bluuebunny/crossref_metadata_2025 huggingface dataset:
Reinforcement Learning for Security-Aware Workflow Application Scheduling in Mobile Edge Computing
Authors: Huang Binbin , Xiang Yuanyuan , Yu Dongjin , Wang Jiaojiao , Li Zhongjin , Wang Shangguang
Published: May 2021

Mobile edge computing as a novel computing paradigm brings remote cloud resource to the edge servers nearby mobile users. Within one-hop communication range of mobile users, a number of edge servers equipped with enormous computation and storage resources are deployed. Mobile users can offload their partial or all computation tasks of a workflow application to the edge servers, thereby significantly reducing the completion time of the workflow application. However, due to the open nature of mobile edge computing environment, these tasks, offloaded to the edge servers, are susceptible to be intentionally overheard or tampered by malicious attackers. In addition, the edge computing environment is dynamical and time-variant, which results in the fact that the existing quasistatic workflow application scheduling scheme cannot be applied to the workflow scheduling problem in dynamical mobile edge computing with malicious attacks. To address these two problems, this paper formulates the workflow scheduling problem with risk probability constraint in the dynamic edge computing environment with malicious attacks to be a Markov Decision Process (MDP). To solve this problem, this paper designs a reinforcement learning-based security-aware workflow scheduling (SAWS) scheme. To demonstrate the effectiveness of our proposed SAWS scheme, this paper compares SAWS with MSAWS, AWM, Greedy, and HEFT baseline algorithms in terms of different performance parameters including risk probability, security service, and risk coefficient. The extensive experiments results show that, compared with the four baseline algorithms in workflows of different scales, the SAWS strategy can achieve better execution efficiency while satisfying the risk probability constraints.
Data Hiding Based on Mini Program Code
Authors: Chen Jia , Qi Quankai , Wang Yongjie , Yan Xuehu , Li Longlong
Published: May 2021

A mini program code (also known as sunflower code) comes with WeChat mini program APPs. With the popularization of mini program APPs, mini program codes have become more and more widely used. As a new carrier, the study of information hiding technology based on mini program code is of great significance for the expansion of covert communication carriers and can also deal with security problems in advance. At present, to the best of our knowledge, there is no steganographic research based on mini program codes. In this paper, we propose a scheme to embed secret information into mini program codes for the first time. After studying the construction of mini program codes, a coordinate system is constructed to represent its module coordinates. Then, a binary stream of the secret message is embedded into the encoding region or the edge patch. Experiments show that the proposed data hiding scheme is effective and feasible. The embedded secret message could be extracted while keeping the readability of the mini program code. Moreover, the secret payloads of the encoding region and the edge patch for the V-36 mini program code are 72 bits and 29 bits, respectively.
The Central Roles of Noncoding RNA in Estrogen-Dependent Female Reproductive System Tumors
Authors: Tu Jiajie , Yang Huan , Jiang Lei , Chen Yu , Yu Chen  , Li Zhe , Li Lei , Zhang Yuanyuan , Chen Xiaochun , Chen He , Yu Zhiying
Published: May 2021

The pathogenesis of ovarian and endometrial cancers is closely associated with estrogen-related pathways. These estrogen-dependent tumors seriously threaten the health and quality of life in women. Noncoding RNAs (ncRNAs) are defined as RNAs that do not encode proteins, including microRNAs (miRNAs) and long noncoding RNAs (lncRNAs), both of which have been reported in estrogen-dependent female reproductive system tumors. This review systematically summarizes the role of ncRNAs in estrogen-dependent tumors and common patterns of regulatory mechanisms to explore their future research directions in tumor diagnosis, treatment, and prognosis. This may provide new ideas for the potential application of ncRNAs in estrogen-dependent female reproductive system tumors.
Acquired Acrodermatitis Enteropathica in a 28-Year-Old Male with Type 1 Diabetes
Authors: Ngalamika Owen , Selvaraj Wencilaus M. P. , Yikona Fatima K. , Mumba Chibamba
Published: May 2021

Acrodermatitis enteropathica (AE) is a rare disorder arising from inherited or acquired zinc deficiency. It is mainly characterized by acral dermatitis, periorificial dermatitis, alopecia, and gastrointestinal symptoms in the form of diarrhea. There are many complications of AE including local and systemic infections that may develop as a result of untreated AE. In addition, due to the role of zinc in glucose metabolism, chronic zinc deficiency may pose a challenge in the control of blood glucose levels in diabetics. We report the case of a 28-year-old male with type 1 diabetes who presented with signs and symptoms of AE.
A New Algorithm for Sketch‐Based Fashion Image Retrieval Based on Cross‐Domain Transformation
Authors: Lei Haopeng , Chen Simin , Wang Mingwen , He Xiangjian , Jia Wenjing , Li Sibo
Published: May 2021

