bluuebunny/crossref_metadata_2025 huggingface dataset:
Developing education leaders through creative approaches.
Authors: Quinsee Susannah , Parker Pam
Published: September 2024

There has been a considerable interest in how to develop effective leaders for higher education but there has been limited research in this area (Stefani, 2015). Quinsee and Parker (2017) discussed the lack of leadership development and support available for those in these roles and that this is an area that needed to be explored further. The changing nature of higher education with increased marketisation, higher student demand, rising workloads, and a changing student demographics, have all created challenges for university leaders. Over the past two years Covid-19 pandemic increased the range of challenges leaders had to manage and this for many has meant drawing on a wide range of skills and being creative in approaches to problem-solving (Kennie & Middlehurst, 2021). Effective leadership for the 21st century requires innovative approaches to lead organisations (Basadur, 2004). Creating opportunities for leadership development that are engaging and exploring different ways of supporting emerging leaders is therefore an area of increased interest. The importance of playful learning in creating a safe and supportive learning environment and supporting individuals to build resilience from learning from failure as well as success cannot be underestimated (Whitton & Moseley, 2019). This paper explores how different approaches to leadership development and support have been explored at City St George’s, University London many of them according with Moseley’s principles around playful leadership (Moseley, 2021).
Effect of Laser Irradiation with 532 nm Wavelength on The Optical Properties of PVA/MR Solutions
Authors: Hasan Suadad Saad , AbdulWahhab Nihal A. , Taj-Aldeen L.
Published: September 2024

Background: This work aims to study the impact of 532 nm laser irradiating on the optical properties of the Polyvinyl alcohol/ Methyl Red (PVA/MR) solution before and after laser irradiation  32mW with various times (0, 20, 30 and 40) minutes.
 
Materials and Methods:
The polymer (PVA) powder 500 mg was dissolved in 50 ml distilled water at temperature 80 ˚C and the methyl red (MR) 30 mg was dissolved in 10 ml at temperature 80 ˚C using solution dilution formula  . A semiconductor laser with a wavelength of 532 nanometers was used to irradiate the solution.
 
Results:
The absorbance, reflectance, and transmittance spectrum of solution prior to and following laser irradiation were recorded. Then, the optical constants and energy gap were calculated.
 
Conclusions:
The irradiation with the 532nm laser leads to a break of the bonds (From the absorbance spectrum, it decreases as the irradiation time increases. This indicates the breaking of bonds.) that results in an increase in the transmittance spectrum, and the energy gap.
Predictable correlation between ACTH and Cortisol in Women with Aborted Pregnancies and its Association with Cytomegalovirus (CMV) Infection
Authors: Ali Hawraa Ahmed , Abdul-Razzag Mohammed Sabri , Al-Jeborry Milal Muhammad
Published: September 2024

Background: Abortion is a spontaneous termination of pregnancy with various causes, including infections like cytomegalovirus (CMV). Cytomegalovirus is a common viral infection that can affect various organs and systems in the body. Aim of study: This research aims to investigate the concertation level of Cortisol and ACTH hormones that may play a role in crucial processes during pregnancy.                                                 
 Materials and methods: This study conducted at Maternity and Children's Hospital in  Hilla from November 2023 to March 2024 focused on 250 women who had undergone abortions. Participants were divided into two groups: 200 women with abortions (Positive Group) and 50 healthy married women (Control Group).
Results: we found 60 Cytomegalovirus were positively obtained from women with abortion, The serological diagnosis for CMV-positive samples found that 6  samples were seropositive to CMV IgM,  14  samples were seropositive for both IgM & IgG, and 40 (samples were seropositive for CMV IgG only. The study investigated the concertation hormone levels of Cortisol and ACTH in women who had experienced abortions with cytomegalovirus (CMV) infection compared to a Control group of healthy married women. The results showed that the patient group had significantly lower cortisol levels, at a mean value of 42.1158. On the other hand,(ACTH) of (78.1468).conclusion: High levels are present in the blood of women with CMV. There is a decreased level of Cortisol in women miscarriage with CMV infection which is statically significant.
Occurrence of Isoyake in kelp beds of Saccharina japonica in Primorskii, far-east Russia
Authors: Kawai Tadashi , Shinada Akiyoshi , Krupnova Tatiana , Yotsukura Norishige
Published: September 2024

A decline in the abundance of the seaweed Saccharina japonica has occurred in Primorskii, far-eastern Russia. Most of the seaweed has disappeared at this location, resulting in a barren coastline known as Isoyake. Field surveys conducted from 1975 to 2015 in Valentin Bay revealed a significant decline in the seaweed population. This decline correlated with fluctuating water temperatures. In the period 1980 to 1990, water temperatures tended to be lower, then increased in the period 2000–2010, and again decreased in temperatures in 2010–2019. Despite lower temperatures after 2010, Isoyake persisted. These findings emphasize the need for continued monitoring and deeper investigation of the environmental and ecological drivers behind Isoyake, with implications for conservation and sustainable management of seaweed resources in far-east Russia.
Pemanfaatan Bahan Anestesi Alami pada Transportasi Sistem Tertutup Benih Ikan: Ulasan Artikel
Authors: Ghaida Anrose Zahrah Alifia , Junianto
Published: September 2024

