bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluasi Penggunaan Antibiotik Pada Pasien Rawat Jalan Infeksi Saluran Kemih Di RS Pendidikan Universitas Hasanuddin
Authors: Paluseri Andi , Rosyid Sujud Zainur , Asriani Asriani , Muslimin Lukman , Guntur Muhammad
Published: January 2023

Infeksi saluran kemih (ISK) bawah seperti uretritis, sistisis, epididimis, prostatitis merupakan inflamasi kandung kemih yang paling sering disebabkan oleh infeksi asenden dari uretra. Tujuan penelitian ini yaitu untuk mengetahui pengobatan apa saja yang diberikan pada pasien ISK dan mengetahui kerasionalan penggunaan antibiotik pada pasien ISK. Penelitian ini dilakukan di Rumah Sakit Pendidikan Universitas Hasanuddin (RSP UNHAS) pada tahun 2021 - 2022. Sampel yang digunakan dalam penelitian ini adalah rekam medik pasien ISK rawat jalan. Penilaian kondisi pasien dilakukan dengan membandingkan data pada literatur Drug Information Handbook edisi 24, Guideline Urological Infections 2015 dan modul penggunaan obat rasional Kemenkes RI 2011. Hasil penelitian menunjukkan bahwa pada pasien ISK bawah paling banyak menderita pada pasien perempuan (57,3%) dibandingkan dengan laki-laki (41,3%). Berdasarkan usia ISK bawah tertinggi terjadi pada kelompok umur 23-78 dibandingkan dengan usia  kurang dari 22 tahun. Penggunaan antibiotik rasional sebanyak 70 kasus (92,01%) dan melebihi waktu yang direkomendasikan sebanyak 4 kasus (5,3%). Akan tetapi sebagian besar kasus tidak rasional disebabkan oleh kondisi penyakit pasien yang tidak membaik.
Pengembangan Video Pembelajaran Animasi Gejala Alam Semesta Untuk Anak Usia Dini
Authors: Vidya Vidya Dina Alfiyana , Hendriana Benny , Masykuroh Khusniyati
Published: January 2023

Penelitian ini bertujuan untuk mengembangkan media video pembelajaran animasi gejala alam semesta untuk anak usia dini RA Darussalam Cipayung Jakarta timur guna mengenalkan proses terjadinya gejala-gejala alam semesta yang sering anak temui. Metodologi yang diterapkan menggunakan R&D (Research and Development) dan model pengembangan ADDIE. Hasil pengujian validitas mendapatkan presentase ahli media sebesar 90% mendapatkan katagori sangat valid, presentase ahli materi kepaudan sebesar 88% mendapatkan katagori sangat valid, dan presentase ahli tata bahasa sebesar 79% mendapatkan katagori valid. Hasil uji percobaan terhadap guru RA Darussalam sebesar 91% mendapatkan katagori sangat valid, dan 13 orang tua siswa kelompok B RA Darussalam presentase sebesar 86% mendapatkan katagori sangat valid. Maka kesimpulan yang didapat dari hasil presentase di atas bahwasanya video pembelajaran animasi gejala alam semesta untuk anak usia dini valid dan layak dimanfaatkan sebagai media pembelajaran di RA Darussalam Cipayung Jakarta timur.
Kemampuan Merancang Perangkat Pembelajaran Untuk Pendidikan Anak Usia Dini Pada Peserta PPG Daljab
Authors: Khoiriyah  , Hasanah Musrifatul , Rizki Amalia Navila
Published: January 2023

Tujuan penelitian ini adalah untuk memberikan gambaran luas kemampuan mahasiswa dalam merancang perangkat pembelajaran untuk Pendidikan anak usia dini. Penelitian survey dalam penelitian ini akan menmpilkan data angka-angka yang diperoleh dari penilaian dokumen perangkat pembelajaran. Instrumen penelitian menggunakan instrument penilaian yang telah ditetapkan oleh panitia Nasional Uji Kompetensi Mahasiswa Pendidikan Profesi Guru (PN-UKMPPG) Kementrian Pendidikan dan Kebudayaan. Dalam penelitian ini Analisis data dilakukan melalui tiga tahap. Pertama reduksi data, kedua mendeskripsikan, ketiga adalah membuat kesimpulan. Responden dari peserta PPG Daljab Tahap 3 Kelas A FKIP Universitas Muhammadiyah Jember tahun 2020 yang berjumlah 31 orang. Hasil penelitian menunjukkan adanya peningkatan kemampuan menyusun RPP. Peningkatan dari pra siklus ke siklus 1 dengan skor 1.079 dan dari siklus 1 ke siklus 2 dengan skor 795. Total peningkatan dari pra siklus ke siklus 2 dengan total skor 1.868. Hal ini dipengaruhi oleh cara belajar dan proses belajar, serta interaksi yang memadai antara dosen dan guru pamong pada proses pembelajaran PPG Dalam Jabatan tahun 2020.
Perbandingan Perkembangan Bahasa Anak Ditinjau dari Perspektif Pola Pengasuhan Kebudayaan Sunda dan Kebudayaan Sasak
Authors: Cahyati Nika , Ramdhani Sandy
Published: January 2023

