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Environmentally-responsible corporate: Actions analysis of Latin American pulp and paper industry

Environmental Challenges 2021年 4卷

作者： Moraes, Douglas M. Silva, Paulo H. Rampasso, Izabela Simon Anholon, Rosley Quelhas, Osvaldo L.G. Farias Filho, José R. Toledo, Roberto F. School of Mechanical Engineering University of Campinas Mendeleyev Street 200 Campinas Brazil PNPD/CAPES Program Doctoral Program in Sustainable Management Systems Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil Master Program in Management Systems and Doctoral Program in Sustainable Management Systems Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil Department of Engineering Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil

This article aims to list environmental practices used by Latin American companies in the pulp and paper industry, to create a list, through a scientific method, that can direct other researchers and managers interested in the subject. The research strategies used were bibliographic research and content analysis. The content analysis used 36 sustainability reports published by Latin American companies in the industry between 2018 and 2019. Although 264 companies were mapped, only 36 of them presented sustainability report possible to be accessed. Through the sample of 36 sustainability reports, 36 sustainable environmental practices were identified that could be grouped into five groups, namely: (1) Reuse of waste, efficiency in the production process and effluents treatment;(2) Preservation and area recovery;(3) Energy efficiency;(4) Initiatives with stakeholders;(5) Control of gas emission. Despite the exploratory nature, the information presented here can be used by managers in the area and researchers interested in improving environmental practices of the pulp and paper industry. © 2021 The Author(s)

关键词： Environmental practices Latin America Pulp and paper industry

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Degradation of Formaldehyde Using a Mixture of Zn or Sn-Doped Tio2 and Zeolite Synthesized from Waste

SSRN

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SSRN 2023年

作者： Chang, Yu-Chi Chou, Feng-Chih Huang, Sz-Ping Chen, Ku-Fan Lin, Yuan-Chung Institute of Environmental Engineering National Sun Yat-Sen University Kaohsiung804 Taiwan Center for Emerging Contaminants Research National Sun Yat-Sen University Kaohsiung804 Taiwan Department of Civil Engineering National Chi Nan University Puli Nantou545 Taiwan Department of Public Health College of Health Science Kaohsiung Medical University Kaohsiung City807 Taiwan Doctoral Degree Program in Toxicology College of Pharmacy Kaohsiung Medical University Kaohsiung807 Taiwan

ormaldehyde (HCHO) is a significant volatile organic compound (VOC) commonly found in indoor air, leading to serious health implications upon exposure. This study investigates the photocatalytic degradation of formaldehyde using Zn or Sn-doped TiO2 as the photocatalyst. Microwave system is used not only for synthesizing aluminum slag and glass but for doping Sn and Zn into zeolite. The results showed that P25-TiO2 nanoparticles annealed at 400°C exhibited a higher intensity of anatase peaks, while TiO2 doped with 0.5 mol% Zn and Sn and annealed at 400°C showed stronger anatase peaks in the XRD patterns. SEM images displayed a surface morphology with fine flakes and flower-like structures after annealing at 400°C for Zn and Sn-doped TiO2, respectively. Photoluminescence analysis indicated that 0.5 mol% Zn-doped TiO2 exhibited a greater red shift and lower intensity. Among the various samples, TiO2 doped with 0.5 mol% Zn demonstrated the optimal photocatalytic efficiency for formaldehyde degradation, achieving the highest degradation efficiency of 75% within 40 minutes. 0.5 mol% Zn-doped TiO2 can effectively enhance the photocatalytic performance and degradation efficiency of formaldehyde due to reducing recombination centers. The hydroxycancrinite mixed TiO2 doped with 0.5 mol% Zn exhibited an increased specific surface area of 95.5 m2 g−1. Under visible light, formaldehyde degradation reached saturation within 20 minutes, resulting in an efficiency of 20.1%. Both photodegradation and adsorption was used for formaldehyde degradation. The study provides the development of efficient materials for indoor air treatment and pollutant degradation. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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Theory-guided randomized neural networks for decoding medication-taking behavior

Theory-guided randomized neural networks for decoding medica...

