bluuebunny/crossref_metadata_2025 huggingface dataset:
Genome-Wide Expression and Network Analyses of Mutants in Key Brassinosteroid Signaling Genes
Authors: Rahmani Razgar Seyed , Shi Tao , Zhang Dongzhi , Gou Xiaoping , Yi Jing , Marchal Kathleen , Li Jia
Published: September 2020

BackgroundBrassinosteroid (BR) signaling regulates plant growth and development in concert with other signaling pathways. Although many genes have been identified that play a role in Brassinosteroid (BR) signaling, the biological and functional consequences of disrupting those key BR genes still requires detailed investigation.ResultsHere we performed phenotypic and transcriptomic comparisons of A. thaliana lines carrying a loss-of-function mutation in BRI1 gene, bri1-5, that exhibits a dwarf phenotype along with its three activation-tag suppressor lines that were able to partially revert the bri1-5 mutant phenotype to a WT phenotype, namely bri1-5/bri1-1D, bri1-5/brs1-1D, bri1-5/bak1-1D. From the three investigated bri1-5 suppressors, bri1-5/bak1-1D was the most effective suppressor at the transcriptional level. All three bri1-5 suppressors showed altered expression of the genes in the abscisic acid (ABA signaling) pathway, indicating that ABA likely contributes to the partial recovery of the wild type phenotype in these bri1-5 suppressors. Network analysis revealed crosstalk between BR and other phytohormone signaling pathways, suggesting that interference with one hormone signaling pathway affects other hormone signaling pathways. In addition, differential expression analysis suggested the existence of a strong negative feedback from BR signaling on BR biosynthesis and also predicted that BRS1, rather than being directly involved in signaling, is likely responsible for providing an optimal environment for the interaction between BRI1 and its ligand. ConclusionsOur study provides insights into the molecular mechanisms and functions of key brassinosteroid (BR) signaling genes, especially BRS1.
Fetal Heart Rate Classification Based on Time-Frequency Domain Features
Authors: Que Yuqing , Chen Dingke , Tong Lei , Chen Chaomin
Published: September 2020

Background: Fetal heart rate(FHR) monitor provides an effective auxiliary diagnosis method for obstetricians, which greatly reduces the misdiagnosis rate.However, sometimes the obstetrician's subjective interpretation is prone to misinterpretation due to different cognition or poor interpretation of the graphics itself. At present, no fetal heart rate monitor can automatically determine the fetal intrauterine state.Based on actual clinical needs, this article mainly studies fetal heart rate signals, designs algorithms to extract feature parameters of fetal heart rate, provides doctors with more accurate and objective quantitative indicators, and reduces the rate of misdiagnosis caused by subjective interpretation.Method: This study uses the CTU-UHB database containing 552 CTG data, and focuses on the analysis of fetal heart rate data. According to the definition of terms in the consensus of electronic fetal heart monitoring experts, the design algorithm extracts the fetal heart rate characteristic parameters based on time domain analysis, such as fetal heart rate baseline, acceleration, deceleration, long variation and short variation, and extracts features based on frequency domain analysis Such as low frequency power, high frequency power, etc. In addition, the approximate entropy of nonlinear parameters is extracted. Then based on the 21 extracted feature parameters, the fetal intrauterine state is classified into two categories, and the training classifier model is established according to the principle of support vector machine. Randomly change the training group (387 cases) many times and enter the test group (165 cases) for prediction.Results: In this paper, the fetal umbilical artery pH value measured after delivery was selected as the FHR signal classification standard, and fetuses with pH greater than 7.05 were classified as normal group, and fetuses with pH≤7.05 were classified as suspicious group. Randomly select the training group and the test group, and after many training and testing of the classifier, the accuracy rate of the test group reaches 90.9%,sensitivity(Se) is 96.3%,specificity(Sp) is 63%.Conclusion：In this paper, support vector machine (SVM) is used to classify fetal heart rate, combined with time domain and frequency domain features, and the classification results are good, indicating that multi-modal features can improve the classification results.
Postoperative Analgesic Efficiency of Quadratus Lumborum Block Iii Versus Peritubal Local Infiltration in Patients Undergoing Percutaneous Nephrolithotomy Operation: A Randomized Controlled Trial
Authors: Armanious Simon Halim , Abdelrahman Tamer Nabil , Hameed Gamal Adel Abd el , Botros Joseph M.
Published: September 2020

