bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic Investigation in Green Supply Chain considering Channel Service
Authors: Li Qiuxiang , Li Mengmeng , Huang Yimin
Published: July 2020

Considering firm’s innovation input of green products and channel service, this paper, in dynamic environment, studies a dynamic price game model in a dual-channel green supply chain and focuses on the effect of parameter changing on the pricing strategies and complexity of the dynamic system. Using dynamic theory, the complex behaviors of the dynamic system are discussed; besides, the parameter adaptation method is adopted to restrain the chaos phenomenon. The conclusions are as follows: the stable scope of the green supply chain system enlarges with decision makers’ risk-aversion level increasing and decreases with service value increasing; excessive adjustment of price parameters will make the green supply chain system fall into chaos with a large entropy value; the attraction domain of initial prices shrinks with price adjustment speed increasing and enlarges with the channel service values raising. As the dynamic game model system is in a chaotic state, the profit of the manufacturer will be damaged, while the efficiency of the retailer will be improved. The system would be kept at a stable state and casts off chaos by the parameter adaptation method. Results are significant for the manager to make reasonable price decision.
Forecasting CDS Term Structure Based on Nelson–Siegel Model and Machine Learning
Authors: Kim Won Joong , Jung Gunho , Choi Sun-Yong
Published: July 2020

In this study, we analyze the term structure of credit default swaps (CDSs) and predict future term structures using the Nelson–Siegel model, recurrent neural network (RNN), support vector regression (SVR), long short-term memory (LSTM), and group method of data handling (GMDH) using CDS term structure data from 2008 to 2019. Furthermore, we evaluate the change in the forecasting performance of the models through a subperiod analysis. According to the empirical results, we confirm that the Nelson–Siegel model can be used to predict not only the interest rate term structure but also the CDS term structure. Additionally, we demonstrate that machine-learning models, namely, SVR, RNN, LSTM, and GMDH, outperform the model-driven methods (in this case, the Nelson–Siegel model). Among the machine learning approaches, GMDH demonstrates the best performance in forecasting the CDS term structure. According to the subperiod analysis, the performance of all models was inconsistent with the data period. All the models were less predictable in highly volatile data periods than in less volatile periods. This study will enable traders and policymakers to invest efficiently and make policy decisions based on the current and future risk factors of a company or country.
Influence of Shape and Piezoelectric-Patch Length on Energy Conversion of Bluff Body-Based Wind Energy Harvester
Authors: Zhang Changjiang , Ding Lin , Yang Lin , Yang Zuomei , Yang Zesheng , Zhang Li
Published: July 2020

The technology of scavenging ambient energy to realize self-powered of wireless sensor has an important value in practice. In order to investigate the effects of piezoelectric-patch length and the shape of front bluff body on energy conversion of the wind energy harvester by flow-induced vibration, the characteristics of a piezoelectric wind energy harvester based on bluff body are experimentally studied in this work. Four different section shapes of the bluff body, including triangular cylinder, trapezoidal cylinder, reverse trapezoidal cylinder, and square cylinder, are tested. The piezoelectric patch is attached on the leeward side of the bluff body. The lengths of piezoelectric patch are considered as 1.0D–1.4D (D is the characteristic length of the bluff body). It is found that the length of the piezoelectric patch and the shape of the front bluff body play a vital role in improving the performance of wind energy harvester. For the reverse trapezoidal cylinder and square cylinder, the back-to-back vortex-induced vibration (VIV) and galloping phenomenon can be observed. In addition, the energy harvesting performance of the reverse trapezoidal cylinder piezoelectric harvester is the best. The maximum average peak voltage of 1.806 V and the output power of P=16.3 μW can be obtained when external resistance and the length of piezoelectric patch are 100 KΩ and 1.1D, respectively.
Network Pharmacology‐Based Analysis of the Pharmacological Mechanisms of Aloperine on Cardiovascular Disease
Authors: Huang Bingwu , Xiong Juncheng , Zhao Xuyong , Zheng Yihan , Zhu Ning
Published: July 2020

Background. Aloperine is an active component of Sophora alopecuroides Linn, which has been extensively applied for the treatment of cardiovascular disease (CVD). However, our current understanding of the molecular mechanisms supporting the effects of aloperine on CVD remains unclear. Methods. Systematic network pharmacology was conducted to provide testable hypotheses about pharmacological mechanisms of the protective effects of aloperine against CVD. Detailed structure was obtained from Traditional Chinese Medicines Integrated Database (TCMID). Target genes of aloperine against CVD were collected from SwissTargetPrediction, DrugBank database, and Online Mendelian Inheritance in Man (OMIM) database. Gene Ontology (GO) enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway performance, and network construction were adopted to explore common target genes. Results. Our findings showed that 25 candidate targets were the interacting genes between aloperine and CVD. GO analysis revealed biological process, cellular component, and molecular function of these target genes. More importantly, the majority of enrichment pathways was found to be highly associated with the nitrogen metabolism by KEGG analysis. Core genes particularly in nitrogen metabolism pathway including carbonic anhydrase (CA) III, CA IV, CA VA, CA VB, CA VI, CA VII, CA IX, CA XII, and CA XIV can be modulated by aloperine in the nitrogen metabolism. Conclusion. Our work revealed the pharmacological and molecular mechanisms of aloperine against CVD and provided a feasible tool to identify the pharmacological mechanisms of single active ingredient of traditional Chinese medicines.
Systematic Elucidation of the Mechanism of Oroxylum indicum via Network Pharmacology
Authors: Chen Junmin , Chen Jianyong , Lu Jingrong
Published: July 2020

