bluuebunny/crossref_metadata_2025 huggingface dataset:
Interaction of Heavy Metal Ions With Nanomaterials
Authors: Khan Suphiya , Kumari Sonu
Published: May 2021

Increasing water pollution due to heavy metals is a major global concern, and favorable remediation techniques are required. Heavy metal contamination affects both flora and fauna as it enters the food web. The development of nanotechnology and novel nanomaterials production has attracted researchers worldwide. Both carbon- and metal-based nanomaterials proved great adsorbents for heavy metal remediation because of their unique properties such as thermal and chemical stability and high surface. Novel green route for nanomaterials synthesis make the nanomaterials production an environmentally friendly, low cost, and user-friendly approach. This chapter reviews the heavy metal pollution causes and utilization of different nanomaterials for the remediation process.
Recent Developments of Epoxy Nanocomposites Used for Aerospace and Automotive Application
Authors: Kumar Sudheer , Krishnan Sukhila , Samal Sushanta Kumar
Published: May 2021

Epoxy resins are widely utilized engineering thermosetting polymers for industrial applications such as aerospace and automotive fields due to their higher mechanical, thermal, and chemical resistance. Recently, polymer nanocomposites have attracted huge attention both in academics and industry because they demonstrated the tremendous enhancement in material properties compared with a neat polymer or traditional micro and macro composites. Traditional composites generally require a high content (˃10%) of the inorganic fillers to bestow the desired mechanical properties. Higher filler content raises the density of the new product, thereby reducing the properties through fragile interfacial interaction among filler and the organic matrix. Furthermore, enhancing filler content makes processability very complicated. However, nanocomposites exhibit improved thermomechanical properties even with a small amount of nanoparticles (≤5%). The chapter provides information about the application of polymer nanocomposites (i.e., aerospace and automotive industries).
Nanocomposites in Drug Delivery and Imaging Applications
Authors: Chopra Dimple Sethi
Published: May 2021

Nanocomposites are a class of materials in which one or more phases with nanoscale dimensions are embedded in a metal, ceramic, or polymer matrix. The properties of nanocomposites depend on matrix, loading, degree of dispersion, size, shape, and orientation of the nanoscale phase and interaction between the matrix and the nanoscale phase. Nanocomposites are generally prepared using direct melt intercalation. The formation of nanocomposite is ascertained by XRD pattern, FTIR spectra, electron microscopy, and thermal analysis like DSC and TGA. Nanocomposites have properties of nanoparticles, multifunctional capabilities, chemical functionalization, huge interphase zone. Novel nanomaterials offer a new chemotherapeutic route for cancer treatment by combining cell imaging and hyperthermia in a synergistic way. In spite of toxicity and safety concerns, multifunctional nanocomposite still interest the researchers because of emergence of versatile properties, better understanding of disease biomarkers, and quest for ways to improve biocompatibility.
Preparation and Characterization of Biopolymeric Nanoparticles as Drug Delivery Vehicles
Authors: Sagiri Sai S. , Nayak Suraj K. , Lakshmi S. , Pal Kunal
Published: May 2021

In recent years, the use of biopolymeric nanoparticles as vehicles for drug delivery has increased exponentially. In the present study, chitosan and gelatin nanoparticles were prepared by ionic gelation and desolvation methods, respectively. Salicylic acid was used as the model drug. The nanoparticles were characterized using SEM, XRD analysis and FTIR spectrophotometric studies. In vitro drug release experiments were carried out to understand the mechanism of drug release. SEM micrographs showed the formation of spherical nanoparticles. XRD studies indicated a higher crystalline nature of the chitosan nanoparticles as compared to the gelatin nanoparticles. FTIR studies indicated the presence of salicylic acid within the drug- loaded nanoparticles. Drug release studies indicated that the developed nanoparticles may be used as carriers for various bioactive agents.
Newer Approaches in Phytoremediation
Authors: Chaudhary Khushboo , Khan Suphiya , Saraswat Pankaj Kumar
Published: May 2021

The heavy metal pollution problem is all over the world. Plant-growth-promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of plant-growth-promoting bacteria, chelating agents, and nanoparticles for remediation of heavy metals; their mechanism of action; and their applications approach of hyperaccumulation. Therefore, this chapter focuses on the mechanisms by which microorganisms, chelating agents, and nanoparticles can mobilize or immobilize metals in soils and the nano-phytoremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.
Nanomaterials in Medical Devices: Regulations' Review and Future Perspectives
Authors: Jagiello Karolina , Sosnowska Anita , Mikolajczyk Alicja , Puzyn Tomasz
Published: May 2021

This article gives a brief description of the existing regulations related to biomaterials safety that need to be considered before it is introduced into EU market. According to these regulations, the risk analysis should include two characteristics: probability of occurrence of harm, and severity. Identified user-related harm should be reduced by managing the risk. Additionally, the review presents an overview of engineered biomaterials (EBMs), which in combination with nanoscale components (NPs) have shown promises in Advanced Therapy Medicinal Products (ATMP) and Medical Devices (MD). In this article, recent challenges, objectives and perspectives in risk assessment and risk management of ATMP and MD composed of nanobiomaterials were also highlighted.
Influence of the Bolt Material Properties on the Ultimate Capacity of End Plate Bolted Joint Subjected to Column Loss
Authors: Tartaglia Roberto , Campiche Alessia
Published: May 2021