Due to the rise of e‐commerce platforms, online shopping has become a trend. However, the current mainstream retrieval methods are still limited to using text or exemplar images as input. For huge commodity databases, it remains a long‐standing unsolved problem for users to find the interested products quickly. Different from the traditional text‐based and exemplar‐based image retrieval techniques, sketch‐based image retrieval (SBIR) provides a more intuitive and natural way for users to specify their search need. Due to the large cross‐domain discrepancy between the free‐hand sketch and fashion images, retrieving fashion images by sketches is a significantly challenging task. In this work, we propose a new algorithm for sketch‐based fashion image retrieval based on cross‐domain transformation. In our approach, the sketch and photo are first transformed into the same domain. Then, the sketch domain similarity and the photo domain similarity are calculated, respectively, and fused to improve the retrieval accuracy of fashion images. Moreover, the existing fashion image datasets mostly contain photos only and rarely contain the sketch‐photo pairs. Thus, we contribute a fine‐grained sketch‐based fashion image retrieval dataset, which includes 36,074 sketch‐photo pairs. Specifically, when retrieving on our Fashion Image dataset, the accuracy of our model ranks the correct match at the top‐1 which is 96.6%, 92.1%, 91.0%, and 90.5% for clothes, pants, skirts, and shoes, respectively. Extensive experiments conducted on our dataset and two fine‐grained instance‐level datasets, i.e., QMUL‐shoes and QMUL‐chairs, show that our model has achieved a better performance than other existing methods.
Knowledge, Attitude, and Practice of Nurses Working in the Adult Intensive-Care Unit and Associated Factors towards the Use of Physical Restraint in Federally Administered Hospitals in Addis Ababa, Ethiopia: A Multicenter Cross-Sectional Study
Authors: Woldekirkos Lielt Mersha , Jiru Tilahun , Hussien Heyria , Shetie Belayneh
Published: May 2021

Background. Physical restraint is any chemical or physical involuntary method restricting an individual’s movement, physical activity, or normal access to the body. Physical restraints are prescribed by the physician, but the ICU nurse remains the decision maker responsible in assessing the need, application, and removal of PR on patients in the ICU setting. Objectives. This cross-sectional descriptive study was carried out to determine the knowledge, attitudes, and practices of nurses working in adult ICU and associated factors towards the use of physical restraints in federally administered hospitals in Addis Ababa, Ethiopia, 2019. Methods. The study was conducted in ICUs of Federal Hospitals in Addis Ababa, Ethiopia, 2019. A hospital-based descriptive cross-sectional study design was carried out. By census, a total of 126 nurses were included. The data were checked for their completeness and were entered to EpiData version 4.2 and analyzed using SPSS version 25 software with 95% CI. Also, the Pearson correlation coefficient and binary logistic regression analysis were used to find an association. Result. Majority of nurses was found to be aged between 21 and 30 years, (62.5%) have worked 2–5 years, and (83%) were degree graduates. The nurses’ knowledge score was 6.1 ± 2.6 (50.8%) with possible range 0–11, the attitude score was 14.1 ± 3.1 (64%) with possible range 0–22, and the practice score was 13.9 ± 3.8 (63.18%) with possible range 0–22. Their demographical characteristics such as gender, working year, and education levels were not significantly associated with knowledge, attitudes, and practices (

P

 > 0.05). Only age significantly associated with practice. Lack of a written policy or guideline and not being trained on application of physical restraint were significantly associated with knowledge. Also, practice was associated with knowledge and attitude. Conclusion. According to the study, there was a poor level of nurses’ knowledge, proper attitude, and satisfactory practice toward the use of physical restraints.
Weighted Polynomial-Based Secret Image Sharing Scheme with Lossless Recovery
Authors: Wang Yongjie , Chen Jia , Gong Qinghong , Yan Xuehu , Sun Yuyuan
Published: May 2021

In some particular scenes, the shadows need to be given different weights to represent the participants’ status or importance. And during the reconstruction, participants with different weights obtain various quality reconstructed images. However, the existing schemes based on visual secret sharing (VSS) and the Chinese remainder theorem (CRT) have some disadvantages. In this paper, we propose a weighted polynomial-based SIS scheme in the field of GF (257). We use

k
,
k

threshold polynomial-based secret image sharing (SIS) to generate

k

shares and assign them corresponding weights. Then, the remaining

n
−
k

shares are randomly filled with invalid value 0 or 255. When the threshold is satisfied, the number and weight of share can affect the reconstructed image’s quality. Our proposed scheme has the property of lossless recovery. And the average light transmission of shares in our scheme is identical. Experiments and theoretical analysis show that the proposed scheme is practical and feasible. Besides, the quality of the reconstructed image is consistent with the theoretical derivation.
Short-Term Traffic Flow Prediction with Recurrent Mixture Density Network
Authors: Chen Mingjian , Chen Rui , Cai Fu , Li Wanli , Guo Naikun , Li Guangyun
Published: May 2021

Traffic situation awareness is the key factor for intelligent transportation systems (ITS) and smart city. Short-term traffic flow prediction is one of the challenging tasks of traffic situation awareness, which is useful for route planning, traffic congestion alleviation, emission reduction, and so on. Over the past few years, ubiquitous location acquisition techniques and sensors digitized the road networks and generated spatiotemporal data. Massive traffic data provide an opportunity for short-term traffic flow prediction in a data-driven manner. Most of the existing short-term traffic flow prediction methods can be divided into two categories: nonparametric and parametric. Traditional parametric methods failed to obtain accurate prediction, due to the nonlinear and stochastic characteristics of short-term traffic flow. Recently, deep learning methods have been studied widely in the fields of short-term prediction. These nonparametric methods yielded promising results in practical experiments. Motivated by the current study status, we dedicate this paper to a short-term traffic flow prediction approach based on the recurrent mixture density network, the combination of recurrent neural network (RNN), and mixture density network (MDN). This approach is implemented on real-world traffic flow data and demonstrates the prominent superiority. To the best of our knowledge, this is the first time that the recurrent mixture density network is applied to a real-world short-term traffic flow prediction task.
The USGT Method for Suspender Tensioning of Self‐Anchored Suspension Bridges
Authors: Tan Hongmei , Hou Zhujian , Qiu Zhou , Ji Junlin , Chen Dahan
Published: May 2021