Oroxylum indicum (O. indicum) is an important traditional Chinese medicine that exerts a wide spectrum of pharmacological activities. However, the pharmacological effect of O. indicum and its mechanism of action have not to be systematically elucidated yet. In this study, the druggability for active compounds of O. indicum was assessed via Traditional Chinese Medicine Systems Pharmacology Database (TCMSP), and the potential drug targets of O. indicum were identified using PharmMapper database. Additionally, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed via WebGestalt. Drug‐target‐pathway networks were constructed using Cytoscape to give a visual view. Our findings revealed that O. indicum has extremely superb druggability with 41 putative identified target genes. GO, KEGG, and network analyses showed that these targets were associated with inflammatory immunoreactions, cancer, and other biological processes. In summary, O. indicum is predicted to target multiple genes/proteins and pathways that shape a network which can exert systematic pharmacological effects.
Secondary Prevention in Hereditary Breast and/or Ovarian Cancer Syndromes Other Than BRCA
Authors: Piombino Claudia , Cortesi Laura , Lambertini Matteo , Punie Kevin , Grandi Giovanni , Toss Angela
Published: July 2020

BRCA1- and BRCA2-associated hereditary breast and ovarian cancer syndromes are among the best-known and most extensively studied hereditary cancer syndromes. Nevertheless, many patients who proved negative at BRCA genetic testing bring pathogenic mutations in other suppressor genes and oncogenes associated with hereditary breast and/or ovarian cancers. These genes include TP53 in Li–Fraumeni syndrome, PTEN in Cowden syndrome, mismatch repair (MMR) genes in Lynch syndrome, CDH1 in diffuse gastric cancer syndrome, STK11 in Peutz–Jeghers syndrome, and NF1 in neurofibromatosis type 1 syndrome. To these, several other genes can be added that act jointly with BRCA1 and BRCA2 in the double-strand break repair system, such as PALB2, ATM, CHEK2, NBN, BRIP1, RAD51C, and RAD51D. Management of primary and secondary cancer prevention in these hereditary cancer syndromes is crucial. In particular, secondary prevention by screening aims to discover precancerous lesions or cancers at their initial stages because early detection could allow for effective treatment and a full recovery. The present review aims to summarize the available literature and suggest proper screening strategies for hereditary breast and/or ovarian cancer syndromes other than BRCA.
An Intelligent Diagnosis Method of Brain MRI Tumor Segmentation Using Deep Convolutional Neural Network and SVM Algorithm
Authors: Wu Wentao , Li Daning , Du Jiaoyang , Gao Xiangyu , Gu Wen , Zhao Fanfan , Feng Xiaojie , Yan Hong
Published: July 2020

Among the currently proposed brain segmentation methods, brain tumor segmentation methods based on traditional image processing and machine learning are not ideal enough. Therefore, deep learning-based brain segmentation methods are widely used. In the brain tumor segmentation method based on deep learning, the convolutional network model has a good brain segmentation effect. The deep convolutional network model has the problems of a large number of parameters and large loss of information in the encoding and decoding process. This paper proposes a deep convolutional neural network fusion support vector machine algorithm (DCNN-F-SVM). The proposed brain tumor segmentation model is mainly divided into three stages. In the first stage, a deep convolutional neural network is trained to learn the mapping from image space to tumor marker space. In the second stage, the predicted labels obtained from the deep convolutional neural network training are input into the integrated support vector machine classifier together with the test images. In the third stage, a deep convolutional neural network and an integrated support vector machine are connected in series to train a deep classifier. Run each model on the BraTS dataset and the self-made dataset to segment brain tumors. The segmentation results show that the performance of the proposed model is significantly better than the deep convolutional neural network and the integrated SVM classifier.
Orthodontic Bonding: Review of the Literature
Authors: Alzainal Ali H. , Majud Ahmed Shehab , Al-Ani Abdulfatah M. , Mageet Adil O.
Published: July 2020

Background. Patients seeking orthodontic treatment are increasing, and clinicians often have to place brackets on various surfaces aside from enamel. It is crucial to know what materials or instruments are required to bond brackets to each surface.Objective. This study aims to serve as a clinical guideline for the safest and most effective approaches taken to condition various surfaces for bonding to orthodontic brackets and provide background knowledge on the subject.Materials and Methods. PubMed and EBSCO databases were searched, along with the use of Google Scholar search engine, to obtain relevant articles published in English in peer-reviewed journals, from 1955 to 2020. Keywords used were Shear bond strength; Orthodontic bracket; Base design; Etching; Sandblasting; Laser; Conditioning; Enamel; Ceramic; Porcelain; Gold; Amalgam; Composite.Conclusion. Even though orthophosphoric acid is the most widely used enamel conditioning agent, laser etching should be considered to avoid enamel decalcification. Hydrofluoric acid is the current standard for ceramic conditioning; however, its use intraorally should be minimized due to its toxicity. Orthophosphoric acid, CoJet-Sand air abrasion, and laser etching are viable alternatives for conditioning ceramic. Monobond Etch & Prime is toxic and should not be used intraorally. Composite can be conditioned by bur roughening, and the use of ceramic brackets is recommended. Amalgam and gold surfaces can be conditioned adequately by air abrasion. Despite the claims of many authors, the maximum shear forces that orthodontic brackets are subjected to are not 6–8 mega pascal (MPa). Further investigation is required in that regard. More in vivo studies need to be performed to confirm the in vitro results.
Analysis of Stiffness and Energy Consumption of Nonlinear Elastic Joint Legged Robot
Authors: Chen Dongliang , Zhang Jindong , Weng Xutao , Zhang Yunjian , Shi Zhonghui
Published: July 2020

