bluuebunny/crossref_metadata_2025 huggingface dataset:
An improved energy management control strategy for a standalone solar photovoltaic/battery system
Authors: Chekira Ouadiâ , Boharb Ali , Boujoudar Younes , El Moussaoui Hassan , Lamhamdi Tijani , El Markhi Hassane
Published: July 2022

This paper proposes efficient energy management in hybrid microgrid-comprising of photovoltaic (PV) and battery storage systems. The proposed technique. The hybrid system's power balance is based on smart control to meet the demands of isolated off-grid direct current (DC) loads as well as to stabilize the voltage to DC Bus. The Perturb and Observe technique (P&O) is used to achieve maximum power point tracking by adjusting the duty cycle of the Bidirectional converter, which links the Li-ion battery to the DC Bus of stand-alone power systems (SPS). The proposed controller regulates the power flow of the battery for efficiency voltage control in a microgrid. The energy management system proposed has been approved using MATLAB/Simulink under variable solar irradiation conditions. The simulation results show that the technique used increases the battery cycle-life and better energy management and voltage control performance compared with previous examples.
Potential development of an optical sensor to determine the quality of heated palm cooking oil
Authors: Salleh Wan Shafiq , Shaipuzaman Nurulain , Najib Muhd Sharfi , Salim Mohd Rashidi , Manap Hadi
Published: July 2022

Palm oil is an edible vegetable oil yielded from the mesocarp of the palm oil’s fruit. It is commonly used as cooking oil as compared to other cooking oil such as olive or coconut oil because it is inexpensive and has high oxidative stability when used for frying. However, after frequent frying, the oil undergoes some physical and chemical reactions which affect the quality. This leads to the formation of compound that is dangerous to human body which is called free fatty acid (FFA). Therefore, a measurement device needs to be developed to determine the quality of heated cooking oil. In this paper, a spectroscopy study using an open-path method which focus on the palm cooking oil is proposed to examine the reaction of palm oil upon prolonged heating process. Open-path method is a technique where the incident beam will travel through the sample (palm oil) before it is detected by a spectrometer. The result shows that the FFA samples have the optimum absorbance peak at the UV wavelength 339.15 nm and each prolonged heated oil show different absorbance value. Hence, there is a potential to develop an optical sensor to determine the quality of the heated cooking oil.
The effects of SiO2@Y2O2S:Eu3+ phosphor on the optic characteristics of white light-emitting diodes
Authors: Liem Bui Van , Xuan Le Phan
Published: July 2022

The study investigated the effectiveness of coating silica nanoparticles (SiO2) and resin-silica nanocomposites poly methyl methacrylate (PMMA)-silicaover the surface of Y2O2S:Eu3+ red phosphors. The purpose of this surface coating is to enhance the optical properties, including the photoluminescence (PL) and long-term stability, of Y2O2S:Eu3+. Two methods used to coat the phosphor with 5-mm silica nanoparticles are dip-coating and sol-gel (Stöber) methods. SiO2 nanoparticles were formed via hydrolysis and condensation reactions, while radical polymerization was performed to fabricate the poly (1-vinyl-2-pyrrolidone). The Y2O2S:Eu3+ surface coating of PMMA-silica composite was performed via two reactions. One is the reaction of SiO2 nanoparticles with methyl methacrylate (MMA) monomer, and the other is MMA-tetraethyl orthosilicate (TEOS) reaction. The results showed that by using the latter method, Y2O2S:Eu3+ yielded better PL and long-term stability. Additionally, surface coating with the PMMA-SiO2 nanocomposite using the second technique resulted in 5% enhancement in PL and stabilized the cathode luminescence (CL) intensity of Y2O2S:Eu3+, compared to those properties of uncoated Y2O3S:Eu3+ phosphor particles.
The impacts of (Ba,Sr)3BP3O12:Eu2+ on the luminous flux of phosphor-converted-white light emitting diode packages
Authors: Liem Bui Van , Nguyen Thi Dieu An
Published: July 2022

The use of (Ba,Sr)3BP3O12:Eu2+ in the remote phosphor structure has been proposed and analysed to offer significant improvement to the lighting performance of the phosphor-converted white light emitting diode (LED). The phosphor emits green and blue spectra centred at 520 nm and 465 nm, respectively. Thus, the phosphor can compensate the blue and green light energy components in the white-light spectral band, helping to enhance the luminous efficiency and colour uniformity of the dual-layer remote phosphor package. The increase in (Ba,Sr)3BP3O12:Eu2+ however is not advantageous to the colour rendering index because of the lower red emission. The backscattered and back-reflected lights are degraded when the (Ba,Sr)3BP3O12:Eu2+ phosphor layer appears in the structure. The stable chromaticity and luminous flux at good values are observed when 10% weight percentage of (Ba,Sr)3BP3O12:Eu2+ is applied.
Effect of chaos factor in radiation pattern in planner antenna arrays with chaos adaptive invasive weed optimization
Authors: Rajitha Datla , Karunakar Godi
Published: July 2022

