Tumor With Pulmonary Metastasis
Authors: Akolkar Shalaka , Melitas Constantine , Piper Marc 
Published: August 2019

ABSTRACT
Extragastrointestinal stromal tumors (EGISTs) comprise a small portion of gastrointestinal stromal tumors. Metastasis normally occurs to nearby organs. However, metastasis to the lungs is uncommon in EGISTs. Furthermore, recurrence of the EGIST in a new location years later has not been documented. We present this case to highlight this behavior of EGISTs in hopes to better understand this rare type of neoplasm.
Azure Machine Learning tools efficiency in the electroencephalographic signal P300 standard and target responses classification
Authors: Wójcik Grzegorz M. , Kawiak Andrzej , Kwasniewicz Lukasz , Schneider Piotr , Masiak Jolanta 
Published: August 2019

Abstract
The Event-Related Potentials were investigated on a group of 70 participants using the dense array electroencephalographic amplifier with photogrammetry geodesic station. The source localisation was computed for each participant. The activity of brodmann areas (BAs) involved in the brain cortical activity of each participant was measured. Then the mean electric charge flowing through particular areas was calculated. The five different machine learning tools (logistic regression, boosted decision tree, Bayes point machine, classic neural network and averaged perceptron classifier) from the Azure ecosystem were trained, and their accuracy was tested in the task of distinguishing standard and target responses in the experiment. The efficiency of each tool was compared, and it was found out that the best tool was logistic regression and the boosted decision tree in our task. Such an approach can be useful in eliminating somatosensory responses in experimental psychology or even in establishing new communication protocols with mildly mentally disabled subjects.
Epileptic seizure detection on EEG signals using machine learning techniques and advanced preprocessing methods
Authors: Mahjoub Chahira , Le Bouquin Jeannès Régine , Lajnef Tarek , Kachouri Abdennaceur 
Published: August 2019

Abstract
Electroencephalography (EEG) is a common tool used for the detection of epileptic seizures. However, the visual analysis of long-term EEG recordings is characterized by its subjectivity, time-consuming procedure and its erroneous detection. Various epileptic seizure detection algorithms have been proposed to deal with such issues. In this study, a novel automatic seizure-detection approach is proposed. Three different strategies are suggested to the user whereby he/she could choose the appropriate one for a given classification problem. Indeed, the feature extraction step, including both linear and nonlinear measures, is performed either directly from the EEG signals, or from the derived sub-bands of tunable-Q wavelet transform (TQWT), or even from the intrinsic mode functions (IMFs) of multivariate empirical mode decomposition (MEMD). The classification procedure is executed using a support vector machine (SVM). The performance of the proposed method is evaluated through a publicly available database from which six binary classification cases are formulated to discriminate between healthy, seizure and non-seizure EEG signals. Our results show high performance in terms of accuracy (ACC), sensitivity (SEN) and specificity (SPE) compared to the state-of-the-art approaches. Thus, the proposed approach for automatic seizure detection can be considered as a valuable alternative to existing methods, able to alleviate the overload of visual analysis and accelerate the seizure detection.
A Compact Third-Order Triplexer Using Common Lumped-Element Triple-Mode Resonator
Authors: Xu Jin , Wan Hao , Ding Jiang-Qiao , Zhu Yin-Xia 
Published: August 2019

Abstract
A compact third-order triplexer using a common lumped-element triple-mode resonator (LE-TMR) and LC resonators is presented in this paper. Every channel of proposed third-order triplexer has three resonant modes, i. e. one resonant mode from the common LE-TMR and another two resonant modes from two LC resonators. Step-to-step design procedure is given to guide the third-order triplexer design. As an example, a 0.9/1.8/3.5 GHz third-order triplexer with ripple bandwidths of 150/210/290 MHz is designed, fabricated and measured. The fabricated third-order triplexer has a compact circuit size of 0.163λg × 0.104λg, and high electrical performance can be also acquired.
Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators
Authors: Khani Shiva , Danaie Mohammad , Rezaei Pejman , Shahzadi Ali 
Published: August 2019

AbstractIn this paper, a microstrip dual-band bandpass filter (DBBPF) based on an octagonal loop resonator (OLR), tapered resonators and open bended stubs (OBSs) is designed and analysed. The proposed structure produces two passbands with the centre frequencies of 3.65 and 5.67 GHz. The marked advantages of the proposed filter are as follows: Two centre frequencies can be individually tuned. The bandwidth of the upper passband can also be controlled. Furthermore, the DBBPF benefits from an ultra-wide upper stopband from 5.9 up to 21 GHz with an attenuation level of higher than 20 dB and a small size of 0.21 λg × 0.26 λg, where λgis the guided wavelength at 3.65 GHz. The designed filter is horizontally and vertically symmetrical leading to a reciprocal S matrix. Other remarkable specifications of the proposed filter are the insertion loss < 0.62 dB, the return loss > 20.2 dB and sharp response. To provide an analytical description, the LC equivalent circuits of initial and main resonators are presented. Acceptable similarity between simulated and measured results verifies the design process.
Drospirenone-containing oral contraceptives do not affect glucose regulation and circulating corticosterone
Authors: Adeyanju Oluwaseun A. , Olatunji Lawrence A. 
Published: August 2019