In order to reduce the energy consumption of the legged robot in walking, this paper designs a kind of nonlinear elastic joint from the flexible variable-stiffness joint based on the mammal walking on the limb and optimizes the leg structure of the legged robot. The motor is rigidly connected to the articulated lever. When the lever is accelerated or decelerated, the elastic unit is introduced. The system can be considered as a special variable-rate elastic system. This paper will study it from theory and simulation experiments. Based on the dynamic analysis, a functional relationship between the output torque and the torsion spring stiffness and between the energy consumption and the torsion spring stiffness was established. By finding the extremum, the two optimum torsional spring stiffness that can minimize the required output average torque and the energy consumed during one cycle of motion were deduced. The results show that using this design in a reasonable position can effectively reduce the energy consumption of the system and can achieve up to a 50% reduction in energy consumption.
Thermal Liability of Hyaloclastite in the Krafla Geothermal Reservoir, Iceland: The Impact of Phyllosilicates on Permeability and Rock Strength
Authors: Weaver Josh , Eggertsson Guðjón H. , Utley James E. P. , Wallace Paul A. , Lamur Anthony , Kendrick Jackie E. , Tuffen Hugh , Markússon Sigurður H. , Lavallée Yan , Gomez-Rivas Enrique
Published: July 2020

Geothermal fields are prone to temperature fluctuations from natural hydrothermal activity, anthropogenic drilling practices, and magmatic intrusions. These fluctuations may elicit a response from the rocks in terms of their mineralogical, physical (i.e., porosity and permeability), and mechanical properties. Hyaloclastites are a highly variable volcaniclastic rock predominantly formed of glass clasts that are produced during nonexplosive quench-induced fragmentation, in both subaqueous and subglacial eruptive environments. They are common in high-latitude geothermal fields as both weak, highly permeable reservoir rocks and compacted impermeable cap rocks. Basaltic glass is altered through interactions with external water into a clay-dominated matrix, termed palagonite, which acts to cement the bulk rock. The abundant, hydrous phyllosilicate minerals within the palagonite can dehydrate at elevated temperatures, potentially resulting in thermal liability of the bulk rock. Using surficial samples collected from Krafla, northeast Iceland, and a range of petrographic, mineralogical, and mechanical analyses, we find that smectite dehydration occurs at temperatures commonly experienced within geothermal fields. Dehydration events at 130, 185, and 600°C result in progressive mass loss and contraction. This evolution results in a positive correlation between treatment temperature, porosity gain, and permeability increase. Gas permeability measured at 1 MPa confining pressure shows a 3-fold increase following thermal treatment at 600°C. Furthermore, strength measurements show that brittle failure is dependent on porosity and therefore the degree of thermal treatment. Following thermal treatment at 600°C, the indirect tensile strength, uniaxial compressive strength, and triaxial compressive strength (at 5 MPa confining pressure) decrease by up to 68% (1.1 MPa), 63% (7.3 MPa), and 25% (7.9 MPa), respectively. These results are compared with hyaloclastite taken from several depths within the Krafla reservoir, through which the palagonite transitions from smectite- to chlorite-dominated. We discuss how temperature-induced changes to the geomechanical properties of hyaloclastite may impact fluid flow in hydrothermal reservoirs and consider the potential implications for hyaloclastite-hosted intrusions. Ultimately, we show that phyllosilicate-bearing rocks are susceptible to temperature fluctuations in geothermal fields.
A Tissue-Engineered 3D Microvessel Model Reveals the Dynamics of Mosaic Vessel Formation in Breast Cancer
Authors: Silvestri Vanesa L. , Henriet Elodie , Linville Raleigh M. , Wong Andrew D. , Searson Peter C. , Ewald Andrew J.
Published: July 2020

In solid tumors, vascular structure and function varies from the core to the periphery. This structural heterogeneity has been proposed to influence the mechanisms by which tumor cells enter the circulation. Blood vessels exhibit regional defects in endothelial coverage, which can result in cancer cells directly exposed to flow and potentially promoting intravasation. Consistent with prior reports, we observed in human breast tumors and in a mouse model of breast cancer that approximately 6% of vessels consisted of both endothelial cells and tumor cells, so-called mosaic vessels. Due, in part, to the challenges associated with observing tumor–vessel interactions deep within tumors in real-time, the mechanisms by which mosaic vessels form remain incompletely understood. We developed a tissue-engineered model containing a physiologically realistic microvessel in coculture with mammary tumor organoids. This approach allows real-time and quantitative assessment of tumor–vessel interactions under conditions that recapitulate many in vivo features. Imaging revealed that tumor organoids integrate into the endothelial cell lining, resulting in mosaic vessels with gaps in the basement membrane. While mosaic vessel formation was the most frequently observed interaction, tumor organoids also actively constricted and displaced vessels. Furthermore, intravasation of cancer cell clusters was observed following the formation of a mosaic vessel. Taken together, our data reveal that cancer cells can rapidly reshape, destroy, or integrate into existing blood vessels, thereby affecting oxygenation, perfusion, and systemic dissemination. Our novel assay also enables future studies to identify targetable mechanisms of vascular recruitment and intravasation.