For mobile communication and spatial detection of antennas should have high directive radiation pattern, in this context pattern synthesis of planar circular antenna arrays is highly significant such design has been done inverse weed optimization. The basic objective e is to study invasive weed optimization in compression with modified chaotic adaptive invasive weed optimization. The focus of the study is the effect of chaotic factors suitable for sinusoidal mapping for chaos as applicable to the context of the design of antennas. Taking various numbers of elements of the antenna and the distance between the antenna’s radiation patterns are studied by varying chaos factors through MATLAB programming. It is found that the critical point of 2.3 for chaos factor makes the map enter into phase of chaos prior to the critical point is a phase of periodicity starting with chaos factor of 2. Below this value there is no chaos but a phase of convergence. These phases are useful having a trade of convergence and chaos. By varying the factor of chaos the impact on the radiation factor of non-uniform planar antennas has been found to give phases of convergence of chaos which are essential for making trade of between exploitation and exploration required in optimization.
Selection of Gd2(WO4)3:Tb3+ for inproving color deviation in white light-emitting diodes
Authors: Nguyen Thi Dieu An , Quoc Anh Nguyen Doan , Xuan Le Phan
Published: July 2022

This study successfully using the hydrothermal technique to synthesize Gd2(WO4)3:Tb3+ phosphors when subjected to calcination under the temperature of 900°C. Here are some aspects that were thoroughly examined: the crystal formation, photoluminescence, photoluminescence excitation, as well as fluorescent degradation for the samples. The (Gd2-xTbx)(WO4)3 (x=0.01-0.15) phosphors exhibit a bright discharge of green under 547 nm (5D4→7F5 shift for Tb3+) when excited at 270 nm (4f8→4f75d1 shift for Tb3+). Because of the exchange interaction between Tb3+, the quenching concentration was determined to be around 10%. The addition of Tb3+ had no effect on the (Gd2-xTbx)(WO4)3 phosphors' CIE chromaticity coordinates (~0.33±0.02, ~0.60±0.02) or color temperatures (~5542 K). Nevertheless, when the Tb3+ content increased, the fluorescence lifespan for 547 nm emission reduced due to energy transfer between Tb3+. The strong green emission from Gd2(WO4)3:Tb3+ phosphors is a potential element for WLEDs and display areas.
Color-adjustable phosphors Sr4La(PO4)3O:Ce3+,Tb3+,Mn2+ impact on luminescence of white light-emitting diodes
Authors: Nguyen Thi My Hanh , Xuan Le Phan
Published: July 2022

We used the ceramic approach to synthesize a sequence of Sr4La(PO4)3O:Ce3+,Tb3+,Mn2+ within our study. Especially, the attributes of Sr4La(PO4)3O that were extensively investigate are luminous characteristics, thermal stableness, and energy transfering from Ce3+ to Tb3 and Mn2+.Through energy transfer, sensitizer Ce3+ ions can considerably boost the fragile green radiation from Tb3+ and red radiation from Mn2+. The color of the radiation can be changed by adjusting the Ce3+/Tb3+ and Ce3+/Mn2+ ion ratios. The Sr4La(PO4)3O: 0.12Ce3+, 0.3Mn2+ specimen produced white light having hue coordinates of (0.3326, 0.3298). According to this result, it shows that Sr4La(PO4)3O:Ce3+,Tb3+,Mn2+ might be used in white light-emitting diodes (WLEDs).
Application of (Ca1-xSrx)LaGa3S6O:Eu2+ phosphor in white light-emitting fabrication
Authors: Nguyen Thi Dieu An , Xuan Le Phan
Published: July 2022

An alternating sequence of Ca1-xSrxLaGa3S6O:0.05Eu2+ phosphors was produced using high-thermal and solid-state reactions. It has outstanding excitations at the range between 350 and 500 nm suitable for the close-ultraviolet or GaN-based blue LED chips. These phosphor peaks have a blue shift between 560 and 540 nm when the Sr concentration (x) rises. The Sr content (x) can be modified to produce an illumination with a color between yellow and green. As a result, we can conclude that solid solutions Ca1-xSrxLaGa3S6O:0.05Eu2+ are excellent for use in manufacturing white LEDs. Our data may become valuable for producers in the task of making white light emitting diode (WLED) devices suitable for them.
Utilizing a strait-range green phosphor γ-AlON:Mn,Mg for the task of achieving a super-broad hue gamut display
Authors: Nguyen Thi My Hanh , Xuan Le Phan
Published: July 2022

The screen backlighting produced by green β-sialon:Eu, as well as red K2SiF6:Mn phosphors, have an extremely expansive hue gamut that encompasses the majority of the national television system committee (NTSC) triangle. For our research, a substitute phosphor in green would be probed in terms of improving the screen hue range even further. The phosphor γ-AlON:Mn,Mg appears to be green in color with a smaller radiation band of colors than sharp β-silaon:Eu. By replacing γ-AlON:Mn,Mg with β-sialon:Eu, the screen hue range in the blue-green area is significantly expanded. In both the CIE 1931 and CIE 1976 hue spaces, the hue range of screens with γ-AlON:Mn,Mg, and K2SiF6:Mn entirely surpasses the NTSC benchmark. Furthermore, the stability of LEDs emit white light using γ-AlON:Mn,Mg appears to be similar to LEDs that utilize β-sialon:Eu.
The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode
Authors: Dang Huu Phuc , Ton That Phung , Xuan Le Phan
Published: July 2022

