bluuebunny/crossref_metadata_2025 huggingface dataset:
Mezo-gözenekli SnO2 Nanokompozitlerin Fotokatalitik Aktivitelerinin İncelenmesi
Authors: Öztürk Teoman
Published: August 2021

Bu sunulan çalışmada, saf SnO2 ve gözenekli yapıya sahip sodyum karboksimetil selüloz (Na-CMC) içeren SnO2 nanokompozitlerin fotokatalitik aktiviteleri incelenmiştir. Saf SnO2 ve Na-CMC içeren SnO2 nanokompozitler doğrudan kolloidal SnO2 çözeltisi kullanılarak kolay ve düşük maliyetli bir yöntem olan damlatma biriktirme yöntemi ile sentezlenmiştir. Sentezlenen malzemelerin yapısal ve morfolojik karakterizasyonları XRD ve SEM analizleri ile yapılmıştır. Ayrıca saf, (ağırlıkça) %5 ve %10 Na-CMC katkılı SnO2 nanokompozitlerin fotokatalitik aktiviteleri, UV ışık altında metilen mavisi sulu çözeltisinin bozunması yoluyla incelenmiştir. Metilen mavisinin bozunma deneylerinde %5 Na-CMC içeren SnO2 oldukça yüksek bir fotokatalitik aktivite sergilemiştir. Gözenekli yapıya sahip SnO2, sahip olduğu çok sayıda aktif yer vasıtasıyla fotokatalitik aktivitenin artışını sağlamıştır.
Needs Analysis in Curriculum Design: Language Needs of Tourism Students
Authors: AYSU Semahat , ÖZCAN Fatma Hülya
Published: August 2021

In this study, the main aim was to reveal English language needs of tourism students for their future profession. Regarding the obtained needs from students, graduates, content experts and employers in tourism sector, goals and objectives of Vocational English Course were set. The data were collected through needs analysis questionnaires and semi-structured interviews. 70 students in the school where the researcher works, 112 graduates of Tourism and Hotel Management program, 9 content experts and 51 employers working in tourism sector answered the questionnaire. 8 students, 11 graduates, 2 content experts and 5 employers took part in semi-structured interviews voluntarily. After the questionnaire was administered to four groups of participants, the obtained data were analyzed through SPSS 20. On the other hand, while analyzing the qualitative data, the recordings were transcribed for the analysis of data by the researcher. Then, a list of codes developed by Wen (2010) was drawn on for coding. The results indicated that 4 language skills (reading, listening, speaking and writing) were important for tourism students, but particularly listening and speaking language skills for their future profession were emphasized.
Evaluasi fertilitas, daya tetas, dan kualitas DOD dari itik Alabimaster, Mojomaster, dan Mojomaster x Alabimaster
Authors: Kostaman Tatan , Kumalawati Dewi Sari , Sopiyana Soni , Purba Maijon
Published: August 2021

Objective: The evaluating of the fertility, hatchability, and DOD quality of the ducks selected by the Indonesian Research Institute for Animal Production (Balitnak) consisting of Alabimaster, Mojomaster, and Mojomaster x Alabimaster (MASTER) ducks.

Methods: The research was conducted at the Ducks Cage Complex, Balitnak. Using 9,388 Alabimaster duck eggs, 1,635 Mojomaster duck eggs, and 7,638 Mojomaster x Alabimaster (MASTER) duck eggs. The variables observed included fertility, hatchability, and DOD quality. The DOD criteria chosen were healthy, agile, not blind, not disabled, not weak, not wet, and not omphalitis. Completely Randomized Design (CRD) was used and the calculation of the average data for all variables was processed with the help of the SPSS 25.0 program. If there is a difference in value, then the test is carried out with the Duncan Multiple Range Test.

Results: The fertility percentage of Alabimaster, Mojomaster, and MASTER ducks did not show any difference (P>0.05) but seen from the relatively high percentage value because it gave a figure of 94%. The percentage of hatchability was significantly different (P<0.05) for the three ducks. The percentage of DOD that passed the selection, MASTER ducks gave a higher value than the other two ducks. The ratio of male and female cubs for the three ducks showed that there were more male than female cubs, but still within the normal range.
Conclusions: The average fertility, hatchability, and DOD selected from the hatching eggs of Alabimaster, Mojomaster, and MASTER ducks resulted from the research being quite good.
Studi empiris pengaruh peran, kinerja dan inovasi technical service perusahaan kemitraan broiler terhadap keberdayaan peternak
Authors: Nurtanti Ina , Purnomo Sutrisno Hadi , Kusnandar Kusnandar
Published: August 2021

Objective: This study aim was to analyze the influence of technical service (TS) role, performance, technical, and innovation on the broiler partnership to farmer empowerment.

Methods: Sampling technique used was proportionate random sampling with 145 respondents. The analysis technique used in this study was variance-based structural equation model (SEM) or Component based SEM of Partial Least Square (PLS).