Tujuannya penelitian adalah untuk mengetahui tentang perkembangan bahasa anak pada rentang usia 3-6 tahun yang dilihat dari kebudayaan Sunda dan kebudayaan sasak. Perkembangan Bahasa sangat dipengaruhi oleh proses pola pengasuhan yang ada disetiap keluarga. Terkadang perbedaan kultur atau kebudayaan sangat mempengaruhi perkembangan Bahasa anak. Kajian ini membahas tentang proses perkembangan anak yang dilihat dari perbedaan budaya Indonesia bagian barat yaitu kebudayaan sunda dan kebudayaan timur yaitu sasak. Metode  yang digunakan adalah menggunakan pengamatan dan studi kepustakaan terhadap perkembangan bahasa anak usia 3-6 tahun di Jawa Barat dan Lombok NTB. Hasil dari studi ini adalah bahwa perbandingan antara pola pengasuhan yang berbeda antara kebudayaan Sunda dan sasak memberikan perbedaan dari cara komunikasi, penguasaan bahasa verbal, maupun artikulasi atau cara berbahasa. Sehingga dari studi ini didapatkan gambaran yang luas tentang perbedaan pola pengasuhan dari dua kebudayaan yang berbeda.
Analisis Teknik Webbing untuk Meningkatkan Creative Problem Solving Mahasiswa Pendidik Guru PAUD Menggunakan Kurikulum Merdeka
Authors: Eka Daryati Melia , Suryadi Didik
Published: January 2023

Penelitian ini didasari dari kerangka pembelajaran paradigma kurikulum baru di PAUD yang menuntut pendidik harus lebih kreatif dalam merencanakan dan mengimplementasikan kurikulum merdeka. Kurikulum yang lebih memerdekakan tema pembelajaran kedalam topik kegiatan pengajaran menjadi suatu masalah bila pendidik tidak dapat mengembangkannya. Penelitian bertujuan mengetahui bagaimana proses pembelajaran menggunakan kurikulum merdeka melalui teknik webbing untuk meningkatkan creative problem solving mahasiswa pendidik guru PAUD dalam mengembangkan tema melalui teknik webbing. Penelitian ini menggunakan pendekatan kuantitatif jenis metode deskriptif survei. Hasil penelitian menunjukkan pengembangan tema melalui teknik webbing dengan tahapan memilih topik sebagai tema,  brainstorming tentang tema, mencari literature,  mengembangkan tema besar menjadi tema kecil, menyusun konsep pengetahuan, menentukan puncak tema.
Strategi Penanganan Gangguan Perkembangan Bahasa (Speech Delay) terhadap Komunikasi Interpersonal Anak
Authors: Nursarofah Nisna , Fadya Amanda Putri  , Okalia Oktaviani
Published: January 2023

Tujuan dilakukannya penelitian ini untuk mengetahui strategi yang digunakan untuk menangani gangguan perkembangan bahasa speech delay terhadap komunikasi intrapersonal anak usia dini di TK Cerdik. Subjek yang digunakan dalam penelitian ini yaitu murid di TK Cerdik yang berjumlah 13 siswa. Jenis penelitian ini yaitu deskriptif kualitatif dengan teknik pengumpulan data berupa observasi dan pengamatan. Hasil penelitian menunjukkan bahwa strategi penanganan gangguan perkembangan bahasa speech delay terhadap komunikasi intrapersonal anak usia dini di TK Cerdik diantaranya dapat dilakukan dengan tindakan mengajak anak berbicara secara perlahan, menggunakan bahasa yang benar dan tepat serta dilakukan secara berulang, ketika anak sedang melakukan proses bicara, sebaiknya guru memperhatikan dan mengamati setiap kata maupun kalimat yang diucapkan oleh anak., mengontrol serta membenarkan kalimat yang pengucapannya mengalami kekeliruan atau kesalahan. serta, menyiapkan metode atau pembelajaran yang sekiranya dapat melatih dan memperlancar komunikasi interpersonal anak supaya anak lebih percaya diri saat melakukan proses komunikasi dan interaksi.
Peran Orang Tua Terhadap Proses Belajar Moral Anak Usia Dini
Authors: Haerudin Dodi Ahmad
Published: January 2023