This paper investigates the performance of extended stiffened end-plate bolted beam-to-column joints subjected a column loss scenario by means of finite element simulations. An advanced numerical model was developed, and its effectiveness was validated against the experimental results. The influence of the bolt strengthening on the column loss action was investigated changing the grade of bolts. The results showed that the joint performance under column loss scenario are deeply related to the development of the catenary action that depends from the connection ductility; therefore increasing the bolt material strength will provide beneficial effects on the joint capacity under the column loss.
MALDI Mass Spectrometry Study of Glycated Substrates
Authors: Napoli Anna
Published: May 2021

In this report, we proposed a MALDI mass spectrometry-based approach to study the formation of glycated species by coupling carbonyl aldehydes of sugar and molecules nucleophilic groups via enzymatic oxidation. The proposed enzymatic glycation in vitro could be a simple method to obtain well-defined substrates useful to study biological properties and activities of proteins in clinical samples, during oxidative stress and disease.
Evaluation of Novel Strategies for Carbon Nanotube Functionalization by TGA/Chemometrics
Authors: Gullifa Giuseppina , Risoluti Roberta
Published: May 2021

Innovative preparation strategies for nanomaterial functionalization were proposed to provide novel tool to be used as drug delivery vectors for biomedical applications. In particular, three different carbon nanotubes were considered in this study such as the very small CNTs, the carboxylated CNTs (CNT-COOH) and the buckypapers and two polymers were used to study the functionalization. Different preparation procedures were investigated by thermogravimetric analysis (TGA), including the selection of the most performing polymer to be linked to the nanomaterial between PEI and PAMAM, the percentage of the polymer and the time of suspension. To simultaneously evaluate all these variables, an experimental design was planned and the recorded data were processed by chemometrics to identify the preparing procedure providing new nanomaterials able to conjugate microRNAs and to transfect efficiently endothelial cells.
Edible Film Coatings to Extend the Shelf-Life of Fresh-Cut Pineapple
Authors: Gullifa Giuseppina , Materazzi Stefano
Published: May 2021

This study proposes an innovative coating material and procedure to extend the shelf-life of fresh-cut pineapple classified as “minimally processed foods”. The novelty of this work consists of the using of biodegradable cases for the storage of fruits during the experiments under refrigerated conditions. In addition, the application of the coating process was evaluated over a period of 15 days and a complete characterization of the Volatile Organic Compounds (VOCs) was performed by gaschromatography coupled to mass spectrometry (GC-MS) to assess the effect of the coating material on the flavor, the appearance and the quality of the fruits. Results demonstrated that the application of carboxymethyl cellulose and ascorbic acid on pretreated fresh-cut pineapple is able to reduce the aging process and prolonge the shelf-life of pineapple without requiring conventional PVC cases for storage.
Adsorption of Mercury(II) Ion in Aqueous Solution by Using Bentonite-Based Monolith
Authors: Darmadi  , Mahidin  , Azzahra Siti Syifa , Masrura Munadiya
Published: May 2021

The removal of mercury from the waterbody remains a severe challenge in ensuring environmental safety due to its highly toxic and non-biodegradable properties. Adsorption is an evidently effective method for heavy metal removal in water. This research aims to study the mercury (II) ion adsorption behavior in aqueous solution onto extruded natural bentonite in monolithic structure, bentonite-based monolith (BBM) adsorbent. BBM was characterized by XRD, BET, and SEM, the results verify BBM could improve adsorption performance assumed on its structure. Adsorption efficiency, isotherm model, and adsorption kinetic were investigated. Experiments were performed in a lab-scale batch reactor with mercury solution concentration varied from 1 to 5 mg/L. The maximum adsorption efficiency discovered to be 63,9%. The experimental data fitted well to Langmuir isotherm (non-linear) and kinetic model pseudo first order (non-linear), revealing the maximum monolayer capacity (Qo) of BBM to be 0,187 mg/g with Langmuir constants KL and aL are 0,215 L/g dan 1,151 L/mg respectively. These value confirms that BBM adsorbent encompasses tremendous potential for mercury (II) ion removal in a solution.
Preparing Modified Activated Carbon from Cassia Fistula Seed with HNO3 for Zinc Removal in Wastewater
Authors: Trung Dao Minh , Luu Tran Le
Published: May 2021

The economic’s development also bring urbanization and industrialization in many countries. However, many pollutants are also discharged into the environment, especially heavy metals (Zinc) seriously affects people's life and health as well as the water environment. This study reports on the preparation of activated carbon materials modified with HNO3 from Cassia Fistula seed for heavy metal removal. The results showed that zinc removal efficiencies were 65.06%; 72.19%; 75.64%; 78.57% corresponds to concentrations of 50, 30, 20, 10 ppm at optimal survey conditions pH 5, dosage of 0.3 g/50ml and 60 minutes processing time. The research results show that the activated carbon modified with HNO3 from Cassia Fistula seed is a promising absorption material for heavy metal removal in wastewater.
Influence of Marine Propeller Geometry on Turbulence Model Selection for CFD Simulations
Authors: Shouman Mohamed R. , Helal Mohamed M.
Published: May 2021