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2021 IEEE EMBS International Conference on Biomedical and Health Informatics, BHI 2021

作者： Kaur, Navreet Gonzales, Manuel Alcaraz, Cristian Garcia Barnes, Laura E. Wells, Kristen J. Gong, Jiaqi Department of Engineering Systems and Environment University of Virginia VA22904 United States SDSU UC San Diego Joint Doctoral Program in Clinical Psychology San DiegoCA92120 United States Department of Psychology San Diego State University San DiegoCA92182 United States Department of Computer Science The University of Alabama TuscaloosaAL35487 United States

ISBN: (纸本)9781665403580

Long-term endocrine therapy (e.g. Tamoxifen, aromatase inhibitors) is crucial to prevent breast cancer recurrence, yet rates of adherence to these medications are low. To develop, evaluate, and sustain future interventions, individual-level modeling can be used to understand breast cancer survivors' behavioral mechanisms of medication-taking. This paper presents interdisciplinary research, wherein a model employing randomized neural networks was developed to predict breast cancer survivors' daily medication-taking behavior based on their survey data over three time periods (baseline, 4 months, 8 months). The neural network structure was guided by random utility theory developed in psychology and behavioral economics. Comparative analysis indicates that the proposed model outperforms existing computational models in terms of prediction accuracy under conditions of randomness. © 2021 IEEE

关键词： Diseases

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The potential utilization of natural materials as a wall covering of the building in heat reduction 8

The potential utilization of natural materials as a wall cov...

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8th Annual International Conference 2018 on Science and engineering, AIC-SE 2018

作者： Jeumpa, K. Doctoral Study Program of Technology and Vocational Education Faculty of Engineering Padang State University Indonesia

This paper aims to examine the potential of natural coco fibre to be utilized as a wall covering in building construction for sun radiation protection. engineering innovation in building construction to control the building's temperature is important. Lowering the building's room temperature can be carried out by modifying the wall construction materials. Thus, the usage of an air conditioner which is not environmentally friendly can be reduced. The wall modification can give more protection and dampen the sun's heat, hence the thermal comfort can be obtained. Natural materials, moreover, can be used in the wall modification to reduce the room temperature. In this study, a comparative analysis was carried out between two materials: (1) the coco fibre coated with cement mixture;(2) the mixture of cement and sand, both were used as materials to plaster the wall. The cement mixture acted to bind the compacted coco fibre sheets. The material was evaluated after the cement mixture had been hardened. The test was carried out by providing heat on one side and measuring the temperature on the other side of the material. The results were significant between the two materials. This indicates the potential of coco fibre as a heat insulation in the wall construction materials that can minimize solar thermal radiation into the room. © Published under licence by IOP Publishing Ltd.

关键词： Room temperature

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Limocitrin induced cellular death through ERK pathways in human oral squamous cell cancer

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Scientific Reports 2025年第1期15卷 1-10页

作者： Velmurugan, Bharath Kumar Lin, Chia-Chieh Kao, Min-Yun Ho, Hsin-Yu Lo, Yu-Sheng Chuang, Yi-Ching Hsieh, Ming-Ju Maitocon Laboratory Tirupur 641604 India Oral Cancer Research Center Changhua Christian Hospital Changhua 50006 Taiwan Graduate Institute of Clinical Medicine College of Medicine National Chung Hsing University Taichung 402202 Taiwan Doctoral Program in Tissue Engineering and Regenerative Medicine College of Medicine National Chung Hsing University Taichung 402 Taiwan Graduate Institute of Biomedical Sciences China Medical University Taichung 404 Taiwan

This study sought to investigate the anticancer efficacy of limocitrin on two distinct human oral cancer cell lines. At first, we evaluated the effect of limocitrin on the proliferation of OSCC cells (SCC-9 and SCC-47) using MTT and colony formation assays. Limocitrin treatment increased cell cycle arrest at G2/M phase, induced caspase-related apoptosis (cleaved caspase-3, caspase-8, caspase-9 and PARP expression) in OSCC cells. Limocitrin treatment inhibited Bcl-2 and Bcl-XL and induced Bax, Bak expression in both SCC-9 and SCC-47 cell lines. Limocitrin treatment inhibited cyclin E1, E2, CDK2, CDK4, and CDK6 and increased p21 expression. Limocitrin also exhibited an inhibitory effect on the phosphorylation of AKT, ERK1/2 and JNK in a dose-dependent manner. Additionally, pretreatment of oral cancer cells with U0126 resulted in increased cleaved caspase-3 and caspase-8 and PARP expression. Furthermore, limocitrin treatment decreased XIAP, cIAP1, HSP27 protein expression than control group. Combined treatment with limocitrin and si-XIAP significantly increased cleaved PARP, caspase-3 and -8 expressions in SCC-9 cells. Overall, this evidence indicates that limocitrin may serve as an effective anticancer agent for the treatment of oral cancer. © The Author(s) 2025.