Abstract

Background
Combined oral contraceptive (COC) use has been associated with an increased risk of insulin resistance (IR) and other adverse cardiovascular events, despite efforts to reduce the dosage and/or progestin type. COC containing drospirenone (DRSP) is an analog of spironolactone, hence its antimineralocorticoid and antiandrogenic characteristics have been deemed beneficial, although the benefits and/or negative outcome of its usage have not been fully elucidated. We therefore hypothesized that COC with DRSP component will not affect glucose regulation and circulating corticosterone.

Method
Ten-week-old female Wistar rats were divided into three groups: control (CON), ethinylestradiol/drospirenone COC (EE/DRSP)-treated, and ethinylestradiol/levonorgestrel COC (EE/LN)-treated rats. The treatment lasted for 8 weeks.

Results
Results showed that with the exception of lipid profiles, EE/LN but not EE/DRSP COC treatment affected body weight, glucose tolerance, plasma insulin, corticosterone, (IR), and pancreatic β-cell dysfunction.

Conclusion
Taken together, the findings showed that the beneficial effect of EE/DRSP could possibly be through the DRSP component. The result also implies that COCs containing DRSP may be a better and safer means of contraception than those with LN with less cardiovascular risks.
Exploring the therapeutic potential of sodium benzoate in acetic acid-induced ulcerative colitis in rats
Authors: Walia Deepali , Kaur Gurpreet , Jaggi Amteshwar Singh , Bali Anjana 
Published: August 2019

Abstract

Background
Ulcerative colitis is a chronic mucosal inflammation of the large intestine mainly affecting the colon and rectum. The lack of effective and safe therapeutic agents led to the identification of new therapeutic agents to effectively manage the symptoms and complications of ulcerative colitis. The present study aimed to evaluate the protective effect of sodium benzoate in acetic acid-induced ulcerative colitis in rats.

Methods
Infusion of 3% acetic acid in the colon through the rectum was done to construct a rat model of ulcerative colitis. After 5 days of infusion, macroscopic, biochemical, and histopathological examinations and disease activity scoring of the colon were done to assess colonic damage.

Results
Acetic acid infusion resulted in severe inflammation in the colon assessed macroscopically and histopathologically. Moreover, it also led to increase in myeloperoxidase (MPO) and reduction in glutathione (GSH) levels. In the present study, repeated administration of sodium benzoate (400 and 800 mg/kg i.p.) and sulfasalazine (500 mg/kg orally) for 7 days, i.e. 2 days before and continued for 5 days after acetic acid infusion, significantly attenuated macroscopic damage and disease activity score as compared to disease control. Further, it also significantly reduced the levels of MPO and enhanced colonic levels of reduced GSH. However, the lower dose of sodium benzoate (200 mg/kg) did not show sufficient protective effect in acetic acid-induced ulcerative colitis. Further, sodium benzoate per se did not show any effect in normal rats.

Conclusions
The observed protective effect of sodium benzoate may be due to its antioxidant and anti-inflammatory activities in an ulcerative colitis model.
Albinism in Didelphis virginiana (Kerr, 1792): the first reported case in Mexico
Authors: Cuxim-Koyoc Alan , Escalante-Avilés Israel , Aragón-Pech Rosendo , Pinto-Escalante Doris , Reyes-Novelo Enrique , Ruiz-Piña Hugo A. 
Published: August 2019

Abstract
Atypical colorations occur in different groups of vertebrates. The loss of melanin in the skin, hair and eyes is the result of an autosomal recessive genetic entity. It causes individuals to present with a white coloration of the skin and hair, as well as red eyes, known as albino. This manuscript documents the first record in Mexico of complete albinism in a marsupial, Didelphis virginiana, captured in the Yucatan peninsula.
Morphology and electrical properties of polypropylene/polyamide 6/glass fiber composites with low carbon black loading
Authors: Zhang Xuewei , Ma Renbo , Liu Jiang , Wu Wei 
Published: August 2019