Abstract One of the big challenges yet to be addressed in the numerical simulation of wetted flow over marine propellers is the influence of propellers' geometry on the selection of turbulence models. Since the Reynolds number is a function of the geometrical parameters of
the blades, the flow type is controlled by these parameters. The majority of previous studies employed turbulence models that are only appropriate for fully turbulent flows, and consequently, they mostly caused high discrepancy between numerical predictions and corresponding experimental measurements
specifically at geometrical parameters generating laminar and transient flows. The present article proposes a complete procedure of computational fluid dynamics simulation for wetted flows over marine propellers using ANSYS FLUENT 16 and employing both transition-sensitive and fully turbulent
models for comparison. The K-Kl-ω transition model and the fully turbulent standard K-ε model are suggested for this purpose. The investigation is carried out for two different propellers in geometrical features: the INSEAN E779a model and the Potsdam Propeller
Test Case (PPTC) model. The results demonstrate the effectiveness of the K-Kl-ω transition model for the INSEAN E779a propeller rather than the PPTC propeller. This can be interpreted as the narrow-bladed and small-diameter propellers have more likely laminar and transient
flows over its blades.
Cybersecurity Resiliency of Marine Renewable Energy Systems Part 2: Cybersecurity Best Practices and Risk Management
Authors: de Peralta Fleurdeliza A. , Watson Mark D. , Bays Ryan M. , Boles Joshua R. , Powers Ford E.
Published: May 2021

Abstract Marine renewable energy (MRE) is an emerging source of power for marine applications, marine devices, and coastal communities. This energy source relies on industrial control systems and IT to support operations and maintenance activities, which create a pathway
for an adversary to gain unauthorized access to systems and data and disrupt operations. Incorporating cybersecurity risk prevention measures and mitigation capabilities from inception, development, operation, to decommissioning of the MRE system and components is paramount to the protection
of energy generation and the security of network architecture and infrastructure. To improve the resilience of MRE systems as a predictable, affordable, and reliable source of energy, cybersecurity guidance was developed to enable operators to assess cybersecurity risks and implement security
measures commensurate with the risk. This publication is the second of a two-part series, with Part 1 addressing a framework to determine cybersecurity risk by assessing the vulnerability of an MRE system to potential cyber threats and the consequences a cyberattack would have on the end user.
This Part 2 publication describes an approach to select appropriate cybersecurity best practices commensurate with the MRE system's cybersecurity risk. The guidance includes 86 cybersecurity best practices, which are associated with 36 cybersecurity domains and grouped into nine categories.
The best practices follow the core functions of the National Institute of Science and Technology Cybersecurity Framework (e.g., identify, detect, protect, respond, and and recover) and insights from both maritime and energy industry guidance documents to identify security measures effective
in protecting information and operational technology assets prevalent in MRE systems.
Do contrasting patterns of migration movements and disease outbreaks between congeneric waterfowl species reflect differing immunity?
Authors: Yin Shenglai , Xu Yanjie , Batbayar Nyambyar , Takekawa John Y. , Si Yali , Prosser Diann J. , Newman Scott H. , Prins Herbert H.T. , De Boer Willem F.
Published: May 2021

Long-distance migrations influence the dynamics of hostpathogen interactions and understanding the role of migratory waterfowl in the spread of the highly pathogenic avian influenza viruses (HPAIV) is important. While wild geese have been associated with outbreak events, disease ecology of closely related species has not been studied to the same extent. The swan goose (Anser cygnoides) and the bar-headed goose (Anser indicus) are congeneric species with distinctly different HPAIV infection records; the former with few and the latter with numerous records. We compared movements of these species, as well as the more distantly related whooper swan (Cygnus cygnus) through their annual migratory cycle to better understand exposure to HPAIV events and how this compares within and between congeneric and noncongeneric species. In spite of their record of fewer infections, swan geese were more likely to come in contact with disease outbreaks than bar-headed geese. We propose two possible explanations: i) frequent prolonged contact with domestic ducks increases innate immunity in swan geese, and/or ii) the stress of high-elevation migration reduces immunity of bar-headed geese. Continued efforts to improve our understanding of species-level pathogen response is critical to assessing disease transmission risk.
Water and health in mining settings in sub-Saharan Africa: A mixed methods geospatial visualization
Authors: Leuenberger Andrea , Dietler Dominik , Lyatuu Isaac , Farnham Andrea , Kihwele Fadhila , Brugger Fritz , Winkler Mirko S.
Published: May 2021

Industrial mining transforms local landscapes, including important health determinants like clean water and sanitation. In this paper, we combined macro-level quantitative and micro-level qualitative data to show how mining projects affect water infrastructures and ultimately the health of affected communities. Although we observed a positive trend of water infrastructure in mining settings, surrounding communities are also characterized by water scarcity and degradation of water quality. The video at the core of this publication showcases inter-linkages of the findings obtained at both the macro- and the micro-levels, embedding our results in a geospatial context. While mining projects can have positive impacts on the development of local water infrastructure, improved management of negative impacts of mining projects is needed for promoting ‘Good health and well-being’ and ‘Clean water and sanitation’ as promulgated by the Sustainable Development Goals of the 2030 Agenda.
Identification of clays and Fe oxide minerals rich alteration zones using a Landsat 8 image of Pu Sam Cap area, Lai Chau
Authors: Tran Hieu Trung , Tran Cuong Quoc , Tran Dung My , Bui Chung Minh , Chu Dung Van , Nguyen Thanh Trung , Nguyen Quan Cong , Nguyen Anh Duc , Bui Thao Phuong ,   Center for Remote sensing and Geomatic, Institute of Geological Science, VAST, Vietnam  Department of Geology, General Department of Geology and Minerals of Vietnam, Vietnam  I Corps, Intergeo Geological Division, Vietnam
Published: May 2021