A solid-state process was used to generate the green phosphor Ca3Si2O4N2:Eu2+. The luminescence characteristics, dispersed reflection spectra, and heat quenching were investigated initially, followed by the white light emitting diodes (wLED’s) manufacture by the Eu2+ stimulated Ca3Si2O4N2 phosphor. Based on the concentration of ion Eu2+, a wide green emission range localized between 510 and 550 nm was seen in Eu2+ -doped Ca3Si2O4N2. In Ca3Si2O4N2, the best doping concentration of Eu2+ was 1 mol%. An electric multipolar interaction process conveys energy among Eu2+ ions, with a necessary conversion distance of around 30.08 Å. Blending a near-ultraviolet (n-UV) light emitting diodes (LED) which has a GaN basis (380 nm) with the blue BaMgAl10O17:Eu2+, the green  Ca3Si2O4N2:Eu2+, and the red Ca3Si2O4N2:Eu2+ phosphors yielded a wLED with a 88.25 color-rendering indice Ra at 6029 K correlating color temperature.  Ca3Si2O4N2:Eu2+ appears to be a promising option to apply as a converting phosphor in wLED applications.
Routing protocols for hybrid wireless networks: a brief review
Authors: Husam Mahdi Miaad , Adel Ibrahim Ibrahim
Published: July 2022

Hybrid wireless networks (HWNs) are resulted from the integration of a mobile Ad hoc networks (MANET) and an infrastructure wireless networks. These networks have received increasing interest from researchers for their superior performance and reliability. Packet routing protocols in hybrid wireless networks are important to increase the capacity and scalability of these networks, therefore, several routing protocols have been proposed. Routing protocols in HWNs are designed and implemented from combining the cellular transmission mode with the Ad hoc transmission mode. To route a message to the intended recipient of the sender, hybrid wireless networks use multi-hop technology. However, the source node needs relay nodes, which may be either adjacent nodes or base stations depending on set of parameters like bandwidth, load balancing, or the nearest node. This paper explores routing protocols for hybrid wireless networks and the techniques to enhance the security, performance, and capacity of these routing protocols.
A novel singular value decomposition-based ultra wide band time-of-arrival estimation for multiple targets
Authors: Yassine Nouali Ibrahim , Slimane Zohra , Abdelmalek Abdelhafid
Published: July 2022

It is widely admitted that the estimation of ultra wide band (UWB) time-of-arrival (TOA) for multiple targets in indoor multipath channels is a very challenging task. The existing algorithms deal with a limited number of targets and require a complex exchange of several messages. In this paper, a novel TOA estimation algorithm for multiple targets is developed. The proposed algorithm estimates the first path (FP) TOA of a number of targets without exchanging messages or using collision avoidance techniques. As a first step, the singular value decomposition (SVD) is employed to extract the first path (FP) of each target and then a matched filter, followed by an iterative threshold crossing algorithm, is used to determine the number of targets and the corresponding FP TOAs. The simulation results with four targets, using the CM1 IEEE 802.15.4a channel model, showed that the proposed novel algorithm can effectively detect the FP of each target and estimate its corresponding TOA.
Design a sturdy and secure authentication scheme capable of early detection of COVID-19 patients using WBANs
Authors: Aldarwish Abdulla J. Y. , A. Yassin Ali , Mohammed Rashid Abdullah , Alasadi Hamid Ali Abed , Adel Yaseen Aqeel , Thabet Khalid Eman
Published: July 2022

COVID-19 was first reported in China Wuhan and rapidly grown up to more than 58 countries based on the World Health Organization (WHO). Well ahead of any health emergency, the health care server has the ability to access these data via authorization and then s/he performs necessary actions. In order to protect medical data from malicious activities, authentication is the starting point for this. Authentication systems represent a network support factor to reduce ineffective users and radically eliminate phishing because authentication determines the identity of the real user. Many schemes and technologies have been suggested for authentication in wireless body area networks (WBANs). In this paper, we suggest a strong dynamic password authentication system for WBANs. We adopt a (different/new) way to calculate a password and make it coherent and dynamic for each login session. Our work also provides additional security properties to get rid of hub node impersonation attacks and resolve key escrow issues. Our scheme resist fishing attach which keep patient from any illegal change of drugs. By comparison, the proposed scheme is considered active and has strong security based on formal security analysis tools such as AVISPA.
Detecting face mask using eigenfaces and vanilla neural networks
Authors: Sharma Raghav , Krishnakumar Shridevi S. , Seshan Abishek , Rajotia Manan
Published: July 2022

Coronavirus has become one of the most deadly pandemics in 2021. Starting in 2019, this virus is now a significant medical issue all over the world. It is spreading extensively because of its modes of transmission. The virus spreads directly, indirectly, or through close contact with infected people. It is proclaimed that people should wear a mask in public areas as a counteraction measure, as it helps in suppressing transmission. A portion of the spaces, where the virus has broadly fanned out, is because of inappropriate wearing of facial cover. In crowded areas, keeping a check on facial masks manually is difficult. To automate this process, an effective and robust face mask detector is required. This paper discusses a hybrid approach using a machine learning technique called eigenfaces, along with vanilla neural networks. The accuracy was compared for three different values of principal components. The test accuracy achieved was 0.87 for 64 components, 0.987 for 512 components, and 0.989 for 1,000 components. Hence, this approach proved to be more promising and efficient than its counters.
Enhancement Of Gale-Shapley algorithm with imbalanced sets for hiring and job finding applications
Authors: D. Mendoza Arnin Aaron , Barbosa Leila Jorg C. , A. Cortez Dan Michael , M. Dioses Raymund , A. Agustin Vivien , C. Regala Richard
Published: July 2022