Results: Based on descriptive quantification (scale Likert 1-5, very bad-very good), it was obtained that the variable role of TS had an average of 4.00 which can be interpreted that the farmers assessment to TS role is good. The TS performance variables have an average of 3.92 which mean farmers evaluated it as good enough. TS innovation variables have an average of 3.93 which means good enough. The farmer empowerment variable has an average of 3.96 which can be interpreted as good enough. Validity and reliability test results indicate the instrument is worth to use. In structural model test, the results based on R2 (0.734, 0.733 and 0.764), GoF (0.744) and Q2(0.983) show the SEM model is worth to use.
Conclusions: There is a significant influence of the role, performance and innovation of TS partially on the empowerment of farmers and there is a significant influence of the role and innovation to TS performance.
Contradictory Pleural based Mass Occurred in Patients with Pleural Tuberculosis during the Treatment: A Clinical Observational Study in China
Authors: Dong Zhengwei , Zhang Wei , Sun Wenwen , Zhang Shaojun , Yang Chenlu , Wu Chunyan , Fan Lin
Published: August 2021

Background: Recent years pleural based mass newly occurred during anti-tuberculosis (TB) treatment had been observed in patients with pleural TB. Its occurrence is contradictory and unfavorable for the outcome of patients. This study aims to explore its clinical, pathological and bacteriological characteristics.Methods: Patients newly diagnosed as pleural TB met included criterion were prospectively enrolled into the study. Patients were followed up throughout the treatment, clinical data were recorded. Percutaneous biopsy and surgical tissues from pleural based mass were pathologically and bacteriologically examined, related clinical factors were calculated by Fagan's nomogram and ROC curve. Results: A total of 122 patients with pleural TB were enrolled. 34.4% of them (42/122) were newly observed pleural based mass during the treatment, 12 cases received surgical resection at the 12±0.5 months of treatment course, under surgical observation only 58.3% of them (7 /12) were located on pleura, 41.7% (5/12) of them were located in lung parenchyma. Pathological observations showed that pleural based masses were divided into three types: granulomatous inflammation, fibrous hyperplasia and necrosis type. Mycobacterium tuberculosis PCR was positive in 57.1% of cases (24/42), any first-line anti-TB drug resistance gene mutation was positive in only 9.5% (4/42). Besides 12 cases receiving surgical operation, there were 86.7% of patients (26/30) in which pleural based mass still existed at the end of 12 months course. Young age, pleural thickness and adhesion, higher LDH, ADA, TGF-β and PAI-1, lower GLU and t-PA in pleural effusion were risk factors of occurring pleural based mass. Conclusions: Pleural based mass had been observed in about one third of patients with pleural TB, which were located in lung or pleura and divided into three pathological types. There are some clinical characteristics as its predictive risk factors.
An Adaptive Fuzzy C Means With Seagull Optimization Algorithm for Analysis of WSNs in Agricultural Field With IoT
Authors: Karunkuzhali D. , Meenakshi B. , Lingam Keerthi
Published: August 2021

In recent years, the environmental monitoring in agriculture field is an essential required application. To achieve the environmental monitoring of agriculture fields, the wireless sense networks (WSN) and Internet of Things (IoT) is utilized. In the WSN, the energy consumption is a main issue to access the medium and transfer the networks. Hence, in this paper, Adaptive Fuzzy C means clustering and Seagull Optimization Algorithm (AFCM-SOA) is developed for monitoring environmental conditions in agriculture field. Two main objective functions are utilized to empower the presentation of the WSN such as load balancing and energy efficient operation. The proposed method is a combination of Fuzzy C Means Clustering and Seagull Optimization Algorithm (SOA). The energy efficient and load balancing is achieved by optimal routing scheme by proposed method. The Fuzzy C-Means Clustering is utilized to empower the energy efficient operation and load balancing. In the Fuzzy C-Means Clustering, the SOA is utilized to select the optimal path selection. The proposed method is executed by NS2 simulator and performances are compared with existing methods such as Atom Search Optimization (ASO) and Emperor Penguin Optimization (EPO) respectively. The performance metrics are delay, drop, throughput, energy consumption, network lifetime, overhead and delivery ratio.
A Method for Studying Acidification and Eutrophication Potentials of a Residential Neighbourhood
Authors: Nematchoua MODESTE Kameni , Asadi Somayeh , Rim Donghyun , Obonyo Esther , Reiter Sigrid
Published: August 2021

Acidification and Eutrophication are two environmental impacts that have a significant effect on air pollution and human health. The quantitative analysis of these two impacts remains hitherto unknown at the scale of new neighborhoods. The main purpose of this research is to evaluate, analysis and compare the acidification and eutrophication potentials of one neighborhood initially located in Belgium. To perform this comparison, the same neighborhood design is applied to in150 countries, but four parameters are adapted to each country: energy mix, local climate, building materials, and occupants’ mobility. In addition, this research evaluates the induced environmental costs of the neighborhood over 100 years and examines the impact of the photovoltaic panel on these environmental impacts. This research, extended to the scale of several nations, will enable new researchers, and especially policy-makers, to measure the effectiveness of sustainable neighborhoods. Eutrophication and acidification potentials were assessed under different phases (construction, use, renovation, and demolition), with Pleiades ACV software. Among the four local parameters (energy mix, local materials, climate, and transport, the energy mix has the most significant effect on the two studied environmental impacts. The results show that 72 %, and 65% of acidification, and eutrophication potentials are produced during the operational phase of the neighborhood. In the case of sustainable neighborhoods, the acidification potential is 22.1% higher in the 10 top Low incomes countries than the 10 top High-income countries. At the neighborhood scale the main eutrophication potential component is water (34.2%), while, the main source of acidification potential is electricity production (45.1%)
Removal of phenol from aqueous solution using biochar produced from Araucaria Columnaris Bark
Authors: Chandola Dinesh , Thathola Pooja , Bisht Ankit
Published: August 2021