Unlike earth‐anchored suspension bridges, self‐anchored suspension bridges (SASBs) involve a special construction stage, namely, suspender tensioning, in which the tensioning force and sequence are crucial and complicated. Against this background, an example bridge A, a SASB with a steel‐concrete composite beam, is introduced in detail. Using MIDAS finite element software, a suspender tensioning scheme is formulated based on a combination method of the unstrained state method and graded tension method (the USGT method), in which a suspender is tensioned according to its unstrained length. By analyzing the bending moment change of the beam and deflection of the main cable throughout the entire construction process, a “high‐to‐low” suspender tensioning sequence is proposed that also involves symmetrical tensioning from the main towers to the midspan or the anchor positions. In the optimized construction process, the deviation and stress of the main towers are controlled well, thereby ensuring the safety of the main beam and main towers in the construction process.
A Study of Safety Coefficient Determination and Support Parameter Optimization Based on Vulnerability Preevaluation
Authors: Zhang Minglei , Gao Linsheng , Yang Yue , Zhang Yidong , Ji Ming
Published: May 2021

The preevaluation to the vulnerability of the surrounding rocks is proposed as one of the reliable indicators of the safety coefficient of gateway support and a foundation to optimize the support design parameters. In this study, taking the surrounding rocks, stress, geological environment, and service time into consideration, the safety coefficient is determined based on the vulnerability scores calculated by the vulnerability preevaluation model of the surrounding rock. Applying the safety coefficient to the instability evaluation of the composite rock‐bolt bearing structure, the strength required to maintain the stability of the gateway is calculated, which further provides references and guidance to the optimization of the anchor support parameters. This method has been successfully adopted by the GuCheng coal mining project in N1303 tailgate to strengthen the anchor‐bolt structure in the roof watering area especially the main inclined shaft. Applying more accurately calculated strength to the anchor‐bolt structure can effectively avoid the issue of overcompensation, thus reducing the cost and increasing the driving speed. Furthermore, this method provides insights into optimizing design parameters of the gateway. This method provides a reliable basis for the optimization design of bolt support parameters in coal mine gateway.
A Small‐Area, Low‐Power Delta‐Sigma DAC Applied to a Power‐Specific Chip
Authors: Li Peng , Xi Wei , Zeng Xiangjun , Li Xiaobo , Zheng Dandan
Published: May 2021

This paper introduces a small‐area, low‐power delta‐sigma DAC that can support power line carrier communication. In order to achieve the oversampling ratio of 128, a three‐stage cascaded half‐band filter is utilized. An optimized sturdy MASH ΔΣ modulator was used to avoid instability caused by high‐order shaping and reduce the area at the same time. The postanalog reconstruction includes a switched‐capacitor DAC (SC DAC) and a 4‐tap FIR/IIR hybrid filter, which not only meets the requirements of low power but also promotes the out‐of‐band SNR. The final chip is fabricated in a 55 nm CMOS process, occupies 0.08 mm2, and consumes 1.5 mW of analog power at 2.5 V supply. The simulation results show that the dynamic range is 85.7 dB, while the out‐of‐band SNR is 40.5 dB.
Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes
Authors: Alkhalifeh Khaldoun , Rmili Hatem , Hakim Bandar , Sobahi Nebras , AL-Turki Youssef
Published: May 2021

The oil and gas industry requires accurate sensors to control fluid flow in pipelines during the production process from horizontal and near horizontal wells. The extracted crude oil is usually a multiphase mixture of oil, water, and gas, and the accurate measurement of the ratio of each multiphase within the pipeline is an important parameter to manage wells efficiently by maximizing the hydrocarbons that can be extracted. Various methods have been developed for determining the phase ratio including mechanical, optical, X-ray or gamma ray, ultrasound, nuclear magnetic resonance (NMR), and rarely microwave techniques. However, these methods do not permit the knowledge of the real-time evolution of the phase ratio and are less precise. Here, we propose and develop by simulation two microwave systems, in horizontal and vertical polarizations, to choose the optimal configuration for crude pipeline imaging applications. First, the pipeline containing crude oil was modeled and its thermal and dielectric properties are proposed. Then, the antennas array performances were optimized and assembled to the pipeline. Different numbers of antenna elements were successfully investigated using CST simulation in both vertical and horizontal polarizations to find the optimal number of antenna elements for the pipeline applications.
The Neutrophil-to-Monocyte Ratio and Platelet-to-White Blood Cell Ratio Represent Novel Prognostic Markers in Patients with Pancreatic Cancer
Authors: Tang Feng , Dai Penghui , Wei Qiongqiong , Gan Ke , Wang Zijie , Chen Huan , Li Ting , Lv Muhan , Deng Mingming , Luo Gang
Published: May 2021