Significance:

A tissue-engineered microdevice that recapitulates the tumor–vascular microenvironment enables real-time imaging of the cellular mechanisms of mosaic vessel formation and vascular defect generation.
Neoadjuvant and Adjuvant Pembrolizumab in Resectable Locally Advanced, Human Papillomavirus–Unrelated Head and Neck Cancer: A Multicenter, Phase II Trial
Authors: Uppaluri Ravindra , Campbell Katie M. , Egloff Ann Marie , Zolkind Paul , Skidmore Zachary L. , Nussenbaum Brian , Paniello Randal C. , Rich Jason T. , Jackson Ryan , Pipkorn Patrik , Michel Loren S. , Ley Jessica , Oppelt Peter , Dunn Gavin P. , Barnell Erica K. , Spies Nicholas C. , Lin Tianxiang , Li Tiantian , Mulder David T. , Hanna Youstina , Cirlan Iulia , Pugh Trevor J. , Mudianto Tenny , Riley Rachel , Zhou Liye , Jo Vickie Y. , Stachler Matthew D. , Hanna Glenn J. , Kass Jason , Haddad Robert , Schoenfeld Jonathan D. , Gjini Evisa , Lako Ana , Thorstad Wade , Gay Hiram A. , Daly Mackenzie , Rodig Scott J. , Hagemann Ian S. , Kallogjeri Dorina , Piccirillo Jay F. , Chernock Rebecca D. , Griffith Malachi , Griffith Obi L. , Adkins Douglas R.
Published: July 2020

Purpose:

Pembrolizumab improved survival in patients with recurrent or metastatic head and neck squamous-cell carcinoma (HNSCC). The aims of this study were to determine if pembrolizumab would be safe, result in pathologic tumor response (pTR), and lower the relapse rate in patients with resectable human papillomavirus (HPV)–unrelated HNSCC.

Patients and Methods:

Neoadjuvant pembrolizumab (200 mg) was administered and followed 2 to 3 weeks later by surgical tumor ablation. Postoperative (chemo)radiation was planned. Patients with high-risk pathology (positive margins and/or extranodal extension) received adjuvant pembrolizumab. pTR was quantified as the proportion of the resection bed with tumor necrosis, keratinous debris, and giant cells/histiocytes: pTR-0 (<10%), pTR-1 (10%–49%), and pTR-2 (≥50%). Coprimary endpoints were pTR-2 among all patients and 1-year relapse rate in patients with high-risk pathology (historical: 35%). Correlations of baseline PD-L1 and T-cell infiltration with pTR were assessed. Tumor clonal dynamics were evaluated (ClinicalTrials.gov NCT02296684).

Results:

Thirty-six patients enrolled. After neoadjuvant pembrolizumab, serious (grades 3–4) adverse events and unexpected surgical delays/complications did not occur. pTR-2 occurred in eight patients (22%), and pTR-1 in eight other patients (22%). One-year relapse rate among 18 patients with high-risk pathology was 16.7% (95% confidence interval, 3.6%–41.4%). pTR ≥10% correlated with baseline tumor PD-L1, immune infiltrate, and IFNγ activity. Matched samples showed upregulation of inhibitory checkpoints in patients with pTR-0 and confirmed clonal loss in some patients.

Conclusions:

Among patients with locally advanced, HPV-unrelated HNSCC, pembrolizumab was safe, and any pathologic response was observed in 44% of patients with 0% pathologic complete responses. The 1-year relapse rate in patients with high-risk pathology was lower than historical.
HCN Channel Activity Balances Quiescence and Proliferation in Neural Stem Cells and Is a Selective Target for Neuroprotection During Cancer Treatment
Authors: Johard Helena , Omelyanenko Anna , Fei Gao , Zilberter Misha , Dave Zankruti , Abu-Youssef Randa , Schmidt Linnéa , Harisankar Aditya , Vincent C. Theresa , Walfridsson Julian , Nelander Sven , Harkany Tibor , Blomgren Klas , Andäng Michael
Published: July 2020

Children suffering from neurologic cancers undergoing chemotherapy and radiotherapy are at high risk of reduced neurocognitive abilities likely via damage to proliferating neural stem cells (NSC). Therefore, strategies to protect NSCs are needed. We argue that induced cell-cycle arrest/quiescence in NSCs during cancer treatment can represent such a strategy. Here, we show that hyperpolarization-activated cyclic nucleotide-gated (HCN) ion channels are dynamically expressed over the cell cycle in NSCs, depolarize the membrane potential, underlie spontaneous calcium oscillations and are required to maintain NSCs in the actively proliferating pool. Hyperpolarizing pharmacologic inhibition of HCN channels during exposure to ionizing radiation protects NSCs cells in neurogenic brain regions of young mice. In contrast, brain tumor–initiating cells, which also express HCN channels, remain proliferative during HCN inhibition.