The hydrothermal alteration zones are the important sign for mineral exploration and can be identified by remote sensing images completely, but this is limited due to the effect of vegetable. We address this problem by a method called “Directed Principal Component Analysis” (DPCA) that involves calculating principal components on two input band ratio images. One ratio is a geological discriminant, confused by the presence of vegetation; the second ratio is chosen for its suitability as a vegetation index. DPCA applied on Landsat 8 image in Pu Sam Cap area, Lai Châu characteristied by argilic alteration, sericite alteration, etc., with the typical minerals like kaolinite, illite, etc., and pyrite, chalcopyrite, magnetite; specularite, etc., The results have identified Fe - rich zones in Bai Bang and Nam Tra areas; clay minerals are concentrated mainly in Nam Tra area and along the main faults. The results are also compared with previous research data and fieldtrip data that shows similarity and feasibility. This paper indicated limitation of Landsat image such as spatial resolution, spectral resolution, etc., when applied in the tropical area.
Research on pipeline and flow assurance solutions of oil and gas transportation from Diamond WHP to FPSO Ruby II
Authors: Nguyen Thinh Van , Nguyen Chinh Duc , Trieu Truong Hung ,   Faculty of Oil and Gas, Hanoi University of Mining and Geology, Vietnam  Petro Vietnam Exploration Production Corporation, Vietnam
Published: May 2021

In offshore production of oil and gas, transporting products by subsea pipeline always has potential risks affecting the efficiency of the transportation process. For the Diamond oilfield, the process of gathering products and transportation is carried out according to a closed scheme in which the exploited products are preliminarily treated. The separated oil is transported to FPSO Ruby - II while the separated gas passed through the air compressor to increase pressure and then used for gaslift production. In fact, the oil produced at the Diamond oilfield has a high paraffin content, which causes difficulties during transportation. Therefore, the study on flow assurance to ensure the transportation of oil and gas from the Diamond oilfield to the FPSO Ruby - II is imperative. This paper presents the results of the research on flow assurance to maintain the safety of the transportation basing on the analysis of field data and the capability of the current subsea pipeline in comparison with the data gained from models carried out with OLGA software. The results show that the rate of wax deposition at normal steady state condition is relatively low. In addition, the thickness of wax deposition build - up is relatively small by simulation results. However, due to low temperature of transported oil which is lower than pour point temperature, a freeze layer will form on the surface of the pipeline. Therefore, regular pigging is considered the most effective way to remove wax.
Research on identifying types of environmental conflicts in mineral activities in Lao Cai province and propose solutions to sustainable development
Authors: Nguyen Phuong , Nguyen Dong Phuong , Nguyen Cuc Thi ,   Faculty of Civil Engineering, Hanoi University of Mining and Geology, Vietnam
Published: May 2021

The article shows some results about establishes types of environmental conflicts in mineral activities base on applying a combination of analytical methods, document synthesis, investigation methods, statistics, community interviews and expert opinion. In Lao Cai province, there are many mineral resources such as copper, iron, apatite, kaolines - felsspat, limestone, clay, sand, gravel, etc., being exploited. Mining projects often use large amount of land areas. The process of mining and processing are polluting more and more seriously day by day. This is the main cause leading to environmental conflicts in study areas. The research results have evaluated and identified the types of environmental conflicts relating to mineral exploitation activities in Lao Cai province. They consist of conflict between mineral exploitation and natural environment (water, air); conflict between mineral exploitation and other natural resources (land, forest, etc.); conflict among social interest groups. Besides, we have proposed general and specific solutions to prevent and minimize the harmful effects of environmental conflics for sustainable development suitable to the socio - economic conditions of Lao Cai province.
Playing in Childhood Education: Playground Contexts and the Behavior of a Child with Intellectual Disability
Authors: Amorim Thalita Cristina Prudencio de , Gimenez Roberto
Published: May 2021

Some research focused on physical and sensory accessibility in playgrounds bring some evidence that this is a place that should be thought of for all children, in public spaces and schools. However, little is yet discussed about accessibility or strategies for structuring spaces that support the development of children with intellectual disabilities. Among the existing studies there are relatively few studies that seek to observe children in natural conditions, paying attention to the child's spontaneity and without guidance from the researcher. This study aimed to explore the possible impacts of playground use on the behavior of a child with intellectual disabilities. The methodology used corresponded to ethology. For purposes of analysis, establishments, categories, toys and equipment, social interactions and motor skills were used. In general, data analysis suggested a tendency for the child to play alone instead of exploring playground equipment, as well as to perform few manipulative skills, privileging locomotion. These results suggest the need to rethink proposals aimed at early childhood education based on inclusive contexts. It is essential that teachers participate in the planning and structuring of spaces for early childhood education, especially in an inclusive perspective.
AN ANALYSIS OF TEACHERS’ PERSPECTIVE ON STUDENTS’ SPEAKING SKILL PROBLEMS AT TENTH GRADE STUDENTS OF SMK DWIJENDRA DENPASAR IN THE ACADEMIC YEAR 2019/2020
Authors: Ebidona Yuliana , Yuniari Ni Made
Published: May 2021

Abstract

This research aimed to know the students' problems in speaking skills at the tenth-grade students of SMK Dwijendra Denpasar Based on Teachers’ perspective, this research was a qualitative case study. The subjects of this research were two English Language teachers of SMK Dwijendra Denpasar. They were data collected through some instrument namely observation, an interview guide, recording, analysis documents, and interviewing. The findings showed that they were three difficulties faced by students when learning English was the level of mastery of vocabulary students have very less and Grammatical Errors in speaking, students experience difficulties and errors, especially in arranging sentences correctly. The strategies used by teachers to overcome students' problems in their ability to speak English were through strategies 1) small group discussions 2) Reading, 3) Practicing Dialogue and Retelling, 4) Translation According to the subject, 5) staring at the dictionary, 6) taking notes, 7) Provides opportunities for students to use vocabulary in real life contexts. The efforts made by teachers to make teaching and learning activities in English classes more interesting were1) by collaborating learning with games related to teaching materials. 2) play a word game. 3) provides opportunities for students to use vocabulary in real life contexts.

