检索结果-内蒙古大学图书馆

Renewable pro-environmental and energy design of environmentally friendly behavior in Central Java

IOP Conference Series: Materials science and engineering 2021年第5期1098卷

作者： H Hamiyati N Nadiroh A Neolaka Family Welfare Education Study Program Faculty of Engineering Universitas Negeri Jakarta Jakarta Indonesia Civic education Study Program Faculty of Social Science Universitas Negeri Jakarta Jakarta Indonesia Civil Engineering Study Program Faculty of Engineering Universitas Negeri Jakarta Jakarta Indonesia

Energy in Indonesia is increasing rapidly every year in line with economic involvement, and human growth that is getting more and more energy is not fulfilled every year. Indonesia is among the most energy users because of its population; this is what drives the government to accelerate the use of renewable energy such as solar. This is related to its use, which can help many people who live in cities and remote areas such as; Electricity in households, public facilities, offices, electricity is said to be the most environmentally friendly. This research was conducted in Central Java by using descriptive qualitative methods and using research and development (R&D) methods. The technique used in this study is a qualitative expressive analysis technique. The resultant solution is to be able to meet the increasing electricity needs of the community, the use of renewable energy in the city that does not hurt the environment. This research produces renewable energy that can be used as a solution to solving the electrical energy crisis at an affordable cost and can increase the independence of the community so that it does not depend on government electricity supply and improve environmentally-friendly behavior.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Correlation between digital literacy and environmental literacy of 11th-grade students

引用

AIP Conference Proceedings 2024年第1期3106卷

作者： Mimien Henie Irawati Al Muhdhar Shinta Amrul Khoirina Muhamad Arjuna Salim Racy Rizky Abdillah Diana Hernawati Diki Muhamad Chaidir Muhammad Iqbal Akbar Lely Mardiyanti Mohammad Qodri Department of Biology Faculty of Mathematics and Sciences Universitas Negeri Malang Malang East Java Indonesia Department of Biologi Education Universitas Siliwangi Tasikmalaya Wesst Java Indonesia Department of Electrical and Informatics Engineering Faculty of Engineering Universitas Negeri Malang Malang East Java Indonesia Study Program of Biological Education Universitas Jambi Jambi Indonesia SMA Negeri 1 Batu Batu East Java Indonesia

The rapid development of technology, information, and communication requires students to master digital literacy. In addition, the rapid development of technology also affects environmental conditions, so it is necessary to master environmental literacy to understand and interpret environmental conditions, as well as build students’ awareness of environmental issues. This study aims to determine the correlation between digital literacy and student environmental literacy. The population in this research includes 11th-grade students of SMAN 1 Batu. The research sample amounted to 102 students, and the sampling technique used was purposive random sampling. Data were collected through digital literacy questionnaires, environmental literacy questionnaires, and environmental literacy tests. The data were tested for normality and homogeneity prerequisites and then analyzed using the Pearson Correlation statistical test. The results obtained show that the average digital literacy score of students is 105.1, including the high category, and the average student environmental literacy score is 279.7, included in the medium category. The high level of digital literacy will make students more critical in accessing technology and digital media. Digital literacy includes the process of finding, using multiple sources, evaluating, and using information to produce original products, with the maximum application of digital literacy, which is expected to support students’ environmental literacy in providing knowledge, understanding, and building an attitude of caring for the environment. The data obtained shows that there is a positive relationship between digital literacy and environmental literacy.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Development of solid waste of tofu industry immobilized on silica surface as adsorbent for the adsorption of Cd (II) using method of continuous flow column 1

Development of solid waste of tofu industry immobilized on s...

引用

1st International Conference on science and Technology for Environmental Protection, ICSTEP 2018

作者： Darmokoesoemo, H. Kuncoro, E.P. Supriyanto, G. Manuhara, W. Wijaya, A.L. Department of Chemistry Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia Study Program of Environmental Engineering Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia Department of Biology Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