Background:The postoperative pain after percutaneous nephrolithotomy (PCNL) can be managed by many peripheral blocks techniques (e.g., paravertebral and quadrates lumborum block), and local anesthesia infiltration. Therefore, this prospective study was conducted to evaluate the effect of quadratus lumborum type III versus peritubal local infiltrating on postoperative analgesia for patients undergoing PCNL.Methods:Eligible subjects after exclusion of COVID-19 patients, with renal stones less than 2 cm undergoing PCNL surgery under general anesthesia. Eighty patients were randomly allocated to 2 equal groups. In the Quadratus group, participant received 20 mL of bupivacaine 0.25% in the fascial plane between the quadratus lumborum and Psoas muscle; and in the peritubal group, patients received 10 mL of bupivacaine 0.25% around the nephrostomy tube at 6 and 12 o’clock positions (total 20 mL). The quadratus lumborum block and peritubal infiltration were performed by the primary investigator and the urologist, respectively. All patients received standard postoperative analgesia (paracetamol, ketorolac, and morphine via patient-controlled analgesia. Both patients and Data collecting staff were blinded to study group. Primary outcome was the visual analogue score at rest and on coughing or movement at 2, 4, 6, 12, and 24 hours. Secondary outcomes were 24 hours total morphine consumption, 1st use of morphine pump.Results:Data were analyzed from 78 patients (39 patients in each group). The mean resting VAS score in quadratus group at 6 and 12 hours was (3), while the mean VAS in peritubal group was (4) and (5.5) at 6 and 12 hours, respectively. Dynamic VAS score in peritubal group at 6 hours was (mean 6) with p<0.0001 when compared to resting value. The 24 hours morphine consumption was 8-11mg and 17-20 mg, in quadratus and peritubal group, respectively (the difference in mean of 9 at the 95% confidence interval; p<0.0001). patients start to use morphine pump after 66.6 min and 72.1 min in group peritubal and quadratus, respectively.Conclusion:Quadratus Lumborum block was more effective than Peritubal LA infiltration regarding postoperative VAS score both at rest and during movement with lower postoperative morphine consumption and more satisfaction in patients undergoing PCNL surgery.Trial registration: This prospective randomized trial was registered at Clinical Trials.gov in December, 2019. https://clinicaltrials.gov/ct2/show/NCT04215705.
MiR-15a-5p Inhibits Migration and Invasion of Ovarian Cancer Cells by Targeting PELP1
Authors: Yang Yujia , Yuan Li , Yang Bing
Published: September 2020

Background: Ovarian cancer is one of the most common malignancy of the female reproductive system. Hsa‐miR‐15a‐5p (miR‐15a-5p) has been reported with tumor‐suppressing roles in various cancers. This study aims to determine the role of miR-15a-5p during the progression of ovarian cancer. Methods: We used bioinformatics, luciferase reporter assays, wound-healing, transwell invasion assays, quantitative Real-time polymerase chain reaction (qRT-PCR) and Western blot to dissect the molecular mechanism of how miR-15a-5p may cause metastasis in ovarian cancer. Results: The upregulation of miR‐15a-5p inhibited growth, migration and invasion in ovarian cancer cells. Furthermore, miR-15a-5p suppressed epithelial mesenchymal transition (EMT) of ovarian cancer cell in vitro, evidenced by expression alteration of E‐cadherin and vimentin. Proline-, glutamic acid- and leucine-rich protein 1 (PELP1) was identified as the direct target of miR-15a-5p and downregulated by miR-15a-5p. The inhibitory effect of miR-15a-5p on migration, invasion and EMT was rescued by PELP1. Additionally, downregulation of PELP1 mimicked the suppressive impact of miR-15a-5p on ovarian carcinoma cells. Conclusions: Our data indicated that miR-15a-5p inhibited migration, invasion and EMT of ovarian cancer cells by targeting PELP1, which might relate to the progression and metastasis of ovarian cancer.
Association of breast cancer and diabetes mellitus in Korean postmenopausal women
Authors: Kim Boram , Han Jee Hye , Kwak Hee Yong , Kwon Kil Young , Kim Junghwan
Published: September 2020

Background: Diabetes mellitus has been associated with an increased risk of breast cancer. This association is, however, controversial, and not elucidated in Asia. This study aimed to determine the association between diabetes mellitus and breast cancer risk in Korean women.Methods: This retrospective study included subjects who underwent an ultrasound-localized needle-extracted biopsy to investigate questionable breast findings at the Eulji University Hospital breast clinic in Seoul, Korea, between 2000 and 2019. The medical records of the participants were reviewed to determine their age, diabetic status, and breast pathology findings. The participants were categorized into two groups, namely, the control group, that included those with benign breast disease; and, the breast cancer group. Logistic regression analyses were performed to assess the association between diabetes and breast cancer amongst pre- and post-menopausal participants.Results: A total of 1268 participants were included in this analysis. We found that diabetes was significantly associated with an increased odds of breast cancer (odds ratio [OR] 2.24; 95% confidence interval [CI], 1.76 to 2.84). Additionally, postmenopausal participants (aged ≥ 50 years) showed increased odds for breast cancer (OR 4.32; 95% CI, 3.37 to 5.53). The association between diabetes and breast cancer was significant, after adjusting for age, in the postmenopausal group (adjusted OR [aOR] 1.60; 95% CI, 1.09 to 2.35), but was not significant in the premenopausal group (aOR 1.10; 95% CI, 0.76 to 1.60).Conclusion: Diabetes was associated with increased odds of breast cancer compared to benign breast disease in postmenopausal women in Korea.
Nonlinear Modeling for Broadband Power Amplifiers based on Cloud Computing
Authors: Su Rina , Liu Tai-Jun , Ye Yan , Xu Gao-Ming
Published: September 2020