Keywords: Teacher's perspective, speaking skills, Students’ problems

 

Abstrak

Penelitian ini bertujuan untuk mengetahui permasalahan siswa dalam keterampilan berbicara pada siswa kelas X SMK Dwijendra Denpasar bersadarkan perspektif Guru. Penelitian ini merupakan studi kasus kualitatif. Subjek penelitian ini adalah dua orang guru Bahasa Inggris SMK Dwijendra Denpasar. Pengumpulan data dilakukan melalui beberapa instrumen yaitu observasi, pedoman wawancara, pencatatan, analisis dokumen, dan wawancara. Hasil penelitian menunjukkan bahwa ada tiga kesulitan yang dihadapi siswa ketika belajar bahasa Inggris dimana tingkat penguasaan kosakata siswa sangat kurang dan Grammatical Errors dalam berbicara, siswa mengalami kesulitan dan kesalahan terutama dalam menyusun kalimat dengan benar. Strategi yang digunakan guru untuk mengatasi masalah siswa dalam kemampuan berbahasa Inggris adalah melalui strategi 1) Diskusi Kelompok Kecil 2) Membaca, 3) Berlatih Dialog dan Menceritakan Kembali, 4) Penerjemahan Sesuai Mata Pelajaran, 5) Menatap Kamus, 6) mencatat, 7) Memberikan kesempatan kepada siswa untuk menggunakan kosakata dalam konteks kehidupan nyata. Upaya yang dilakukan oleh guru untuk membuat kegiatan belajar mengajar di kelas bahasa Inggris lebih menarik adalah 1) dengan mengkolaborasikan pembelajaran dengan permainan yang berkaitan dengan bahan ajar. 2) Mainkan permainan kata. 3) memberikan kesempatan kepada siswa untuk menggunakan kosakata dalam konteks kehidupan nyata.

Kata kunci Perspektif Guru, Keterampilan Berbicara, Masalah Siswa
THE USE OF POSSE (PREDICT, ORGANIZE, SEARCH, SUMMARIZE, AND EVALUATE) STRATEGY TO IMPROVE STUDENTS’ READING COMPREHENSION IN NARRATIVE TEXT AT THE TENTH GRADE OF SMK PGRI 2 DENPASAR IN THE ACADEMIC YEAR 2019/2020
Authors: Vety Isma Ulfa  , Indah Triana Juliari I Gusti Ayu
Published: May 2021

Abstract

This research aims to improve the tenth grade students’ reading comprehension by using POSSE strategy in SMK PGRI 2 Denpasar. It was an action research study which consisted of two cycles.The subjects of the research were students of X grade AK2 of SMK PGRI 2 Denpasar in the academic year 2019/2020. The qualitative data were collected by anlyzing the results of observation and interviewed the students on the learning process. The procedure of the research consisted of some stages, namely: planning, action, observation, and reflection. The instruments used of this research were observation sheet, interview guide, and tests. The method of collecting data were used interview, documentation, observation and test.

The results of this research showed that the use of POSSE strategy was succesfully improve the students’ reading comprehension. Based on the quantitative data, the students’ mean scores for the reading comprehension improved from 55 in pre-test to 69 in post test 1 and 79 in post test 2. Meanwhile, from interviewed the students about the use of POSSE strategy showed that it helped the students to understand narrative text and helped them enrich their vocabulary knowledge. Besides that, the use of POSSE strategy could attract their attention in teaching and learning process.

Keywords: Reading Comprehension, Narrative Text, POSSE strategy.

 

Abstrak

Tujuan dari penelitian ini adalah untuk meningkatkan pemahaman membaca siswa kelas sepuluh dengan menggunakan strategi POSSE di SMK PGRI 2 Denpasar. Penelitian ini adalah penelitian tindakan kelas yang terdiri dari 2 skilus. Subjek penelitian ini adalah terdiri dari 35 siswa kelas X AK2 di SMK PGRI 2 Denpasar tahun ajaran 2019/2020. Data kualitatif dikumpulkan melalui menganalisis hasil observasi dan interview siswa terhadap proses pembelajaran. Prosedur penelitian terdiri dari beberapa tahapan yaitu perencanaan, tindakan, observasi dan refleksi. Instrument dari penelitian ini menggunakan lembar observasi, pedoman wawancara, dan tes. Pengumpulan data menggunakan metode wawancara, dokumentasi, observasi, dan tes evaluasi.

Hasil penelitian ini menunjukkan bahwa penggunaan strategi POSSE berhasil untuk meningkatkan pemahaman membaca siswa. Berdasarkan data kuantitatif, nilai rata-rata siswa untuk pemahaman membaca meningkat dari 55 di pre-test, menja1di 69 di post-test 1, dan 79 di post-test 2. Sementara itu, hasil wawancara para siswa tentang penggunaan strategi POSSE menunjukkan  bahwa dapat membantu siswa untuk memahami teks naratif dan membantu mereka memperbanyak pengetahuan kosa kata. Selain itu, penggunaan strategi POSSE dapat menarik perhatian mereka dalam proses belajar mengajar.