关键词： AKT Apoptosis ERK JNK Limocitrin Mitochondria OSCC

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FetalNet: Low-light fetal echocardiography enhancement and dense convolutional network classifier for improving heart defect prediction

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Informatics in Medicine Unlocked 2022年 35卷

作者： Sutarno, Sutarno Nurmaini, Siti Partan, Radiyati Umi Sapitri, Ade Iriani Tutuko, Bambang Naufal Rachmatullah, Muhammad Darmawahyuni, Annisa Firdaus, Firdaus Bernolian, Nuswil Sulistiyo, Deny Intelligent System Research Group Faculty of Computer Science Universitas Sriwijaya Indonesia Doctoral Program Faculty of Engineering Universitas Sriwijaya Indonesia Faculty of Medicine Universitas Sriwijaya Indonesia Division of Fetomaternal Department of Obstetrics and Gynaecology Mohammad Hoesin General Hospital Indonesia

Background: Fetal heart defect (FHD) examination by ultrasound (US) is challenging because it involves low light, contrast, and brightness. Inadequate US images of fetal echocardiography play an important role in the failure to detect FHDs manually. The automatic interpretation of fetal echocardiography was proposed in a previous study. However, the low quality of US images reduces the prediction rate of computer-assisted diagnosis results. Methods: To increase the FHD prediction rate, we propose low-light fetal echocardiography enhancement stacking with a dense convolutional network classifier named “FetalNet.” Our proposed FetalNet model was developed using 460 US images to produce an image enhancement model. The results showed that all raw US images could be improved with satisfactory performance in terms of increasing the peak signal-to-noise ratio of 30.85 dB, a structural similarity index of 0.96, and a mean squared error of 18.16. Furthermore, all reconstructed images were used as inputs in a convolutional neural network to generate the best classifier for predicting FHD. Results: The proposed FetalNet model increased the FHD prediction rate by approximately 25% in terms of accuracy, sensitivity, and specificity and produced 100% predictive negative using unseen data. Conclusions: The proposed deep learning model has the potential to identify FHD accurately and shows potential for practical use in identifying congenital heart diseases in the future. © 2022 The Author(s)

关键词： Congenital heart disease Deep learning Low light image enhancement Ultrasound

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Characteristics of bio-oils produced from corn husk by pyrolysis techniques

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AIP Conference Proceedings 2024年第1期3082卷

作者： Leni Maulinda Husni Husin Nasrul Arahman Cut Meurah Rosnelly Fahrizal Nasution M. Rizki Syahrul Fahmi Nadya Bilqis Mario Febrianto Doctoral Program School of Engineering Universitas Syiah Kuala Darussalam Banda Aceh 23111 Indonesia Department of Chemical Engineering Universitas Malikussaleh Lhokseumawe 24351 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia

Biomass is a naturally abundant substance that contains lignin, cellulose, and hemicellulose, which have the potential to be utilized as bio-oil. Agriculture-derived corn husk waste is a possible raw material for biofuel production. Currently, corn husk waste is not optimally utilized. This research proposes to utilize maize husk waste as biofuel feedstock using a fast pyrolysis process. Bio-oil was produced using pyrolysis at 450 °C for 30, 60, 90, and 120 minutes while nitrogen gas was present. Using FT-IR and GC-MS techniques, the characteristics of bio-oil were determined. During 60 minutes, the maximum yields of bio-oil, bio-char, and gas were 44.24 wt%, 24.79 wt%, and 30.95 wt%, respectively. Bio-oil has a calorific value of 21,945 MJ/kg. These results are consistent with the features of biofuels’ typical calorific value. Based on the Indonesian national standard (SNI) and ASTM D7544-12 standards for liquid biofuels, the quality of bio-oil extracted from maize husks satisfies the quality requirements.

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Pyrolysis study of coconut leaf's biomass using thermogravimetric analysis 1

Pyrolysis study of coconut leaf's biomass using thermogravim...