Benih ikan merupakan faktor utama dalam keberhasilan kegiatan akuakultur. Namun pembudidaya tengah merasakan sulitnya memperoleh penyuplai benih berkualitas dan menyebabkan minimnya pasokan di beberapa daerah. Hal ini menyebabkan pembudidaya harus memutar otak. Salah satu cara yang dapat dilakukan yaitu dengan melakukan transportasi basah sistem tertutup dari tempat penyuplai benih yang berkualitas. Bahan anestesi secara kimia sintetis dan alami dapat dimanfaatkan untuk mempertahankan benih ikan tetap hidup dengan kondisi yang sehat serta menekan angka mortalitas selama pengangkutan. Anestesi kimia sintetis memiliki kekurangan jika digunakan secara terus-menerus karena dapat merusak fungsi kekebalan dan mengganggu kesehatan benih. Oleh sebab itu, dilakukan penyusunan kajian literatur untuk memberikan informasi mengenai ragam senyawa alami yang dapat digunakan sebagai pengganti kimia sintetis dalam kegiatan anestesi benih ikan selama proses transportasi basah sistem dengan menggunakan metode studi pustaka. Bahan alami yang dapat dimanfaatkan sebagai anestesi pengganti kimia sintetis adalah minyak cengkeh, minyak sereh, ekstrak akar tuba, ekstrak ubi kayu aksesi batin, ekstrak daun pepaya, buah keben, ekstrak daun bandotan, dan ekstrak daun jambu biji. Berdasarkan beberapa bahan anestesi alami tersebut, didapati tiga jenis yang paling efektif. Ekstrak ubi kayu aksesi batin merupakan hasil yang paling optimal untuk transportasi benih ikan nila dengan persentase kelangsungan hidup sebesar 100%. Selain itu, ekstrak daun pepaya memberikan hasil terbaik pada kelangsungan hidup benih ikan kerapu macan sebesar 100%, sementara ekstrak akar tuba menunjukkan 98,3% kelangsungan hidup benih ikan nila.
Pengaruh Metode Hypnoteaching dalam Pembelajaran Matematika Terhadap Hasil Belajar Siswa Kelas III SD
Authors: Afifatul Amalia , Erna Zumrotun
Published: September 2024

Menempatkan siswa sebagai pusat kegiatan belajar mengajar, mampu mendorong mereka untuk lebih aktif dalam keikutsertaannya ketika aktivitas pengajaran berlangsung. Pemakaian metode oleh guru yang sejalan dengan tahapan belajar siswa, menjadi satu dari sekian banyak cara yang bisa membangkitkan keaktifan mereka dalam kegiatan belajar mengajar. Pelaksanaan riset ini ditujukan guna mengevaluasi pengaruh metode hypnoteaching dalam pembelajaran matematika terhadap hasil belajar siswa kelas III SD melalui penelitian eksperimental. Pada riset ini, subjek kajiannya ialah sampel dari 11 siswa yang berasal dari kelas III SD Negeri Berahan Kulon yang terbagi atas 8 siswa perempuan dan 3 laki-laki. Data data pada riset ini dikumpulkan melalui dokumentasi dan latihan soal matematika siswa dengan materi penjumlahan bersusun. Uji validasi memakai expert jugment dan analisis indeks aiken’v. Uji prasyarat memakai uji normalitas dengan bantuan SPSS Versi 20. Pengujian hipotesis memakai uji t dua sampel dependen (paired-samples t-test) bantuan SPSS Versi 20. Setelah penelitian dilaksanakan, diperoleh hasil adanya ketidaksamaan hasil belajar dalam pembelajaran matematika siswa. Temuan yang ada dibuktikan dengan hasil uji t dua sampel dependen yaitu sig < 0,005 atau 0,004 < 0,005. Sehingga bisa ditarik simpulan,  melalui pemakaian metode hypnoteaching sangat berpengaruh terhadap hasil belajar dalam pembelajaran matematika siswa kelas III SD Negeri Berahan Kulon Kecamatan Wedung Kabupaten Demak.
APLIKASI JENIS MULSA ORGANIK DAN INTENSITAS PENYIRAMAN TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KACANG HIJAU (Vigna radiata L.)
Authors: Rohanah Siti , Firnia Dewi , Roidelindho Kiki , Rohmawati Imas
Published: September 2024

Penelitian ini bertujuan untuk mengevaluasi pengaruh jenis mulsa organik dan intensitas penyiraman terhadap pertumbuhan dan hasil tanaman kacang hijau (Vigna radiata L.) di Banten. Kajian dilakukan menggunakan Rancangan Acak Kelompok (RAK) dengan faktorial 3 taraf jenis mulsa organik dan 3 taraf intensitas penyiraman, diulang sebanyak 3 kali. Hasil pengamatan mencakup tinggi tanaman, jumlah daun, jumlah polong per tanaman, bobot basah tanaman, bobot kering tanaman, bobot biji basah, dan bobot biji kering. Analisis menunjukkan bahwa jenis mulsa organik jerami padi berpengaruh pada beberapa parameter pertumbuhan tanaman, sementara intensitas penyiraman setiap hari memberikan pengaruh yang signifikan terhadap hasil tanaman. Interaksi antara jenis mulsa organik dan intensitas penyiraman tidak diamati dalam penelitian ini.
PENGARUH JENIS SUMBU DAN MEDIA TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN PAKCOY (Brassica rapa subsp. L) VARIETAS MASBRO SECARA HIDROPONIK SISTEM WICK
Authors: Juniarti Bela , Ritawati Sri , Roidelindho Kiki , Fatmawaty Andi Apriany
Published: September 2024

Tujuan penelitian ini yakni menentukan jenis sumbu dan media tanam yang paling efektif dalam meningkatkan pertumbuhan dan hasil tanaman pakcoy. Selain itu, penelitian ini juga mengevaluasi apakah terdapat interaksi antara jenis sumbu dan media tanam terhadap pertumbuhan dan hasil tanaman pakcoy. Kajian merupakan penelitian eksperimen yang dilaksanakan di Kawasan Sistem Pertanian Terpadu Banten (Sitandu Banten), Kecamatan Curug, Kota Serang, Provinsi Banten, dari bulan Februari hingga April 2024 menggunakan Rancangan Acak Kelompok (RAK). Hasil penelitian menunjukkan bahwa jenis sumbu dan media tanam dapat meningkatkan pertumbuhan dan hasil tanaman pakcoy. Jenis sumbu kain flannel (N1) memberikan hasil terbaik pada parameter jumlah daun, lebar daun, bobot basah, dan bobot kering. Perlakuan jenis sumbu kain wol (M4) dan media tanam rockwool lebih efisien digunakan untuk pertumbuhan pakcoy. Perlakuan media tanam menunjukkan hasil terbaik terhadap parameter jumlah daun, panjang daun, lebar daun, dan tinggi tanaman. Terdapat interaksi antara jenis sumbu dan media tanam terhadap jumlah klorofil, sedangkan pada parameter lainnya tidak terdapat interaksi antara jenis sumbu dan media tanam terhadap pertumbuhan dan hasil tanaman pakcoy.
PENGEMBANGAN INTEGRASI TAM DENGAN FLOW THEORY DAN MOBILE APP DESIGN QUALITY PADA PENGGUNA E-COMMERCE DI BALI
Authors: Widagda I Gst. Ngr. Jaya Agung , Adnyani I Gusti Ayu Dewi , Rahmayanti Putu Laksmita Dewi , Septiani Emilia
Published: September 2024