Kata Kunci: Pemahaman membaca, teks naratif, strategi POSSE.
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE TEAM GAMES TOURNAMENT (TGT) BERBANTUAN MEDIA VISUAL UNTUK MENINGKATKAN AKTIVITAS DAN HASIL BELAJAR SISWA KELAS IIIC SD TUNAS HARAPAN JAYA DENPASAR
Authors: A.A. Oka Suciati
Published: May 2021

ABSTRAK

Penelitian ini bertujuan untuk meningkatkan aktivitas dan hasil belajar siswa kelas IIIC SD Tunas Harapan Jaya Denpasar melalui penerapan model pembelajaran kooperatif tipe teams games tournament (TGT) berbantuan media visual. Penelitian ini merupakan Penelitian Tindakan Kelas yang diadopsi  dari Arikunto 2014 dan dilaksanakan secara kolaboratif antara guru dengan peneliti. Subjek  penelitian ini adalah siswa kelas IIIC SD Tunas Harapan Jaya Denpasar dengan jumlah siswa 34 orang siswa yang terdiri dari 15 siswa laki-laki dan 19 siswa perempuan. Data mengenai aktivitas belajar siswa diperoleh dengan menggunakan metode observasi dengan instrument yang berbentuk lembar observasi, sedangkan data mengenai hasil belajar siswa diperoleh dengan metode tes dengan instrumennya berupa tes hasil belajar. Data yang telah dikumpulkan, dianalisis menggunakan dekriptif kuantitatif. Hasil penelitian menunjukkan (1) terjadi peningkatan persentase rata-rata aktivitas belajar sebesar 15,47% dari 67,34% pada siklus I dengan kriteria cukup aktif menjadi 82,81% dengan kriteria aktif pada siklus II, dan (2) terjadi peningkatan persentase rata-rata hasil belajar siswa sebesar 6,77% dari 74,41% pada siklus I dengan kriteria sedang menjadi 81,18% pada siklus II dengan kriteria tinggi. Berdasarkan hasil analisis yang telah dilaksanakan disimpulkan bahwa penerapan model pembelajaran kooperatif tipe teams games tournament (TGT) berbantuan media visual dapat meningkatkan aktivitas dan hasil belajar siswa kelas IIIC SD Tunas Harapan Jaya Denpasar.

 

 

Kata Kunci: Teams Games Tournament (TGT), Media Visual, Aktivitas, Hasil Belajar Siswa
Pengaruh Idola Musik K-Pop (Korean - Pop) Terhadap Perubahan Karakter Remaja di SMAN 5 Karawang
Authors: Melian Widdy Assa , Tridays Repelita  , Lusiana Rahmatiani
Published: May 2021

ABSTRAK

Penelitian ini dilatar belakangi oleh keinginan penulis unuk mengetahui perubahan karakter yang dialami remaja yang menggemari idola musik K-Pop (Korean Pop), Penelitian ini termasuk kedalam jenis penelitian kuantitatif, peneltian kuantitafif yang diistilahkan dengan penelitian ilmiah yang menekan kepada angka – angka. Tahapan dalam penelitian ini yaitu uji instrumen, pengumpulan data, menganalisa data, serta menginterpretasikan data. Populasi dalam penelitian ini adalah seluruh siswa SMAN 5 Karawang yang berjumlah 1. 263. Siswa sample dalam penelitan  ini sebanyak kelas, dalam pengambilan sampel peneliti menggunakan teknik Simple Random Sampling yaitu pengambilan sample secara acak tanpa memperhatikan strata yang ada dalam popluasi. Dari hasil penelitian diperoleh hasil (thitung 3,021 > ttabel 1,275 ) hasil tersebut menunjukkan bahwa hipotesis pengaruh Idola K-Pop terhdap perubahan karakter remaja (H1) dapat diterima. Rekomendasi dari penelitian ini, Pertama, pihak sekolah disarankan lebih mendalami mata pelajaran Pendidikan Pancasila dan Kewarganegaran untuk menumbuhkan rasa nasionalisme kepada siswa ditenga gempuran budaya asing yang semakin menyebar di Indonesia,. Kedua, disarankan kepada remaja untuk lebih bisa mengontrol diri dan memahami tidak semua budaya asing dapat diimplementasikan kedalam kehidupan sehari – hari.

Kata Kunci : Idola K-Pop,  Remaja, Karakter,
ANALISIS KLAUSA PADA ARTIKEL OPINI “SETELAH BENCANA, LALU APA?” OLEH IQBAL AJIDARYONO YANG DIMUAT DETIK.COM 29 SEPTEMBER 2020
Authors: Firdiani Putri Dziza , Purwo Yudi Utomo Asep
Published: May 2021

Penelitian difokuskan pada bidang Sintaksis yaitu klausa. Analisis klausa pada artikel opini “Setelah Bencana, Lalu Apa?” oleh Iqbal Aji Daryono yang dimuat detik.com 29 September 2020 ini dilatarbelakangi adanya keberagaman dalam penggunaan klausa pada artikel online khususnya pada artikel opini. Penelitian ini bertujuan untuk mengklasifikasikan klausa pada artikel opini tersebut berdasarkan tiga hal, yaitu berdasarkan fungsi yang menjadi unsur-unsurnya (fungsi sintaksisnya), berdasarkan kategori yang menjadi unsur-unsurnya (kategori sintaksisnya), dan berdasarkan peran yang menjadi unsur-unsurnya (peran sintaksis). Metode yang digunakan untuk menganalisis klausa pada artikel opini ini adalah metode penelitian kualitatif. Sumber data dari penelitian ini adalah artikel berupa opini dalam laman berita online detik.com. Hasil dari penelitian ini menganalisis klausa berdasarkan fungsi, kategori, dan peran. Sedangkan klausa sendiri dapat dibedakan antara lain klausa berdasarkan distribusinya yaitu klausa terikat dan kalusa bebas, klausa berdasarkan ada atau tidaknya unsur negasi yaitu klausa positif dan juga klausa negatif, serta klausa berdasarkan kategori pengisi fungsi predikatnya. Dengan adanya analisis ini diharapkan para pembaca lebih memahami mengenai klausa dan analisisnya.
TINJAUAN HISTORIS PERJALANAN PANCASILA (SEJAK PENETAPANNYA SEBAGAI DASAR NEGARA HINGGA REFORMASI)
Authors: PELLOKILA JEREMIAS
Published: May 2021

