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Biorenewable materials for water remediation: The central role of cellulose in achieving sustainability

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Journal of Bioresources and Bioproducts 2024年第3期9卷 253-282页

作者： Kirti Mishra Samarjeet Singh Siwal Thandiwe sithole Nirankar Singh Phil Hart Vijay Kumar Thakur Department of Chemistry M.M.Engineering CollegeMaharishi Markandeshwar(Deemed to be University)Haryana 133207India Department of Chemical Engineering University of JohannesburgDoornfontein 2088South Africa Biorefining and Advanced Materials Research Center Scotland’s Rural CollegeEdinburgh EH93JGUnited Kingdom Renewable and Sustainable Energy Research Centre Technology Innovation InstituteAbu Dhabi 9639United Arab Emirates School of Engineering University of Petroleum&Energy StudiesDehradun 248007India

As the population increases and manufacturing grows,greenhouse gas and other harmful emissions *** with chemicals such as dyes,pesticides,pharmaceuticals,oil,heavy metals or radionuclides,wastewater purification has become an urgent *** technologies exist that can remove these contaminants from wastewater sources,but they often demand high energy and/or high cost,and in some cases produce contaminant laden sludge that requires safe *** need for methods which are less capital intensive,less operationally costly and more environmentally friendly is ***-based materials have emerged as promising candidates for wastewater treatment due to their renewability,low cost,biodegradability,hydrophilicity,and antimicrobial *** this review article,we focussed on developing sustainable and biodegradable cellulose-based materials for wastewater *** article deals with cellulose-based materials’scope and their conversion into valuable products like hydrogel,aerogel,cellulose composites,and *** cellulose-based materials have no harmful environmental impact and are *** modified cellulose-based materials applying as membrane,adsorbent,sorbent,and beads to purify the wastewater were ***,the challenges and future prospects of cellulose-based materials for wastewater treatment were considered,emphasizing their potential to be sustainable and eco-friendly alternatives to traditional materials used in wastewater treatment.

关键词： Cellulose Wastewater treatment Hydrogel Nanocrystal Cellulose membrane

An Assessment on the Impact of Technological Addiction on Workplace Productivity: Case of the Public Sector in Zimbabwe

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World Journal of Engineering and Technology 2024年第3期12卷 635-650页

作者： Nelson Matanana Prosper Tafadzwa Denhere David Chibhoyi Allen Mutumwa sithole Morgen Noah Ariel Mutongoreni Department of Computer Science and Information Systems at Manicaland State University of Applied Sciences Mutare Zimbabwe Department of Human Resources Management at Manicaland State University of Applied Sciences Mutare Zimbabwe Department of Applied Business Sciences at Manicaland State University of Applied Sciences Mutare Zimbabwe

With the increasing integration of technology in modern workplaces, concerns have emerged regarding the addictive nature of technology and its potential consequences on employee productivity. This research aims to investigate the impact of technological addiction on workplace productivity within the public sector of Zimbabwe. The study employed a mixed-methods approach, combining surveys, interviews, and a case study analysis, to examine the prevalence and effects of technological addiction in affecting productivity in the public sector of Zimbabwe. The findings indicate that excessive use of social media, and other digital distractions is a growing concern in the public sector, leading to decreased focus, missed deadlines, and strained teamwork. Factors such as unrestricted internet access, lack of clear usage policies, and inadequate self-regulation contribute to the problem The research outcomes also highlight the need for awareness and interventions to address social media addiction in the workplace, promote healthier technology use, and uphold productivity and employee well-being.

关键词： Technology Addiction Workplace Productivity Technology Public Sector Zimbabwe

Synthesis and characterization of Ce_(0.6)Sr_(0.4)Fe_(0.8)Co_(0.2)O_(3–δ) perovskite material:Potential cathode material for low temperature SOFCs

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Journal of Rare Earths 2017年第4期35卷 389-397页

作者： Mlungisi N.sithole Bernard Omondi Patrick G.Ndungu School of Chemistry and Physics University of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban4000South Afrzca Department of Applied Chemistry Doornfontein Campus University of JohannesburgP.O.Box 1701 lDoornfontein 2028JohannesburgSouth.Africa