Abstract
This work investigates the removal of phenol from aqueous solution using Araucaria Columnaris bark (ACB) as biochar. Five different types of biochars were developed through pyrolysis at different temp from 300 to 500°C. The effects of initial concentration, contact time, pH and temperature on adsorption behavior were studied in batch mode for each biochar. The optimum contact time observed for equilibrium condition was 60 mins for every biochar. And, the maximum adsorption followed the order 298 K > 308 K > 318 K. Adsorption equilibrium data were fitted to Langmuir and Freundlich isotherms by non-linear regression method and kinetic data by linear regression method, and fitted to pseudo-first order, pseudo-second order and Intraparticle diffusion models. Adsorption kinetics was reasonably described by pseudo-second order model with R 2 value 0.99. Thermodynamic parameters were also estimated that implied, the adsorption process was spontaneous and exothermic in nature. Study further showed that the acidic pH increased adsorption capacity of biochar but decreases continuously towards basic side. The removal of phenol with prepared biochar was achieved as high as 100 % for ACB-500. The maximum iodine adsorption value of prepared biochar was found to be 453.3 mg/g.
Design of Low Power Multiplier With Less Area Using Quaternary Carry Increment Adder for New-Fangled Processors
Authors: Gavaskar K , Malathi D , Ravivarma G , Priyatharshan P.S , Rajeshwari S , Sanjay B
Published: August 2021

Multiplication is one of the basic functions in Digital Signal Processing (DSP) applications. Multiplier plays an important role in Arithmetic and Logic Unit (ALU), which is a critical element in the processors. The efficiency of the multiplier takes part a crucial task in the execution of the processor. The performance of the multiplier depends on the adder circuit. The addition operation is the fundamental operation used in most of the digital circuits. Power, delay and area are the main issues in VLSI circuits. Efficiency of a VLSI circuit can be improved by rectifying any of these issues. Quaternary Signed Digits (QSD) placed on adders have better efficiency when compared to traditional binary logic. QSD based Carry Look Ahead (CLA) Adder is used to increase the efficiency with reference to power and delay. The proposed method uses Quaternary Carry Increment Adder in order to improve the power and reduce the delay of the existing Quaternary Carry Look Ahead Adder. Tanner EDA is the simulation tool used to design the circuits and the power, delay and power-delay product of the designed circuits are measured using it.
Potential Roles of Long Non-Coding RNAs in Regulating Cell Proliferation, Invasion, and Metastasis in Ovarian Serous Cystadenocarcinoma
Authors: Kan Mujie , Zhang Housen , Dong Chengya , Xu Tianmin , Li Qi
Published: August 2021

Background: Ovarian serous cystadenocarcinoma (OSC) is the most common gynecological malignancy. Long non-coding RNAs (lncRNAs) are aberrantly expressed in many cancers and involved in cell proliferation, apoptosis, angiogenesis, and invasion. Here, we investigated the functional roles of lncRNAs in OSC in detail.Methods: We analyzed a cohort of exon microarray datasets from The Cancer Genome Atlas and used differentially expressed lncRNAs and mRNAs to construct an lncRNA-mRNA co-expression network. Distinct lncRNAs were classified into lincRNA, enhancer-like lncRNAs, or antisense lncRNAs. Biological functions for lncRNAs were predicted according to the lncRNA-mRNA network and genomic adjacency by KEGG pathway analysis. A transcription factor (TF)-lncRNA regulatory network was constructed by integrating lncRNA molecular profiles and TF binding information. Results: We identified 2,939 lncRNAs and 2,766 mRNAs that were differentially expressed between OSC and normal ovary tissues. The 67 lncRNAs in the lncRNA-mRNA network, 23 lincRNAs, 19 antisense lncRNAs, and four enhancer-like lncRNAs were involved in cell proliferation, invasion, and metastasis. The TFs ING4, TTF-1, RUSH-l alpha, Kaiso, and STAT1 targeted regulation of lncRNAs in the pathological processes of OSC. Expression of 10 lncRNAs and mRNAs, as well as SOS1, ITGB1, and BIRC2 mRNAs with their identified lncRNAs were verified by qRT-PCR in OSC tissues. Conclusion: We predicted the biological functions of many lncRNAs, which may serve as diagnostic and prognostic biomarkers as well as therapeutic targets in OSC.
Global and Regional Shock Transmission ―Application of Global Input-Output Table―
Authors: Shrestha Nagendra , Sato Kiyotaka
Published: August 2021

This paper constructs and uses the global input-output (GIO) table with 35 industries, 29 endogenous countries and 59 exogenous countries, and develops new indices to measure the degree of shock transmission in terms of intermediate goods and value-added embodied in production induced by negative global demand shock to finished goods. After the Global Financial Crisis (GFC) in 2008, China did not experience a large decline in economic growth, even though China’s gross exports fell most severely among Asian countries. In contrast, a sharp decrease in Japanese GDP in 2009 is a consequence of a substantial decline in finished goods exports, especially in the transport equipment industry. In Japan, the shock effect tends to be absorbed in its domestic sector and is not transmitted to other foreign countries. An asymmetric pattern of shock transmission between Japan and other Asian countries can explain why Japan was more affected by GFC than other Asian countries.
Predict Value of Relative Telomere Length, TERT, and Follicular Fluid Anti-mullerian Hormone Levels for IVF Outcome in Infertile Women
Authors: Hao Yan , Lv Mingrong , Peng Jing , Zhang Zhihua , Zhang Zhiguo , Zhang Zhou , Wang Tingting , Zhou Ping , Wei Zhaolian , Cao Yunxia
Published: August 2021