Background. Inflammation plays an important role in the development of tumors. Several serum based-markers and ratios have been investigated for their prognostic value in pancreatic cancer. However, the prognostic value of the neutrophil-to-monocyte ratio (NMR) and platelet-to-white blood cell ratio (PWR) for patients with pancreatic cancer has scarcely been investigated. Methods. From October 2013 to November 2018, a retrospective cohort study was performed on 269 pancreatic cancer patients without treatment. Receiver operating characteristic curves were generated, and areas under the curve were compared for the evaluation of the discriminatory ability of inflammation-based prognostic scoring systems. Kaplan-Meier curves and the Cox proportional hazard model were employed to analyze the relationships among NMR, PWR, and overall survival (OS). Results. The optimal cutoff values of NMR and PWR were 48 and 6, respectively. In univariate analysis, the survival time of

NMR
>
48

and

PWR
≤
6

was shorter than that of

NMR
≤
48

and

PWR
>
6

in patients with pancreatic cancer (

P
<
0.001

). In Cox univariate and multivariate analyses, NMR (hazard ratio (HR), 9.095; 95% confidence interval (CI), 3.64–22.72;

P
<
0.001

) and PWR (HR, 8.230; 95% CI, 3.32–20.43;

P
<
0.001

) were significantly correlated with OS. Conclusions. The current study demonstrated that NMR and PWR may serve as novel and promising inflammatory prognostic scores for patients with pancreatic cancer. Elevated NMR (>48) and depressed PWR (<6) were independently associated with poor prognosis in patients with pancreatic cancer.
Influence of Corrosion and Fatigue on the Bending Performances of Damaged Concrete Beams
Authors: He Shiqin , Cao Zeyang , Ma Jiajun , Zeng Shuai , Li Pengfei , Wang Hui
Published: May 2021

The durability of in‐service reinforced concrete bridges will be greatly reduced under the action of corrosion and the repeated load such as vehicles. In this paper, six reinforced concrete beams were cast and subjected to sustained load test for one year, and then, the alternating test of corrosion and fatigue load were carried out with the damaged concrete beams. The long‐term deflection, fatigue lifetime, failure modes, and crack growth were investigated under different corrosion and fatigue working conditions. The fracture section of steel bars was scanned by electron microscopy at the end of fatigue test. The results indicate that the deflection of the beams will continue to increase under a long‐term load. The chloride salt in the beam has little influence on the deflection performance, but will shorten the fatigue lifetime due to the corrosion of the steel bars. Moreover, the corrosion environment can accelerate the rusting of the beam bar and reduce the fatigue lifetime, the accumulation of deflection damage and crack damage, and other fatigue characteristics. The crack initiation‐propagation‐fracture stage of steel bars occurs in the process of fatigue.
Advances in Understanding the Alkali‐Activated Metallurgical Slag
Authors: Liu Kuisheng , Zhang Zengqi , Sun Jianwei
Published: May 2021

This paper summarized and reviewed the mechanism and macro‐performance of alkali‐activated metallurgical slag, including steel slag, copper slag, ferronickel slag, and lead‐zinc slag. Better activated method and alkali‐activator are still needed to be developed to improve the performance of the metallurgical slag with low reactivity. Besides, the chemical components’ variation of these metallurgical slags from different regions will lead to unpredictable performance, which needs further study.
Airborne Laser Communication System with Automated Tracking
Authors: Ke Xizheng , Liang Hanli
Published: May 2021

The acquisition, alignment, and tracking system is an important part of airborne laser communication and is the prerequisite and guarantee for the normal communication link. In order to solve the problem of automatic tracking of laser communication links in the airborne environment, the rapid capture, alignment, and tracking of beams between terminals are realized. This article proposes a stepping motor as a control servo system and a four-quadrant detector as an automatic tracking method for the detection unit. The pulse width modulation signal controls the rotation speed of the stepping motor and combines the position distribution of the light spot on the four-quadrant detector to achieve high-precision beam tracking. On this basis, indoor simulation experiments are carried out. After many experiments, the tracking accuracy is better than 2.5 μrad, which shows that the system can be applied to airborne laser communication, and it is verified that this method has good automatic tracking performance for airborne laser communication.
Investigation of Extended k-Hypergeometric Functions and Associated Fractional Integrals
Authors: Abdalla Mohamed , Hidan Muajebah , Boulaaras Salah Mahmoud , Cherif Bahri-Belkacem
Published: May 2021

Hypergeometric functions have many applications in various areas of mathematical analysis, probability theory, physics, and engineering. Very recently, Hidan et al. (Math. Probl. Eng., ID 5535962, 2021) introduced the (p, k)-extended hypergeometric functions and their various applications. In this line of research, we present an expansion of the k-Gauss hypergeometric functions and investigate its several properties, including, its convergence properties, derivative formulas, integral representations, contiguous function relations, differential equations, and fractional integral operators. Furthermore, the current results contain several of the familiar special functions as particular cases, and this extension may enrich the theory of special functions.
General Traveling Wave Solutions of Nonlinear Conformable Fractional Sharma-Tasso-Olever Equations and Discussing the Effects of the Fractional Derivatives
Authors: Fan Kai , Wang Rui , Zhou Cunlong
Published: May 2021