The aim of this research is to determine the removal efficiency of Cd (II) based on the pH variation and the optimum pH on the batch method, the adsorbent height variation and flow rate in continuous flow column which using tofu solid waste industry which was immobilized silica as adsorbent, also to characterize and to identify functional groups of the absorbent using the FTIR analysis. The pH variation used was 2,3,4,5, and 6. Adsorbent height variation used was 2 cm and 4 cm. Then, variation of flow rate used was 5 ml/min and 10 ml/min. Determination of pH optimum was done using One-Way Anova analysis and continued with Duncan test and descriptive analysis based on the table and graphic. The analysis data of the removal efficiency of Cd (II) in continuous flow column was explained by the descriptive analysis. The pHPCZ was 8.4. The pH optimum was 6 with the removal efficiency 48.14%. The removal efficiency of Cd (II) in continuous flow column for the adsorbent height variation 2 cm and 4 cm which were 38,22% and 43,42% respectively. The removal efficiency of Cd (II) in continuous flow column for the flow rate 5ml/min and 10ml/min each by 38.22% and 39.01%. The result of FTIR analysis of the adsorbent conducted before the adsorption shown that there were functional groups of C=O (vibrate at 1651.07 cm-1), Si-O-Si (462.92 cm-1 and 1095.6 cm-1), O-H (3425.58 cm-1), and N-H (3749.62 cm-1). While, the result of the FTIR analysis after the adsorption shown that there were Si-O-Cd (956.72 cm-1) and Cd-N (412.78 cm-1). © 2019 IOP Publishing Ltd.

关键词： Adsorption

来源：评论

学校读者我要写书评

暂无评论

Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System

Stimulated Generation of Indistinguishable Single Photons fr...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Friedrich Sbresny Lukas Hanschke Eva Schöll William Rauhaus Bianca Scaparra Katarina Boos Eduardo Zubizarreta Casalengua Hubert Riedl Elena Del Valle Jonathan J. Finley Klaus D. Jöns Kai Müller Department of Electrical and Computer Engineering and MCQST Walter Schottky Institut Technische Universität München Garching Germany Center for Optoelectronics and Photonics Paderborn (CeOPP) and Department of Physics Institute for Photonic Quantum Systems (PhoQS) Paderborn University Paderborn Germany Faculty of Science and Engineering University of Wolverhampton Wolverhampton United Kingdom Departamento de Física Teórica de la Materia Condensada and IFIMAC Universidad Autónoma de Madrid Madrid Spain Department of Physics and MCQST Walter Schottky Institut Technische Universität München Garching Germany Institute for Advanced Study Technische Universität München Garching Germany

Single photons play a key role for applications in photonic quantum technologies. Here we propose, model and demonstrate a scheme that enables the generation of high purity indistinguishable single photons from a quan... 详细信息

ISBN: (纸本)9781957171258

关键词： Brightness Emission Optical properties Photon polarization Photons Quantum dots

来源：评论

学校读者我要写书评

暂无评论

Rabi antenna using microstrip add-drop multiplexer for electron warp speed investigation

引用

Chinese Optics Letters 2022年第7期20卷 80-87页

作者： Somchat Sonasang Prakasit Prabpal Piya Sirikan Pratimakorn Hakaew Nhat Truong Pham Preecha Yupapin Kanad Ray Sarawoot Boonkirdram Department of Electronic Technology Faculty of Industrial TechnologyNakhon Phanom UniversityNakhon Phanom 48000Thailand Department of Electrical Technology School of Industrial TechnologySakonnakhon Technical CollegeInstitute of Vocational Education Northeastern Region 2Sakonnakhorn 47000Thailand Division of Computational Mechatronics Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh City 72915Vietnam Faculty of Electrical and Electronics Engineering Ton Duc Thang UniversityHo Chi Minh City 72915Vietnam Amity School of Applied Sciences Amity University RajasthanJaipurIndia Faubert Lab Universitéde MontréalH3T 1P1 MontréalCanada Facultad de CienciasFisico-Matematicas Benemérita Universidad Autónoma de PueblaAv.San Claudio y Av.18 surCol.San Manuel Ciudad UniversitariaPuebla Pue 72570Mexico Program of Electrical and Electronics Faculty of Industrial TechnologySakon Nakhon Rajabhat UniversitySakon Nakhon 47000Thailand

This work presents experimental results of Rabi antenna characteristics using the coupled line microstrip *** was constructed by a modified coupled line microstrip four-port network,which is known as an add-drop *** driven AC input enters the device via an input port using the suitable frequency and coupled line microstrip ring *** multilevel system is generated by a wave-particle aspect before the two-level system is *** the resonance,the transitions of the states induce the energy called whispering gallery mode(WGM)at the circuit center,which is the squeezed *** generated electron oscillation within the WGM envelope oscillated by the frequency is known as the Rabi *** the successive filtering with continuous AC input via the selected port,the electron cloud warp speed can be generated and achieved inside the two-level *** constructed microstrip ring radius is 25 mm,and the experimental results of the Rabi antenna characteristics are in good agreement with the simulation *** obtained resonant antenna oscillation frequency is 2.103 *** electron cloud warp speed of 1.100c and time dilation of 0.006μs are obtained.