Tujuan penelitian ini adalah untuk menguji dan menjelaskan pengaruh persepsi kemudahan penggunaan, persepsi kemanfaatan, dan kualitas desain mobile app terhadap perceived flow (persepsi pengalaman) dan niat untuk terus menggunakan.  Populasi penelitian ini adalah konsumen yang menggunakan e-commerce di Bali yang jumlahnya tidak diketahui. Besarnya sampel yang digunakan sebanyak 180 orang dengan metode purposive sampling. Teknik analisis yang digunakan adalah Path Analysis dengan menggunakan SEM-PLS. Hasil penelitian menunjukkan bahwa persepsi kemudahaan penggunaan tidak berpengaruh terhadap niat untuk terus menggunakan, sedangkan persepsi kemanfaatan dan kualitas desain mobile app berpengaruh positif dan signifikan terhadap niat untuk terus menggunakan, dan persepsi kemudahan penggunaan, persepsi kemanfaatan, kualitas desain mobile app berpengaruh positif dan signikan terhadap persepsi pengalaman, serta persepsi pengalaman berpengaruh positif dan signifikan terhadap niat untuk terus menggunakan. Oleh karena itu penting bagi e-commerce di Bali untuk selalu memperhatikan persepsi kemudahaan penggunaan, persepsi kemanfaatan, kualitas desai mobile app dalam rangka meningkatkan persepsi pengalaman dan niat untuk terus menggunakan.
Pengaruh e-leadership dan e-culture terhadap produktivitas kerja yang dimediasi oleh work engangement
Authors: Ningsih Fidia , Suryosukmono Gerry
Published: September 2024

Digital transformation requires organizations to adapt to technological developments so that their organizations can survive in the future. The aim of this research is to determine the impact of e-leadership and e-culture on work productivity through work engagement. The type of research used is associative research with a quantitative approach. The sampling technique uses simple random sampling technique. The samples in this research were employees in two technical implementation units under the Ministry of Law and Human Rights in the Bengkulu area, namely the Class IIB Bengkulu Women's Correctional Institution and the Class II Bengkulu Special Development Institution for Children. The total sample in this study was 120 employees. This research uses a questionnaire as the main method of data collection. The analysis method uses SEM-PLS. Based on research results, e-leadership has a positive and significant effect on work productivity with a t-value of 3.977 and a P-value of 0. E-leadership also has a positive and significant effect on work engagement with a t-value of 2.97 and P- value of 0.003. Furthermore, e-culture has a positive and significant effect on work productivity with a t-value of 2.326 and a P-value of 0.02. For the influence of e-culture on work engagement, the influence of work engagement on work productivity, the indirect influence of e-Leadership on work productivity through work engagement and the indirect influence of e-culture on work productivity through work engagement in this study were stated to not have a positive influence and significant.
ANALISIS KEMAMPUAN KERJA, MOTIVASI KERJA DAN DISIPLIN KERJA TERHADAP KINERJA KARYAWAN
Authors: Esti Santoso Eko , Mariana Mariana
Published: September 2024

Sumber daya manusia (SDM) yang berkualitas merupakan salah satu faktor kunci keberhasilan suatu perusahaan. Dalam perusahaan sumber daya manusia memegang peranan yang sangat penting oleh karena dipandang sebagai faktor pendorong yang utama dalam menentukan keberhasilan suatu perusahaan. Tujuan penelitian ini untuk mengetahui pengaruh signifikan secara parsial dan simultan antara Kemampuan Kerja, Motivasi Kerja dan Disiplin Kerja Terhadap Kinerja Karyawan BUMD PT Patut Patuh Patju Lombok Barat. Jenis penelitian yang digunakan adalah penelitian kuantitatif asosiatif, dalam penyebaran data digunakan angket untuk mengumpulkan data dengan jumlah populasi 42 orang karyawan dengan teknik sampel jenuh, dimana semua populasi dalam penelitian ini dijadikan sampel. Analisis data yang digunakan adalah analisis regresi linier berganda dengan bantuan program software SPSS. Hasil penelitian Kemampuan Kerja tidak berpengaruh signifikan Terhadap Kinerja Karyawan. Motivasi Kerja Untuk berpengaruh signifikan Terhadap Kinerja Karyawan. Disiplin Kerja tidak berpengaruh signifikan Terhadap Kinerja Karyawan. Secara simultan Kemampuan Kerja, Motivasi Kerja Dan Disiplin Kerja berpengaruh signifikan Terhadap Kinerja Karyawan BUMD PT Patut Patuh Patju Lombok Barat.
Pengaruh Penerapan Green Accounting dan Environmental Cost Terhadap Kinerja Keuangan pada Perusahaan Makanan dan Minuman
Authors: Nur’aini Nur’aini , Permadi Karpriana Angga , Noviarty Helisa
Published: September 2024