The exact traveling wave solution of the fractional Sharma-Tasso-Olever equation can be obtained by using the function expansion method, but the general traveling wave solution cannot be obtained. After transforming it into the Sharma-Tasso-Olever equation of the integer order by the fractional complex transformation, the general solution of its traveling wave is obtained by a specific function transformation. Through parameter setting, the solution of the kinked solitary wave is found from the general solution of the traveling wave, and it is found that when the two fractional derivatives become smaller synchronically, the waveform becomes more smooth, but the position is basically unchanged. The reason for this phenomenon is that the kink solitary wave reaches equilibrium in the counterclockwise and clockwise rotation, and the stretching phenomenon is accompanied in the process of reaching equilibrium. This is a further development of our previous work, and this kind of detailed causative analysis is rare in previous papers.
Single-Cell Characterization of the Immune Microenvironment of Melanoma Brain and Leptomeningeal Metastases
Authors: Smalley Inna , Chen Zhihua , Phadke Manali , Li Jiannong , Yu Xiaoqing , Wyatt Clayton , Evernden Brittany , Messina Jane L. , Sarnaik Amod , Sondak Vernon K. , Zhang Chaomei , Law Vincent , Tran Nam , Etame Arnold , Macaulay Robert J.B. , Eroglu Zeynep , Forsyth Peter A. , Rodriguez Paulo C. , Chen Y. Ann , Smalley Keiran S.M.
Published: May 2021

Purpose:

Melanoma brain metastases (MBM) and leptomeningeal melanoma metastases (LMM) are two different manifestations of melanoma CNS metastasis. Here, we used single-cell RNA sequencing (scRNA-seq) to define the immune landscape of MBM, LMM, and melanoma skin metastases.

Experimental Design:

scRNA-seq was undertaken on 43 patient specimens, including 8 skin metastases, 14 MBM, and 19 serial LMM specimens. Detailed cell type curation was performed, the immune landscapes were mapped, and key results were validated by IHC and flow cytometry. Association analyses were undertaken to identify immune cell subsets correlated with overall survival.

Results:

The LMM microenvironment was characterized by an immune-suppressed T-cell landscape distinct from that of brain and skin metastases. An LMM patient with long-term survival demonstrated an immune repertoire distinct from that of poor survivors and more similar to normal cerebrospinal fluid (CSF). Upon response to PD-1 therapy, this extreme responder showed increased levels of T cells and dendritic cells in their CSF, whereas poor survivors showed little improvement in their T-cell responses. In MBM patients, therapy led to increased immune infiltrate, with similar T-cell transcriptional diversity noted between skin metastases and MBM. A correlation analysis across the entire immune landscape identified the presence of a rare population of dendritic cells (DC3) that was associated with increased overall survival and positively regulated the immune environment through modulation of activated T cells and MHC expression.

Conclusions:

Our study provides the first atlas of two distinct sites of melanoma CNS metastases and defines the immune cell landscape that underlies the biology of this devastating disease.
Hyposplenism and Gastrointestinal Diseases: Significance and Mechanisms
Authors: Mathur Abhinav , McLean Mairi H. , Cao Huan , Vickers Mark A.
Published: May 2021

Background: Functional hyposplenism is a recognized complication of several gastroenterological disorders, including coeliac and inflammatory bowel diseases, and is believed to contribute to the increased infection risk seen in these disorders. Summary: The mechanisms of hyposplenism are poorly understood. In this article, we review possible mechanisms underlying development of functional hyposplenism and discuss implications for its management. Key Messages: Identifying functional hyposplenism is important, as it may permit earlier recognition and treatment of serious infections through patient education and vaccination.
Matriciamento: uma experiência ambulatorial
Authors: Perrone Marina Bianco , Fidalgo Thiago Marques
Published: May 2021

Objetivo: compreender a construção do matriciamento em um serviço de atenção a dependentes. Método: trata-se de uma pesquisa-ação realizada nos últimos sete anos, considerando as experiências de uma terapeuta ocupacional durante suas atividades no serviço, abrangendo reuniões clínicas, supervisões, grupos de estudos e capacitações. Os materiais utilizados foram prontuários, registros de supervisão e reunião e anotações pessoais. Resultados: as demandas de cada sujeito são abordadas para além das especificidades de cada área. Os saberes são transmitidos nos encontros de equipe, permitindo, a quem está lidando diretamente com o caso, uma ampliação em sua compreensão e a experimentação de instrumentos clínicos construídos junto dos colegas. O processo de construção de trabalho com cada sujeito, matriciado constantemente entre os profissionais, permite, àquele que oferece a atenção, maior apropriação da construção clínica. Tal fenômeno também ocorre durante capacitações oferecidas pelo serviço a outras equipes de saúde. Conclusão: os espaços coletivos consideram a compreensão do sujeito por diversas perspectivas, mesmo sem contato direto com o indivíduo, a partir das narrativas de um dos profissionais e de hipóteses dos demais membros da equipe, ampliando as possibilidades de cuidado. O trabalho em projetos terapêuticos propaga-se pela instituição e em capacitações de outras equipes, permitindo a circulação...
A percepção dos trabalhadores de saúde mental sobre a atuação do redutor de danos
Authors: Leal Diego Fernandes , Silva Vanessa Alvez Mora da , Borges Luana Ribeiro , Ebling Sandra Beatris Diniz , Santos Aline Ost dos
Published: May 2021

