bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of corrosion and scaling potentials of oilfield waters in an offshore producing facility, Niger Delta
Authors: Bolaji T. A. , Olumayede E. G. , Ojo A. M. 
Published: June 2022

Abstract
In this study, water samples from Miocene reservoirs, offshore Niger Delta, and seawater samples used for water injection were investigated in an attempt to examine the chemistry, evaluate the corrosion behaviour of steel, iron, and aluminium in different aqua media, and evaluate the scaling potentials of the oilfield produced waters (OFPW). Chemical analyses of the waters were determined; corrosion rate measurements were carried out by the weight loss method at room temperature while corrosion kinetics was carried out using conventional methods. Langelier saturation index (LSI), Ryznar stability index (RSI), Larson–Skold index (L–S), Puckorius scaling index (PSI), and aggressiveness index (AI) were evaluated for assessing the corrosiveness and scaling potential of the formation waters, using water quality data. The magnitude of corrosion of these metals was studied for an exposure period of 42 days. Chemical analysis revealed that the waters are slightly alkaline and generally classified as hard, saline water of the Na-Cl type based on its total dissolved solids (TDS). Produced water pH values range from 7.32 to 8.38. Results showed the likelihood of some of the water to form mild to severe scales based on the corrosivity indices, while the seawater samples are classified as ‘non-aggressive’ and ‘aggressive’. Steel has the highest corrosion rate with a value of 3.84 × 10−3 mg cm−2 h−1 compared to aluminium with the lowest rate of 0.37 × 10−3 mg cm−2 h−1. In most cases, the rate of corrosion of the metals followed the first-order rate constant in some of the samples, and the second-order in others within the first seven days. It was observed that the rate of corrosion follows this order: steel &gt; iron &gt; aluminium. The potential heavy and intolerable corrosion associated with the use of these seawater samples as injection waters is a potential risk that must be handled by adequate treatment.
Phytochemical and in-vitro Biological Investigation of Indian Traditional
Medicinal Plants for their Cytotoxicity and Hepatoprotective Potential
Authors: Thangavelu Prabha , Chaitanya MVNL , Selvaraj Jubie , Palanisamy Dhanabal , Usamo Firehiwot Belayneh 
Published: June 2022

Objective:
This study aimed to select 16 medicinal plants based on their folklore remedy
for treating various diseases like inflammation, cancer, etc., and scientifically validate their
potency.

Methods:
Five among them, namely Centella asiatica (CA), Myristica fragrans (MF), Trichosanthes
palmata (TP), Woodfordia fruticosa (WF), and Curculigo orchioides (CO), were scientifically
confirmed through the extraction and in-vitro cytotoxic and hepatoprotective evaluation. Based on
the cytotoxic and hepatoprotective results, the various fractions of CO were chosen for an in-depth
phytochemical study to isolate and characterize active compounds by GC-MS.

Results:
The results showed promising cytotoxic activity (i.e., IC50=<100 μg/ml) against HeLa cell
lines and significant hepatoprotective activity in a dose-dependent manner on CCl4 intoxicated
isolated hepatocyte cells.

Conclusion:
The present study confirmed the scientific evidence regarding the effectiveness of
selected medicinal plants in HeLa and hepatocyte cells. Furthermore, a detailed study on their
mechanism of action and clinical application is suggested.
A curiosidade das coisas, objetos e sujeitos no romance do incidente de Mark Haddon
Authors: Sá Luiz Fernando Ferreira 
Published: June 2022

Começo com um momento de The Curious Incident of the Dog in the Night-time (2003), de Mark Haddon, descrevendo um encontro com as coisas, na forma de uma enumeração e um tipo de colecção, onde vida corporal, sensorial, mental e imaginativa se fundem. Ao sondar as fronteiras porosas, afinidades e fricções entre sujeitos e objetos contemporâneos, com corpos, mentes especiais e coisas, este ensaio desenvolve novas abordagens para noções de materialidade, o mundo do objeto e a experiência corporificada enquanto também questiona desenvolvimentos na área da cultura material, estudos do objeto, fenomenologia cultural e teoria das coisas. Haddon e Boone (o narrador/protagonista) insistiram na base material de todos os aspectos da existência humana e finalmente concluíram que o sujeito pode ser transformado materialmente por meio da interação com objetos.
Portable Construction Maps (PCM) using location fingerprint positioning algorithm for construction worker safety
Authors: Rasyid Annurdien , Firdaus Ahsan , Setiawan Dwi , Fitri Hajidah Salsabila Allissa , Setialana Pradana 
Published: June 2022