In this paper, we discuss a modification to the Gale Shapley algorithm in this study. We concentrated on how the modified algorithm would operate if the data sets for men and women were not equal. We showed how to measure the average energies of men and women with equal and unequal sets, how the new design of the algorithm will benefit both parties by duplicating sets of data to fill the unequal sets of data, resulting in an equal set of pairings, and how to measure the average energies of men and women of the new algorithm in this paper. Having stated that, each couple will have a stable partner and/or will be queued to the algorithm's suggested stable partner.
Comparison of principal component analysis and ANFIS to improve EEVE Laboratory energy use prediction performance
Authors: Desmira Desmira , Abu Bakar Norazhar , Wiryadinata Romi , Abi Hamid Mustofa , Kholifah Nur , Nurtanto Muhammad
Published: July 2022

The energy use that is in excess of practicum students’ needs and the disturbed comfort that the practicum students experience when conducting practicums in the Electrical eengineering vocational education (EEVE) laboratory. The main objective in this study was to figure out how to predict and streamline the use of electrical energy in the EEVE laboratory. The model used to achieve this research’s goal was called the adaptive neuro-fuzzy inference system (ANFIS) model, which was coupled with principal component analysis (PCA) feature selection. The use of PCA in data grouping performance aims to improve the performance of the ANFIS model when predicting energy needs in accordance with the standards set by the campus while still taking students’ confidence in conducting practicum activities during campus operating hours into consideration. After some experiments and tests, very good results were obtained in the training: R=1 in training; minimum RMSE=0.011900; epoch of 100 per iteration; and R=0.37522. In conclusion, the ANFIS model coupled with PCA feature selection was excellent at predicting energy needs in the laboratory while the comfort of the students during practicums in the room remained within consideration.
A recommendation system of training data selection method for cross-project defect prediction
Authors: Sinaga Benyamin Langgu , Ahmad Sabrina , Abas Zuraida Abal , A. Jalil Intan Ermahani
Published: July 2022

Cross-project defect prediction (CPDP) has been a popular approach to address the limited historical dataset when building a defect prediction model. Directly applying cross-project datasets to learn the prediction model produces an unsatisfactory predictive model. Therefore, the selection of training data is essential. Many studies have examined the effectiveness of training data selection methods, and the best-performing method varied across datasets. While no method consistently outperformed the others across all datasets, predicting the best method for a specific dataset is essential. This study proposed a recommendation system to select the most suitable training data selection method in the CPDP setting. We evaluated the proposed system using 44 datasets, 13 training data selection methods, and six classification algorithms. The findings concluded that the recommendation system effectively recommends the best method to select training data.
Elementos de fachada com características fractais: processo de projeto paramétrico e seu consequente comportamento à luz do dia
Authors: Mariano Pedro Oscar Pizzetti , Pereira Alice Theresinha Cybis , Mallmann Gabriela Pinho
Published: July 2022

Esta pesquisa trata do desenvolvimento de um processo paramétrico para a aplicação de padrões geométricos fractais em elementos arquitetônicos de fachada. Tendo como objetivo desenvolver e avaliar um processo de projeto que possibilite gerar componentes de fachada com características da geometria fractal linear, organizá-los conforme a radiação incidente e verificar a complexidade de sua composição por meio da dimensão fractal. Para isso um processo paramétrico e generativo foi construído em uma ferramenta de programação visual e plug-ins, seguindo um modelo de performance adaptado. Como resultado é possível identificar e verificar o comportamento da luz do dia nos ambientes internos, consequente da escolha do padrão fractal linear da composição organizada a partir da radiação e do entorno urbano utilizado. Na sequência, com base nos resultados, foi desenvolvida uma correlação entre as composições e o entorno urbano, demonstrando que a utilização dos controladores possibilita que a luz do dia no interior seja controlada pelo projetista, distribuindo a luz independente da verticalização do entorno urbano.
Gestão de projetos no ramo da arquitetura e construção: revisão sistemática dos métodos, artefatos e seus benefícios
Authors: Barros Juliana Manhães , Silva Simone Vasconcelos
Published: July 2022

Os projetos na área de Arquitetura e Construção envolvem diversas etapas e participantes ao longo do processo e isso provoca ruídos e conflitos associados a inconstância das informações e insuficiência de dados. Para tal, se torna imprescindível o investimento em gestão de projetos visando a otimização dos resultados. O objetivo deste artigo é realizar uma análise por meio de pesquisas em bases científicas afim de responder a questão de pesquisa: “Quais os benefícios gerados pelos artefatos da gestão de projetos no ramo da Arquitetura e Construção?”. Para tal, foi realizada uma Revisão Sistemática da Literatura (RSL) referente às bases internacionais Scopus e Web of Science, com o intuito de elencar estudos que possuam aderência ao tema e respondam à questão de pesquisa proposta. Do processo de seleção utilizado, resultou-se a seleção de cento e quinze estudos relacionados ao tema, sendo que destes apenas onze estudos atendem à questão de pesquisa. Estes estudos foram analisados quantitativamente e qualitativamente, e pode-se constatar a utilização de dezenove tipos de artefatos, pertencentes a sete áreas de conhecimento da gestão de projetos, proporcionando diversos benefícios para o ramo da Arquitetura e Construção.
Mortalidade por doença respiratória crônica no Brasil: tendência temporal e projeções
Authors: Oliveira Marcio Sacramento de , Montovani Elisa Hypólito , Santana Maria de Fátima Ebole de , Ponce de Leon Antonio Carlos Monteiro , Marques Márcio Candeias
Published: July 2022