关键词： integrated photonics waveguide microwave photonics Rabi antenna

来源：评论

学校读者我要写书评

暂无评论

Muscle coactivation analysis for neuromuscular control assessment of lower limb stretch-shortening cycle

引用

Gait & Posture 2023年 106卷 S175-S176页

作者： Rodrigues, Carlos Correia, Miguel Abrantes, João Benedetti, Marco Nadal, Jurandir Faculty of Engineering- University of Porto Biomedical Engineering Program Porto Portugal INESC TEC - Institute for Systems and Computer Engineering- Technology and Science C-BER - Centre for Biomedical Engineering Research Porto Portugal Faculty of Engineering- University of Porto Department of Electrical and Computer Engineering Porto Portugal CICANT - Centre for Research in Applied Communication- Culture and New Technologies MovLab - Laboratory of Technologies for Interactions and Interfaces Lisbon Portugal Federal University of Pernambuco Department of Electronic and Systems Recife Brazil Federal University of Rio de Janeiro Biomedical Engineering Program Rio de Janeiro Brazil

IntroductionMuscle stretch-shortening cycle (SSC) is a central mechanism with lower limb muscle contraction immediately preceded by muscle stretch for efficient submaximal activities such as gait and powerful maximal activities such as running and jumping [1,2]. Research questionAlthough muscle SSC can be observed at gait and running its higher expression and accessibility is performed on standard maximum vertical jump (MVJ) with an open issue on neuromuscular control assessment of lower limb muscle SSC [3]. MethodsFor this purpose, we present and applied noninvasive subject specific analysis of lower limb muscle coactivation for selected muscles with higher contribution during MVJ impulse based on corresponding conditioned surface electromyographic signals (sEMG). Selected muscles correspond to lower limb muscles vastus medialis (VM), rectus femoris (RF), vastus lateralis (VL), lateral gastrocnemius (LG) and medial gastrocnemius (MG). Twenty-seven trials were assessed corresponding for each subject to the highest MVJ based on larger flight time with long SSC at countermovement jump (CMJ), short SSC at drop jump (DJ) and squat jump (SJ) with no SSC. Trial sample is composed by a group of six young adult volunteers’ students on sports and physical education degree with the ages (21.5 ± 1.4) years, (76.7 ± 9.3) kg mass and (1.79 ± 0.06) m height. Surface skin was prepared and Aqua-Wet gel Skintact F55 electrodes were applied at bipolar configuration as indicated by SENIAN. VM, RF, VL, LG and MG sEMG linear envelopes were paired plotted with the area under the curves computed as well as the coactivation pairs defined as the common area under the curves normalized to the sum of the corresponding pair individual areas under the curves. Coactivations were compared at CMJ, DJ and SJ as well as among CMJ, DJ and SJ, Fig. 1. ResultsStrongest coactivations with decreasing intensity were detected between VM-RF and LG-MG muscles at CMJ and SJ, whereas at DJ the strongest coacti

关键词：

来源：评论

学校读者我要写书评

暂无评论

Monitoring System for Organic Fertilizer Plant Controller Using Solar Energy

Monitoring System for Organic Fertilizer Plant Controller Us...

引用

International Conference on science and Innovated engineering 2018, i-COSINE 2018

作者： Mardiyanto, Arief Syamsul Azhar Electronics Study Program Faculty of Electrical Engineering Politeknik Negeri Lhokseumawe Jln. B.Aceh Medan Km.280 Buketrata24301 Indonesia

In this applied research, a solar energy powered process control monitoring system of inorganic fertilizer plant with capacity of 300 liters has been developed. The process control system consists of PLC with solar energy panel as its power source and a monitoring process system. The monitoring process system includes a Raspberry Pi minicomputer, an LCD touchscreen, level shifter converters, Arduino Nano, RS485 modules, four analog sensors, and one digital sensor. This system works by collecting temperature, humidity, and gas concentrations data and controlling the heater, exhaust fan, and aerator to maintain desired processing ***-22 digital sensor measures temperature and humidity, pH probe analog sensor measures pH values, MQ-4, MQ-7 and MiCS-2714 measures methane, carbon monoxide, and nitrogen dioxide gases respectively. Analog output sensor is read by PLC's analog to digital converter while digital output sensor is read by 1-wire bus by Arduino. The collected data is send over RS485 to Raspberry Pi. The plant temperature is set constant at 40°C. The heater is turned on at temperature of ≤ 38°C, when temperature reach ≤ 42°C the aerator, exhaust fan, and mixer will be on and will be switched off all together at 40°C. The temperature, humidity and PH are set as the reference of the control process. © Published under licence by IOP Publishing Ltd.