The existence of a work from home policy does not seem to have a substantial impact on construction workers. Cases of work accidents on infrastructure projects during the Covid-19 pandemic experienced a significant increase. As reported by BPJamsostek data that the number of work accident insurance claims in the first semester (January-June) 2020 reached 108,573 cases. An increase of 128% over the same period in the previous year. One of the steps from the construction side to minimize the occurrence of work accidents is by marking dangerous locations or limiting them with a yellow line. The supervision is carried out by the Occupational Health and Safety division which supervises every worker by using hearing and sight senses. However, this supervision is deemed less effective and efficient considering the number of work accidents that continue to increase over time. Therefore, a worker location monitoring system based on An indoor positioning system called Portable Construction Maps (PCM) Using Location Fingerprint Positioning Algorithm for Construction Worker Safety was developed. The development of this system uses the algorithm Location Fingerprint as a method for estimating the location of workers in a construction building. Each worker will bring a device called the Worker Tag, in which there is a microcontroller (Espressif 32) with WiFi and Bluetooth module, which is used to capture wifi and bluetooth signals and calculate the Received signal strength indication(RSSI) which will be sent to the server to be processed using the location fingerprint algorithm. In addition, in the worker tag there is also a Passive Buzzer that is used to alert workers if they enter a dangerous area.
Colleges of education science student engagement in Emergency Remote Teaching amidst COVID-19 in Nigeria
Authors: Ganiyu Bello 
Published: June 2022

There is paucity of studies on the affective, behavioural, and cognitive dimensions of student engagement under Emergency Remote Teaching (ERT) during COVID-19 pandemic, especially among pre-service science teachers in Colleges of Education in Nigeria. The purpose of this descriptive survey study was to examine the affective, behavioural, cognitive, and general level of engagement of pre-service science teachers in Colleges of Education in Kwara State, Nigeria in online ERT class. Purposive and snowballing sampling techniques were used to select six education colleges and 241 students which participated in the study respectively. The reliability coefficient of the online questionnaire used for data collection in the study was 0.81. The data gathered in this study were analysed using mean and independent t-test. The findings indicated that the level of student general engagement was high and there was significant gender difference in the levels of student behavioural engagement (X2(2) = 7.561, p = 0.023< .05) in favour of male students. It was concluded that Colleges of Education students’ level of affective, behavioural, cognitive, and general engagement in ERT was high. The researcher recommended that students should extend their high level of general engagement in online ERT class to face-to-face classes after COVID-19 pandemic.
Bibliometric analysis of studies on the Flipped Classroom Model in biology teaching
Authors: Bozdağ Hüseyin Cihan , Türkoğuz Suat , Gökler İsa 
Published: June 2022

The global acceleration of studies on the Flipped Classroom Model (FCM) has revealed the necessity of literature review analyzes that shed light on research activities by examining the research data as a whole. Therefore, in this study, it is aimed to examine academic publications on the FCM studies applied in biology teaching in terms of bibliographic variables. For this aim, the bibliometric analysis method was preferred in the study, which was carried out with a case study approach for an in-depth examination. Within the scope of the study, 53 publications obtained from the Scopus database for the entire time period were examined. In order to analyze these publications as a whole, the Scopus database and the VOSviewer program was used. According to the results, it is determined that the most preferred keywords are flipped classroom, active learning, online learning, flipped learning and biology, the most commonly used terms in the title and abstract section are students, courses, classroom, study and flipped classroom, the most common types of publications are article and papers, the most active country in terms of the number of studies is the USA, and the publication language is generally English. This study will help researchers and educators identify trends and issues that can guide future work involving the FCM.
Pendekatan Scaffolding pada Pembelajaran Biologi Materi Sistem Pencernaan Untuk Meningkatkan HOTS Siswa Kelas XI SMA di Kabupaten Ogan Komering Ulu Timur
Authors: Purwadi Joko , Hidayat Saleh , S.W. Sumah Astrid 
Published: June 2022