OBJETIVO Analisar a tendência temporal das taxas mensais de mortalidade por doenças respiratórias crônicas no Brasil de 1996 até 2017, com projeções para 2022, além de analisar a possibilidade de cumprimento da meta do Plano de Ações Estratégicas para o Enfrentamento das Doenças Crônicas Não Transmissíveis no Brasil de 2011 até 2022. MÉTODOS Trata-se de estudo ecológico que utiliza dados do Sistema de Informações sobre Mortalidade, do Sistema de Informações Demográficas e Socioeconômicas e da Pesquisa Nacional por Amostra de Domicílios Contínua. O recorte etário foi estabelecido entre 30 e 69 anos e a evolução das taxas no tempo foi feita por meio de modelos autorregressivos integrados de média móvel em plataforma estatística R. RESULTADOS As taxas de mortalidade precoce por doenças respiratórias crônicas apresentam-se decrescentes no Brasil como um todo e na maior parte das capitais, assim como, há tendência a atingir a meta do Ministério da Saúde na maior parte do país. Para capitais que tendem a não atingir a meta, verifica-se associação entre mortalidade e indicadores sociais, rede assistencial de saúde e frequência do tabagismo. CONCLUSÃO Pretende-se que o estudo possibilite um melhor planejamento do sistema público de saúde para o controle das doenças respiratórias crônicas.
Reproductive health practices and use of health services among immigrant Indonesian women working in Malaysia
Authors: Sutan Rosnah , Siregar Pinta Pudiyanti
Published: July 2022

OBJECTIVE To describe the reproductive health practices of immigrant Indonesian women working in Malaysia and their accessibility to health services. METHODS A cross-sectional study using a validated self-administered questionnaire was conducted with 593 immigrant Indonesian workers who stayed in Malaysia for at least six months and within the reproductive age group. RESULTS About 13.5% of the respondents have used health facilities for reproductive health-related problems. Less than half of the respondents preferred to use public health facilities. Only 15% used treatment available in health facilities related to irregular menstrual cycles (34.6%), severe dysmenorrhea (58.7%) and nonspecific symptoms related to menstruation (31.7%). Family planning services were the most required health service. However, only 31.5% met the needs for family planning services. One-third of the respondents had sexual reproductive health problems and required treatment, but only 9.9% sought reproductive health services when needed. CONCLUSIONS Strategies to improve the accessibility to sexual reproductive health services requires a collaboration between the Indonesian government representatives in Malaysia and non-governmental organizations to address the reproductive health issues among immigrant Indonesian women in Malaysia. Health policy related to immigrant workers is needed in order to enhance the accessibility to women’s health needs for universal health coverage.
Ambient air pollutants relate to hospital admissions for chronic obstructive pulmonary disease in Ganzhou, China
Authors: Zhou Xingye , Li Chenwei , Gao Yanfang , Zhou Chuanfei , Huang Lei , Zhang Xiaokang
Published: July 2022

OBJECTIVE To evaluate the relationship between ambient air pollutants and chronic obstructive pulmonary disease in relatively low-polluted areas in China. METHODS Atmospheric pollutants levels and meteorological data were obtained from January 2016 to December 2020. The medical database including daily hospital admissions for chronic obstructive pulmonary disease (ICD10: J44) was derived from the First Affiliated Hospital of Gannan Medical University. The generalized additive model was used to analyze the percentage change with 95% confidence interval in daily hospital admissions for chronic obstructive pulmonary disease associated with a 10 µg/m3 increase in atmospheric pollutants levels. RESULTS In total, occurred 4,980 chronic obstructive pulmonary disease hospital admissions (not including emergency department visits) during 2016–2020. The mean concentrations of daily PM2.5, PM10, SO2, NO2, O3, and CO were 37.5 μg/m3, 60.1 μg/m3, 18.7 μg/m3, 23.5 μg/m3, 70.0 μg/m3, and 1.2 mg/m3 in Ganzhou. Each 10 µg/m3 increment of PM2.5, PM10, NO2, and O3 were significantly associated with 2.8% (95%CI: 1.0–4.7), 1.3% (95%CI: 0.3–2.4), 2.8% (95%CI: 0.4–5.4), and 1.5% (95%CI: 0.2–2.7) elevation in daily chronic obstructive pulmonary disease hospital admissions. The estimates of delayed effects of PM2.5, PM10, NO2, and O3 were observed at lag6, lag6, lag8, lag1, respectively. The health effects of particulate pollutants (PM2.5 and PM10) may be independent of other pollutants. The adverse effects of air pollutants were more evident in the warm season (May–Oct) than in the cold season (Nov–Apr). CONCLUSION Our study demonstrated that elevated concentrations of atmospheric pollutant (PM2.5, PM10, NO2, and O3), especially particulate pollutants, can be associated with increased daily count of hospital admissions for chronic obstructive pulmonary disease , which may promote further understanding of the potential hazards of relatively low levels of air pollution on chronic obstructive pulmonary disease and other respiratory disorders.
Gender Strategies of Czech Female Diplomats
Authors: Fellegi Zuzana , Kočí Kateřina , Benešová Klára
Published: July 2022