This paper discusses the nonlinear dynamic behavior modeling for broadband power amplifiers based on cloud computing. The nonlinear parameters of the wideband amplifier were extracted through remote data acquisition and the analysis of the power amplifier’s input and output signals. The Long Short-Term Memory neural network was used to accurately model the dynamic nonlinearity of the power amplifier. It solved the problem of limitation by time and space for the digital pre-distortion system and addressed big data remote processing for the nonlinear modeling of the broadband amplifier in 5G high bandwidth and high rate communication environment. By using the technology, it provides support for the efficient utilization of experimental resources and accurate nonlinear modeling of a broadband power amplifier.
Potential anti-arteriovenous malformations effect of sirolimus on angiogenesis induced by maxillofacial venous hypertension
Authors: Li Xiao , Gui Zhipeng , Han Yifeng , Yang Xitao , Wang Zhenfeng , Zheng Lianzhou , Zhang Liming , Wang Deming , Fan Xindong , Su Lixin
Published: September 2020

Background: This study aimed to explore the possible role and mechanism of venous hypertension (VH) in the occurrence and development of arteriovenous malformations (AVMs) and to study the therapeutic effect of VH regulation on AVMs to provide insight into AVM pathogenesis and explore new treatments.Methods: Maxillofacial VH models were established by cervical vascular anastomosis. Osteogenesis and angiogenesis in the model rats were analysed by imaging and histology, and the inhibitory effects of intraperitoneal (ip) sirolimus injection on angiogenesis were detected. The effect of sirolimus on the biological behaviour of human umbilical vein endothelial cells (HUVECs) cultured in vitro and mechanism of sirolimus were detected by cytology.Result: The local microvessel density increased, the vessels showed tortuous dilation, and mRNA and protein levels of angiogenesis-related genes were increased in venous hypertension environment. These phenomena were alleviated or eliminated by ip injection of a sirolimus solution. Sirolimus inhibited proliferation, tubule formation, migration, invasion, angiogenesis-related gene transcription and translation, and phosphorylation of mammalian target of rapamycin (mTOR) and its downstream substrate proteins S6K1 and 4EBP1.Conclusions: Abnormal angiogenesis caused by VH is related to abnormal activation of the mTOR pathway, which is important in regulating local angiogenesis; sirolimus inhibited hypertension-induced excessive angiogenesis in vivo and in vitro through the mTOR signalling pathway. This study provides a basis for further mechanistic study of AVM formation and insight into sirolimus as a possible target drug for AVM management.
A Rapid Microwave Mediated Polyethyleneglycol Embedding Method Showing Retention of Intracellular Specialized Metabolites in Leaves of Cinnamomum Tamala (Buch-Ham.) T. Nees & Nees
Authors: Saha Sulagna , Bhattacharya Raktim , Mitra Adinpunya
Published: September 2020

Polyethyleneglycol (PEG) is considered one of the most effective substitutions for paraffin in plant histochemistry as an embedding medium. A rapid and straightforward method of PEG embedding has been developed that resulted in a significant reduction of infiltration time than the traditional method of PEG embedding. The material used for PEG embedding was leaves of Cinnamomum tamala, a member of Lauraceae. Samples were put successively in aqueous solutions of PEG 6000 with increasing concentration for infiltration. A microwave oven was used as a mode of heating medium. The infiltration was completed within 2 h. After the completion of infiltration, the samples were embedded in PEG and solidified. Compared with the existing methods available for PEG infiltration and embedding, this microwave mediated PEG embedding method saves significant time; this also saves the tissue from long-term heat-induced damage. Retention of intracellular metabolites, which was not possible in earlier PEG embedded methods, has also demonstrated in the tissue.
Application of Optimal-Jerk Trajectory Planning in Gait Balance Training Robot
Authors: Fu Yuan , Chen Dian-Sheng , We Xiao-Dong , Wang Min
Published: September 2020

Aiming at the gait and balance disorder of the elderly with the increase of age and the occurrence of various senile diseases, this paper proposes a novel gait balance training robot (G-Balance) based on a 6-DOF parallel platform. Based on the platform movement and IMU wearable sensors, two training modes, active and passive, have been developed to achieve vestibular stimulation. Virtual reality technology is also combined to achieve visual stimulation. In the active training mode, the elderly actively exercise to control the posture change of the platform and the switching of the virtual scene. In the passive training mode, the platform movement is combined with the virtual scene to simulate some bumpy environments such as earthquakes to enhance the human anti-interference ability. In order to achieve smooth switching of the scene, continuous speed and acceleration of the platform motion are required in some scenarios, in which trajectory planning algorithm is applied to meet the requirement. This paper expounds the application of trajectory planning algorithm in balance training mode.
METHOD FOR DETECTING SHILLING ATTACKS BASED ON IMPLICIT FEEDBACK IN RECOMMENDER SYSTEMS
Authors: Chala Oksana , Novikova Lyudmyla , Chernyshova Larysa , Kalnitskaya Angelika
Published: September 2020