Abstrak

Penelitian ini bertujuan untuk mengetahui sejarah perjalanan Pancasila mulai dari penetapannya sebagai dasar negara hingga reformasi. Metode yang diaplikasikan dalam penelitian ini deskriptif kualititatif. Metode pengumpulan data yang dimanfaatkan dalam penelitian adalah studi dokumentasi dan literatur. Adapun hasil penelitian ini menunjukan, bahwa Pancasila pada masa revolusi kemerdekaan belum berjalan sebagaimana mestinya. Pancasila dalam Konstitusi RIS berbeda sekali dengan nilai-nilai Pancasila yang terkandung pada UUD 1945. Pancasila pada masa Orde Lama sama sekali tidak dilaksanakan, melainkan justru diselewengkan melalui tindakannya. Pancasila di era Orde Baru dimanipulasi dengan berbagai tafsir yang tujuannya untuk menutupi segala kebijakannya yang menyimpang. Pancasila di era reformasi semakin tenggelam oleh hiruk pikuk perkembangan kehidupan politik dan demokrasi di Indonesia yang ditandai dengan kebebasan.

     

Kata Kunci: Perjalanan Pancasila, Dasar Negara, dan Reformasi
PENINGKATAN HASIL BELAJAR PPKn MELALUI METODE DEBAT PRO DAN KONTRA PADA SISWA KELAS VIIIB SMPN 3 MENGWI KABUPATEN BADUNG TAHUN PELAJARAN 2020/2021
Authors: Sujana I Gede
Published: May 2021

ABSTRAK

 

Penelitian ini bertujuan untuk mengetahui peningkatan hasil belajar pada mata pelajaran PPKn melalui penerapan metode Debat pro dan kontra pada siswa kelas VIIIB SMPN 3 Mengwi Kabupaten Badung Tahun Pelajaran 2020/2021. Jenis penelitian ini menggunakan jenis penelitian tindakan kelas yang bersifat daur siklus berulang. Masing-masing siklus dilaksanakan melalui 4 tahapan yaitu perencanaan, pelaksanaan, pengamatan, dan refleksi. Pengumpulan data dilakukan melalui observasi dan tes, dengan menggunakan lembar observasi serta soal-soal tes yang dianalisis menggunakan teknik kualitatif dan kuantitatif. Subjek pada penelitian ini adalah siswa kelas VIIIB yang berjumlah 32 orang. Teknik pengumpulan data yang digunakan untuk mengukur hasil belajar siswa menggunakan data kuantitatif yaitu tes tertulis dan untuk mengukur aktivitas guru dikelas digunakan data kualitatif yaitu lembar observasi. Hasil penelitian ini menunjukkan bahwa pembelajaran metode Debat pro dan kontra  memiliki dampak positif dalam meningkatkan hasil belajar siswa. Hal ini dapat dilihat dari semakin meningkatnya presentase ketuntasan belajar siswa dari siklus I dan II. Pada siklus I presentase tingkat hasil belajar mencapai 70% dan ketuntasan klasikal mencapai 90%. Setelah dilaksanakan perbaikan pada tindakan siklus II presentase tingkat hasil belajar siswa mampu mencapai  85 % dan ketuntasan klasikal mencapai 100%. Nilai kriteria ketuntasan minimal (KKM)  dari penelitian ini adalah 75.

 

Kata Kunci: Metode Pembelajaran Debat Pro dan Kontra, Hasil Belajar, PPKn.
FUNGSI DAN MAKNA SIMBOL-SIMBOL DALAM PALINGGIH PADMASANA PERSPEKTIF KAJIAN BUDAYA
Authors: Putera Semadi Anak Agung Gde
Published: May 2021

Abstract

 

Palinggih Padmasana is a sanctified building to worship Ida Sang Hyang Widhi Wasa/God Almighty in His various manifestations. It does not only has a varying fomrs, but olso defferent designation , function, and meaning of symbols which differ based on its location. Historycally, the existence of this palinggih was only known around 15th century especially during the reigin of Dalem Waturenggong which was indicated by the arrival of a powerful Shiwa priest to Bali named Danghyang Dwijendra with a sacred mission of perfecting the order of Hindu life from Tri Murti to Tri Purusa concept. Each function and symbol in palinggih Padmasana truly reflects the nobility of invaluable meaning, therefore, Padmasana is a symbol of the universe for Hindus. Through the perspective of cultural sytudies which is accompained by the implementation of descriptive analysis method, this research topic was successfully studied critically, logically, and systematically.
BALANCING GENDER ACHIEVEMENT AND KNOWLEDGE RETENTION IN MATHEMATICS USING COMPUTER ANIMATION INSTRUCTIONAL PACKAGE (CAIP)
Authors: Nwoke lhechukwu , Chidi Okorie , Chile-Agada B.U.N
Published: May 2021