Although Czech women are solidly represented in the Czech Ministry of Foreign Affairs, only a fraction of this 14 per cent make it to the highest positions. This underrepresentation is in stark contrast with Nordic countries, where women make up almost half of the top diplomats. Based on semi-structured interviews with top diplomats conducted in the period 2018-2021, this study aims to identify how Czech female diplomats assess their own gender and professional identity, and to what extent they apply these identities strategically in order to advance their careers. The research enriches concepts on femininities by adding a type of ‘principled feminist’ and further develops career strategies in a specific historical and cultural context. The analysis shows that conservative personal gender ideologies of top Czech female diplomats and their related career strategies present one of the major obstacles to the increased representation of women in top diplomatic positions.
Who Gets to Be a Virtuoso? Diplomatic Competence through an Intersectional Lens
Authors: Standfield Catriona
Published: July 2022

The practice turn in diplomatic studies has focused on how and when diplomats recognise others’ practices as competent. I argue that gendered, raced and classed power shape who is recognised as competent or virtuosic. Denial of recognition reveals how normative conceptions of competence reproduce inequalities in diplomacy. I trace the development and assessment of competence through the autobiographical narratives of Dame Margaret Joan Anstee, a British diplomat, diplomatic wife, international civil servant and then UN special representative in Angola in the 1990s. I find that developing social capital through education was key to allowing Anstee to transcend her working-class origins and enter the upper-class milieu of the post-World War II British Foreign Office. However, as the UN’s first female head of a peacekeeping mission, she struggled to be recognised as a competent actor, even as she took what could be seen as virtuosic action to resource the failing mission.
Larval morphology of the Neotropical diving beetle genus Hemibidessus Zimmermann, 1921 (Coleoptera: Dytiscidae: Bidessini)
Authors: MICHAT MARIANO C. , ALARIE YVES , BENETTI CESAR J.
Published: July 2022

We describe for the first time the larva of the diving-beetle genus Hemibidessus Zimmermann, 1921, based on instars II and III of H. conicus (Zimmermann, 1921). We include detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi in order to discover useful characters for distinguishing Hemibidessus larvae from those of other known Bidessini. Hemibidessus larvae characteristically have elongate legs armed with natatory setae and elongate urogomphi that bear numerous secondary setae, features commonly associated with an increased swimming ability. These characters are shared with Brachyvatus Zimmermann, 1921, suggesting a close phylogenetic relationship between these two genera. The primary seta UR8 is inserted apically on urogomphomere 2 in Hemibidessus larvae, a feature so far only shared with the mature larva of Yola Gozis, 1886. Other characters that combined with those previously mentioned are useful to distinguish Hemibidessus from other bidessines are the absence of a ventroapical spinula on antennomere 3 and the presence of secondary dorsal setae on protarsus.
Seasonally and Regionally Dependent Shifts of the Atmospheric Westerly Jets under Global Warming
Authors: Zhou Wenyu , Leung L. Ruby , Lu Jian
Published: July 2022

A distinct feature of the atmospheric circulation response to increasing greenhouse gas forcing is the poleward shift of the zonal-mean westerly jet. The dynamical mechanisms of the zonal-mean poleward jet shift have been extensively studied in literature. At seasonal/regional scales, however, the westerly jets can shift equatorward, such as in the early-summer Asia–Pacific region, the late-winter America–Atlantic region, and the winter/spring east Pacific. These equatorward jet shifts imply climate impacts distinct from those of the poleward shifts, yet their causes are not well understood. Here, based on a hierarchy of coupled, prescribed-SST, and aquaplanet simulations, we attribute the seasonal/regional equatorward jet shifts to the enhanced tropical upper-level warming (ETUW), which arises from both the tropical moist adiabat and the enhanced equatorial surface warming. By steepening the meridional temperature gradient in the subtropical upper-to-middle level and assisted by positive eddy feedback, the ETUW increases the zonal wind equatorward of the climatological jet. When the regional/seasonal meridional temperature gradients (or equivalently the westerly jets) are weak and peak close to the tropics, the ETUW effect overcomes the poleward jet-shift mechanisms and leads to the equatorward jet shifts. This climatological-state dependency is consistently seen in the decomposed jet responses to uniform warming and surface warming pattern, and further demonstrated through idealized aquaplanet experiments with designed climatological states. For uniform warming, the ETUW arising from moist adiabat makes the general poleward jet shifts insignificant in the aforementioned favorable regions/seasons. For warming pattern, the ETUW from enhanced equatorial warming drives substantial equatorward jet shifts in these favorable seasons/regions.
Oscillometry in total laryngectomized patients: A case study
Authors: Gilardi Antonio , Colucci Maria Carolina , Colizza Andrea , Barreto Mario , Minni Antonio , Ralli Massimo , Greco Antonio , Parisi Pasquale , Vincentiis Marco de
Published: July 2022

Attempts to analyze respiratory function of the laryngectomized patient with tests such as spirometry and plethysmography have been described in the literature, highlighting however substantial difficulties. Oscillometry, through the forced oscillation technique (FOT), measures the mechanical properties of the respiratory system minimizing the problems related to the patient's lack of compliance. This methodology has never been applied to these patients and therefore represents a new perspective in the analysis of respiratory function.
Post stroke intervention trial in fatigue (POSITIF): Randomised multicentre feasibility trial
Authors: Mead Gillian , Gillespie David , Barber Mark , House Allan , Lewis Steff , Ensor Hannah , Wu Simiao , Chalder Trudie
Published: July 2022

Objective

To test the feasibility of a telephone delivered intervention, informed by cognitive behavioural principles, for post-stroke fatigue, and estimated its effect on fatigue and other outcomes.