Implications:

Our finding that NSCs can be selectively rescued while cancer cells remain sensitive to the treatment, provide a foundation for reduction of cognitive impairment in children with neurologic cancers.
High-Risk Comorbidity Influences Prognosis in Early Gastric Cancer after Noncurative Endoscopic Submucosal Dissection: A Retrospective Study
Authors: Iwai Naoto , Dohi Osamu , Naito Yuji , Inada Yutaka , Inoue Ken , Okayama Tetsuya , Yoshida Naohisa , Katada Kazuhiro , Kamada Kazuhiro , Uchiyama Kazuhiko , Ishikawa Takeshi , Takagi Tomohisa , Konishi Hideyuki , Itoh Yoshito
Published: July 2020

Background: There are few studies reporting the clinical outcomes of noncurative endoscopic submucosal dissection (ESD) for early gastric cancer (EGC) from the perspective of patient health condition/status. Thus, the aim of this study was to investigate clinical outcomes of noncurative ESD considering not only curability but also patient factors such as advanced age, comorbidities, and nutritional status. Methods: Between April 2007 and March 2012, 95 patients who underwent noncurative ESD for EGC were enrolled in the study. Patients were categorized by treatment after ESD: additional gastrectomy (49 patients) and follow-up (46 patients). Clinical outcomes were evaluated between the 2 groups for overall survival (OS). Results: The absence of lymphovascular involvement and age ≥80 years were significantly associated with decision-making for observation after noncurative ESD. The OS rates were higher in female patients, patients with better Eastern Cooperative Oncology Group performance status (≤1) or low-risk comorbidity (Charlson Comorbidity Index [CCI ≤ 2]), patients with ulcerative findings, and those who underwent radical gastrectomy. Multivariate Cox proportional hazards analysis indicated that presence of a high-risk comorbidity (CCI ≥ 3) was a significant prognostic factor (hazard ratio: 16.43, p = 0.024) in patients who underwent noncurative ESD for EGC. Conclusion: High-risk comorbidity is the primary prognostic parameter in terms of patient factors after noncurative ESD for EGC. The CCI should be considered as a prognostic factor in patients who underwent noncurative ESD for EGC.
МЕДИКО-СОЦІАЛЬНІ АСПЕКТИ ПРОБЛЕМИ НАДАННЯ ПАЛІАТИВНОЇ ДОПОМОГИ У РОДИНАХ ТЯЖКОХВОРИХ ТА ІНКУРАБЕЛЬНИХ ПАЦІЄНТІВ
Authors: Smachylo A. I. , Matviyev L. F. , Kachun O. M. , Ivaskevych L. I.
Published: July 2020

Тернопільський національний медичний університет імені І. Я. Горбачевського МОЗ України
НОВІ ПІДХОДИ ДО КОРЕКЦІЇ ПОСТАВИ У ЛЮДЕЙ МОЛОДОГО ВІКУ
Authors: Telytsya Ye. Yu. , Stelmakh H. O. , Bakaliuk T. H.
Published: July 2020

Стаття присвячена дослідженню ефективності реабілітаційних методик для корекції синдрому крилоподібних лопаток у людей молодого віку з порушенням постави. Отримані дані показують, що включення методу постізометричної релаксації в реабілітаційний комплекс більше сприяє відновленню постави та збільшенню сили мʼязів, які беруть участь у рухах лопатки.
Confessionalization, Symphony, or Democratization?
Authors: Tsvietkova Yulianna V.
Published: July 2020

This article analyzes modern religious life in Ukraine, specifically the relations between religious organizations and government bodies in state and social domains. Particular attention is given to the concrete territorial and historical evolution of state Christian doctrines and church relations in Ukrainian lands. The article also examines the main problems and conflicts regarding the registration and functioning of the largest religious organizations in the country, and relations between them. Special attention is paid to the role that religious organizations play in the democratic processes, and to their effect on the relations between state and church. These relations have unfolded against the background of the political events of the last 15 years in Ukraine and the region: internal social conflicts, the general trend toward pro-European democratization, and the Russian-Ukrainian conflict.
Bulbophyllum lingii, a new species (Malaxideae, Epidedroideae, Orchidaceae) from Hainan, China

Authors: HUANG MING-ZHONG , YANG GUANG-SUI , LAN SI-REN , YIN JUN-MEI
Published: July 2020

A new species, Bulbophyllum lingii (Orchidaceae: Epidedroideae: Malaxideae) from Hainan, China, is described and illustrated. Detailed morphological comparisons indicate that B. lingii is similar to B. catenarium, but differs in having oblong petals, lip margins from base of side-lobes to lip tip recurved, adaxial surface of top part glabrous, stigma with a rather distinct basal callus, foot with about 1/3 free part. The conservation status of B. lingii is assessed and taxonomic notes are provided.
New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature
Authors: Xie Ruihuang , Mu Mu , Fang Xianghui
Published: July 2020

Observed outgoing longwave radiation (OLR) data indicate that convection is nonlinearly sensitive to sea surface temperature anomalies (SSTA) for background SSTs in the 25.25°–30.25°C high-impact range. In this study, we use that observed convection sensitivity to derive a proxy of the convective responses to SSTA only [referred to as fluctuations of the accumulated convection strength (FACT)]. FACT reproduces the pattern of the observed convection response to ENSO in the central and eastern Pacific, but underestimates the amplitude due to the exclusion of the effect of ENSO-induced atmospheric convergence anomalies on convection. We thus use FACT to define new indices (InFACT) of ENSO diversity that explicitly account for the nonlinear convection–SST sensitivity. The amplitude of InFACT allows us to easily classify El Niño events into weak, moderate, and strong types that markedly differ in terms of SSTA spatial patterns and their convective responses. La Niña events classified by InFACT display much less pattern diversity, and mostly differ through their amplitudes. Finally, our study supports some previous studies that the nonlinear SST–convection relation plays a strong role for the development of extreme El Niño events with the presence of high-impact SSTs and large convection anomalies in the equatorial eastern Pacific.
Influence of Siberian Blocking on Long-Lived Cold Surges over the South China Sea
Authors: Pang Bo , Lu Riyu , Ren Rongcai
Published: July 2020