Objetivo: conhecer a percepção dos trabalhadores sobre a atuação do redutor de danos em um Centro de Atenção Psicossocial de Álcool e outras drogas (CAPSad), assim colaborando com a problematização e transformação da realidade do cuidado aos usuários de álcool e outras drogas. Método: trata-se de uma pesquisa qualitativa e exploratória, de caráter descritivo, realizada com profissionais de um CAPSad da cidade de Sant’Ana do Livramento por meio da técnica de Grupo Focal Narrativo (GFN). Para realizar a análise dos dados, o conteúdo foi transformado em narrativa de grupo. Resultados: apontou-se a discussão frente à percepção da figura do redutor de danos e sua inter-relação no cotidiano da clínica em saúde mental, apresentando potências e desafios. Conclusão: evidencia-se a importância do papel que a redução de danos ocupa no âmbito da Reforma Psiquiátrica Brasileira. A figura do redutor de danos no serviço é de que este profissional tem como capacidade a criação de vínculos, realização de um acolhimento efetivo e que pode auxiliar na desconstrução do estigma que o usuário de substâncias sofre perante a sociedade, sendo uma ferramenta potente para a construção e transmutação na vida das pessoas.
A NEW MASDEVALLIA FROM SOUTH-WESTERN COLOMBIA (ORCHIDACEAE: PLEUROTHALLIDINAE)

Authors: GALINDO-TARAZONA ROBINSON , HAELTERMAN DAVID , MORA AGUILAR DANNY LEANDRO , ZULUAGA ALEJANDRO
Published: May 2021

A new species belonging to Masdevallia section Racemosae is described from South-Western Colombia. It is very similar to Masdevallia racemosa, the only other member of the section, with which it shares the characteristic repent habit, loose multi-flowered inflorescence, and striking red-orange flowers. However, Masdevallia mirandae can be distinguished by the adaxially hispid sepals and the elliptic petals with a rounded apex. The new species is restricted to The Farallones de Cali National Natural Park and its populations are threatened by illegal mining activities.
Advertisement call description of two Proceratophrys species (Anura: Odontophrynidae)
Authors: SICHIERI GUILHERME , CRUZ CARLOS ALBERTO GONÇALVES , PIMENTA BRUNO V.S. , NUNES IVAN
Published: May 2021

The genus Proceratophrys Miranda-Ribeiro comprises 41 species distributed in South America, especially in Brazil (Nascimento et al. 2019). Proceratophrys species have been traditionally organized into four species groups based on morphology of supraocular and postocular swellings, and presence or absence of rostral appendage (Cruz & Napoli 2010). However, these groupings are not supported by molecular data (Teixeira et al. 2012; Dias et al. 2013, Mângia et al. 2018).
Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark
Authors: DISNEY R. HENRY L , BØGGILD ESBEN
Published: May 2021

Nineteen new species, Megaselia culmenensis n. sp., M. cumrallum n. sp., M. dostrupensis n. sp., M. dravedskovensis n. sp., M. ehmsenae n. sp., M. falloclavis n. sp., M. fayesgadeensis n. sp., M. hobroensis n. sp.,M. hojerensis n. sp., M. jenshjerrildi n. sp., M. kajnisseni n. sp., M. micawberi n. sp., M. munki n. sp., M. neuter n. sp., M. onsildensis n. sp., M. romoensis n. sp., M. simestedensis n. sp., M. svendi n. sp., M. tofteensis n. sp. are described from Denmark. M. cumrallum is also reported from England. M. nigricia Disney & Durska reported from Denmark and its recognition clarified.
Book review: Ampashayya Naveen, Socialism Dreams Shattered in India: The Perspective of An Experimental Novelist
Authors: Chinnala Bala Ramulu
Published: May 2021

Ampashayya Naveen, Socialism Dreams Shattered in India: The Perspective of An Experimental Novelist. New Delhi: Authors Press, 2020, 448 pp., ₹695/$35.
The Effects of Exercise Interventions on Balance Capacity in Patients with Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis
Authors: Qin Jiawei , Zhao Kaize , Chen Yannan , Guo Shuai , You Yue , Xie Jinjin , Xu Ying , Wu Jingsong , Liu Zhizhen , Huang Jia , Chen Li dian , Tao Jing
Published: May 2021

The effect of exercise intervention on balance capacity among type 2 diabetes mellitus (T2DM) patients has not been evaluated. The objective of this systematic review and meta-analysis is to investigate the effect of exercise intervention on balance capacity among T2DM patients compared to the control group (usual care, waitlist, no-treatment, education). We conducted a comprehensive literature search through PubMed, EMBASE, Physiotherapy Evidence Database (PEDro), Cochrane library, Web of Science (WOS) from inception to August 2020. The literature language was limited to English. Randomized controlled trials (RCTs) or quasi-experimental (Q-E) trials that examined the effect of exercise intervention on balance capacity among T2DM patients were included. We used the standard methods of meta-analysis to evaluate the outcomes of exercise intervention for balance capacity of T2DM patients. A total of 14 trials (11 RCTs and 3 Q-E trials) involving 883 participants were eligible. The meta-analysis of some studies demonstrated that exercise intervention could significantly improve Berg Balance Scale (BBS) (MD = 2.56; 95%CI [0.35, 4.77]; P = .02), SLST (Single Leg Stance Test) under the eyes-open (EO) condition (MD = 3.63; 95%CI [1.79, 5.47]; P = .0001) and eyes-close (EC) condition (MD = 0.41; 95%CI [0.10, 0.72]; P = .01) compared to control group. There was no significant difference in Time Up and Go Test (TUGT) (MD = −0.75; 95%CI [−1.69, 0.19]; P = .12) and fall efficacy (SMD = −0.44; 95%CI [−0.86, −0.01]; P = .05). Narrative review of some studies indicated that exercise intervention could improve postural stability measured by Sensory Organization Test (SOT) and Center of Pressure (COP) variables, etc. This systematic review and meta-analysis summarized that exercise intervention could improve balance capacity in T2DM patients. However, further studies with high quality are required to evaluate its effect.
Epoxidized polybutadiene rubber as an effective compatibilizer for acrylonitrile butadiene rubber and polybutadiene rubber blend
Authors: Srivastava Vivek K , Basak Ganesh C , Saha Sukdeb , Rao GS Srinivasa , Jasra Raksh Vir
Published: May 2021