Design

Randomised controlled parallel group trial.

Setting

Three Scottish stroke services.

Subjects

Stroke survivors with fatigue three months to two years post-stroke onset.

Interventions

Seven telephone calls (fortnightly then a ‘booster session’ at 16 weeks) of a manualised intervention, plus information about fatigue, versus information only.

Main measures

Feasibility of trial methods, and collected outcome measures (fatigue, mood, anxiety, social participation, quality of life, return to work) just before randomisation, at the end of treatment (four months after randomisation) and at six months after randomisation.

Results

Between October 2018 and January 2020, we invited 886 stroke survivors to participate in postal screening: 188/886 (21%) returned questionnaires and consented, of whom 76/188 (40%) were eligible and returned baseline forms; 64/76 (84%) returned six month follow-up questionnaires. Of the 39 allocated the intervention, 23 (59%) attended at least four sessions. At six months, there were no significant differences between the groups (adjusted mean differences in Fatigue Assessment Scale −0.619 (95% CI −4.9631, 3.694; p = 0.768), the Generalised Anxiety Disorder 7 −0.178 (95% CI −3.823, 3.467, p = 0.92), and the Patient Health Questionnaire −0.247 (95% CI −2.935, 2.442, p = 0.851). There were no between-group differences in quality of life, social participation or return to work.

Conclusion

Patients can be recruited to a trial of this design. These data will inform the design of further trials in post-stroke fatigue.
Factors Associated With Parent IEP Satisfaction
Authors: Sanderson Kelli A. , Goldman Samantha E.
Published: July 2022

While the challenges experienced by parents during Individualized Education Program (IEP) meetings have been well documented, limited research has examined parent satisfaction with the IEP document itself and which factors are associated with greater satisfaction. Using 1,183 responses from a national survey, we addressed the following research questions: (a) How satisfied are parents with their child’s current IEP? and (b) What characteristics of the parent, child, family–professional partnership, and IEP meeting predict greater parent satisfaction with their child’s IEP? Approximately 40% of parents reported some degree of dissatisfaction with their child’s IEP. Several child characteristics were associated with the most extreme levels of satisfaction. Results of a regression analysis indicated that, for this sample, parent, child, family–professional partnership, and IEP meeting characteristics significantly predicted parent satisfaction, with characteristics of the IEP meeting among the strongest predictors. Implications are discussed, including the need to replicate these findings with a more representative sample.
“The Glorious Pain”: Attaining Pleasure and Gratification in Times of Delayed Onset Muscle Soreness (DOMS) among Gym Goers
Authors: Lev Assaf
Published: July 2022

Delayed onset muscle soreness (DOMS) is a widely known phenomenon among gym goers. For many of them, experiencing DOMS the day after working out in the gym is often perceived as rewarding and something of which to brag and be proud. Although existing work within the biomedical field has undoubtedly shed light on coping with and managing DOMS, there remains little in-depth qualitative research on the gym goer’s lived experience regarding this phenomenon. Following Becker’s conceptual framework of using marihuana for pleasure, the article will examine the way gym goers learn to attain pleasure and gratification in times of DOMS through a process of reframing and socialization. Ethnographic research was conducted for two years in two gyms, using a combination of participant observation and semi-structured interviews. Findings illustrate three coherent stages a novice gym goer experiences while becoming an experienced gym goer and enjoying DOMS: (1) learning the proper “working-out” technique required to experience positive effects; (2) recognizing the effects of DOMS and their connection with the workout; and (3) enjoying the effects of DOMS caused by working out. Moreover, once gym goers manage to change the definition of negative sensations and interpret them as enjoyable, DOMS often becomes an indispensable experience that has to be religiously pursued. In this context, the audience in front of which the gym goers perform their DOMS serves as a “front region of behavior” for gaining social recognition by instrumentalizing their pain to strengthen and solidify their gym goer identity.
Understanding social innovation activities for energy transition: Evidence from experiences of social innovation agents in South Korea
Authors: Kim Gyuhwan , Lee Taehwa
Published: July 2022

Even though social innovations activities have been garnering global interest, their implications on energy transition remain unclear. In this study, we aimed to define social innovation activities that can support energy transition. We interviewed 19 social innovation agents, and the grounded theory (GT) method was applied to define the social innovation activities applicable for energy transition through inductive reasoning. Our results revealed that social innovation activities for energy transition could be defined as the entire interaction process between the pragmatic actions of agents and the participation of citizens. Notably, social innovation activities for energy transition could increase citizen participation and help economies to transition from conventional to alternative energy production and use systems. Thus, these activities lead to significant changes in the behaviors and attitudes of citizens, which are the prime factors when incorporating a subsequent structural change. Our study can provide a reliable framework to understand social innovation activities for energy transition and guide both agents and policy practitioners in decision-making, to improve and smoothen energy transition in South Korea.
Genomic hybrid capture assay to detect Borrelia burgdorferi: an application to diagnose neuroborreliosis in horses
Authors: Divers Thomas J. , Mongodin Emmanuel F. , Miller Christopher B. , Belgrave Rodney L. , Gardner Rachel B. , Fraser Claire M. , Schutzer Steven E.
Published: July 2022