关键词： Solar energy

来源：评论

学校读者我要写书评

暂无评论

Linearity assessment between lower limb joint angles and angular accelerations at standard maximum vertical jumps with long-short and no countermovement

引用

Gait & Posture 2023年 106卷 S174-S175页

IntroductionStandard maximum vertical jump (MVJ) has been applied to assess lower limb long countermovement (CM) on countermovement jump (CMJ) and short CM on drop jump (DJ) for comparison to squat jump (SJ) without CM [1,2]. Research questionNevertheless, the ability for lower limb joint accelerations depending on lower limb joint angles at long, short and no CM remains an open issue [3,4], in particular linearity assessment of these relations at long, short and no CM in association with MVJ whole-body impulsion. MethodsFor this reason, we applied piecewise linear detection of segmented subphases on lower limb joint angles ( θ)-angular acceleration ( α) diagrams for the hip (H), knee (K) and ankle (A) during impulse phases on CMJ, DJ and SJ. Selected sample corresponds to best MVJ trials based on higher flight-time of 3 CMJ, DJ and SJ repetitions for six healthy untrained subjects with ages (21.5±1.4) years, (76.7±9.3)kg mass and (1.79±0.06)m height. Adhesive reflective markers were applied at lower limb and torso, with sagittal hip, knee, and ankle θ, α obtained by inverse kinematics. H,K,A ( θ, α) diagrams were plotted and impulsion subphases segmented at selected instants of ∂ a/∂ q phase reversal with linear fit by the least-squares method, Fig. 1. Fig. 1. Hip, knee, ankle joint ( θ, α) diagrams at CMJ, DJ, SJ with segmented subphases time span(Δt), |∂α/∂θ| slope magnitudes and R² linear fit regression. ResultsSJ presented larger number of ( θ, α) subphases than DJ, both larger than CMJ with higher |∂ α/∂ θ| variation at DJ and SJ than CMJ, pointing to higher complexity of neuromuscular control and contributing to explain reduced SJ, DJ performance without CM (0.33±0.05)m and with short CM (0.27±0.03)m in relation to CMJ with long CM (0.36±0.04)m for untrained selected subjects, Fig. 1. Thus, despite the larger total time span Δt at CMJ (0.76±0.10)s in relation to SJ (0.36±0.08)s and DJ (0.23±0.05)s, CMJ presented lower number of subphases with longer time span

关键词：

来源：评论

学校读者我要写书评

暂无评论

Exploring non-conventional techniques in biodiesel production: A brief review

引用

Molecular Catalysis 2025年 584卷

作者： Didik Krisdiyanto Karna Wijaya Akhmad Syoufian Aldino Javier Saviola Riska Astin Fitria Puji Wahyuningsih Bayu Wiyantoko Remi Ayu Pratika Won-Chun Oh J.V. Shanmukha Kumar Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Yogyakarta 55281 Indonesia Chemistry Study Program Faculty of Science and Technology UIN Sunan Kalijaga Yogyakarta 55281 Indonesia Department of Chemistry Faculty of Engineering Universitas Samudra Aceh 24354 Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Islam Indonesia Yogyakarta 55584 Indonesia Study Program of Chemistry Faculty of Mathematics and Natural Sciences Universitas Palangka Raya Palangka Raya 73111 Indonesia Department of Advanced Materials and Engineering Hanseo University Seosan-si Chungcheongnam-do 31962 Republic of Korea Department of Chemistry Koneru Lakshmaiah Education Foundation Vaddeswaram Guntur Andhra Pradesh 522502 India