Cold surges occur frequently over the South China Sea (SCS) in winter, and most of them last only a few days. However, some cold surge events can persist longer, for instance, more than 5 days. This study focuses on these long-lived cold surge events and investigates the associated extratropical circulation anomalies. The results indicate that long-lived cold surges, characterized as strong northerlies over the SCS, can be triggered by a successive high anomaly center over East Asia. Accompanying this is an anomalously extensive and quasi-stationary anticyclone over Siberia in the midtroposphere, hinting at a more frequent occurrence of Siberian blocking. Further analyses reveal that the blocking frequency is indeed significantly high over 90°–150°E from day −4 to day +2 relative to the onset of long-lived cold surge events. Furthermore, there exist significant correlations between the leading occurrence of Siberian blocking and the sea level pressure (SLP) anomalies over East Asia, which are directly related to long-lived cold surges. The intensification of the high SLP anomaly over East Asia is found to mainly result from cold advection induced by the anomalous northerly winds along the southeastern edge of the Siberian blocking.
The Energy Efficiency and Public Health in the ASEAN Plus Three Cooperation
Authors: Lu Ching-Cheng , Wu Xin , Chen Xiang , Yang Chih-Yu
Published: July 2020

This study pays more attention to the energy consumption saving, environmental pollution, and health efficiency improvement. We employ the Slack-based measure of Dynamic network Data Envelopment Analysis (DEA) model (DNSBM) to assess the impact of forestry area on annual and overall energy and health efficiency in 2 intertemporal stages, and also put forward on direction and magnitude to be improved respect to the slack variables. For the empirical study, this study employs the 13 countries in the Association of Southeast Asian Nations Plus Three Cooperation (hereinafter referred to as APT) during 2011-2015. From the empirical evidence, it is not easy to raise gross domestic product while reducing energy consumption and PM2.5 emissions to improve energy efficiency. What makes people neglect is the impact of reduced forestry area on health efficiency. Optimistically, all economies are able to adopt measures from policy and technical perspectives, for instance, appropriately adjust energy-related policies, energetically develop innovative energy technologies, and preserve forestry areas, to create a harmonious atmosphere featuring economic development, environmental conservation, and national health and well-being.
Are Filial Piety and Ethnic Community Engagement Associated With Psychological Wellbeing Among Older Chinese American Immigrants? A Cultural Resource Perspective
Authors: Kim Jeung Hyun , Silverstein Merril
Published: July 2020

This research examined whether perceived receipt of filial piety from adult children and ethnic community engagement—two major ethnocultural resources—were associated with psychological wellbeing of older Chinese American immigrants. Analyses used data from the PINE study, a sample of older Chinese adults in Chicago. Tobit regression revealed that elders who received more filial piety and visited community centers experienced less loneliness and depression than their counterparts did. Tests of interactions showed that community center visits moderated the negative relationship between perceived filial piety and depression. Results suggest the importance of community engagement for diminishing depressive symptoms in older Chinese American immigrants, particularly those with culturally weak intergenerational ties. Discussion centers on how visiting community centers in ethnically dense neighborhoods compensates for unfulfilled filial piety expectations by protecting the mental health of minority elders within a rapidly growing and acculturating immigrant population.
Trust-Driven Entrepreneurship for Community Well-Being of Refugees and Their Local Hosts
Authors: Baktir Zeynep , Watson Forrest
Published: July 2020

This article explores community well-being (CWB) outcomes of institutional trust (and distrust) through entrepreneurship in the context of a refugee-hosting society in Turkey. Existing studies show the positive relationship between institutional trust and quality of life (QOL) as well as entrepreneurship and QOL in subsistence contexts. This research, however, explores the relationship between institutional (dis)trust and entrepreneurship on a path to CWB with a special emphasis on refugee and local interactions in the marketplace. Three different paths to the QOL of refugees and/or locals are presented, but only two lead to CWB outcomes encompassing both refugees and locals. Consideration of refugees and locals as both consumers and business owners provides perspective on the interplay between social trust and institutional trust in a socio-culturally heterogeneous subsistence context. The article also discusses implications for theory and practice.
Repair Integrity and Retear Pattern After Arthroscopic Medial Knot-Tying After Suture-Bridge Lateral Row Rotator Cuff Repair
Authors: Takeuchi Yasutaka , Sugaya Hiroyuki , Takahashi Norimasa , Matsuki Keisuke , Tokai Morihito , Morioka Takeshi , Ueda Yusuke , Hoshika Shota
Published: July 2020

Background:

Type 2 failure is a big issue after suture-bridge rotator cuff repair, which may be because of stress concentration at the medial row stitches. We have been performing medial knot-tying after suture-bridge lateral row repair to avoid the stress concentration. This study aimed to evaluate clinical and radiological outcomes after arthroscopic rotator cuff repair using this technique.

Hypothesis:

This technique would yield better radiological outcomes with a reduced type 2 failure rate compared with reported outcomes after conventional suture-bridge repair.