This research is motivated by the lack of teacher innovation in strategic approaches to students during the learning process which causes students to be less enthusiastic about participating in learning. The purpose of this study was to improve the Higher Order Thinking Ability (HOTS) of high school students in East OKU District through a scaffolding approach to learning the human digestive system. The research method used is a quasi-experimental research by giving a pre-test to the experimental class. The sampling technique used was purposive sampling. Data were collected by direct observation, the test was tested through post-test and pretest, closed questionnaire to the teacher directly, and documentation. Data analysis was carried out by using questionnaire analysis, observation analysis, test analysis, and Higher Order Thinking Ability (HOTS) analysis. The results showed that the experimental class had a significant increase in Higher Order Thinking ability (HOTS) and the scaffolding approach in learning biology of the human digestive system material could improve the higher order thinking skills of XI SMA students in East OKU District.

Key words: Scaffolding Approach, Biology Learning, and HOTS

Abstrak

Penelitian ini dilatar belakangi oleh, kurangnya inovasi guru dalam strategi pendekatan kepada siswa pada saat proses belajar yang menyebabkan siswa kurang antusias mengikuti pembelajaran. Tujuan dari penelitian ini adalah untuk meningkatkan Kemampuan Berpikir Tingkat Tinggi (HOTS) siswa kelas XI SMA di Kabupaten OKU Timur melalui pendekatan Scaffolding pada pembelajaran sistem pencernaan manusia. Metode penelitian yang digunakan adalah kuasi eksperimen (quase eksperimental research) dengan memberikan pree-test pada kelas eksperimen. Teknik pengambilan sampel digunakan purposive sampling. Data dikumpulkan dengan observasi melalui secara langsung, Tes soal diujikan melalui post-test dan pretest, angket tertutup kepada guru secara langsung, dan dokumentasi. Analisis data dilakukan dengan analisis angket, analisis observasi, analisis tes, dan analisis Kemampuan Berpikir Tingkat Tinggi (HOTS). Hasil penelitian menunjukkan bahwa kelas eksperimen terjadi peningkatan Kemampuan Berpikir Tingkat Tinggi (HOTS) yang signifikan dan pendekatan scaffolding pada pembelajaran biologi materi sistem pencernaan manusia dapat meningkatkan kemampuan berpikir tingkat tinggi siswa kelas XI SMA di Kabupaten OKU Timur.

Kata kunci: Pendekatan Scaffolding, Pembelajaran Biologi, dan HOTS
PENGATURAN PEMBUATAN SURAT IZIN TEMPAT USAHA BERDASARKAN KONSEP TATA RUANG PERKOTAAN
Authors: Puspita Sari Meri , Budhiartie Arrie , Fauzani Raharja Ivan 
Published: June 2022