Background: Telomere attrition has been shown to play a critical role in the reproductive aging process in human beings. Telomere length (TL) is normally regulated by telomerase enzyme. Telomerase reverse transcriptase (TERT) is the main component of the telomerase. Anti-Mullerian hormone (AMH), a member of the transforming growth factor superfamily, is derived from the granulosa cells of early developing pre-antral and antral follicles. The aim of this study was to evaluate the associations between relative telomere length (RTL), TERT expression of granulosa cells (GC), follicular fluid (FF) AMH levels and ovarian/embryonic performance in infertile women at different age. Moreover, whether they acting as predictors for probability of clinical pregnancy were also assessed. Method: A total of 160 women underwent their ﬁrst fresh cycle of in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) were included in our study as follows: 100 women were enrolled for RTL measurement and 60 women were enrolled for TERT measurement. All these 160 women underwent FF AMH measurement. Correlations between RTL，TERT expression, FF AMH levels and age, ovarian/embryonic performance and probability of clinical pregnancy were assessed.Results: There was a statistically significant relationship between the expression levels of TERT, RTL, FF AMH levels and patient age(r = −0.20, P = 0.04; r=0.30, P=0.02; r=-0.191, P=0.003, respectively). Relationships between the expression levels of TERT, FF AMH levels and oocytes yield were significant (P<0.001; P<0.05, respectively). However, no statistically correlation was observed between the RTL of GC samples and oocytes yield. All these three biomarkers had no correlation with blastocyst formation rate. There was significant relationship between FF AMH levels and probability of clinical pregnancy in patients older than 35 years (OR=1.284, 95%CI=1.031-1.599, P=0.026). Conclusion: RTL, relative TERT expression in GC and AMH levels in follicular fluid are age-related, but all of them fail to predict embryonic outcomes. Relative TERT expression and FF AMH levels appear to be more reliable for prediction of ovarian response than RTL. FF AMH is also a good predictor for probability of clinical pregnancy in advanced women.
Study on the Changes of Structural Covariance Network in Post-traumatic Stress Disorder
Authors: Xu Tongtong , Chen Feng , Zhang Li , Dai Yingliang , Ke Jun , Qi Rongfeng , Zhong Yuan , Lu Guangming
Published: August 2021

It has been widely discussed that the topological characteristics of the functional brain network in post-traumatic stress disorder (PTSD) demonstrates impairments, but the topology of structural covariance network has rarely been studied. Based on graph theoretical approaches, we compared the topological organization of structural covariance networks among PTSD, trauma-exposed control (TEC) group and healthy control (HC) group by constructing covariance networks of cortical thickness. Structural magnetic resonance imaging (sMRI) scans and clinical scales were performed in 27 PTSD, 33 TEC and 29 HC subjects. Based on the cortical thickness correlations, morphological network was constructed and analyzed for each group. Pearson correlation coefficients were computed to explore the relationship of brain network measurements with clinical scales. PTSD and HC subjects did not differ at the global level. Significantly increased clustering coefficient (p = .014) and local efficiency (p = .031) were observed in PTSD group compared with TEC subjects. At the nodal level, PTSD showed extensive increased nodal centralities in comparison to the other two groups (p < .05, uncorrected for false-discovery rate). The structural brain network topological characteristics found in this study suggest that PTSD manifests differently compared to TEC group from pathophysiological perspective. Greater network separation and increased nodal centrality in PTSD patients may be concerning emotional disorders.
Calpains Induce Egg Production Through Mirnas Secretion in Extracellular Vesicles Released From Paired Adult Worms of Schistosoma Japonicum
Authors: Kumagai Takashi , Shimogawara Rieko , Ichimura Koichiro , Iwanaga Shiroh
Published: August 2021

Extracellular vesicles (EVs) have been reported to be secreted from Schistosoma japonicum at all developmental stages. However, the reproduction and communication mechanisms between the paired adults through the EVs in dioecious Trematoda have not been reported. In this study, EVs containing many exosome-like vesicles and microvesicles were observed in the supernatants of paired adults cultured in vitro, and abundant selected miRNAs were contained in them. In particular, the female-specific miR-bantam was present only in vesicles and was hardly secreted outside the vesicles. In this study, we found that male-female pairing induced secretion of miR-3479 and miR-bantam in EVs, but not of male-specific miR-61. Furthermore, ingestion of mouse erythrocytes also increased the production of miRNAs in paired adult and single female worms. Vesicles were found in the teguments of females treated with erythrocytes under electron microscopy. After the paired worms were treated with several inhibitors against the secretion of EVs, only calpain inhibitor (calpeptin) significantly reduced the amount of miRNA in EVs. Furthermore, the worms treated with only calpeptin inhibited egg production in vitro. Together, these results indicate that qualitative miRNA production through EVs regulated by calpain plays a role in egg production in S. japonicum.
The effect of epilepsy control on psychogenic non epileptic seizures
Authors: Muaz.A.Ibrahim  , Tasneem.M.F  , Ahmed Khabab Abbasher Hussien Mohamed , Abdallah Abdallah M. , Omer Mohammed Eltahier Abdalla , Hussien Abbasher
Published: August 2021

Background: Epilepsy is one of the most common neurological diseases. The coexistence of epilepsy and PNES poses a major challenge to neurologists and psychiatrists in the treatment and follow-up care of patients. Methods: 33 Sudanese patients with epilepsy and concomitant psychogenic non epileptic seizure where included in this study and full detailed history of both epilepsy and PNES was obtained. The study was conducted in Daoud charity clinic during the period from May to July 2018Results : Out of 33 patients 19 were males and 14 were females. Seven patients had focal epilepsy, 23 had generalized tonic clonic epilepsy (GTC), 2 had GTC with atypical absent seizure, and one had GTC with myoclonus.Six patients experienced an attack of PNES after more than 1 year of being free of epilepsy, while 9 patients had PNES attack between 3 months to 1 year of the last attack of epilepsy, and 18 patients developed both PNES and epilepsy within less than 3 months.The pattern of presentation of PNES was bizarre movements in 13 patients, abnormal behavior in 9 patients, while 11 patients experienced both bizarre movement and abnormal behavior note that all those 11 patients had GTC epilepsy. Conclusion: Experiencing psychogenic non epileptic seizure (PNES) in patients with coexisting PNES and epilepsy is not affected by the epilepsy free period
Light And Oxygen Impelling Rubrivivax Gelatinosus Directly Used Food Processing Wastewater To Accumulate Poly-β-Hydroxybutyrate, 5-Aminolevulinic Acid, Pigment
Authors: Wu Pan , Xu Xiaohan
Published: August 2021