The problem of identifying shilling attacks, which are aimed at forming false ratings of objects in the recommender system, is considered. The purpose of such attacks is to include in the recommended list of items the goods specified by the attacking user. The recommendations obtained as a result of the attack will not correspond to customers' real preferences, which can lead to distrust of the recommender system and a drop in sales. The existing methods for detecting shilling attacks use explicit feedback from the user and are focused primarily on building patterns that describe the key characteristics of the attack. However, such patterns only partially take into account the dynamics of user interests. A method for detecting shilling attacks using implicit feedback is proposed by comparing the temporal description of user selection processes and ratings. Models of such processes are formed using a set of weighted temporal rules that define the relationship in time between the moments when users select a given object. The method uses time-ordered input data. The method includes the stages of forming sets of weighted temporal rules for describing sales processes and creating ratings, calculating a set of ratings for these processes, and forming attack indicators based on a comparison of the ratings obtained. The resulting signs make it possible to distinguish between nuke and push attacks. The method is designed to identify discrepancies in the dynamics of purchases and ratings, even in the absence of rating values at certain time intervals. The technique makes it possible to identify an approach to masking an attack based on a comparison of the rating values and the received attack indicators. When applied iteratively, the method allows to refine the list of profiles of potential attackers. The technique can be used in conjunction with pattern-oriented approaches to identifying shilling attacks
ESTIMATING THE INFLUENCE OF THE WIND EXPOSURE ON THE MOTION OF AN EXTINGUISHING SUBSTANCE
Authors: Abramov Yuriy , Basmanov Oleksii , Krivtsova Valentina , Khyzhnyak Andrii
Published: September 2020

One of the tasks to be solved when deploying fire extinguishing systems is to determine the range of the fire extinguishing agent supply to the combustion center. This problem is solved using data on the trajectory of the fire-extinguishing agent in the combustion center. The presence of wind impact on the process of supplying a fire extinguishing agent will lead to a change in its trajectory. To take into account wind impact, it becomes necessary to assess the result of such impact. Using the basic equation of dynamics for specific forces, a system of differential equations is obtained that describes the delivery of a fire extinguishing agent to the combustion center. The system of differential equations takes into account the presence of wind impact on the movement of the extinguishing agent. The presence of wind action is taken into account by the initial conditions. To solve such a system, the integral Laplace transform was used in combination with the method of undefined coefficients. The solution is presented in parametric form, the parameter of which is time. For a particular case, an expression is obtained that describes the trajectory of the supply of the extinguishing agent into the combustion center. Nomograms are constructed, with the help of which the operative determination of the estimate of the maximum range of the fire-extinguishing agent supply is provided. Estimates are obtained for the time of delivery of a fire-extinguishing agent to the combustion center, and it is shown that for the characteristic parameters of its delivery, this value does not exceed 0.5 s. The influence of wind action on the range of supply of a fire extinguishing agent is presented in the form of an additive component, which includes the value of the wind speed and the square of the time of its delivery. To assess the effect of wind impact on the movement of the fire extinguishing agent, an analytical expression for the relative error was obtained and it was shown that the most severe conditions for supplying the fire extinguishing agent to the combustion center, the value of this error does not exceed 5.5%. Taking into account the wind effect when assessing the range of supply of a fire-extinguishing agent makes it possible to increase the efficiency of fire-extinguishing systems due to its more accurate delivery to the combustion center
Tensor network representations from the geometry of entangled states
Authors: Christandl Matthias , Lucia Angelo , Vrana Peter , Werner Albert H.
Published: September 2020

Tensor networks provide descriptions of strongly correlated quantum
systems based on an underlying entanglement structure given by a graph
of entangled states along the edges that identify the indices of the
local tensors to be contracted. Considering a more general setting,
where entangled states on edges are replaced by multipartite entangled
states on faces, allows us to employ the geometric properties of
multipartite entanglement in order to obtain representations in terms of
superpositions of tensor network states with smaller effective
dimension, leading to computational savings.
Seminario intervención social: un abordaje interdisciplinario para la planificación territorial y la gestión socio ambiental (Memorias)
Authors:   Universidad Católica Luis Amigó, Tobar Carreño Gloris Rocío
Published: September 2020

A modo de memorias, este texto reúne las ponencias del Primer Seminario intervención social para el abordaje de la planificación territorial y la gestión socioambiental, organizado por el programa de Trabajo Social de la Facultad de Psicología y Ciencias Sociales de la Universidad Católica Luis Amigó.
Organizational culture influenced by leadership styles: the case of private businesses in Kosovo
Authors: Shehu Lokaj Alma , Latifi Sadrija Thelleza
Published: September 2020

The characteristics and importance of leadership styles to organizational change are of particular importance for the development of organizational culture. This study aims to test leadership styles and the impact of the correlation between leadership style and organizational culture on the level of employees’ readiness across a range of leadership outcome measures. This study provides empirical evidence for the impact of leadership styles on organizational culture and vice versa. A questionnaire was distributed to 450 employees in private organizations in Kosovo. The obtained results show that organizational culture was a significant predictor for both transactional and laissez-faire leadership styles. Based on the dimensions of organizational culture concerning Kosovar leadership styles (transformational, transactional, laissez-faire), their mutual influence dominates more on one variable and less on any other variable as a measuring mechanism for outputs and their interpretation. The study will help the organizations’ leadership understand that their leading style influences the organizational culture and, as such, the employees’ performance. In Kosovo, the concept of organizational culture concerning Kosovar leadership has not been properly developed, and measures should be taken by private businesses to settle this issue.
Pulmonary vascular disease in Africa: Lessons from registries
Authors: Mocumbi Ana , Mastala Adjine , Guambe Phath , Dzudie Anastase
Published: September 2020