Study Design:

Case series; Level of evidence, 4.

Methods:

The inclusion criteria of this study were (1) full-thickness tears, (2) primary surgery, and (3) minimum 2-year follow-up with pre- and postoperative magnetic resonance imaging (MRI). We investigated active ranges of motion (forward elevation and external rotation), as well as the Japanese Orthopaedic Association (JOA) and University of California, Los Angeles (UCLA), scores preoperatively and at the final follow-up.

Results:

This study included 384 shoulders in 373 patients (205 men and 168 women) with a mean age of 65 years (range, 24-89 years) at the time of surgery. The mean follow-up was 29 months (range, 24-60 months). There were 91 small, 137 medium, 121 large, and 35 massive tears. Postoperative MRI scans demonstrated successful repair in 324 shoulders (84.4%, group S) and retear in 60 shoulders (15.6%). Among 60 retears, 40 shoulders (67%) had type 1 failure (group F1) and 20 shoulders (33%) had type 2 failure (group F2). Forward elevation and external rotation significantly improved after surgery ( P < .001 for both). Postoperative JOA and UCLA scores in group F2 were significantly lower than those in the other groups.

Conclusion:

The medial knot-tying after suture-bridge lateral row repair demonstrated excellent functional and radiological outcomes after surgery, with a retear rate of 15.6%. The type 2 failure showed significantly inferior functional outcomes; however, the rate of type 2 failure was less relative to previous studies using conventional suture-bridge techniques. Our technique could be a good alternative to conventional suture-bridging rotator cuff repair because it may reduce the rate of postoperative type 2 failure.
Microstructure and friction-wear performances of laser-cladded nano-CeO2–reinforced NiCoCrAlY coatings at high temperature
Authors: Jiaxing Li , Jie Xu , Dejun Kong
Published: July 2020

Nano-CeO2–reinforced NiCoCrAlY coatings were fabricated on Ti6Al4V alloy using laser cladding. The morphologies, chemical compositions, and phases of obtained coatings were analyzed using a scanning electron microscope, energy-dispersive spectrometer, and X-ray diffraction, respectively, and the effects of nano-CeO2 mass fraction on the coefficient of friction and the wear rate of NiCoCrAlY coating at 600 °C were investigated using a ball-on-disk wear test. The results show that the nano-CeO2–reinforced NiCoCrAlY coating is mainly composed of NiTi2, Ti3O, CoO, and β-Ti phases, while the new phases of AlTi3 and (Ni, Co)2Ti4O are formed after the wear test. The average coefficients of friction of NiCoCrAlY coatings with the nano-CeO2 mass fractions of 0%, 2%, 4%, and 6% are 0.699, 0.655, 0.636, and 0.615, respectively, and the corresponding wear rates are 4.04 × 10−7, 3.95 × 10−7, 3.13 × 10−7, and 2.35 × 10−7 mm3 N−1 m−1, respectively, which decrease with the increase of nano-CeO2 mass fraction. The wear mechanism is primary adhesive wear and oxidation wear, accompanied by slight abrasive wear, and the addition of nano-CeO2 is the main factor that is enhancing wear resistance.
Dynamic characteristics analysis of blade-casing rubbing faults with abradable coatings
Authors: Zhang Junhong , Lu Xin , Lin Jiewei , Ma Liang , Dai Huwei
Published: July 2020

In this paper, a dynamic model of a “0-2-1” rotor system with rubbing fault between blade and abradable coated casings is developed. The sub-model of rubbing force considers scraping work energy of coating, casing stiffness, and initial clearance between blade tip and casing. A rotor rig is established and samples of abradable coatings are introduced into the rubbing experiment. Vibration characteristics of the rotor system under blade-casing rubbing fault are analyzed. Effects of rotating speed and initial clearance on the rub force and the system vibration are studied. Results show that the vibration of rotor focuses on the fundamental and multiple fundamental frequencies due to the blade-casing rubbing with the abradable coating. The multiple fundamental frequencies, the 2 × and 3 × in particular, are greatly affected by the rotating speed. The fractional harmonic frequencies are strongly influenced by the initial clearance between the blade tip and casing. Besides, the rotating speed and the initial clearance between the blade tip and abradable coating on the casing also affect the amplitude and distribution of the rub force.
Visualization of pool boiling and occurring critical heat flux on coiled wire
Authors: DolatiAsl Kianoush , Bakhshan Younes , Abedini Ehsan
Published: July 2020

Pool boiling is used in various industries and play a significant role in heat transfer. So far, multiple studies have been carried out on investigating boiling and applying heat flux on the wire. In the present paper, the boiling of the coiled wire under atmospheric pressure conditions has been investigated. The fluid temperature inside the pool is considered under both constant (equal to saturation temperature) and variable temperature conditions. The value of the ring density in the coiled wire is considered to be variable. Based on the results, changing the pool liquid temperature changes bubble departure diameter and frequency. Also, increasing the density of the coil ring increases the diameter of bubbles. It has been observed that the bubbles are usually formed inside the coil, and after moving to the two ends of the coil, they leave the coil. However, by increasing the amount of heat flux and the pool liquid temperature, the size of bubbles will be larger; therefore, the bubbles must leave the coil from the empty spaces between the rings. By increasing the amount of applied heat flux, the coil was enclosed in a layer of vapor, which results in a decrease in the amount of heat transfer coefficient, and finally, a sudden increase in temperature on the wire will occur, which indicates the critical heat flux. Also, it has been observed that the critical heat flux always arises in the coil region of wire and not in the straight part of the wire.
Multi-scale optimisation of thin-walled structures by considering a global/local modelling approach
Authors: Izzi Michele I , Montemurro Marco , Catapano Anita , Fanteria Daniele , Pailhès Jérôme
Published: July 2020