In the present study, epoxidized polybutadiene rubber (EBR; 30 mol% epoxidation) was synthesized using commercial-grade cis-polybutadiene rubber (BR). The EBR was successfully utilized as an effective compatibilizer between two incompatible elastomers, namely polar acrylonitrile butadiene rubber (NBR) and non-polar polybutadiene rubber (BR). The NBR and BR were blended in varied formulations and studied for morphological and mechanical properties. The observed properties of the blends containing EBR, as a compatibilizer, were compared with analogous blends without EBR. The optimum loading of EBR in NBR/BR formulations was found to be 5 phr (parts per hundred gram of rubber). The significant improvement in various mechanical properties such as tensile strength, tensile modulus, elongation at break and hardness were observed in presence of optimum loading of EBR in NBR/BR blends. Atomic Force Microscopy (AFM), Differential Scanning Calorimetry (DSC) and Dynamic Mechanical Analyser (DMA) studies revealed that the compatibility between two incompatible rubbers improved in the presence of EBR. The results observed with EBR-compatibilized blends revealed that EBR can be used as an effective compatibilizer between two incompatible rubbers (NBR and BR).
Objective Measurement of Listening Device Use and Its Relation to Hearing Acuity
Authors: Paping Danique E. , Vroegop Jantien L. , Geleijnse Geert , le Clercq Carlijn M.P. , Koenraads Simone P.C. , van der Schroeff Marc P.
Published: May 2021

Objectives

To examine whether adolescents exceed recommended noise exposure limits when using personal listening devices (PLDs) and to investigate the relationship between objectively measured PLD use and hearing thresholds

Study Design

Cross‐sectional study.

Setting

This study was embedded within an ongoing prospective birth cohort study in Rotterdam, the Netherlands. Data were collected from May 2017 to September 2019.

Methods

A smartphone application was developed to measure daily noise exposure from PLDs. Listening habits were monitored among 314 adolescents with a mean age of 13 years 7 months (SD, 5 months), of whom 51.6% were male. Hearing acuity was measured by pure tone audiometry, and tympanometry was performed in both ears.

Results

Within the study group, 2.2% adolescents exceeded the recommended daily noise dose (85 dBA as an 8‐hour time‐weighted average) among all days when the application was active and 9.9% when among only the listening days. No significant correlation was found between the daily noise dose from PLDs and pure tone thresholds.

Conclusions

The majority of adolescents exhibited listening habits that could be considered safe. As noise‐induced hearing loss develops slowly over time, it could be that the effects of PLD use on hearing are not evident yet in this young population with a relatively short duration of PLD use.
Three-Dimensional Nasolabial Changes After Nasoalveolar Molding and Primary Lip/Nose Surgery in Infants With Bilateral Cleft Lip and Palate
Authors: Mancini Laura , Avinoam Shayna , Grayson Barry H. , Flores Roberto L. , Staffenberg David A. , Shetye Pradip R.
Published: May 2021

Objective:

Utilize 3-dimensional (3D) photography to evaluate the nasolabial changes in infants with bilateral cleft lip and palate (BCLP) who underwent nasoalveolar molding (NAM) and primary reconstructive surgery.

Design:

This is a retrospective serial longitudinal study of consecutively enrolled infants from September 2012 to July 2016 with BCLP who underwent NAM before primary lip and nose reconstructive surgery. It included infants who had digital 3dMD stereophotogrammetry records at initial presentation (T1), completion of NAM (T2), and 3 weeks following primary repair (T3). Twelve infants fulfilled the inclusion criteria. 3dMD Vultus software was used to orient images and plot 16 nasolabial points with x, y, z coordinates to obtain the linear and angular measurements. Nasal form changes were measured and analyzed between T1 (0.5 months old), T2 (5 months old), and T3 (6 months old). Intraclass correlation coefficient was performed for intrarater reliability. Averaged data from the 3D images was statistically analyzed from T1 to T2 and T2 to T3 with Wilcoxon tests. Unaffected infant norms from the Farkas publication were used as a control sample.

Results:

After NAM therapy, statistically significant changes in the position of subnasale and labius superius improved nasolabial symmetry. Both retruded after NAM were displaced downward after NAM and surgical correction with respect to soft tissue nasion. The nasal tip’s projection was maintained with NAM and surgical correction. The columella lengthened from 1.4 to 4.71 mm following NAM.

Conclusions:

There was a significant improvement in the nasolabial anatomy after NAM, and this was further enhanced after primary reconstructive surgery.
Empty onset repairs in the semi-spontaneous speech of Spanish child and adult heritage speakers
Authors: Repiso-Puigdelliura Gemma
Published: May 2021

Aims:

In this study I investigate whether child and adult Spanish heritage speakers (HS) use English-like strategies to repair word-external empty onsets preceded by consonants (e.g., el.#o.so ‘the (male) bear’). That is, I examine whether HS produce glottal phonation at /C#V/ junctures. I also examine whether stress predicts the use of glottal phonation to repair word-external empty onsets.