Background: Rubrivivax gelatinosus have the advantage of using wastewater to realize biomass recovery. However, they still cannot be large-scale applied because they cannot directly treat the wastewater containing macromolecular organics. Thus, this paper investigated the effect of light-oxygen condition on Rubrivivax gelatinosus (R. gelatinosus) directly recycling wastewater containing macromolecular organics to produce biomass, poly-β-hydroxybutyrate (PHB), 5-Aminolevulinic acid (5-ALA), pigment.Results: R. gelatinosus directly treated the macromolecules organic (soybean protein and starch) wastewaters and achieved biomass recovery under light-anaerobic and light-micro oxygen in six conditions. COD, protein, starch removals for two wastewaters all reached above 70%. Renewable bio-resource such as biomass, PHB, 5-ALA, pigment productions were 10 times of initial content. Theoretical analysis indicated that light activated two component signal pathway by stimulating its first hk gene expression, which regulated synthesis of protease and amylase. However, oxygen concentration decided the level of gene expression and the amount of enzymes. When oxygen was at micro-oxygen or anaerobic, above these expression and synthesis were conducted. Conclusion: In summary, this study expanded the view point ignored by traditional theory. It was realized that PNSB directly treated wastewater and accumulated nutrients (biomass, PHB, pigment and 5-ALA) for recycling, which reduced the secondary pollution of excess sludge to the environment.
25 Years of Ed Tech, 2020 By Martin Weller. Athabasca University Press.
Authors: Clarke Gray Brenna
Published: August 2021

Martin Weller’s 25 Years of Ed Tech is a necessary – and surprisingly fun! – review of the technologies, practices, pedagogies, and historical amnesias that have created (and plagued) the field of educational technologies for the last two and a half decades. In tracing the major technological developments, Weller also outlines the trends that shape these developments, and suggests some rules for good practice as we look towards a future where technology-enabled learning is almost certainly the norm, if not the default.
Eficiência da estação de tratamento de efluentes do Município de Corrente, Estado do Piauí, Nordeste do Brasil
Authors: Maciel Estéfani Barros , Silva Marcília Martins da , Pereira Luana de Castro , Lopes Luzirany Soares , Carvalho Cecília de Souza , Souza Raiane Oliveira de , Gomes Patrine Nunes
Published: August 2021

Atualmente o crescimento populacional e o desenvolvimento de novas atividades têm aumentado a demanda ao uso da água, recurso fundamental à vida, e seu uso doméstico pode influenciar no aumento da geração de efluentes, que quando não tratados corretamente afetam diretamente a qualidade socioambiental. Neste sentido, a fim de assegurar a disponibilidade da água aos presentes e futuras gerações, torna-se de grande valia manter a qualidade de vida nos grandes centros urbanos, e, além disso, reduzir os impactos ambientais em decorrência das ações antrópicas, cabendo aos órgãos governamentais buscar fins que proporcionem a qualidade para o lançamento correto dos efluentes em corpos hídricos. Visto isso, o presente estudo objetivou analisar a eficiência da Estação de Tratamento de Efluentes do Município de Corrente, Estado do Piauí, Nordeste do Brasil. As coletas foram efetuadas em abril de 2019, durante período chuvoso. As variáveis analisadas foram oxigênio dissolvido, demanda bioquímica de oxigênio, amônia, nitrito, nitrato, fósforo total, coliformes totais, temperatura e pH. Com base nos resultados obtidos, observou-se que temperatura, amônia, nitrito, nitrato, oxigênio dissolvido, demanda bioquímica de oxigênio e pH estão de acordo com os padrões estabelecido nas resoluções do Conselho Nacional de Meio Ambiente (CONAMA). Fósforo e coliformes não apresentaram valores adequados que permitam que os efluentes sejam lançados no corpo receptor (Rio Corrente). Conclui-se assim que apesar da estação possuir eficiência na maioria das variáveis analisadas, há a necessidade de melhorar sua estrutura, com finalidade de atender toda a população urbana. Bem como seria de suma importância que o município possuísse um sistema de coleta separativo, no intuito de apartar as águas pluviais do esgotamento sanitário, a fim de obter maior eficiência do tratamento no período chuvoso.
Implicações da gestão ambiental em microempresa de manutenção automotiva em Lajeado, Rio Grande do Sul, Brasil
Authors: Schmeier Nara Paula , Oliveira Wemerson de Castro
Published: August 2021

Diante da questão de como a implantação de práticas de gestão e educação ambiental em oficina de reparação automotiva pesada poderiam influenciar a sistemática de trabalho da empresa, objetivou-se com está pesquisa analisar a gestão de resíduos sólidos gerados nas atividades de uma oficina mecânica e identificar como práticas de gestão ambiental podem contribuir para a melhora do desempenho organizacional em termos de processos e serviços. A metodologia foi balizada por uma abordagem exploratória e descritiva mediante coleta de dados em duas etapas, (a) aplicação de um questionário estruturado com 12 perguntas, objetivas e discursivas, com todos os colaboradores e gestores da empresa, e (b) visitas técnicas para registro e tabulação das não conformidades baseadas em normativas ambientais. Com o estudo identificou-se conformidades e não conformidades na gestão ambiental da empresa e a partir disso, propostas de melhorias foram apresentadas para atendimento à legislação ambiental. Percebeu-se também que a equipe da empresa, gestores e colaboradores, apresenta compreensão e entendimento satisfatório frente às questões ambientais inerentes às atividades que desempenham. Por fim, conclui-se que as práticas de gestão ambiental adotadas pela empresa contribuíram na melhoria do seu desempenho organizacional interno, apesar destas práticas não serem percebidos por seus clientes.
Cultura do consumismo: uma revisão bibliográfica sistemática
Authors: Ferreira Janaina Gonçalves , Santos Maria Lícia dos , Nascimento Maria do Socorro Viana do
Published: August 2021