Tujuan dari penelitian ini untuk menentukan apakah green accounting dan environmental cost berpengaruh terhadap kinerja keuangan pada perusahaan makanan dan minuman tahun 2021-2023 yang terdaftar di Bursa Efek Indonesia. Penelitian ini menggunakan teknik purposive sampling sehingga data sekunder yang digunakan menggunakan kriteria khusus yang peneliti dapat dari data sekunder annual report dan sustainability report. Terdapat total 66 sampel (terdiri dari 22 perusahaan) selama tiga (3) tahun yang peneliti gunakan dan dianalisis menggunakan perangkat lunak (software) Statistical Program for Social Science versi 29. Analisis data yang peneliti gunakan meliputi analisis statistik deskriptif, uji asumsi klasik, analisis regresi linear berganda serta pengujian hipotesis. Variabe independen (bebas) meliputi akuntansi hijau (green accounting) yang di ukur dengan dummy PROPER, dan biaya lingkungan (environmental cost) diukur dengan alokasi dana program bina lingkungan terhadap profit. Variabel dependen (terikat) adalah kinerja keuangan yang diukur dengan return on asset. Hasilnya menunjukkan bahwa green accounting tidak berpengaruh terhadap kinerja keuangan secara signifikan, sedangkan Environmental Cost berpengaruh negatif terhadap kinerja keuangan.
Analisis Kesalahan Siswa Tipe Kepribadian Thinking dan Feeling dalam Menyelesaikan Soal HOTS berdasarkan Newman’s Error Analysis
Authors: Murtafiah Inni , Susanto  , Suwito Abi
Published: September 2024

This research is a descriptive study which aims to describe the errors made by students in solving HOTS mathematics problems based on Newman's error analysis. This research was conducted at MTs NU Al Badar with research subjects of 1 student with a thinking personality type and 1 student with a feeling personality type. The research instrument used in this research is a test instrument in the form of HOTS type mathematics questions with material on Building a Curved Side Room with 3 questions and an interview guide. The results of the research obtained information that the errors made by students when working on high order thinking skills (HOTS) type mathematics problems with the material Building Curved Side Spaces were divided into four types of error categories, namely errors in understanding the problem (comprehension errors), transformation errors (transformation errors). errors), processing skills errors, and errors in writing answers (encoding errors).
Pelatihan pembuatan sabun dari minyak jelantah pada Kader PKK Desa Merembu
Authors: Subaidah Windah Anugrah , Hajrin Wahida , Pratiwi Eskarani Tri , Ridwan Sucilawaty
Published: September 2024

Indonesian people have a strong preference for food processed using cooking oil. However, the continuous reuse of cooking oil can pose health hazards and have negative environmental impacts if disposed of directly into the soil and waterways. Therefore, innovation is needed to process used cooking oil waste into a product with economic value. Used cooking oil used for cooking can be transformed into soap which is environmentally friendly and has economic value. Hence, this community service aims to reduce the volume of waste cooking oil and improve the local economy. One area in West Nusa Tenggara that has the potential for this product development is the village of Merembu. Out of 2084 families, 727 are still classified as poor. Therefore, there is a need for business opportunities to improve the economy in the village, one of which is by transforming waste cooking oil into soap products. Community service activities in Merembu Village were well received and received positive responses from Empowerment of Family Welfare (PKK) group in Merembu Village. The positive response is reflected in the results of the final evaluation carried out. This activity is a means for PKK group to increase their knowledge of the dangers and methods of processing used cooking oil so that it does not become a pollutant for the environment.
Comparative Characteristics of Electrolyte Solutions Using Electrical Impedance Spectroscopy Method
Authors: Fathia D.S Adinda Fajar Mila , Sugianto Wahyu , Setiana Mira
Published: September 2024

Electrolyte solutions can conduct electric current and help maintain balance in the human body. This study compares the electrical impedance characteristics of various electrolyte solutions using the Electrical Impedance Spectroscopy (EIS) method. Three types of electrolyte solutions were tested: NaCl solution, Ringer’s Lactate (RL) solution, and Simulated Body Fluid (SBF) solution with concentration variations of 20%, 40%, 60%, 80%, and 100%. Measurements were conducted over a frequency range from 1 Hz to 1 MHz to compare electrolyte solutions using a frequency of 10 kHz with an electric current of 50 μA. At a frequency of 10 kHz, a comparison of the three types of electrolyte solutions with concentration variations from 20% to 100% was made. The measurement result showed that the NaCl solution had an impedance value of 200Ω to 900Ω at high frequencies. The Ringer’s Lactate (RL) solution exhibited impedance variations with impedance values ranging from 800Ω to 300Ω, which is more complex due to the other hand, the Simulated Body Fluid (SBF) solution demonstrated impedance stability at high frequencies with impedance values ranging from 400Ω to 200Ω, indicating its electrical properties suitability with human body conditions. Each electrolyte solution has its characteristics in impedance values at a frequency of 10 kHz, which allows for comparing the three types of electrolyte solutions. For further research, additional studies could include impedance characteristics of electrolyte solutions to broaden understanding of their electrical properties, considering variations in frequency and current conditions to optimise impedance characteristic measurements for various electrolyte solutions.
Effect of the Fermentation Time of Purple Sweet Potato (Ipomea Batatas L) Synbiotic Yoghurt with Probiotic Starter on Product Quality and Antioxidant Activity
Authors: Setiawan Azzahra Laili Tivalia Putri , Agustini Rudiana
Published: September 2024