In this work, a design strategy for optimising thin-walled structures based on a global-local finite element (FE) modelling approach is presented. The preliminary design of thin-walled structures can be stated in the form of a constrained non-linear programming problem (CNLPP) involving requirements of different nature intervening at the different scales of the structure. The proposed multi-scale optimisation (MSO) strategy is characterised by two main features. Firstly, the CNLPP is formulated in the most general sense by including all design variables involved at each pertinent scale of the problem. Secondly, two scales (with the related design requirements) are considered: (a) the structure macroscopic scale, where low-fidelity FE models are used and (b) the structure mesoscopic scale (or component level), where more accurate FE models are involved. In particular, the mechanical responses of the structure are evaluated at both global and local scales, avoiding the use of approximated analytical methods. The MSO is here applied to the least-weight design of an aluminium fuselage barrel of a wide-body aircraft. Fully parametric global and local FE models are interfaced with an in-house metaheuristic algorithm. Refined local FE models are created only for critical regions of the structure, automatically detected during the global analysis, and linked to the global one, thanks to the implementation of a sub-modelling approach. The whole process is completely automated, and once set, it does not need any further user intervention.
New micronutrient biocomponents based on blackcurrant seeds pomace – Bench-scale kinetic studies
Authors: Chojnacka Katarzyna , Samoraj Mateusz , Tuhy Łukasz , Mironiuk Małgorzata , Moustakas Konstantinos , Witek-Krowiak Anna
Published: July 2020

In the present work new universal bench-scale plant for biosorption, useful in production of new micronutrient biocomponents, was described. The new installation enabling working in a fixed bed or stirred tank batch mode. Reactors may also be used in serial or parallel mode, which gives many application possibilities.

Copper ions were selected as a sorbate for kinetic modelling. The results of the adsorption capacities of Cu(II) were 13.9 mg/g for fixed bed and 12.8 mg/g for stirred tank. During biosorption of Cu(II) ions from aqueous solution ion exchange and release of Ca(II), K(I), Mg(II), and Na(I) were observed. For kinetics description of stirred tank process pseudo-1st-and pseudo-2nd order models were used. For fixed bed process the Thomas, Yoon-Nelson, Adams-Bohart and Wolborska models were used. The use of blackcurrant seed residues as biosorbents enables the generation of new products from waste biomass, which can become an alternative to the traditional fertilizers with microelements. The presented technology is an attempt to reduce environmental impact of the conventional micronutrient fertilizers, which contain toxic chelators such as EDTA. Minimization of waste and maximization of product output makes it an efficient tool supporting cleaner production.
Towards simultaneous localization and mapping tolerant to sensors and software faults: Application to omnidirectional mobile robot
Authors: Kellalib Billel , Achour Nouara , Coelen Vincent , Nemra Abdelkrim
Published: July 2020

In the last few years, simultaneous localization and mapping became an important topic of research in the robotics community. This article proposes an approach for autonomous navigation of mobile robots in faulty situations. The main objective is to extend the fault tolerance strategy to simultaneous localization and mapping in presence of sensor faults or software faults in the data fusion process. Fault detection and isolation technique is performed based on duplication–comparison method and structured residuals. The proposed fault tolerance approach is based on the extended Kalman filter for simultaneous localization and mapping when an absolute localization sensor is available. The validation of the proposed approach and the extended Kalman filter for simultaneous localization and mapping algorithm is performed from experiments employing an omnidrive mobile robot, equipped with embedded sensors, namely: wheel encoders, gyroscope, two laser rangefinders and external sensor for the absolute position (indoor global positioning system). The obtained results demonstrate the effectiveness of the proposed approach where it was found that its fault tolerance performance is based essentially on the selected residuals and the values of the fault detection thresholds to be used for the fault detection and isolation.
The ratio of microcharcoal to phytolith content in soils as a new proxy of fire activity
Authors: Wen Mengdan , Li Rencheng , Vachula Richard S. , Wang Xiude , Qin Yang , Yuan Qiang , Tao Xinyue
Published: July 2020

Microcharcoal in soils and sediments is an ideal proxy for studying fire activity. Phytoliths in soils and sediments record the environmental conditions in which the phytoliths were formed by plants. However, our understanding of the relationships between fire activity, plant communities, and the preservation of microcharcoal and phytoliths in soils and sediments remains limited. In this study, we collected soils and sediments across a gradient of burned and unburned forest in southwest China, and analyzed the microcharcoals and phytoliths in these samples to understand the relationships between these microfossils (ratios of microcharcoal to phytolith particles (Ch/Ph)), fire activity, and vegetation cover. We show that the Ch/Ph ratios recorded fire activity and were significantly different across the gradient of burned to unburned forest. The highest and lowest ratios (0.25 and 0.01) were found in burned forest (Bs1) and unburned forest samples (Us2), respectively. The ratios gradually decreased with increasing distance from the fire. This study suggests the ratio (Ch/Ph) to be a useful proxy for studying fire activity and/or history using soils and sediments.