O consumismo é um dos fatores contributivos e influenciadores aos danos ambientais e na qualidade de vida. Neste sentido a Educação Ambiental nos anos iniciais de escolarização do indivíduo se faz importante pois é preciso estimular o desenvolvimento de um conjunto de atitudes e capacidades no aluno, para que eles investiguem, questionem, construam e utilizem os meios disponíveis ganhando autonomia ao longo da aprendizagem. O presente artigo tem como finalidade apresentar uma revisão sistemática da literatura sobre o consumismo entre o público infantil em publicações realizadas nos últimos 29 anos. O levantamento de dados ocorreu entre setembro de 2019 e julho de 2020 e cruzou o unitermo Consumismo com Mídia, Propaganda, Consumismo infantil, Escola e Ambiente escolar e seus termos equivalente nas línguas inglesa e espanhola, destes foram selecionados 241 artigos, mas somente 18 artigos que responderam aos critérios de inclusão.
Padrões de distribuição geográfica de Passiflora L. subg. Decaloba (DC.) Rchb. (Passifloraceae s.s.)
Authors: Fernandes Natália Brandão Gonçalves , Milward-de-Azevedo Michaele Alvim
Published: August 2021

A distribuição geográfica de espécies vegetais, tem sido foco de vários estudos ao longo do tempo, principalmente para determinação de padrões de distribuição que caracterizem a área de preferência das espécies. A Família Passifloraceae sensu stricto possui desde espécies de ampla distribuição, até táxons muito restritos. O subgênero Decaloba, pertencente ao gênero Passiflora, possui distribuição tropical e subtropical e abrange cerca de 235 espécies, divididas em oito superseções. Foram levantados os dados de ocorrência das espécies do subgênero Decaloba nos sítios eletrônicos dos herbários virtuais. A plotagem dos mapas foi realizada com auxílio do SimpleMappr. A maior parte das espécies ocorre na América Central e do Sul, enquanto uma pequena parte dividiu-se entre a Ásia e Oceania, em diferentes padrões biogeográficos.
Aspectos ambientais relacionados à síntese, utilização e descarte do grafeno
Authors: Azevedo Paulo Gabriel Ferreira de , Pinto Caio de Oliveira , Santos Luana Kelly de Jesus , Silva Ivan Costa da , Farias Cláudia Teresa Teles , Cavalcanti Luiz Antônio Pimentel
Published: August 2021

O grafeno vem ganhando notoriedade e sendo amplamente estudado e aplicado devido às suas excelentes propriedades físicas e químicas; com isso, à medida que se aumenta o interesse na sua utilização, cresce também a necessidade de compreender como este nanomaterial
relaciona-se com o meio ambiente, posto à importância do desenvolvimento sustentável. Para tal, este artigo apresenta uma revisão integrativa da literatura sobre o grafeno e seus derivados, objetivando abordar as seguintes frentes: (i) resíduos gerados na produção do grafeno e como estes rejeitos podem impactar o meio ambiente, bem como sugestões de gerenciamento destes visando à redução dos impactos, (ii) após sua produção, a forma como o grafeno pode ser aplicado, de modo a tornar os processos ambientalmente mais amigáveis, e, por fim, (iii) como o descarte irregular desse produto, após o seu uso, pode impactar o meio ambiente. A revisão foi realizada selecionando trabalhos que abordassem o grafeno e seus derivados nas instâncias supracitadas. Desses trabalhos, pôde-se observar que (i) a síntese do grafeno gera resíduos que podem ser devidamente tratados, com processos de purificação, extração, entre outros; (ii) há uma ampla aplicação do grafeno no setor energético, sobretudo, o solar, além do seu uso como adsorventes em tratamentos de efluentes; e, por fim (iii) notou-se que os resíduos de grafeno (e de outros nanomateriais de carbono) podem impactar negativamente o meio ambiente (seja aquático, no solo ou no ar), tornando necessárias políticas de controle.
Modeling of transient flows in viscoelastic pipe network with partial blockage
Authors: Chahardah-Cherik Parvin , Fathi-Moghadam Manoochehr , Haghighipour Sadegh
Published: August 2021

In this study, transient flow and partial blockage in polyethylene (PE) pipe network are investigated experimentally and numerically using the method of characteristics in the time domain considering pipe-wall viscoelasticity. The experiments were conducted on a PE pipe network with and without partial blockage. The experimental pressure signals were damped during a short period of time in the blockage-free case. The numerical model was calibrated by the inverse transient analysis (ITA). The hydraulic transient solver calibrated with one Kelvin–Voigt element showed good consistency with the experimental results. Partial blockages with different lengths and sizes were examined at different locations of the pipe network. Results reveal an increase in head loss, pressure signal damping, and phase shift with increase in blockage. In addition, the location and characteristics of blockages with different sizes were determined using the ITA in the pipe network.
Нетривиальная зависимость спектральных характеристик экситонов в квантовых ямах от мощности резонансного оптического возбуждения
Authors: Мурсалимов Д.Ф. , Михайлов А.В. , Курдюбов А.С. , Трифонов А.В. , Игнатьев И.В.
Published: August 2021