Purple sweet potato (Ipomea batatas L) has the potential as a fermentation medium because it has a high carbohydrate content of around 20.1%. The combination of purple sweet potato extract, skimmed milk, and probiotic starter is expected to be a synbiotic yogurt that can help the digestive system. This study aims to determine the effect of long-term fermentation of purple sweet potato synbiotic yogurt with probiotic starter culture on product quality and antioxidant activity. The observed quality was chemical, microbiological, and organoleptic, with variations in fermentation time of 0, 4, 8, and 12 hours. The study's results showed a long-term effect of the fermentation of purple sweet potato synbiotic yogurt with probiotic starter culture on the quality of yogurt. The variation of 0-hour fermentation time did not meet the pH chemical quality standard with a value of 5.16. Still, it met the TAT chemical quality standard with a value of 0.513%, while the variation of fermentation time of 4-12 hours met the pH quality standard with a value of 3.88-4.33 and a TAT of 1.268-1.967%. In the quality of microbiology, there was a total increase in BAL, which was 46.2×107 - 90.61×107. The best organoleptic quality of color, taste, and aroma was obtained in the 8-hour fermentation variation, while the best texture organoleptic quality was obtained in the 12-hour fermentation variation. The best antioxidant activity was received at 12 hours of fermentation with an IC50 value of 62.727 ppm. From this study, it can be concluded that the best yogurt results are obtained with a fermentation time of 12 hours.
Pot Skirt Configuration on the UB-03 Biomass Stove: Taguchi Approach Optimization
Authors: Rudianto Bayu , Iskhak Maghriza , Rahmanto Dedy Eko , Hijriawan Miftah
Published: September 2024

A biomass stove is a technology that can utilize biomass fuel as an alternative energy source. This stove is considered effective for saving fossil energy because it uses fuels such as wood, waste, and plants so that it can reduce the effects of global warming because it can minimize the emissions it produces. In its technological development, UB-03 is a biomass stove product with compact construction and affordable prices for rural communities. However, there needs to be an increase to produce more efficient performance. In this case, additional configurations in the form of a pot skirt can be used to increase the efficiency of the biomass stove. The pot skirt is a device that focuses the fire’s direction on the load to minimize wasted heat and increase the efficiency of the biomass stove. This study used the Water Boiling Test (WBT) method for experimental testing. In addition, the Taguchi method was used to analyze the data obtained. This study aims to determine the optimum conditions of the biomass stove with the addition of a pot skirt using the Taguchi method with orthogonal array L9 (33) with three factors, namely angle (64°, 65°, 66°), number of holes (9,10,11) and hole diameter (0.8 cm, 1 cm, 1.2 cm). The results of this study indicate that the optimal configuration obtained is by adding a pot skirt at an angle of 65° with 9 holes and a hole diameter of 1 cm, where the highest efficiency value is obtained, namely 21.19%.
Rancang Bangun Sistem Kendali Suhu pada Reaktor Torefaksi Menggunakan Mikrokontroler
Authors: Telaumbanua Mareli , Setiawan Wahyu Hendi , Haryanto Agus , Wisnu Febryan Kusuma , Rahmawati Winda , Lanya Budianto
Published: September 2024

Permintaan energi yang meningkat menyebabkan penurunan ketersediaan bahan bakar fosil. Biomassa dari limbah kelapa sawit yaitu tandan kosong kelapa sawit, dapat digunakan menjadi alternatif bahan bakar. Proses torefaksi mengubah biomassa menjadi biopelet yang ramah lingkungan dan bernilai tambah tinggi. Dalam penelitian ini, kalibrasi dari sensor termocouple tipe K dilakukan dengan Arduino Uno dan pengujian alat torefaksi otomatis pelet dari Tandan Kosong Kelapa Sawit (TKKS). Penelitian ini bertujuan untuk mengembangkan sistem kendali otomatis untuk alat torefaksi pelet. Perancangan alat torefaksi otomatis menggunakan mikrokontroler dengan sumber energi kompor gas. Dimensi dari kerangka penyangga yaitu tabung torefaksi (24 cm x 28 cm), kerangka motor servo (15 cm x 9,5 cm), kerangka penyangga motor DC dan gearbox (26 cm x 6,5 cm). Kotak alat berbentuk persegi (50 cm x 50 cm). Tabung torefaksi memiliki volume 2.826 cm3, diameter 15 cm dan tinggi 16 cm. Hasil penelitian menunjukkan, sistem berhasil mencapai suhu 300°C selama 30 menit dari suhu awal. Pengujian keakuratan suhu menghasilkan rata-rata nilai sebesar 92,12%. Stabilitas pengendalian suhu juga terbukti cukup baik dalam mencapai titik pengaturan yang ditentukan. Kadar air pelet torefaksi pada suhu 150-300°C sekitar 1-2%. Hidrofobisitas pelet hasil torefaksi suhu 250-300°C setelah direndam 24 jam memiliki warna yang lebih bening dan tetap utuh.
EFL TEACHING IN INDONESIA ELEMENTARY SCHOOL: INSIGHTS INTO GENERATION Z
Authors: Chodhori Mutiara , Diastama Imam Musthafa
Published: September 2024

With an emphasis on the needs of students in Generation Z, this study investigates the English instruction methods used at Elementary School in Indonesia. This study examines the materials and approaches utilized to successfully teach English, which is becoming increasingly important in today's globalized society. To further understand instructional strategies and student involvement, the study incorporates observations from classrooms as well as instructor interviews. The study, which was divided into two stages, featured observations of The teacher's class and an interview with her. The need for more participatory teaching techniques, a lack of resources, and constrained learning time are among the major issues that have been noted. The school uses the Cambridge curriculum, but it also takes Indonesia's Merdeka curriculum into account. It suggests incorporating more interactive exercises, such as games, to maintain students' interest. The results emphasize how crucial it is to modify teaching strategies to fit the demands of contemporary students and provide a welcoming environment where English can be learned successfully.
LEARNING THEORY ACCORDING TO HUMANISTIC PSYCHOLOGY AND ITS IMPLEMENTATION IN STUDENTS
Authors: Nabilla Puteri Syafira  , Arbaiyah Yusuf  , Nabila Grresita Aulyana Putri Prayuga  , Nurul Hanifah Putri
Published: September 2024