Abstract
The objective of this study is to investigate the electrically conductive properties and percolation thresholds of carbon black (CB)-filled polypropylene (PP)/glass fiber (GF), PP/polyamide 6 (PA6), and PP/PA6/GF composites. Compared to CB-filled PP/GF and PP/PA6 composites, PP/PA6/GF/CB composites exhibited a reduction of the percolation threshold. Under the same CB loading, the surface resistivity of PP/PA6/GF/CB composites was much lower, indicating a better conductivity. According to the morphology images characterized by transmission electron microscopy, CB was preferentially located in the PA6 phase due to the good interaction between CB and PA6 and the lower viscosity of PA6. The addition of GF formed a PA6-coated GF structure. This structure with a relatively long diameter can effectively assist the construction of conductive paths. Meanwhile, GF also played a volume-occupying role and improved the effective concentration of the conductive component in the system. The influences of GF and PA6 mass fraction on the surface resistivity of PP/PA6/GF/CB composites were also explored, respectively. It was found that appropriate amounts of GF and PA6 could effectively increase the electrical conductivity, providing guidance for fabricating an antistatic or conductive material with high comprehensive performance.
Data-mining approach for screening of rare genetic elements associated with predisposition of prostate cancer in South-Asian populations
Authors: Zubair Mahboob Muhammad , Hamid Arslan , Mushtaq Nada , Batool Sana , Batool Hina , Zeeshan Nadia , Ali Muhammad , Sughra Kalsoom , Ashraf Naeem Mahmood 
Published: August 2019

Abstract

Objective
Prostate cancer (PCa) is a complex heterogeneous disease and a major health risk to men throughout the world. The potential tumorigenic genetic hallmarks associated with PCa include sustaining proliferative signaling, resisting cell death, aberrant androgen receptor signaling, androgen independence, and castration resistance. Despite numerous comprehensive genome-wide association studies (GWAS), certain genetic elements associated with PCa are still unknown. This situation demands more systematic GWAS studies in different populations. This study presents a computational strategy for identification of novel and uncharacterized genetic factors associated with incidence of PCa in South Asian populations.

Materials and methods
Genome-wide association studies (GWAS) catalog and Gene Expression Omnibus (GEO) furnished PCa-related genetic studies. Database for Annotation, Visualization and Integrated Discovery (DAVID) functionally annotated these genes and wANNOVAR separated South Asian (SAS) populations – specific genetic factors at MAF threshold <0.05.

Results
The study reports 195 genes as potential contributors to prostate cancer in SAS populations. Some of identified genes are PYGO2, RALBP1, RFX5, SLC22A3, VPS53, HMCN1 and KIF1C.

Conclusion
The identified genetic elements may assist in development of population-specific screening and management strategies for PCa. Moreover, this approach may also be used to retrieve potential genetic elements associated with other types of cancers.
A nőnevelés-történet képi forrásai
Authors: Kéri Katalin 
Published: August 2019

A társadalomtudományi-bölcsészeti kutatásokban az utóbbi időszakban több más fordulat mellett a képi fordulat (visual turn; iconic turn) is végbement. A különböző képi anyagok összegyűjtése és elemzése rohamléptekkel halad előre, mára már több olyan kiváló könyv és tanulmány is rendelkezésünkre áll, amelyek segítik az ikonografikus ábrázolások, az álló és mozgóképek elemzését. A képkutatások számos esetben kifejezetten interdiszciplináris közelítést kívánnak, és megjelentek a nőnevelés-történeti vizsgálódások alapját jelentő neveléstörténeti kutatásokban éppúgy, mint a napjaink iskolai világát kutató pedagógiai feltárásokban. Az előbbi tudományterület (tágabban a történettudomány) esetében az elméleti-módszertani megalapozottság hosszabb történetre tekinthet vissza és jobban kifejtett, a tágabban vett pedagógiai, neveléstörténeti kutatásokban inkább az utóbbi években látható a fellendülés ennél az összetett, alapvetően kvalitatív kutatási módszernél.
Jelen tanulmány a szerző több évtizedes, az újkori nőtörténettel és lánynevelés-történettel kapcsolatos kutatásainak leány-középiskoláztatással összefüggő, szűkebben véve az Országos Nőképző Egyesület történetéről feltárt képek összegyűjtésével és elemzésével kapcsolatos részeredményeit közli, azaz egy nagy lélegzetű kutatás kis területének tekinthető csupán. Kezdetleges és töredékes formájában is jelzi azonban, hogy a képi források gazdag anyagából a neveléstörténet is bőven és bátran meríthet, és hogy az egyes témák árnyaltabb kifejtéséhez az ikonográfiai-ikonológiai kutatások is hozzájárulhatnak.
Fotó: Vasárnapi Újság (Erdélyi)
Reprezentáció és propaganda
Authors: Stróbl Erzsébet 
Published: August 2019