A sol-gel method and a modified chemical vapour deposition technique were used to produce nanostructured Ce0.6Sr0.4Fe0.8Co0.2O3-δ materials at temperatures as low as 400 ℃. Powders were characterized using Fourier transform infrared spectroscopy （FTIR）, Raman spectroscopy, thermo gravimetric analysis, powder X-ray diffraction （XRD）, scanning electron microscopy （SEM） with energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy （HRTEM）, and nitrogen sorption at 77 K. FTIR spectra showed that the sol-gel method resulted in residual carbon groups on the materials after calcination, while the Raman and XRD analysis confirmed that both synthesis methods resulted in cubic perovskite structure. However, the chemical va- pour deposition （CVD） method resulted in materials with a smaller crystallite size when compared to those prepared via the sol-gel route. The overall morphology of the powders was irregularly shaped aggregated particles as observed by SEM and HRTEM. In addition, HRTEM analysis showed that the materials were highly crystalline. Textural analysis revealed the powders had some mesoporosity, and the surface areas were 76.69 and 65.90 m2/g for materials synthesized using the CVD and sol-gel methods, respectively. The synthesized perovskite powders were used to fabricate button cells employing samarium doped ceria （SDC） as the electrolyte and NiO/SDC as the anode materials. As cathode materials, the maximum power density observed was 308.4 mW/cm2 at 500℃.

关键词： nanostructured materials low temperature SOFCs perovskites ceria rare earths

The Relevance of International Financial Reporting Standards for Small and Medium-Sized Entities （IFRS for SMEs） in Swaziland

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Journal of Modern Accounting and Auditing 2015年第8期11卷 383-402页

作者： Seedwell Tanaka Muyako sithole University of Wollongong Wollongong Australia

The purpose of this study is to explore the relevance of adopting International Financial Reporting Standards （IFRS） for small and medium-sized entities （SMEs） in Swaziland. The study further seeks to determine if IFRS for SMEs can be the solution to better reporting by local SMEs. There has been a growing need for different reporting standards for small firms and big firms over the years due to the unique challenges and attributes they face especially in the area of financial reporting. This research is based on a statistical analysis of questionnaires completed by accountants from SMEs in Swaziland as well as other stakeholders who have a direct or an indirect interest in the financial statements of SMEs. These stakeholders included audit firms and the financial institutions. The sampling rate of 10% was applied across each industry to come up with a sample of 60 SMEs. Furthermore, a 100% sampling rate on the other stakeholders was applied. These were nine financial institutions and eight audit finns. The findings from the study revealed that SMEs in Swaziland are having challenges with the current reporting framework but to some extent, the framework is suitable. Most SMEs are not aware of IFRS for SMEs, therefore the accounting profession in Swaziland （SIA） has a huge role to play in training auditors and accountants in the country. Overall, IFRS for SMEs is applicable in Swaziland.

关键词： relevance International Financial Reporting Standards (IFRS) small and medium-sized entities (SMEs)

Lookup Table Hough Transform for Real Time Range Image Segmentation and Featureless Co-Registration

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Journal of Sensor Technology 2012年第3期2卷 148-154页

作者： Ben Gorte George sithole Department of Geomatics University of Cape Town Rondebosch South Africa Department of Geoscience and Remote Sensing Delft University of Technology Delft Netherlands

The paper addresses range image segmentation, particularly of data recorded by range cameras, such as the Microsoft Kinect and the Mesa Swissranger SR4000. These devices record range images at video frame rates and allow for acquisition of 3-dimensional measurement sequences that can be used for 3D reconstruction of indoor environments from moving platforms. The role of segmentation is twofold. First the necessary image co-registration can be based on corresponding segments, instead of corresponding point features (which is common practice currently). Secondly, the segments can be used during subsequent object modelling. By realisising that planar regions in disparity images can be modelled as linear functions of the image coordinates, having integer values for both domain and range, the paper introduces a lookup table based implementation of local Hough transform, allowing to obtain good segmentation results at high speeds.

关键词： Range Camera Range Image Segmentation Hough Transform Co-Registration

Closing the Gaps in Disaster Management and Response:Drawing on Local Experiences with Cyclone Idai in Chimanimani,Zimbabwe

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International Journal of Disaster Risk Science 2020年第5期11卷 655-666页

作者： Nelson Chanza Pakama Q.Siyongwana Leizel Williams-Bruinders Veronica Gundu-Jakarasi Chipo Mudavanhu Vusomuzi B.sithole Albert Manyani Geography Department Bindura University of Science EducationBinduraZimbabwe School of Biology and Environmental Sciences University of Mpumalanga.Nelspruit-Mbombela 1200South Africa Department of Geosciences Nelson Mandela UniversityPort Elizabeth 6031South Africa Infrastructure Development Bank of Zimbabwe(IDBZ) HarareZimbabwe United Nations Development Program(UNDP) HarareZimbabwe