Basic exciton parameters, the energy of exciton transition and the radiative and nonradiative broadenings, are experimentally studied by means of reflectance spectroscopy for a heterostructure with the 14-nm GaAs/AlGaAs quantum well. Particular attention is paid to the nonradiative broadening which is sensitive to optical creation of free carriers and long-lived nonradiative excitons. A sublinear increase of the broadening of the heavy-hole and light-hole exciton resonances is observed when the light-hole exciton resonance is excited with increasing power. A simple model is developed, which allows one to well reproduce the observed dependence.
Влияние параметров квантовой ямы на спектр двумерных плазмонов в гетероструктурах HgTe/CdHgTe
Authors: Алешкин В.Я. , Дубинов А.А.
Published: August 2021

Теоретически изучено влияние параметров квантовой ямы и пространственной дисперсии электронной поляризуемости на зависимость энергии двумерных плазмонов от волнового вектора в узкозонных квантовых ямах CdHgTe (ширина запрещенной зоны 35 мэВ). Показано, что при энергиях >20 мэВ закон дисперсии двумерных плазмонов близок к линейному. Учет конечной ширины квантовой ямы уменьшает фазовую скорость плазмона. Этот эффект увеличивается с ростом доли кадмия в слое квантовой ямы при сохранении ширины запрещенной зоны и с уменьшением концентрации носителей заряда в ней. Ключевые слова: двумерные плазмоны, квантовые ямы HgTe.
Сравнение гетероструктур А-=SUP=-III-=/SUP=-В-=SUP=-V-=/SUP=-, выращенных на платформах Ge/Si, Ge/SOI и GaAs
Authors: Сушков А.А. , Павлов Д.А. , Андрианов А.И. , Шенгуров В.Г. , Денисов C.А. , Чалков В.Ю. , Крюков Р.Н. , Байдусь Н.В. , Юрасов Д.В. , Рыков А.В.
Published: August 2021

AIIIBV/Ge/Si (001), AIIIBV/Ge/SOI (001), and AIIIBV/GaAs (001) heterostructures were formed and investigated. The Ge buffer layer was produced by the "hot wire" technique on a Si substrate (001) for the AIIIBV/Ge/Si structure. In the case of the AIIIBV/Ge/SOI, the Ge buffer layer was grown on the SOI (001) substrate by molecular beam epitaxy via two-stage growth. The growth of AIIIBV layers were performed by metalorganic chemical vapor deposition. It is shown that the Ge/SOI formed via two-stage growth allows the growth of AIIIBV layers that are not inferior in structural and optical quality to those formed on the Ge/Si.
Монополярное умножение горячих носителей заряда в полупроводниках A-=SUP=-III-=/SUP=-B-=SUP=-V-=/SUP=- в сильном электрическом поле и бесшумные лавинные фотодиоды (О б з о р)
Authors: Михайлова М.П. , Дмитриев А.П. , Андреев И.А. , Иванов Э.В. , Куницына Е.В. , Яковлев Ю.П.
Published: August 2021

The results of theoretical and experimental studies of impact ionization processes and charge carrier heating in multi-valley A3B5 semiconductors at high electric field are presented and their relationship with the features of the band structure is discussed. A role of subsidiary L- and X-valleys, complex structure of the valence band and orientation dependence of the ionization coefficients are taken into account. A new approach to the choice of semiconductor materials with a large ratio of the ionization coefficients of holes and electrons to create the noiseless avalanche photodiodes due to monopolarity of hot charge carrier multiplication is proposed.
Рентгеноструктурный и дифференциальный сканирующий калориметрический анализ CuInZnSe-=SUB=-3-=/SUB=-
Authors: Ибрагимова С.И. , Джабаров С.Г. , Гусейнов Г.Г. , Гулиева Х.М. , Мирзаев М.Н. , Алыев Ю.И.
Published: August 2021

Синтезировано соединение CuInZnSe3, исследованы кристаллическая структура методом рентгеновских дифракций и термические свойства методом дифференциального сканирующего калориметрического анализа. Обнаружено, что в нормальных условиях кристаллическая структура этого соединения соответствует кубической симметрии с пространственной группой F-43m (216). При постоянной скорости термообработки получена температурная зависимость функции теплового потока в интервале температур T=30-900oC. Наблюдаемые эндоэффекты при T=430, 600 и 756oC объяснены резонансом тепловых колебаний атомов в кристаллической структуре соединения CuInZnSe3 и высвобождением относительно слабосвязанных атомов. Ключевые слова: рентгеновская дифракция, полупроводники, халькогениды.
Свойства податливых подложек на основе пористого кремния, сформированных двухстадийным травлением
Authors: Середин П.В. , Леньшин А.С. , Khuder Abduljabbar Riyad , Голощапов Д.Л. , Хараджиди М.А. , Арсентьев И.Н. , Касаткин И.А.
Published: August 2021

Сообщается о влиянии режимов травления и их комбинации на дизайн, микроструктурные и оптические свойства податливых подложек на основе пористого кремния. На основе данных комплекса микроструктурных и спектроскопических методов анализа показано, что при неизменных параметрах кристаллической решетки величина остаточных напряжений, размер кристаллитов, объем кристаллической фракции, а также отражательная способность и энергия прямых переходов в пористом слое кремния зависят от комбинации режимов травления, однако не всегда коррелируют с величиной пористости слоя, рассчитанной из анализа SEM изображений. Ключевые слова: Si, пористый слой, податливая подложка.
Структурные и газочувствительные характеристики тонких полупроводниковых пленок PdO различной толщины при детектировании озона
Authors: Рябцев С.В. , Гхариб Д.А.А. , Турищев С.Ю. , Обвинцева Л.А. , Шапошник А.В. , Домашевская Э.П.
Published: August 2021