This research describes learning theory according to Humanistic Psychology and its implementation. Through the application of library research or library research (study) methods, the implementation of this research begins with problem formulation, focus preparation, study and then reading various reference libraries sourced from e-journals and digital books by understanding and studying them seriously until reaching the writing and organizing process. material. The research results show that humanistic learning theory places great emphasis on the importance of the content of a series of learning activities. The aim of learning according to humanistic theory is to make people more humane. Students are expected to be independent, brave, and not constrained by other people's opinions. They are also expected to manage their personality responsibly while adhering to all rules, norms, discipline and ethical standards. Thus, the integration of humanistic psychology into education can help students understand themselves as humans.
THE DEVELOPMENT OF LEARNING KITS BASED ON CAUSALITY MODEL TO IMPROVE CREATIVITY THINKING SKILLS MOMENTUM AND IMPULSE OF STUDENTS
Authors: Faresta Rangga Alif , Warodiah Yudia Nikmatul
Published: September 2024

Teachers still do not fully pay attention to the creative thinking abilities of students. This is seen from the selection of models in the teaching tools used by teachers in teaching. The selection of teaching models that tend to be directed towards direct teaching results in students being less active in following physics learning. Therefore, this research aims to determine the feasibility of a causality model learning device to improve creative thinking skills on the material of momentum and impulse. This type of research includes research and development (R&D), using a 4D model design. However, in this research, only the development stage is carried out. The research procedures carried out refer to the steps of developing the 4D model, namely define, design, and develop. The developed learning device consists of a syllabus, lesson plans, and pre-tasks. Data collection is done through validation of the learning device by validators. The results of the validation of the learning device reached an average validation value of 87.50% with the criteria of very valid and the reliability score is 92.30%. Based on these results, it can be concluded that the causality model learning device to improve the creative thinking skills of momentum and impulse students is suitable to be used in learning.
Profil kadar metabolit sekunder: Steroid, alkaloid, dan tanin ekstrak daun bintangur (Calophyllum soulattri)
Authors: Kurniawan Hadi , Nurbaeti Siti Nani , IH Hariyanto , Nugraha Fajar , Fajriaty Inarah
Published: September 2024

Bintangur leaf is one of the potential plants to be developed into a standardized herbal medicine which has many benefits such as antioxidant, anti-inflammatory and antibacterial. The aim of this study is to determine the steroid, tannin, and alkaloids of bintangur leaf extract. Preparation of bintangur leaves was conducted by soxhletation extraction technique with 96% ethanol as solvent. Determination of tannin tannic acid equivalent, and alkaloid quinine equivalent was analyzed by UV-Vis spectrophotometry method. While the analysis of steroid content β-sitosterol equivalent using a TLC Scanner. The results of the analysis showed that steroid content was 11061,49 µgBSE/g, alkaloid was 307,16 µgQE/g, and tannin was 6,586 %w/w TAE.
PENGARUH TRANSFORMATIONAL LEADERSHIP, WORK ENVIRONMENT, ORGANIZATIONAL CULTURE TERHADAP EMPLOYEE PERFORMANCE DENGAN JOB SATISFACTION SEBAGAI VARIABEL MEDIASI
Authors: Asri Dhita Hafizha Asri , Nova Nova Elisa
Published: September 2024

Rendahnya kinerja karyawan di 5 perusahaan terpilih dengan jumlah KBLI terbanyak di Kota Batam diindikasikan dengan rendahnya pertumbuhan industri pengolahan manufaktur. Penurunan pertumbuhan industri manufaktur disebabkan oleh kinerja karyawan yang semakin menurun. Fenomena tersebut mendorong penelusuran lebih lanjut untuk mengungkap mengapa kinerja karyawan tergolong rendah.  Data penelitian dikumpulkan melalui metode kuantitatif, dengan menggunakan teknik purposive sampling untuk menentukan sampel penelitian. Teknik pengambilan sampel menggunakan Hair et al. (2016) dengan total responden yang mengisi adalah sebanyak 301 dengan jumlah pernyataan kuesioner sebanyak 26. Data penelitian ini dikumpulkan secara primer melalui penyebaran kuesioner online menggunakan Google Form. Data yang terkumpul kemudian diolah menggunakan program SPSS dan SPLS. Hasil yang didapat adalah Transformational Leadership, Organizational Culture, dan Work Environment mempengaruhi Employee Performance, dan Job Satisfaction berpengaruh sebagai variabel mediasi. Implikasinya adalah perusahaan dapat meningkatkan gaya kepemimpinan transformasional, mengembangkan budaya baik dalam perusahaan, dan menciptakan lingkungan kerja yang baik yang dapat mempengaruhi kinerja karyawan dalam perusahaan.
Effect of the Linker and Substituents on the Ionic Conductivity of Borate Single-Ion Polymers for Lithium Batteries
Authors: Vauthier Soline , Cotte Stéphane , Castro Laurent , Guéguen Aurélie , Casado Nerea , Mecerreyes David , Guzmán-Gonzalez Gregorio
Published: September 2024

Polymer electrolytes with high ionic conductivity are actively searched for their application as solid electrolytes in lithium batteries. Here, we show new borate single lithium-ion conducting polymers with high ionic conductivity and lithium transference number values. For this purpose, eight new methacrylic lithium borate polymers were synthesized and characterized with varying chemical compositions focusing on the linker between the polymer chain and the pendant borate ionic group and its substituents. The polymers with the optimum ethoxy linker and fluorinated pendant groups show a low Tg value and the highest ionic conductivity value of 1.29×10-4 S.cm-1 at 60 °C. This value is among the highest ionic conductivity reported for a single lithium-ion conducting homopolymer. These polymers show a high lithium transference number (between 0.88 and 0.96) and electrochemical stability close to 4.2 V vs Li+/Li, making them promising candidates for application as solid electrolytes in lithium batteries.
 