The paper explores the concept of female sovereignty by comparing the two visits of Queen Elizabeth I to the university town of Oxford: first in 1566 and the second in 1592. The analysis of the extant documents shows that the late reign of the Queen became more autocratic and tolerated less discussion on issues of authority. The receptions staged by the scholars included academic disputations that directly addressed general questions of princely power and the Church of England, such as the superiority of law over the king, or the right to dissemble about religious beliefs. Although both visits focused on theoretical issues, the themes of the second were markedly less daring. The paper also examines the rhetoric of Queen Elizabeth’s response to such challenges, and investigates the political and religious contexts of her visits in order to highlight how the Queen’s position as female monarch changed in the last decades of the sixteenth century.
Fotó: Bodleian Library, Oxford
Different Knee and Ankle Positions Affect Force and Muscle Activation During Prone Leg Curl in Trained Subjects
Authors: Marchetti Paulo H. , Magalhaes Roberto A. , Gomes Willy A. , da Silva Josinaldo J. , Stecyk Shane D. , Whiting William C. 
Published: August 2019

Abstract
Marchetti, PH, Magalhaes, RA, Gomes, WA, da Silva, JJ, Stecyk, SD, and Whiting, WC. Different knee and ankle positions affect force and muscle activation during prone leg curl in trained subjects. J Strength Cond Res 35(12): 3322–3326, 2021—Different joint positions for biarticular muscles may affect force and muscular activity during single-joint exercises. The aim of this study was to compare the maximal isometric contractions and muscle activation in 2 different knee and ankle positions during prone leg curl exercise in trained subjects. Fifteen resistance-trained men (27 ± 4 years, 178.80 ± 5.72 cm, 86.87 ± 12.51 kg) were recruited. The peak force (PF) and muscle activation of biceps femoris, gastrocnemius lateralis (GL), and soleus lateralis (SL) were measured during knee flexion at 0 and 90° and maximal dorsiflexion (D) or plantarflexion (P). Three maximal voluntary isometric contractions of 5 seconds were performed for each combination of knee and ankle positions. Two-way repeated-measures analysis of variances were used for all dependent variables. For PF, there was a significant difference between ankle positions (D × P) at 90° (p = 0.009) and knee positions (0 × 90°) for D (p < 0.001) and P (p < 0.001). Peak force was greater with the knee at 0° and the ankle maximally dorsiflexed. For GL, there was a significant difference between ankle (D × P) at 0° (p = 0.002) and knee positions (0 × 90°) for D (p = 0.005). Gastrocnemius lateralis activation was greater with the knee at 90° of flexion and the ankle maximally dorsiflexed. For SL, there was a significant difference between ankle positions (D × P): at 90° (p = 0.001) and at 0° (p = 0.002). Soleus lateralis is more active in plantarflexion irrespective of the knee joint position. Isometric contractions with full knee extension produce more strength regardless of the ankle position; neither the knee position nor the ankle position may influence the activity of the hamstrings.
Relationship Among Biological Maturation, Physical Characteristics, and Motor Abilities in Youth Elite Soccer Players
Authors: Itoh Ryosuke , Hirose Norikazu 
Published: August 2019

AbstractItoh, R and Hirose, N. Relationship among biological maturation, physical characteristics, and motor abilities in youth elite soccer players.J Strength Cond Res34(2): 382–388, 2020—Studies investigating skeletal maturity and motor abilities in youth Asian elite soccer players are lacking. We aimed to investigate the cross-sectional relationship among skeletal age (SA), physical characteristics, and motor abilities in youth elite soccer players. Skeletal age is commonly used to estimate the maturity status of youth athletes using a hand-wrist radiograph. We enrolled 49 youth elite male soccer players (12.7 ± 0.2 years). Height, body mass, body fat percentage, circumference (thigh/calf), flexibility, 10-m/50-m sprint, 10-m × 5 shuttle run, the crank test, 5-step bounding, Yo-Yo intermittent recovery test level 2, and cooper run were measured. Participants were divided into early (n= 14), average (n= 22), and late (n= 13) maturation groups according to their chronological age (CA) and SA based on the following criteria: SA-CA < −1 year, SA-CA = ±1 year, and SA-CA > +1 year, respectively. The difference in parameters among the groups was analyzed using one-way analysis of variance and Tukey's post hoc test. Statistical significance was set atp< 0.05. The early and average maturation groups were taller and heavier and had a larger circumference than the late maturation group (p< 0.05). Conversely, the early and average groups were significantly faster in 50-m sprint (p< 0.05) and scored higher in 5-step bounding (p< 0.05) than the late group. There was no difference in other parameters among the groups. In conclusion, the difference in biological maturity influences physical and physiological development, particularly height and muscular power, in youth elite soccer players.