Dinas Penanaman Modal dan Pelayanan Satu Pintu Kota Jambi adalah instansi pemerintah yang mempunyai kewenangan yang bersifat konkuren. Tugas dari Dinas ini ialah menberikan pelayanan terhadap penanaman modal dan pelayanan perizinan serta non perizinan di Kota Jambi. Dalam pembuatan Surat Izin Tempat Usaha (SITU) khususnya izin usaha pada hiburan umum yang memanfaatkan ruang perkotaan harus berdasarkan konsep dari tata ruang perkotaan sesuai dengan peraturan perundang-undangan yang berlaku. Penelitian ini bertujuan untuk mengetahui bagaimana pembuatan dan penegakan sanksi administrasi terhadap penerbitan SITU khususnya izin usaha hiburan umum. Penelitian ini merupakan penelitian yuridis normatif yang bersifat deskriptif kualitatif. Hasil penelitian memperlihatkan bahwa penerbitan SITU Kota Jambi tidak didasarkan pada konsep tata ruang yang telah diatur didalam PERDA. Hal ini terjadi karena dalam Peraturan Daerah Kota Jambi Nomor 9 Tahun 2010 Tentang Rencana Tata Ruang Wilayah (RTRW) Kota Jambi terdapat ketidakjelasan norma yang mengakibatkan timbulnya penafsiran dan pemahaman yang berbeda terhadap persyaratan pembuatan SITU. Hal ini disebabkan oleh (1) adanya norma yang melahirkan ketidakjelasan dalam pengambilan keputusan pejabat Tata Usaha Negara (TUN) yang menimbulkan kerugian pada masyarakat berupa gangguan di wilayah tempat usaha tersebut berdiri, (2) adanya tindakan terhadap penegakan hukum administrasi yang berupa keputusan. Saran untuk pejabat pemerintah Kota Jambi yang berwenang untuk merevisi atau memperbaiki Peraturan Daerah Nomor 9 Tahun 2013 Tentang Rencana Tata Ruang Wilayah Kota Jambi mengenai isi dalam pengaturan kawasan peruntukan perdagangan dan jasa serta ketentuan perizinan agar usaha-usaha yang memanfaatkan ruang Kota Jambi dapat terarah sehingga terpenuhinya hak-hak dan kewajiban masyarakat sekitar khususnya Kota Jambi dalam pembangunan, pelaksanaan, dan pengawasan tata ruang Kota Jambi.
PENYELESAIAN PERSELISIHAN HUBUNGAN INDUSTRIAL MELALUI MEDIASI PADA DINAS TENAGA KERJA KOPERASI DAN UKM KOTA JAMBI
Authors: Febrian Rifqi , Fitria Fitria 
Published: June 2022

Tujuan dari penelitian Ini adalah Penyelesaian Perselisihan Hubungan Industrial melalui mediasi pada Dinas Tenaga Kerja Koperasi dan Ukm Kota Jambi adalah untuk mengetahui Proses Pelaksanaan Penyelesaian Perselisihan Hubungan Industrial. melalui mediasi dan untuk mengetahui bentuk penyelesaian mediasi yang dilakukan oleh mediator dalam menyelesaikan Perselisihan Hubungan Industrial Pada Dinas Tenaga Kerja Koperasi dan Ukm Kota Jambi. Mediasi merupakan upaya yang dilakukan pemerintah dalam menyelesaikan Perselisihan Hubungan Industrial diluar pengadilan berdasarkan Undang-Undang Nomor 2 Tahun 2004 tentang Penyelesaian Perselisihan Hubungan Industrial. Upaya Mediasi dilakukan untuk mencapai Penyelesaian Perselisihan Hubungan Industrial yang cepat, tepat, adil, dan murah. Metode yang digunakan dalam penelitian ini adalah metode penelitian hukum empiris. Metode Penelitian empiris digunakan untuk mengetahui permasalahan-permasalahan yang sebenarnya terjadi di lapangan. Hasil dari penelitian yang dilakukan penulis menemukan bahwa Penyelesaian Perselisihan Hubungan Industrial melalui mediasi pada Dinas Tenaga Kerja Koperasi dan Ukm Kota Jambi , Pelaksanaan penyelesaian perselisihan melalui mediasi pada dinas Tenaga kerja Koperasi dan Ukm Kota Jambi dari tahun 2017 sampai 2019 tidak semuanya mencapai kesepakatan dengan membuat perjanjian Bersama hanya 60 % yang dapat dilakukan dan anjuran 20% dan tutup kasus 20%.Penelitian ini diharapkan agar mediator ditambah karena hanya 2 mediator yang ada di Dinas Tenaga Kerja Koperasi dan Ukm dan Kota Jambi karena lebih kurang 1.700 Kasus dan tidak sebanding. Disamping para pihak harus Kooperatif. Penelitian ini diharapkan dapat memberikan sumbangsih pemikiran dan diharapkan memberikan masukan dan saran demi kesempurnaan karya tulis ilmiah ini.
BAGAIMANA SISWA YANG MEMILIKI KEMAMPUAN MATEMATIKA BERBEDA MEMECAHKAN MASALAH CERITA KOMBINASI
Authors: Nuriadin Ishaq , Cahya Ningrum Fitria , Slamet Slamet 
Published: June 2022