The epidemiology of pulmonary vascular disease (PVD) remains unclear in Africa, where health systems do not reach the majority of the population and heath information systems are poorly developed. In this context, registries are particularly important in gathering crucial information on PVD, aiming at improving knowledge of the epidemiology and/or quality of care. While population-based registries are the main tool to identify incident cases, and be a better indicator of pulmonary vascular disease burden, hospital-based registries can give an indication of the demand for specific care services, which is useful for health policy and planning.The only registry for pulmonary hypertension in Africa – the Pan African Pulmonary Hypertension Cohort (PAPUCO) – involved four countries, and was a pragmatic study that revealed a unique pattern of environmental risks, issues related to low access to health care,and ill-equipped health facilities for diagnosis and management of pulmonary hypertension. In addition, disease specific registries for conditions such as congenital heart disease and rheumatic heart disease uncovered high occurrence of PVD that can be managed and/or prevented with improvements in community awareness, surveillance, management and prevention.It is suggested that existing networks of experts and researchers develop regional registries to determine the epidemiology of PVD in Africa, assess geographic, environmental and seasonal differentials, as well as inform policy and care provision in the continent.
INFLUÊNCIA DO pH E TEMPERATURA NA QUANTIDADE DE COMPOSTOS BIOATIVOS EM FERMENTADO ALCOÓLICO MISTO DE MAÇÃ (Pyrus malus L.) E AMORA PRETA (Rubus sp.)
Authors: Machado Deise , Favero Diego Matos , Lima Kely Priscila de
Published: September 2020

Geralmente as frutas apresentam características adequadas para produção de bebidas fermentadas, desta forma, esses produtos devem ser bastante pesquisados e incentivados. A maçã (Pyrus malus L.) e a amora preta (Rubus sp.) são frutas cultivadas em Palmas (PR) pelo seu ótimo desenvolvimento no frio. Assim, o objetivo deste trabalho foi produzir um fermentado misto de maçã e amora preta propondo então, uma nova possibilidade de renda para os produtores dessa região. Foram produzidos quatro fermentações para verificar a interação entre dois fatores o pH (3,5 e 3,9) e a temperatura (25 °C e 30 °C), utilizando um delineamento fatorial inteiramente casualisado, 22. Posteriormente foi quantificado seus compostos bioativos como as antocianinas, atividade antioxidante total e fenólicos totais e realizado algumas analises físico-químicas como o teor alcoólico, calorias, densidade e teor de sólidos solúveis utilizando o equipamento Alcolyzer Beer. E empregando o software “Statistica 10” foram obtidas a análise de variância, diagrama de Pareto e superfície de resposta, para todos os resultados obtidos. Desta forma foi possível observar que apenas as antocianinas tiveram diferença estatística, sendo que o parâmetro pH apresentou influência negativa na quantidade delas. Assim, se esse fermentado for reproduzido preferencialmente deverá ser realizada sua fermentação na temperatura de 30°C e pH inicial de 3,5 ou ligeiramente abaixo para manter as antocianinas no produto.
ANÁLISE DA COBERTURA DA TERRA NA PAISAGEM DO GUARAGUAÇU - PONTAL DO PARANÁ/PR
Authors: Uyetaqui Bruno Heidy , Da Silva Daniele Borges , Tonetti Emerson Luis , Haliski Antonio Marcio
Published: September 2020

O presente trabalho utiliza do programa Google Earth Pro®, com imagens atualizadas em 2019, para fazer a análise de cobertura da terra em uma área central da comunidade do Guaraguaçu (Pontal do Paraná - PR) de 867.712 m². A delimitação do espaço ocorrera devido ao maior adensamento populacional estar localizado nas proximidades da estrada que liga a região de Paranaguá (maior município do litoral Paranaense) às praias, neste caso, o município de Pontal do Paraná. Desta forma, possibilita-se uma caracterização do desenvolvimento territorial local da região através do estudo da paisagem. Como o espaço estudado, é circundado por Área de Preservação Permanente e Unidades de Conservação, como o Parque Estadual do Palmito, a maior parte da localidade é coberta de espaços sem edificações, o que oferece aos seus habitantes uma boa qualidade ambiental e de vida, apesar da inserção industrial de duas fábricas neste espaço. Tal proposta possibilita um planejamento socioambiental que pode servir de base de consulta pela sociedade, devido à facilidade de acesso ao software ou as disponibilidades das imagens presentes em outras ferramentas de livre acesso relacionadas à empresa Google, como o Google Maps, desde que ocorra um incentivo adequado ao uso desta tecnologia para quem se pretende ofertar este tipo de esclarecimento, o que pode contribuir como um fator da participação popular nos planos diretores da região.
EFICIÊNCIA PRODUTIVA DA CANA-DE-AÇÚCAR NA BACIA DO ALTO PARANAPANEMA
Authors: Benfica Maikon Renan de Almeida , Nassif Daniel Silveira Pinto , Carraro Nilton Cezar , De Oliveira Edenis Cesar
Published: September 2020