Resumen. Se buscan activamente electrolitos poliméricos con alta conductividad iónica para su aplicación como electrolitos sólidos en baterías de litio. Aquí, mostramos nuevos polímeros conductores de iones de litio de borato simples con valores muy altos de conductividad iónica y número de transferencia de litio. Para ello, se sintetizaron y caracterizaron ocho nuevos polímeros metacrílicos de borato de litio con composiciones químicas variables centradas en el enlazador entre la cadena polimérica y el grupo iónico borato colgante y sus sustituyentes. Los polímeros con el enlazador etoxi óptimo y los grupos colgantes fluorados muestran un valor Tg bajo y un valor superior de conductividad iónica 1,29×10-4 Scm-1 a 60 °C. Este valor es uno de los más altos de conductividad iónica a 60 °C. Este valor es uno de los valores más altos de conductividad iónica a 60 °C. Este valor es uno de los más altos valores de conductividad iónica registrados para un solo homopolímero conductor de iones de litio. Estos polímeros muestran un elevado número de transferencia de litio (entre 0.88 y 0.96), y una estabilidad electroquímica cercana a 4.2 V vs Li+/Li que los convierten en candidatos prometedores para su aplicación como electrolitos sólidos en baterías de litio.
Design and Synthesis of Barbiturates and Hydantoins with Multitarget Antidiabetic Effect☆
Authors: Juárez-Cruz Samantha , Estrada-Soto Samuel , Colin-Lozano Blanca , Marquina-Rodriguez Hugo , Delgado-Aguilar Thalía , Martínez-Conde Carlos , Gutiérrez-Hernández Abraham , Hernández-Núñez Emanuel , Giacoman-Martínez Abraham , Almanza-Pérez Julio Cesar , Navarrete-Vazquez Gabriel
Published: September 2024

☆ Taking in part of the Master in Pharmacy thesis of S. Juárez-Cruz
In current work, we prepared a series of ten 4-aryloxy-5-benzylidenebarbiturates and hydantoins as 1,3-thiazolidine-2,4-dione bioisosteres. An in silico pharmacological consensus analysis (PHACA) was conducted to assess the pharmacokinetic, pharmacodynamics, biopharmaceutical, and toxicological properties of compounds 1-10. The goal was to identify computationally safe hits using a color-coded system resembling a traffic light. The compounds identified as safe computational hits through PHACA were 1, 2, and 4 from the barbiturate series, which were then selected by in vitro assays targeting PPAR-γ, GPR40, and GLUT-4 gene expression. Additionally, these three compounds underwent in vivo evaluation through a glucose tolerance curve assay conducted on normoglycemic mice. Compounds 1 and 4 exhibited antihyperglycemic effects within the first thirty minutes post-administration. Molecular docking studies were conducted to clarify the dual effect and binding mode of compounds 1, 2 and 4 on PPAR-γ and GPR40. Compounds 1 and 4 exhibited robust in vitro and in vivo efficacy and could be considered as multitarget modulators with antidiabetic effect.
 
Resumen. En este trabajo se preparó una serie de diez 4-ariloxi-5-bencilidenobarbituratos e hidantoínas como bioisósteros de la 1,3-tiazolidina-2,4-diona. Se realizó un análisis de consenso farmacológico in silico (PHACA) para evaluar las propiedades farmacocinéticas, farmacodinámicas, biofarmacéuticas y toxicológicas de los compuestos 1-10. El objetivo era identificar hits computacionales seguros utilizando un sistema codificado por colores que se asemeja a un semáforo. Los compuestos identificados como hits computacionales seguros fueron 1, 2 y 4 de la serie de barbituratos, que se eligieron para ensayos in vitro dirigidos a la expresión génica de PPAR-γ, GPR40 y GLUT-4. Además, estos tres compuestos se sometieron a una evaluación in vivo mediante un ensayo de curva de tolerancia a la glucosa realizado en ratones normoglucémicos. Los compuestos 1 y 4 exhibieron efectos antihiperglucémicos dentro de los primeros treinta minutos posteriores a la administración. Se realizaron estudios de acoplamiento molecular para clarificar el efecto dual y el modo de unión de los compuestos 1, 2 y 4 en PPAR-γ y GPR40. Los compuestos 1 y 4 exhibieron una sólida eficacia in vitro e in vivo, por lo que pueden considerarse moduladores polifarmacológicos con efecto antidiabético.
Solar Thermochemistry Overview: An Approach to Solar Thermal Energy Storage and Hydrogen Production
Authors: Santamaria Padilla Adriana , Romero Paredes Rubio Hernando , Macías Juan Daniel , Berrío Sánchez José Miguel , Elizalde Galicia Ana Karina
Published: September 2024

The solar thermochemistry laboratory of the Metropolitan Autonomous University was created in early 1982 to promote the development of solar technology in our country. A decade ago, the priority objective of designing thermal energy storage systems that allow moderating the effects of intermittent solar radiation was proposed. This not only allows us to reduce the consumption of fossil fuels but also contributes to the mitigation of global warming by reducing carbon dioxide emissions. This paper highlights the benefits of research as a driver for advancing solar thermal technology and research efforts to develop heat storage systems. The work includes an overview of current thermal energy storage methods and their future projection. This work reports research developed with mixtures based on strontium carbonate doped with five compounds. The objective was to reduce agglomeration and sintering problems while significantly increasing the effective conversion and energy storage density. The experimental results demonstrate that the SrCO3+CaCO3 and SrCO3+SnO2 mixtures present better performance and stability than others. Finally, this article emphasizes the potential benefits of research, such as advancing solar technology, reducing carbon emissions, providing cleaner energy, and collaborating to address energy poverty.
 