Pemecahan masalah matematika telah menjadi suatu elemen penting dalam proses pembelajaran matematika yang harus terus ditingkatkan. Eksplorasi bagaimana tahapan memecahkan masalah matematika menjadi faktor fundamental sebelum mengembangkan kemampuan pemecahan masalah. Tujuan dari penelitian ini ingin mengeksplorasi bagaimana cara siswa dengan kemampuan matematika berbeda memecahkan masalah kombinasi. Penelitian ini menggunakan metode kualitatif dengan menggunakan tes matematika dan mewawancarai secara mendalam terkait dengan hasil pekerjaan siswa. Data yang sudah didapatkan dianalisis data dengan cara mereduksi data, penyajian data dan menarik kesimpulan. Hasil penelitian diperoleh subjek 1 dapat memecahkan masalah pada kategori baik, subjek 2 dapat memecahkan masalah pada kategori cukup dan subjek 3 memecahkan masalah pada kategori kurang. Kontribusi. Penelitian ini diharapkan dapat menjadikan gambaran data serta memberikan wawasan serta pengalaman penelitian untuk penelitian selanjutnya.
THE DEVELOPMENT OF STUDENTS WORKSHEET STEM BASED ON MIKiR
Authors: Yulisra Elsa , Alim Jesi Alexander , Noviana Eddy , Hermita Neni , Wijaya Tomi Tanu , Putra Zetra Hainul , Pareira Jerito 
Published: June 2022

Penelitian ini bertujuan untuk melakukan pengembangan terhadap Lembar Kerja Peserta Didik (LKPD) dengan model STEM berbasis MIKiR untuk tema 2 “Selalu Berhemat Energi” pada kelas IV Sekolah Dasar dengan menggunakan model Plomp (2013). Tahapan pengembangan yang dilakukan dengan tiga fase: Preliminary Research Phase, Prototyping Phase, dan Assessment Phase. Data penelitian ini dikumpulkan dengan cara observasi, wawancara dan angket. Pengolahan data pada penelitian ini dilakukan dengan cara analisis kuantitatif deskriptif dan kualitatif deskritif. LKPD yang telah dikembangkan divalidasi oleh tiga orang ahli yang terdiri dari ahli media dan ahli materi dan memperoleh persentase skor validasri rata-rata 93,52%. Sedangkan kepraktisan dilihat dari angket respon guru dengan persentase skor rata-rata sebesar 85,99%. Maka dapat disimpulkan LKPD STEM Berbasis MIKiR yang dikembangkan valid dan praktis dan dapat digunakan dalam pembelajaran. This study aims to Development the Student Worksheet with the STEM based on MIKiR for theme 2 “Always Save Energy” in grade 4 Elementary School using the Plomp model (2013). The development stage is carried out in three stages: Preliminary Research Stage, Prototyping Stage, and Assessment Phase. The research data were collected using observation, interviews, and questionnaires. Data processing in this study was carried out using quantitative decriptive and qualitative decriptive analysis. The worksheets that were developed are validated by three experts consisting of media experts and material experts , with an avarage skore percentage is 93,52%. Meanwhile, practicality can be seen from the questionnaire responses of teachers, with an avarage skore percentage is 85,99%. In conclusion, the Student worksheet STEM based on MIKiR developed is valid and practical and can be used in learning.
MATH TEACHER QUESTIONS CAN HELP STUDENTS AROUND COFFEE PLANTATIONS TO BEHAVE CRITICAL THINKING
Authors: Kurniati Dian , Hobri Hobri , Asari Abdur Rahman , Osman Sharifah 
Published: June 2022