Com a expansão da cultura da cana-de-açúcar no cenário nacional e internacional, impulsionaram-se pesquisas relacionadas ao seu crescimento e desenvolvimento em diferentes locais do globo. Estes estudos, muitas vezes são onerosos e demandam de diversos anos para serem concluídos. Para tanto, cada vez mais os modelos de produtividade de culturas vem sendo utilizados. O objetivo do presente trabalho foi o de avaliar o crescimento e desenvolvimento da cultura cana-de-açúcar na região da bacia do Alto do Paranapanema baseado em índices biométricos da cultura para as safras de até 2008/09 até 2017/18 baseadas no modelo das Zonas Agroecológicas do boletim da FAO 33. Os resultados da pesquisa apontam para uma região com produtividade atingível acima da média do estado de São Paulo, chegando a 112 Mg ha-1 em um comparativo histórico de 9 safras, com eficiência produtiva entre 61 e 86%. A região estudada demonstrou ser de grande potencial produtivo para a cultura da cana-de-açúcar como alternativa à produção agrícola.
Development of nitride-sensors for monitoring in control systems
Authors: Krishan Monzer , Alkhawaldeh Ahmad , Soliman Abdel-Hamid
Published: September 2020

Sensors become integrated through the control condition arrangement, either for visual, mechanical, biological, or chemical applications. New stuff is designed for detection, such as Diluted Magnetic Semiconductors (DMS), which are considered attractive candidates that consist of traditional 111- V, II-VI, or group IV semiconductors. Manganese Mn-doped GaN (Mn.Gac.N) epitaxial velum has unique magnetic, visual and chemical properties for the control of systems intelligently in detector design. The subject area of the magnetic properties of MnxGal-xN is on a large scale available; there are only a few studies on the visual properties and electrochemical properties of MnxGal-xN epitaxial velums. Where MnGaN velums were used in spintronic and opto-electronic applications according to their magnetic characterization and constructed MnGaN electrodes have drop-fabric potentials for potentiometric sensor applications, since they have good performance as ion-selective electrodes. The electrical and magnetic properties that allow the control of electron spin as well as compliant period, makes the materials ideal for spintronic applications. Designing such spintronic and optoelectronic devices based on MnxGal-xN requires a broader agreement of physical, visual, electrical and chemical properties of epitaxial velums that are still seldom found in the literature. This bailiwick displays the potential use of MnGaN semiconductor as an all solid-state potentiometric sensor for measuring anions in solutions in the control-engineering field.
Stress analysis of the discs of axial-flow microturbines
Authors: Baginski Pawel , Zych Pawel , Zywica Grzegorz
Published: September 2020

The article discusses the mesh creation techniques for models of discs of axial-flow microturbines. A universal method of optimization of such devices, in terms of their strength improvement, has been proposed. The research focused on microturbines that can operate in combination with ORC systems, especially the ones whose discs have many structural components such as pins or chamfers. Calculations were done using the commercial software ANSYS Workbench. Both tetrahedral and hexahedral grids were used in the analysed models. The calculation time needed for the grid preparation was regarded as an important parameter. Therefore, the reference model was created using the disc slice method. The results obtained for the models that included the full complex geometry of the disc were compared with the results obtained for the reference model. The mesh size coefficient was defined. It enabled to simplify the strength optimisation method for discs of axial-flow microturbine and also made it more universal. After carrying out all analyses and computations, it was possible to develop a scheme of conduct during the optimization of the aforementioned expansion devices.
Partial field decomposition using particle velocity references
Authors: Jing Wen-Qian , Wu Hua-Wei , Nie Jin-Quan
Published: September 2020

In existing partial field decomposition methods, the pressures are generally used as references. This paper is going to use the particle velocities as the references to decompose the sound field radiated by incoherent or partially coherent sources into mutually incoherent partial fields, and evaluate its performance by comparing with the method using pressure references. Both numerical simulations and experiment confirm the effectiveness of the method using particle velocity references for partial field decomposition and demonstrate its superiority over the method using pressure references, and it is also shown through numerical simulations that the particle velocity references almost always perform better than the pressure references as long as the references are located close to the sources and the directions of particle velocity references are perpendicular to the source plane as far as possible.
A road quality classification technique based on vehicle system responses with experimental validation
Authors: Dang Xiaozheng , Zhou Liangsheng , Wei Xiaojun , Wang Yushuai
Published: September 2020

Aiming at estimating the road surface condition with improvement of the accuracy in spatial, this paper proposes a new method to classify road surface condition by considering identification interval based on vehicle system responses. First, the response signals in different vehicle speeds are decomposed by using both Wavelet Transform (WT) and Empirical Mode Decomposition (EMD) techniques. Then characteristics of the signals in both the time and decomposed frequency domain are subsequently extracted. An Improved Distance Evaluation Technique (IDET) is used to select superior features from the characteristics. Finally, a Support Vector Machine (SVM) classifier is applied to determine the road classification. The influences of identification intervals in spatial accuracy are discussed, and an adaptive classification interval was proposed to improve accuracy. The algorithm is validated by using both simulation and experimental results.
A novel wind turbine gearbox fault diagnosis method based on ASO-VMD and NRF
Authors: Shan Mengchen , Liu Wenyi
Published: September 2020