The study was carried out to investigate the effectiveness of Computer Animation Instructional Package on balancing gender achievement and knowledge retention in mathematics in secondary schools. The study was a quasi-experimental type adopting the pre-test, posttest non-equivalent control design type. The population of the study comprised of all senior secondary 1(SS1) students of Government owned secondary schools in Owerri North Local Government Area of Imo State. The sample for the study was 225 students from two purposively selected secondary schools consisting of 127 females and 98 males. The instrument for data collection was a researcher made 30-item objective test questions titled “Mathematics achievement Test (MAT)”. It had reliability coefficient of 0.91 determined using Kuder-Richardson (KR21.). The experiment group was taught Surface area and volume of solids using Computer Animation Instructional Package (CAIP) while, the control group was taught the same concept using traditional approach. The data generated was analyzed using mean and standard deviation to answer research questions while the hypotheses were tested at 0.05 level of significance using Analysis of Covariance (ANCOVA). The result of the study revealed that Computer Animation Instructional Package (CAIP) reduced gender disparity associated with mathematics achievement as there was no significant difference between the mean achievement scores of male and female students taught mathematics using Computer Animation Instructional Package (CAIP). Also there was no significant difference between the posttest and delayed posttest mean achievement scores of students taught mathematics using Computer Animation Instructional Package(CAIP). Based on the result it was recommended that, Mathematics teachers should use Computer Animation Instructional Package (CAIP) to teach mathematics as to reduce gender disparity in mathematics achievement and enhance knowledge retention in secondary schools.
Réflexions sur le discours haineux : la loi face à la praxis langagière
Authors: TIO BABENA GILBERT WILLY
Published: May 2021

Les menaces à la paix et à la stabilité sont des présupposés consubstantiels de la notion de vivre ensemble. Le législatif, dans l’optique d’y faire face et d’assurer l’harmonie sociale, propose un ensemble d’instruments juridiques qui se résument pour l’essentiel à pénaliser le discours haineux dans le but d’éviter l’embrasement. La logique pénale approche le problème sous l’angle de la sanction, mais s’appuie pourtant sur l’objet langagier dont la plasticité autorise des tours et détours en rendant difficile l’établissement des atteintes au vivre ensemble. L’article entend questionner les contours du discours haineux dans l’optique de mettre en évidence les défis de la praxis langagière posés aux textes de droit. Il s’appuie sur des exemples puisés dans la sphère médiatique. Dans les pays constitués de plusieurs ethnies, les rivalités sociopolitiques renforcent la haine et accentuent du même coup la difficulté d’apprécier le discours outrageux prononcé sous cape d’une liberté d’expression. Au demeurant, la complexité des jeux de langage et des situations énonciatives devrait forcer le judiciaire à recourir à des expertises linguistiques, parmi tant d’autres, pour examiner les discours incriminés.
Pratique du bilinguisme et enseignement dans les universités au Tchad
Authors: MAHAMAT ALHADJI
Published: May 2021

Aujourd’hui, au Tchad, la pratique des langues dans l’éducation diffère beaucoup de celle mise en place il y a quelques décennies. Les langues d’enseignement/apprentissage aux prises avec les langues nationales, les langues vernaculaires et les langues étrangères s’imposent difficilement comme langue des sciences. Ce qui met au-devant des pratiques des enseignants, l’épineuse équation de l’émergence du bilinguisme à différents paliers éducatifs. Il est question dans cet article d’étudier à travers la problématique des contextes multilingues et multiculturels, ainsi que du choix des langues d’enseignement, l’influence de la pratique du bilinguisme sur les enseignants-chercheurs et les enseignantes-chercheuses dans les universités au Tchad. Dans ce cadre, nous avons effectué une recherche de type documentaire conduite en 2 étapes. L’analyse a passé en revue un certain nombre de facteurs essentiels en rapport avec le bilinguisme et inhérents aux pratiques enseignantes en milieu universitaire, notamment les enjeux de la pratique du bilinguisme, la maîtrise des langues d’enseignement, les pratiques pédagogiques des enseignants-chercheurs et des enseignantes-chercheuses, la formation initiale des enseignant·e·s des universités au Tchad. Il ressort de l’analyse que la pratique du bilinguisme est une réalité complexe qui influe sur l’enseignement en milieu universitaire. Ce qui dénote l’existence des poches de résistance qui définissent le revers de la pratique du bilinguisme en voilant encore son effectivité. Ce faisant, il est indiqué de redéfinir un cadre normatif qui tient compte davantage de la place du bilinguisme intégral dans les pratiques pédagogiques et didactiques des enseignants-chercheurs et des enseignantes-chercheuses dans une perspective d’amélioration de l’enseignement/apprentissage en contextes éducatifs universitaires.
A NEW APPROACH FOR DISTANCE LANGUAGE LEARNING: COMPARING CURRENT PROGRAMS AND EFFECTIVENESS OF AUDIO EDITING PROGRAMS
Authors: Deregözü Aysel , Kanburoğlu Volkan
Published: May 2021

The main goal in language education is to develop learners’ skills in oral communication that enables to interact in the target language. Yet, in times of the pandemic, activities supporting the development of communicative competences are difficult to implement, as these activities are arranged mostly for in – class settings with the need of students’ interactive participation. Hence, language education needs to be adapted according to the new circumstances. The aim of this study is to examine how open source audio editing programs can support language education especially in promoting oral competences and implementing communicative activities for in – class language education with social distance and distanced language education. For this aim, open source audio editing programs are examined and compared in view of their features. Within this aim the programs Audacity, Ardour, Ecasound, Jokosher, MusE, Qtractor, Rosegarden, SoX, Sweep and Traverso DAW are examined. Furthermore, on the example of the program Audacity, some useful features for preparing audios in language education are presented. It is recommended to use these programs in language education.

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