Biodiesel represents a renewable and sustainable alternative to fossil fuels, offering notable environmental advantages such as reduced greenhouse gas emissions, lower toxicity, and biodegradability. However, its conventional production, primarily via the transesterification of vegetable oils or animal fats, faces considerable challenges, including high production costs, limited feedstock availability, energy intensive processes, and competition with food resources, all of which impede its large-scale implementation. This review critically evaluates the potential of emerging non-conventional feedstocks and production methods to address these limitations and enhance the overall feasibility of biodiesel. Alternative feedstocks such as waste cooking oil, lignocellulosic biomass, and microalgae are highlighted for their abundance, cost effectiveness, and minimal competition with food production, with microalgae particularly notable due to their rapid growth and high lipid content, making them a promising third generation source. Concurrently, advanced production technologies including enzymatic catalysis, supercritical fluids, microwave-assisted, ultrasound-assisted, and photothermal transesterification are examined for their capacity to increase reaction efficiency, reduce energy consumption, and process low quality feedstocks. Noteworthy advancements, such as microwave assisted systems that reduce reaction time by over 99 % and achieve biodiesel yields exceeding 96 % under ambient conditions, underscore the potential for industrial scale application. By comparing conventional and non-conventional approaches, this review underscores the pivotal role of innovation in overcoming technical and economic barriers, offering a comprehensive synthesis of recent developments to inform future research, industrial practices, and policy initiatives aimed at fostering a more sustainable biodiesel industry.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Coconut waste to green nanomaterial: Large scale synthesis of N-doped graphene nano sheets

引用

Nano-Structures and Nano-Objects 2023年 36卷

作者： Siburian, Rikson Tang, Liang Wei Alias, Yatimah Tok, Alfred Iing Yoong Goei, Ronn Simanjuntak, Crystina Tarigan, Kerista Paiman, Suriati Goh, Boon Tong Anshori, Isa Kurniawan, Cepi Postgraduate Program Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Carbon and Frankincense Research Center Universitas Sumatera Utara Medan 20155 Indonesia Department of Chemistry Faculty of Science Universiti Malaya Kuala Lumpur 50603 Malaysia University Malaya Centre for Ionic Liquids (UMCiL) Universiti Malaya Kuala Lumpur 50603 Malaysia School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Department of Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Physics Department Faculty of Science Universiti Putra Malaysia Selangor (Serdang) Seri Kembangan 43400 Malaysia Low Dimensional Materials Research Centre Department of Physics Faculty of Science University of Malaya Kuala Lumpur 50603 Malaysia Biomedical Engineering Department School of Electrical Engineering and Informatics Bandung Institute of Technology Bandung 40132 Indonesia Research Center of Nanoscience and Nanotechnology Bandung Institute of Technology Bandung 40132 Indonesia Chemistry Department Faculty of Mathematics and Natural Sciences Universitas Negeri Semarang Semarang 50229 Indonesia Functional Material Research Center Universitas Negeri Semarang Semarang 50229 Indonesia

In this paper, a breakthrough was achieved in large-scale production of N-doped Graphene Nano Sheets (N-GNS) using coconut fruits. The main objectives were to produce N-GNS on a large scale and assess its electrical conductivity. The process involved two key steps: first, producing GNS from coconut fruits through pyrolysis, and then generating N-GNS by doping with nitrogen using ammonia solution at room temperature. Various analytical techniques were used to characterize the produced N-GNS, including X-ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, and electrochemical cyclic voltammetry and electrochemical impedance spectroscopy. The XRD data indicated that the C (002) peak of N-GNS shifted to a higher 2θ value (2θ = 24.72°) compared to GNS (2θ = 23.86°), suggesting an incorporation of nitrogen into carbon structure in N-GNS. This was further supported by XPS data, which identified N-pyridine (BE = 402.0 eV) and C-N (BE = 286.8 eV) in N-GNS. TEM images showed that N-GNS had a flat surface, and the distance between graphene layers slightly expanded (0.36 nm) compared to graphene layers (0.34 nm). SEM images and EDX data validated the morphology, resembling honeycomb lattices, with a significant content of N atoms. Raman data successfully identified the D-band and G-band in N-GNS, further validating its production. Most importantly, N-GNS exhibited electrical conductivity, making it a promising candidate for conductive and supporting materials in various applications. The significance of this research extends beyond N-GNS production, opening up new avenues for the sustainable synthesis of valuable nanomaterials from coconut fruit waste, contributing to both graphene technology and environmental conservation. © 2023 Elsevier B.V.

关键词： C-sp2 electrical conductivity Graphene nano sheets N-graphene nano sheets N-pyridine XPS

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：