PdO films were obtained by thermal deposition of palladium metal with a thickness of 30 and 90 nm, followed by its oxidation in air at different temperatures. PdO oxide films are characterized by transmission electron microscopy (TEM) and reflection high-energy electron diffraction (RHEED). Data on the semiconductor properties and gas sensitivity to different concentrations of ozone in the air are obtained. The optimal temperature conditions for the oxidation of the films are established, which ensure their uniform phase composition and the absence of electrical noise during the detection of gases. The mechanism of the electrical noise appearance in ultrathin films associated with their fragmentation during oxidative annealing is proposed and justified. The possibility of detecting ozone impurities in the air below the maximum permissible concentration (MPC) by PdO semiconductor films is shown.
Состав и морфология поверхности Si(111) с поверхностной пленкой SiO-=SUB=-2-=/SUB=- разной толщины
Authors: Умирзаков Б.Е. , Донаев С.Б. , Ёркулов Р.М. , Ашуров Р.Х. , Ротштейн В.М.
Published: August 2021

In this work, the composition, morphology, and electronic structure of SiO2 nanofilms of various thicknesses, created by thermal oxidation on the Si(111) surface, have been studied. It is shown that up to a thickness of 30–40 Å, the film has an island character. At d ≥ 60 Å, a homogeneous continuously film of SiO2 is formed and the stoichiometric surface roughness of which does not exceed 1.5 - 2 nm. Regardless of the film thickness of the SiO2 appreciable interdiffusion of atoms at the interface SiO2-Si not observed. The regularities of the change in the composition, the degree of surface coverage, and the energy of plasma oscillations with a change in the thickness of the SiO2/Si(111) films in the range from 20 to 120 Å have been determined.
Исследование параметров двумерного электронного газа в квантовых ямах InGaN/GaN методом терагерцового плазмонного резонанса
Authors: Бурмистров Е.Р. , Авакянц Л.П.
Published: August 2021

A new approach to determining the parameters of a two-dimensional electron gas in InGaN/GaN quantum wells is proposed. It is based on the method of terahertz spectroscopy with time resolution, within the framework of which the terahertz frequencies of two-dimensional plasmon resonances excited in the studied samples of InGaN/AlGaN/GaN heterostructures by femtosecond laser pulses at a wavelength of 797 nm were recorded. Oscillating behavior of the output terahertz radiation power with minima in the frequency range 1−5 THz is shown, which is associated with the excitation of plasmon oscillations in a two-dimensional electron gas localized in an InGaN/GaN quantum well. During the processing of terahertz spectra, the effect of renormalization of the effective mass of two-dimensional electron gas, as well as phase modulation near the frequencies of plasmon resonances with an increase in the temperature of the sample from 90 to 170 K, was found. The proposed method is non-contact and can be used in a wide temperature range.
Энергетический спектр и спектр оптического поглощения фуллерена C-=SUB=-26-=/SUB=- в модели Хаббарда
Authors: Силантьев А.В.
Published: August 2021

Anticommutator Green’s functions and energy spectra of fullerene C26 and endohedral fullerene U@C26 with the D3h symmetry groups have been obtained in an analytical form within the Hubbard model and static fluctuation ap-proximation. The energy states have been classified using the methods of group theory, and the allowed transitions in the energy spectra of molecules C26 and U@C26 with the D3h symmetry groups have been determined.
Translanguaging in an EFL classroom discourse: To what extent it is helpful for the students?
Authors:   Department of English Language Education, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia, Berlianti Dinda Gusti Ayu , Pradita Intan
Published: August 2021

Translanguaging is a tool for bilingual or multilingual to learn more than one language.  In the field of linguistic, translanguaging is not something new. However, its implementation is still found rare in higher education. To fill this void, this study aims to investigate the implementation of translanguaging in classroom, especially in higher education. This research was intended to answer how helpful translanguaging practices in EFL Classroom is. By using qualitative method, the data were collected by recording two credits full face-to-face classroom interaction. One lecturer and her forty-five students voluntarily became the research participants.  The data were then analyzed by using thematic analysis. The findings showed that the practices were helpful in a way that the tutors could build an engaging dialogue for the students, enabling them to understand the complex learning materials. These findings then implied that in the teaching and learning process, EFL lecturers tend to be more attentive as they prefer to have their students understanding on complex subject to build English proficiency of their students’.
México frente al reto del conocimiento de frontera del emprendimiento social
Authors: Zerón Félix Mariana , Rubalcava de León Cristian Alejandro , De la Garza Cárdenas Manuel Humberto
Published: August 2021

Objetivo: analizar el estado del arte de la teoría del emprendimiento social (ES) a nivel internacional para evaluar su nivel de madurez y frontera del conocimiento del periodo 2015-2020, discutiendo la contribución de México a la literatura de las ciencias administrativas, ante la tendencia del es como medio de solución a las problemáticas sociales en el mundo.Diseño metodológico: en la cienciometría se encuentra la técnica de análisis conocida como bibliometría, la cual fue utilizada para realizar dos tipos de análisis: uno desde la perspectiva internacional del emprendimiento social; otro desde la perspectiva en México. Para finalizar se realiza un análisis descriptivo y comparativo.Resultados: en la base de datos bibliográficos de Web of Science se encontró la existencia de 682 artículos publicados sobre el tema de emprendimiento, y en la revisión bibliográfica exhaustiva de las revistas del Sistema de Clasificación de Revistas Mexicanas de Ciencia y Tecnología (CRMCYT), en el área de ciencias sociales y multidisciplinarias, la existencia de 81 artículos relacionados. Limitaciones de la investigación: la principal limitación es que en el CRMCYT la mayoría de las revistas no generan los reportes en los formatos requeridos por el software especializado para bibliometría (Bibliometrix). Hallazgos: el interés del ES en las áreas de gestión y emprendimiento es muy reciente, así que el presente análisis abre discusión sobre la necesidad de crear puentes conceptuales que denoten la realidad en México sobre el tema del ES.