The combination of feature extraction and pattern recognition can make it possible to realize wind turbine gearboxes based on vibration signals. However, these methods need to be constantly adjusted parameters and spend time training when processing different vibration signals, which is time-consuming. Aiming at reducing the number of parameters that need to be adjusted and training time, this paper proposes a variational mode decomposition (VMD) based on atomic search optimization (ASO) and neural random forest (NRF) fault diagnosis model. The parameters of the VMD are adaptively adjusted by the ASO, which has the advantages of less adjustment parameters. After ASO-VMD decomposition, signals will be used as the input of NRF. We evaluate our method on simulation gearbox model which is established by Solidworks and Adams. Experimental results show that our method has faster training speed and higher recognition accuracy without set many parameters manually.
Design of a self-tunable, variable-length pendulum for harvesting energy from rotational motion
Authors: Abbas Hassan Suzzan , Osman Tarek , Khattab Aly , Arafa Mustafa , Abdelnaby Mohammed Ali
Published: September 2020

In this paper, a self-tunable energy harvester based on pendulum oscillations with a mechanical motion rectifier (MMR) system, which can convert vibration into electrical energy, is proposed. The harvester is composed of a pendulum excited by a slider-crank mechanism. The pendulum system is designed to automatically adjust its own natural frequency to match that of the imposed base excitation. Frequency adjustment in a proposed pendulum-type energy harvester is achieved by varying the length of the pendulum rod through changing the position of pendulum mass which mounted at its tip. The pendulum mass is driven by a ball screw through a stepper motor which controls the length of the pendulum automatically in accordance with the frequency of the external motion. The base motion frequency is detected by an infrared sensor. An ultrasonic distance sensor is used to detect the length of the pendulum rod and feeds this information to a microcontroller to obtain the corresponding natural frequency from a lookup table. The microcontroller calculates the frequency difference between natural frequency and excitation frequency and converts this value into a length difference through another lookup table. The microcontroller then gives instructions to drive a stepper motor through a sequence of steps to achieve the target length and keeps the device in resonance state to harvest maximum power during operation. Different time detection intervals were studied to investigate their effect on the tuning process. This study showed that the longer time intervals increase the detection accuracy for the calculation of low excitation frequency. The amount of energy consumed during the tuning process to adjust the pendulum length is presented. In this context, the consumed energy is only needed until the resonance of the device matches the excitation frequency. The harvester system was studied numerically and experimentally. Based on the findings of this work, the natural frequency of the harvester is successfully tuned below 0.7 Hz, when the length of pendulum rod is changed from 550 mm to 900 mm, generating power from 1.78 W to 4.1 W at an optimal load resistance value of 10 Ω and 3 Ω respectively at maximum excitation amplitude of 120 mm. Therefore, the proposed pendulum system can be used as an efficient harvester for producing power in low-frequency applications (< 1 Hz).
Improving the hydrological performance of a rainwater for drinking (RFD) system at a rural hospital in Vietnam
Authors: Bak Gippeum , Dao Anh Dzung , Han Mooyoung
Published: September 2020

Rainwater harvesting has been recognized as an alternative water supply method with many environmental benefits. This method can also produce drinking water for people who cannot access safe water resources. In this study, we evaluate the newly developed rainwater for drinking (RFD) system built at Ly Nhan Hospital in Vietnam. Most evaluation methods are not suitable for the RFD system because they focus on given conditions and overlook the potential of the system via operation and management practices. The hydrological performance was evaluated based on the system supplying drinking water sustainably, with zero no water days and a rainwater utilization ratio of 22%. Methods for improving performance indicators under adverse conditions were determined using sensitivity analysis and include increasing catchment area and tank volume and maximizing water use by utilizing rainwater overflow. Among them, an additional tank should be prioritized considering the cost, or it can be replaced by a plastic bag. The RFD system can be designed based on system monitoring data despite a lack of daily rainfall data and unexpected changes in the conditions. Appropriate regional RFD guidelines can be established with the continued evaluation of the RFD system worldwide.
Impact of mental models on constructed wetland maintenance in semi-arid India
Authors: Friedrichsen Claire N. , Monroe Martha C. , Daroub Samira H. , Stepp John R. , Wani Suhas P.
Published: September 2020

Constructed wetlands (CWs) are a low-cost technology relying on natural processes to treat wastewater and provide a decentralized wastewater treatment option in communities with limited infrastructure. Little is known about their long-term maintenance or monitoring, or the experience of communities who adopt and maintain CWs. This research uses mental models to compare the perspectives of scientists and community members regarding CW maintenance. Forty-three semi-structured interviews with farmers, maintainers, local politicians, CW neighbors, extension agents, and scientists in four villages in south India were conducted. Differences in their mental models reveal the importance of understanding CW ecology, the connection between CW maintenance and treated effluent water quality, and how to monitor and maintain the CW. The results contradict the commonly accepted idea that CWs are a simple technology that is easily maintained. CWs are complex and their complexities need to be factored into decision-making related to choosing what WW treatment is most appropriate in the rural communities for which they are being considered. The study's results highlight the need for radical re-design of CWs so they do not need maintenance or can be maintained intuitively by community members.
A monitoring model for the stress on a super-high arch dam during pre-impoundment construction
Authors: Niu Jingtai , Luo Xiang , Deng Zhiping , Zhang Yang , Guo Yingjia , Wang Zhiqiang
Published: September 2020