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1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Rajendra, I.M. Winaya, I.N.S. Ghurri, A. Wirawan, I.K.G. Study Program of Doctoral Engineering Sciences Faculty of Engineering University of Udayana Indonesia Study Program of Mechanical Engineering Faculty of Engineering University of Udayana Indonesia Mechanical Engineering Department Bali State Polytechnic Indonesia

Coconut leaf is one of the most potential biomass to be converted into bio-oil through pyrolysis process and the availability in Indonesia is abundance. The mechanism of decomposition of coconut leaf into bio-oil productions requires further research because of the complexity of pyrolysis and differences in biomass composition. Therefore, the design, optimization and modeling of pyrolysis processes is strongly influenced by biomass characteristics. The purpose of this study was to find the characteristic differences in pyrolysis behavior of the three main parts of coconut leaf based on its constituent parts;leaflets, midrib and whole leaf. Moisture is removed by drying the sample in an electric oven at 110°C for 24 hours. Characteristics were tested using Cellulose Analysis, Ultimate Analysis, and Heat Value, whereas pyrolysis behavior used Thermogravimetric Analyzer (TGA). The results show that leaflets, midrib and whole leaf exhibit different pyrolysis behavior. In terms of considering flow process of separation, the whole leaf becomes an option as a fuel for further pyrolysis processes. The maximum temperature that as a reference in the pyrolysis process of coconut leaves is 500°C with temperature rate of 20°C/min and the process lasts as long for 130 minutes. © Published under licence by IOP Publishing Ltd.

关键词： Pyrolysis

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The impact of climate change on community, culture, and gender in Central Kalimantan 1

The impact of climate change on community, culture, and gend...

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1st International Symposium of Earth, Energy, Environmental Science and Sustainable Development, JESSD 2020

作者： Marlina, Sari Supriyono Lautt, Bambang Usup, Aswin Sunaryati, Revi Environmental Engineering Study Program School of Environmental Sciences Postgraduate School of Palangkaraya University Palangkaraya73111 Indonesia Head of Environmental Sciences Doctoral Program in Palangkaraya University Palangkaraya73111 Indonesia Head of LPPM Palangkaraya Univesity Palangkaraya University Palangkaraya73111 Indonesia Lecturer of Economics Social Faculty of Agriculture Palangkaraya University Palangkaraya73111 Indonesia

The impacts of climate change in the last decade are tropical storms, rising sea levels, and forest fires. These impacts damage human health, natural resources, and gender equality. This study aimed to identify the effects of climate change in the community, cultural development, and gender roles in addressing climate change in Central Kalimantan. This study used a cross-sectional design with questionnaires. Data collection was carried out using interview and observation techniques with a purposive sampling method. Interviews were conducted with 30 respondents in each district. The results of the study showed that the community has long felt climate change in Central Kalimantan. Still, they do not yet understand that changes in rainfall and temperature patterns reduce environmental conditions and forests' function to support daily life. The openness of access to natural resources for women gives the responsibility of maintaining families during climate change, for example, utilizing plants to be used as weaving material in managing wet and dry forest ecosystems that increase deforestation rates. In the future, stakeholders, including regional government, will issue policies that protect women's rights and interests to ensure that women get the same access and benefits related to information and decision-making, especially in natural resources management. © The Authors, published by EDP Sciences, 2020.

关键词： Climate change

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The role of transformational leadership, work environment, motivation on job satisfaction and teachers performance of vocational schools

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AIP Conference Proceedings 2023年第1期2765卷

作者： Edy Siswanto Samsudi Eko Supraptono Yeri Sutopo Agus Purwanto Doctoral Program Students in Educational Management Universitas Negeri Semarang Semarang 50229 Indonesia Mechanical Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Electrical Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Civil Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Doctoral Program Students in Management Universitas Pelita Harapan Tangerang 15811 Indonesia

The purpose of this study was to analyze the effect of job satisfaction, motivation, Transformational leadership, work on jobs and teachers’ performance of vocational schools. This research uses quantitative methods to test and prove the hypotheses that have been made through various tests and data processing. The research hypothesis testing was carried out by using the Structural Equation Model (SEM) approach based on Partial Least Square (PLS). The population used in this study is vocational schools’ teachers in Pati Central Java, Indonesia. The number of respondents in this study is 110 respondents of vocational teachers who have worked at least 1 years in their schools, data obtained from the distribution of online questionnaires with snowball sampling method. Based on the results of hypothesis testing data processing using SmartPLS software, the results obtained that job satisfaction, motivation, job satisfaction, transformational leadership, work environment has a positive and significant effect on teachers’ performance of vocational schools.

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