Resumen. El laboratorio de termoquímica solar de la Universidad Autónoma Metropolitana fue creado a principios de 1982 para impulsar el desarrollo de la tecnología solar en nuestro país. Hace una década se propuso como objetivo prioritario diseñar sistemas de almacenamiento de energía térmica que permitan moderar los efectos de la radiación solar intermitente. Esto no sólo nos permite reducir el consumo de combustibles fósiles, sino que también contribuye a la mitigación del calentamiento global al reducir las emisiones de dióxido de carbono. Este artículo aborda los beneficios de la investigación como motor para el avance de la tecnología solar térmica y los esfuerzos de investigación para desarrollar sistemas de almacenamiento de calor. El trabajo incluye una revisión general de los métodos actuales de almacenamiento de energía térmica y su proyección futura. Se reportan las investigaciones desarrolladas con mezclas a base de carbonato de estroncio dopado con cinco compuestos. El objetivo es reducir los problemas de aglomeración y sinterización, al mismo tiempo que aumentar significativamente la conversión efectiva y la densidad de almacenamiento de energía. Los resultados experimentales demuestran que las mezclas SrCO3+CaCO3 y SrCO3+SnO2 presentan mejor rendimiento y estabilidad que otras. Finalmente, este trabajo enfatiza los beneficios potenciales de la investigación, como el avance de la tecnología solar, la reducción de las emisiones de carbono, el suministro de energía más limpia y la colaboración para abordar la pobreza energética.
Air-Stable Triazole-Based Ru(II) Complexes Catalyzed Transfer Hydrogenation of Ketones and Aldehydes Using Ethanol as a Solvent and a Hydrogen Donor
Authors: Vega Sánchez Evelyn , Corona Sánchez Ricardo , Gutiérrez-Carrillo Atilano , Rincón-Guevara Mónica A. , González-Sebastián Lucero
Published: September 2024

The synthesis and characterization of two air-stable ruthenium (II) complexes from readily available triazole-based ligands are described. Both ruthenium complexes, one bearing a bidentate ligand (C-1) and the other a tridentate ligand (C-2), were tested as catalysts in the transfer hydrogenation of ketones and aldehydes using ethanol as a sustainable hydrogen source under aerobic conditions. Notably, the C-2 complex displayed exceptional efficiency under relatively mild conditions, demonstrating a wide substrate tolerance encompassing both alkyl and aryl ketones, as well as aryl aldehydes. Furthermore, our findings highlight the potential of Ru(II) complexes as effective catalysts for the hydrogenation of carbonyl bonds using ethanol, representing a green and sustainable approach without the necessity for an inert gas.
 
Resumen. En este trabajo se describe la síntesis y caracterización de dos complejos de rutenio(II) estables al aire con ligantes basados en triazoles. En general, los triazoles pueden obtenerse fácilmente a través de reacciones simples utilizando reactivos comercialmente disponibles. Ambos complejos de rutenio, uno con un ligante bidentado (C-1) y el otro con un ligando tridentado (C-2), se probaron como catalizadores en reacciones de hidrogenación por transferencia de cetonas y aldehídos, utilizando etanol como fuente sostenible de hidrógeno en condiciones aeróbicas. En particular, el complejo C-2 mostró una eficiencia excepcional en condiciones relativamente suaves, demostrando una amplia tolerancia tanto con cetonas alquílicas como aromáticas, además de hidrogenar eficientemente aldehídos aromáticos. Estos resultados ponen de manifiesto el potencial de los complejos de Ru(II) como catalizadores eficaces para la hidrogenación de enlaces carbonilo utilizando etanol, lo que representa un enfoque ecológico y sostenible sin necesidad de un gas inerte.
Strain-Based Heating of Polymers under Ultrasonic Excitation
Authors:   American Welding Society, MARCUS MIRANDA , SANCAKTAR EROL
Published: September 2024

Ultrasonic welding is the most common type of polymer joining used in industry today. It is critical that the energy transfer and heating mechanisms be well understood to enable the use of this process for more challenging applications. This work seeks to provide new tools to predict the heating rate in a molded polymer part excited by ultrasonic energy. Current assumptions for the mechanics of energy transfer are explored, and new equations for attenuation and strain-based heating are proposed.
Low-grade systemic inflammation in patients with long COVID: The role of imbalance of endotoxin-releasing systems and vasoconstrictor markers
Authors: Beloglazov V. A. , Dudchenko L. Sh. , Useinova R. Kh. , Yatskov I. A. , Solovyova E. A. , Andreeva G. N.
Published: September 2024

Background. Currently, the pathophysiological mechanisms of acute damage to organs and systems caused by coronavirus infection have been studied quite fully, but the mechanisms underlying the clinical manifestations of long COVID have not yet been accurately described. The mechanisms of persistence of a number of symptoms in patients who have had COVID-19 and the role of systemic inflammation and endotoxemia markers in it remain a understudied aspect and a promising direction for further studying.

The aim of the study. To assess the markers of systemic inflammation, endotoxin-releasing systems, intestinal permeability and endothelial dysfunction in patients with long COVID at the stage of health resort treatment.

Methods. The study included 32 patients who had recovered from coronavirus infection and were undergoing health resort treatment in the pulmonology department of the I.M. Sechenov Academic Research Institute for Physical Therapy, Medical Climatology and Rehabilitation. We also selected a control group (n = 20). All patients underwent peripheral blood analysis to detect the levels of markers of systemic inflammation, endotoxin-releasing systems, intestinal permeability, endothelial dysfunction and vasoconstrictor agents: C-reactive protein (CRP), lipopolysaccharide-binding protein (LPB), tissue-type plasminogen activator (tPA), zonulin, bactericidal/ permeability-increasing protein (BPI), vasopressors of angiotensin 2 and endothelin (EDN1).

Results. Patients who had recovered from coronavirus infection had a statistically significant increase in the levels of CRP (3.4 [2.56; 4.0] mg/l), LBP (18.46 [14.0; 25.5] ng/ml), tPA (0.07 [0.02; 0.32] ng/ml), angiotensin 2 (133.3 [63.0; 503.7] pg/ml) and a decrease in the level of BPI (1576 [276; 3588] pg/ml) (p < 0.05).

Conclusion. A statistically significant increase in markers of systemic inflammation, endotoxinemia, and vasoconstrictor agents in patients with long COVID indicates an imbalance in endotoxin-binding and endotoxin-releasing systems in patients who have had coronavirus infection. Further study of the described markers is necessary to improve approaches to long-term personalized therapy for this category of patients.