The questions asked by the teacher affect students' thinking processes. So, it is necessary to do research that aims to describe what types of questions can provoke students to behave critically. The research subjects were 40 junior high school students around a coffee plantation in Jember, Indonesia. The data collection methods in this study were (1) test, (2) observation, and (3) interview. Each test was given two questions that meet the criteria for critical thinking behavior with the theme of coffee. The test is given at the end of mathematics lessons every Monday. Observations focused on three critical thinking behaviors, namely truth-seeking, open-mindedness, and inquisitiveness. Interviews were conducted at the end of the activity, namely after five learning meetings. There are two findings in this research. First, junior high school students around coffee plantations are accustomed to truth-seeking, open-mindedness, and inquisitiveness in responding to questions from teachers. The habit of students in responding to teacher questions begins at the third meeting in learning. Second, there are three types of questions that can provoke students to behave critically. The three types of questions are questions that require students to construct concepts, principles, and procedures.Soal-soal yang diberikan oleh guru selama pembelajaran di kelas mempengaruhi proses berpikir siswa. Sehingga perlu dilakukan penelitian yang bertujuan untuk mendeskripsikan jenis pertanyaan apa yang dapat menstimulus siswa untuk berperilaku kritis. Subjek penelitian adalah 40 siswa SMP di sekitar perkebunan kopi di Jember, Indonesia. Metode pengumpulan data pada penelitian ini adalah (1) metode tes, (2) metode observasi, dan (3) metode wawancara. Setiap tes diberikan dua soal yang memenuhi kriteria perilaku berpikir kritis dengan tema kopi. Soal yang diajukan merupakan soal yang menitikberatkan pada konstruksi konsep, prinsip, dan prosedur dalam matematika. Tes diberikan pada akhir pelajaran matematika setiap hari Senin. Pengamatan difokuskan pada tiga perilaku berpikir kritis, yaitu pencarian kebenaran, keterbukaan pikiran, dan rasa ingin tahu. Wawancara dilakukan pada akhir kegiatan yaitu setelah lima kali pertemuan pembelajaran. Ada dua temuan dalam penelitian ini. Pertama, siswa SMP di sekitar perkebunan kopi terbiasa mencari kebenaran, memiliki pemikiran terbuka, dan rasa ingih tahu dalam menjawab pertanyaan dari guru. Kebiasaan siswa dalam menanggapi pertanyaan guru dimulai pada pertemuan ketiga dalam pembelajaran. Kedua, ada tiga macam soal yang dapat menstimulus siswa untuk berperilaku kritis. Ketiga jenis soal tersebut merupakan soal yang menuntut siswa untuk menyusun konsep, prinsip, dan prosedur.
Ophthalmic release of in situ gel Ciprofloxacin HCl based on combination of Hypromellose and HPC
Authors: Wardhana Yoga Windhu , Budiati Wieke , Oktavia Rizky Dwi , Widyanti Kalista Tritama , Kurniawansyah Insan Sunan , Herdiana Yedi 
Published: June 2022

The development for ophthalmic delivery was purposed to achieve optimum drug loading for ocular therapeutic benefits. An adequate dose of the drug is needed to absorb in the conjunctival sac to take effect. In situ gel preparation was expected to provide these needs with the polymer aid that makes the droplets suddenly coagulate in the eye area to maintain the drug dose. The in situ gel dosage form is desired to overcome the poor bioavailability of conventional ciprofloxacin HCl eye drops on the market. Thus, this work was studied using two cellulose polymers such as hydroxyl propyl cellulose (HPC) and hydroxypropyl methylcellulose (HMPC) as a gelling forming agent. The effect of the in situ ophthalmic quality of the gel due to the two individual polymers separately and their combined use was investigated. The in situ gel quality includes the ability of gel-forming under the influence of varying temperature and stirring frequency difference (as a rheological study) was tested together with the drug release model model. Other ophthalmic preparation quality parameters such as clarity, pH measurement, drug content determination, sterility, and antibacterial activity have been evaluated. However, overall in situ gel formulation developed was of better quality compared to the conventional one. Consideration of the choice of cellulose derivative polymer type is seen to affect the quality of controlled release kinetics models.Keywords: Ophthalmic gel, Ciprofloxacin HCl, HPMC, HPC, Drug release kinetics