Antemortem diagnosis of neuroborreliosis in horses has been hindered by both the low sensitivity of PCR testing for Borrelia burgdorferi in CSF and the low specificity of serum:CSF ELISA ratios used to determine intrathecal antibody production against the bacterium. PCR testing of the CSF of an adult horse with acute neurologic disease for the B. burgdorferi flagellin gene was negative. However, we enriched B. burgdorferi DNA through nucleic acid hybrid capture, followed by next-generation sequencing, and identified B. burgdorferi in the CSF of the horse, confirming a diagnosis of neuroborreliosis.
Efficacy of Veno-Arterial Extracorporeal Life Support in Adult Patients with Refractory Cardiogenic Shock
Authors: Kurniawati ER , van Kuijk SMJ , Vranken NPA , Maessen JG , Weerwind PW
Published: July 2022

Background

This study aimed to describe the efficacy of veno-arterial extracorporeal life support (VA-ECLS) through early lactate clearance and pH restoration and assess the potential association with 30-day survival following hospital discharge.

Methods

Data of patients receiving VA-ECLS for at least 24 h were retrospectively compiled. Blood lactate levels, liver enzymes, and kidney parameters prior to VA-ECLS initiation and at 2, 8, 14, 20, and 26 h of support had been recorded as part of clinical care. The primary outcome was 30-day survival.

Results

Of 77 patients who underwent VA-ECLS for refractory cardiogenic shock, 44.2% survived. For all non-survivors, ECLS was initiated after eight hours ( p = .008). Blood pH was significantly higher in survivors compared to non-survivors at all time points except for pre-ECLS. Lactate levels were significantly lower in survivors (median range 1.95-4.70 vs 2.90-6.70 mmol/L for survivors vs non-survivors, respectively). Univariate and multivariate analyses indicated that blood pH at 24 h (OR 0.045, 95% CI: 0.005-0.448 for pH <7.35, p = .045) and lactate concentration pre-ECLS (OR 0.743, 95% CI: 0.590-0.936, p = .012) were reliable predictors for 30-day survival. Further, ischemic cardiogenic shock as ECLS indication showed 36.2% less lactate clearance compared to patients with other indications such as arrhythmia, postcardiotomy, and ECPR.

Conclusion

ECLS showed to be an effective treatment in reducing blood lactate levels in patients suffering from refractory cardiogenic shock in which the outcome is influenced by the initial lactate level and pH in the early phase of the intervention.
Examining the hikikomori syndrome in a French sample of hospitalized adolescents with severe social withdrawal and school refusal behavior
Authors: Benarous Xavier , Guedj Marie-Jeanne , Cravero Cora , Jakubowicz Barbara , Brunelle Julie , Suzuki Kunifumi , Cohen David
Published: July 2022

While the term hikikomori (HKM) has spread internationally to describe a chronic and severe form of social withdrawal, its place in current nosography and its transposition into non-Asian cultures are still debated. A retrospective chart review was conducted to determine the rate and the clinical profiles of HKM among a French sample of adolescent inpatients. Data were obtained from 191 adolescents aged 12–18 years ( M = 15.0, 44% boys) consecutively admitted in two inpatient units from January 2017 to December 2019. Using a retrospective diagnosis of HKM based on Teo and Gaw's criteria, we compared socio-demographic characteristics, clinical features, and treatment outcomes between HKM patients and those with other forms of social withdrawal and/or school refusal (SW/SR). At admission, 7% of participants met HKM criteria ( n = 14, M = 14.3, 64% boys), one out of six adolescents with SW/SR. Among those with SW/SR, HKM + vs. HKM- participants had higher rates of anxiety disorder (Odd Ratio, OR = 35.2) and lower disruptive behavioral disorder ( OR = 0.03). A minority of the participants with anxiety and depressive disorders met the HKM criteria (respectively, 15% and 9%), but those with HKM had a longer duration of symptoms, longer hospitalization, and required more daily care facilities at discharge compared to HKM-. While HKM syndrome could not be delimitated from anxiety disorder, it was associated with specific clinical features and treatment outcomes. The clinical characteristics observed were consistent with the features reported in Asian HKM adults, supporting face validity of this clinical concept in adolescent inpatients with different cultural contexts.
Simulation of high speed rotating dynamics in constrained mechanical systems
Authors: Zhou Ping , Ren Hui
Published: July 2022

High-speed rotating motion is an important issue in mechanical systems such as propellers or turbine blades. Difficulties occurs in the simulation of high-speed rotating dynamics, resulting in unexpected and unreliable numerical results. For example, the calculated angular velocity usually doesn’t increase linearly but grows until reaching a saturation value under a constant torque. This phenomenon will be more complex in constrained mechanical systems, especially in a flexible system. This work aims to address this issue that arises in the simulation of high-speed rotating dynamics, where a new formulation of non-linear floating frame of reference formulation is proposed to solve constrained flexible system. Pros and cons of various numerical techniques in the field of multibody system dynamics are compared and discussed here. These techniques involve the Euler parameter formulation, local rotational parameters, minimal coordinate set approach and the nonlinear elastic formulation. Cases with constrained rigid or flexible system are studied here. This work provides an insight into practical simulations of high-speed rotating mechanical systems.