This paper presents a proposed model for monitoring the stress on a super-high arch dam during construction. Using mathematics, mechanics, and dam engineering principles, the mathematical expressions of the self-weight component of the dam prior to and following the sealing of the bottom of the arch were derived. The visco-elastoplastic constitutive model of dam concrete during construction was identified and used to develop a stress monitoring model for a super-high arch dam. Based on in-situ stress monitoring data collected during the construction of a super-high arch dam, the stress monitoring model was applied to a super-high arch dam accounting for future impoundment, and the key components of the monitoring model were isolated. The results show that the model has high fitting accuracy and incorporates an appropriate selection of factors affecting dam stress. The hydrograph of each component conforms to the structural characteristics of super-high arch dams during construction. This model overcomes the limitations of applying the complete self-weight of the dam body on the cantilever beam and was validated using data from a super-high arch dam construction project. Thus, this paper provides evidence for a safety monitoring model for super-high arch dams during construction.
Starożytne źródła antropocentryzmu
Authors: Ganowicz-Bączyk Anita
Published: September 2020

Anthropocentrism seems to be a key notion related to the man-nature relation. Probably he is also the most controversial one in environmental ethics. The anthropocentric attitude is sometimes meant to be the main cause of the ecological crisis. One can distinguish at least several stages of the process, which led to this crisis, namely: stage of Magic and Myth, Ancient Times, Middle Ages, and Modern Times. The aim of this article is to show the process of development of an anthropocentric thought in Ancient European culture. Supposedly the critical phase for this process is the so-called Neolithic Revolution. Changes brought by this deeply influenced life of man. Not only affected the transformation of his world-view but also had an impact on the modification of society itself. Mentioned changes led among other things to the rejection of magic and mythical world-view, in which the Universe was perceived as a harmonious and friendly place to live in. A doubt appeared instead, what the place of man in the world really is. These questions reflected in philosophical views of that time. To sum up, the originated by Ancient Greek philosophers outlook on nature, in which nature was recognized as a living organism and a man as an immanent part of it, had been gradually dropped out. It appeared that man falls outside the mechanical laws of nature because he is able to understand them and use this knowledge for his own goals (Democritus), man’s soul makes him transcend nature and dominate it (Socrates), man’s existence is purposeful, he is superior to other material beings as a crown of nature and the most complex and perfect being (Aristotle). This process led to a recognition of the objective existence of the world, which in fact is independent of human cognition. Ultimately, this resulted in the objectification of nature as an object of man’s cognition and research. Nature was then gradually put in opposition to man – the subject of cognition.
Eko – kultura jazdy samochodem
Authors: Klimska Agnieszka , Klimski Marcin
Published: September 2020

Artykuł porusz kwestię eco-drivingu - propozycji zmiany stylu prowadzenia samochodu na bardziej ekonomiczny i szanujący naturalne środowisko. Wskazano założenia, których przestrzeganie prowadzi do redukcji zużycia paliwa, a przez to do zmniejszenia kosztów i zachowania środowiska. Poprawa kultury jazdy dzieki idei eco-drivingu może być jedną z metod nieformalnej edukacji ekologicznej.
Organizational Commitment Impact On Performance: Research on Polsek Kotagede Polresta Yogyakarta Member
Authors: Wahyuningsih Endah Sri
Published: September 2020

This research purposed to examine the significance effect of organizational commitment on individual performance, especially national polce member. Polri's performance is determined by several factors, situations and has relationship between corps. Bad corps' performance will impact the performance of the other corps .For intensify performances, many things can be done. One of them is organizational commitment. Organizational commitment has a relationship in improving performance. The higher the organizational commitment, the higher the level of performance, and the lower the organizational commitment, the lower the level of performance. The Research subject are all of Kotagede Police Members Yogyakarta (59 people). Data collection method that researcher used is spread the scale which contains statements about organizational commitment variables, whereas for performance variables researcher use performance data of the National Police's members of the Kotagede District Police of Yogyakarta. For the data analysis method, researcher used simple analysis with  help of SPSS 21 statistical program. The results of the study have a convincing influence between organizational support and organizational commitment simultaneously on the performance of Polri members. the effect of organizational commitment is stronger than organizational support for performance. So, the performance of the national police organization, are determined by organizational commitment and perceived organization's support, both simultaneously or partially.
Involvement of Fathers in Parenting as a Predictor of Adolescents' Social Adaptation
Authors: Kusumasari Nadia Miranti
Published: September 2020

The purpose of this study is to determine the effect of father's involvement towards social adjustment in adolescent. This study uses quantitative approaches with the type of survey research. The population of this study are 437 students of 7th and 8th grade at MTs Negeri 1 Yogyakarta with 211 students as a sample which determined by simple random sampling technique. Data was collected by using father’s involvement scale and social adjustment scale. Validity in the scale of this study used content validity carried out by expert. Reliability in the scale of this study used Alpha Cronbach reliability coefficient of 0,951 on the father’s involvement scale and 0,905 on the social adjustment scale. As for data analysis, descriptive analysis and simple linear regression analysis are used. The results of this study showed that father’s involvement has a significant contributed 27,1% towards social adjustment in adolescent (F = 77,672; p = 0,000 < α 0.05). As for the line of regression equation obtained is Y = 47,789 + 0,289X.