Design:

Semi-spontaneous speech was elicited from a group of child HS (10 females (F), six males (M), mean age = 9.44 years, standard deviation ( SD) = 0.69), adult HS (13 F, two M, mean age = 20.6 years, SD = 1.12), adult Spanish speakers in Mexico (six F, four M, mean age = 22.88 years, SD = 1.64), and long-term Mexican immigrants (seven F, two M, mean age = 45.16 years, SD = 9.49, mean age of arrival = 25.33 years, SD = 9.89).

Data and analysis:

Type of phonation (i.e., glottal or modal) was categorically coded and compared across groups and stress types. Acoustic measures, such as amplitude difference between the first two harmonic (H1*−H2*) and harmonics-to-noise ratio (HNR), were also analyzed to examine gradient group differences.

Findings/conclusions:

My findings show that child HS and adult HS present higher rates of glottal phonation than Spanish speakers in Mexico. The child HS, but not the adult HS, show higher rates of glottalization than those of long-term immigrants. Lastly, stressed syllables are more often glottalized than unstressed syllables.

Originality:

In this research I explore connected speech (i.e., word-external empty onsets), an understudied area in heritage language phonology. More specifically, this is the first study that examines empty onset repair strategies in both child and adult HS and analyzes the role of prosodic prominence.

Significance and implications:

I provide evidence for a greater pressure of the majority language during childhood than during adulthood. My results also show that divergent attainment in heritage language production is conditioned by quality of input.
Incidence of Mild Cognitive Impairment, Conversion to Probable Dementia, and Mortality
Authors: Zhang Yun , Natale Ginny , Clouston Sean
Published: May 2021

Background:

Few studies have jointly estimated incidence of MCI, conversion to probable dementia, and mortality in a nationally representatie sample.

Methods:

We used data from six waves of the National Health and Aging Trends Study (2011-2016). Multivariable-adjusted multi-state survival models (MSMs) were used to model incidence upon accounting for misclassification.

Results:

A total of 6,078 eligible NHATS participants were included (average age: 77.49 ± 7.79 years; 58.42% females; 68.99% non-Hispanic white). The incidence of MCI was estimated to be 41.0 [35.5, 47.3]/1,000 person-years (PY). Participants converted to probable dementia at a high rate of 241.3 [189.6, 307.0]/1,000 PY, though a small number also reverted from MCI to cognitively normal. Education was associated with lower incidence of MCI and conversion to probable dementia, but increased mortality in those with MCI. There were also substantial racial and ethnic disparities in the incidence of MCI and dementia.

Conclusions:

Our results underscore the relatively common incidence of and conversions between MCI and dementia in community-dwelling older Americans and uncover the beneficial impact of education to withstand cognitive impairment before death.
An Evaluation Framework for the Dual Contribution of Action Research: Opportunities and Challenges in the Field of Operations Management
Authors: Alfaro-Tanco José A. , Avella Lucía , Moscoso Philip , Näslund Dag
Published: May 2021

The aim of this paper is to analyze the dual contribution of action research (AR) both for research as well as business practice, and how this methodology puts into practice a win-win collaboration between researchers and practitioners. In order to get this, we define three specific objectives: first, we develop an evaluation framework to assess the contribution of AR methodology for research and practitioners in the field of management. Second, we use this framework to evaluate the dual contribution of AR in the specific field of operations management (OM) through a systematic literature review, which allows to analyze a set of 62 papers. Third, we identify opportunities and challenges to enrich the dual contribution of AR studies in OM. Main findings show that the evaluation framework developed represents a tool that may be useful to assess the dual contribution of any study based on AR in the field of management. Besides, the analysis of AR in the field of OM highlights that most of the papers identified are focused on “theory building” (research) and “implementation” (practice) as there are studies that have used AR to develop contributions based on “theory testing” and “theory elaboration,” and also in terms of “diagnosis” and “proposals.” Finally, this study signals that, with the aim to assure research rigor and relevance of practitioners’ contribution of AR studies, it is relevant to give one step ahead and to develop actions such as the use of AR as a metamethodology, to highlight those relevant findings in the whole AR cycle and to develop tools and mechanisms that strengthen its dual contribution, in terms of both research and practice.
The structure modification of seven-membered aza-brigded neonicotinoids in order to investigate their impact on honey bees
Authors: Chen Yuce , Cao Xiaofeng , Chen Xi , Li Zhong , Xu Xiaoyong
Published: May 2021

In order to explore the relationship between the structure and the toxicity to honey bees of seven-membered aza-bridged neonicotinoids, 16 novel seven-membered aza-bridged neonicotinoid analogues are synthesized by replacing the pyridine ring, and changing the substituents on the pyridine ring, the electron-withdrawing group NO2 and the imidazole ring of our previously developed aza-bridged neonicotinoid 1-[(6-chloropyridin-3-yl)methyl)]-10-(2,5-dimethylphenyl)-9-nitro-2,3,5,6,7,8-hexahydro-1 H-5,8-epiminoimidazo azepine (C-29). The insecticidal bioactivities against cowpea aphid ( Aphis craccivora) and the bee toxicities of these compounds are tested. Some of the title compounds present good insecticidal activities against cowpea aphid. The results also show that some of the title compounds exhibit lower bee toxicity than that of C-29 and imidacloprid. This suggests that changing the substituents on the neonicotinoids can influence the toxicity toward honey bees of these analogues.