Cyclone Idai in Zimbabwe exposed deficiencies in the country's disaster management *** study uses a phenomenological case exploration of the experiences of local residents in Rusitu Valley following cyclone-induced floods that affected the area in March *** capturing narratives of participants who were recruited through chain referrals,the research intends to understand how local actors,utilizing their local-based response systems,managed to fill in the voids that characterize disaster management practice in *** show that the participation of local"heroes"and"Samaritans,"by deploying their social networks,norms,relationships,practices,and modest ingenuity,helped to speed up response times and minimize threats to lives and *** of the stories of local actors about their disaster experiences also gives a richer picture of the Cyclone Idai *** the community response system also facilitated the operation of external disaster management agencies,their premature withdrawal tended to weaken the trust and values existing in the area,and created tensions between the disaster-affected people and other *** the delays in formal responses by the government and other external relief agencies,the practices of local actors,although spontaneous and largely uncoordinated,offer rich insights into the design and development of disaster management regimes.

关键词： Cyclone Idai Flood disaster management Local knowledge and action Social networks Zimbabwe

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滤波算法比较

导航定位学报 2004年第2期 12-14页

作者： George sithole George Vosselman 梁欣廉 Department of Geodesy Faculty of Civil Engineering and GeosciencesDelft University of Technology

1 介绍与商业机载激光扫描(ALS)系统的发展相比,为特定应用选择适合的(自动、半自动)数据处理方法还处于研究阶段。其中。

关键词：激光雷达图像分类滤波算法数字高程模型

腐植酸作为天然有机物(NOM)的主要类型对环糊精聚氨酯去除水中异味的影响

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腐植酸 2010年第5期 29-32页

作者： BB Mamba RW Krause TJ Malefetse SP sithole TI Nkambule 李静南非约翰内斯堡大学化工系中国农业科学院研究生院北京100080

目前,水处理机构普遍认为,天然有机物会妨碍活性炭的吸附位点与异味化合物结合,进而导致对甲萘烷醇和2-甲基异茨醇的清除效率下降。腐植酸也被认为具有相同的作用。对于城市水处理系统来说,饮用水中异味化合物如甲萘烷醇和2-甲基异茨醇... 详细信息

目前,水处理机构普遍认为,天然有机物会妨碍活性炭的吸附位点与异味化合物结合,进而导致对甲萘烷醇和2-甲基异茨醇的清除效率下降。腐植酸也被认为具有相同的作用。对于城市水处理系统来说,饮用水中异味化合物如甲萘烷醇和2-甲基异茨醇的清除至关重要。已证实,环糊精聚氨酯可清除水中有机污染物,但不会显著降低天然有机物的含量。我们希望确定在有天然有机物存在的条件下,该聚合物是否能够有选择地去除甲萘烷醇和2-甲基异茨醇。本研究以腐植酸为天然有机物代表,因腐植酸约占天然有机物的70%。研究表明,不同浓度腐植酸的存在不会影响甲萘烷醇和2-甲基异茨醇的清除,使用环糊精聚合物,90%的异味化合物被去除。同时,紫外分析表明只有少量的腐植酸(3%～20%)被去除。

关键词：环糊精聚合物甲萘烷醇 2-甲基异茨醇腐植酸

Enhancing Blended Learning Materials using Cognitive Load Theory

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Journal of Modern Accounting and Auditing 2019年第1期15卷 40-53页

作者： Seedwell T. M. sithole University of Tasmania Hobart Australia

Online units of study are now an integral part of accounting education programs. Educators are increasingly becoming responsible for developing and teaching asynchronous online units, which can be challenging. This paper describes the transition of a blended working in professions unit by enhancing the blended materials using cognitive load theory (CLT) at an Australian university. Blended learning significantly reduces face-to-face instruction by integrating online learning experiences. To assess the perceptions of learners on enhanced blended learning materials, survey data were collected and student perception ratings were compared in blended learning environments incorporating CLT concepts and without CLT. Results show that student rated blended learning environments incorporating CLT highly, thus empirically validating the use of CLT in accounting education. The article concludes with suggestions of how accounting educators can incorporate CLT into online accounting instruction.

关键词： accounting accounting education asynchronous blended learning online