Tujuan penelitian ini adalah untuk melihat bagaimana peran orang tua dalam meningkatkan perkembangan moral anak. Pengawasan orang tua dalam proses belajar anak itu sangat penting, menjadi orang tua yang ideal bagi anaknya yaitu dengan cara memberikan komunikasi yang baik kepada anaknya. Komunikasi yang baik seperti memberikan kesempatan kepada anak untuk berbicara, bertanya, dan menghargai pendapat anak. Peneliti menggunakan penelitian korelasional yang bertujuan untuk mengungkapkan hubungan korelatif antar variabel. Hubungan korelatif mengacu pada kecenderungan hubungan variabel satu dengan variabel yang lainnya. Hasil dari pembahasan ditemukan bahwa sekolah online dapat membawa kendala dan dampak yang signifikan bagi anak sebagai peserta didik maupun guru sebagai tenaga pengajar dan peran orang tua. Orang tua harus lebih mampu meningkatkan pengawasan dan mendidik anak dengan baik apalagi di masa pandemi agar anak- anak mereka menjadi anak yang berkualitas dan mengharumkan nama Indonesia serta menumbuhkan motivasi dalam belajar.
Perbedaan Pemerolehan Bahasa Sintaksis pada Anak Kembar Usia 2 Tahun
Authors: Juanda Juanda , Arlin Arlin
Published: January 2023

Pemerolehan bahasa pada anak kembar berbeda jenis kelamin merupakan hal yang menarik untuk dikaji. Penelitian ini bertujuan untuk mengetahui perbedaan pemerolehan bahasa pada sepasang anak kembar pada tataran sintaksis di usia 2 tahun 7 bulan – 2 tahun 11 bulan. Subjek penelitian adalah sepasang anak kembar, ZA berjenis kelamin laki-laki, dan ZU berjenis kelamin perempuan. Penelitian ini menggunakan metode kualitatif deskriptif. Hasil penelitian menunjukkan bahwa ZA yang berjenis kelamin laki-laki pada tataran sintaksis mampu memproduksi kalimat dua kata, hingga tiga kata atau lebih, baik itu bentuk deklaratif maupun imperatif sederhana. Demikian juga pada ZU yang berjenis kelamin perempuan, pada tataran sintaksis mampu memproduksi kalimat dua kata hingga tiga kata atau lebih dalam bentuk deklaratif, dan imperatif sederhana, hingga kalimat kompleks. Sementara itu perbandingan pemerolehan bahasa ZA dan ZU dari segi sintaksis berupa kalimat dua kata hingga tiga kata atau lebih, ZU jauh lebih produktif dibandingkan dengan ZA. Di umur yang sama, ZU mampu membuat kalimat yang lebih kompleks tanpa harus menunggu stimulus dari orang di sekitarnya. Penelitian ini bisa menjadi data baru bagi akademisi yang berkecimpung pada bidang pemerolehan bahasa, terutama terkait perbedaan pada anak laki-laki dengan anak perempuan.
Pemerolehan Sintaksis Anak Usia 7 Tahun 4 Bulan di Benteng Kepulauan Selayar
Authors: Pratiwi Arsaf Nur , Juanda Juanda
Published: January 2023

Pemerolehan bahasa merupakan sebuah proses yang dilalui anak-anak sebagai upaya dalam memperoleh bahasa pertama. Tujuan penelitian ini adalah mengetahui pemerolehan bahasa terhadap anak dalam bidang sintaksis khususnya mengenai jenis-jenis kalimat yang sering diucapkan oleh anak. Data penelitian ini adalah kalimat yang dituturkan oleh subjek penelitian yaitu seorang anak perempuan kelas 1 SD berusia 7 tahun 4 bulan berinisial DA. Metode penelitian ini adalah deskriptif kualitatif. Instrumen penelitian ini adalah gawai milik Ibu DA yang digunakan untuk merekam ujaran anaknya. Pengumpulan data dilakukan dengan teknik simak bebas, libat, cakap, rekam yang dibantu oleh ibu DA, dan catat yang dilakukan oleh peneliti. Urutan dalam menganalisis data yaitu: (1) pengumpulan data (2) mereduksi data yang terdiri dari proses transkripsi data, mengidentifikasi, mengklasifikasi, dan pemaknaan (3) menyajikan data yang sudah diklasifikasi berdasarkan jenis kalimat ke dalam tabel dan (4) Tahap akhir yaitu penarikan kesimpulan. Penelitian ini menunjukkan bahwa DA telah mampu membuat kalimat deklaratif, imperatif, dan interogatif. Kesimpulan dari hasil penelitian yakni jenis kalimat yang dituturkan oleh anak bergantung pada situasi dan kondisi, pada kasus ini subjek lebih banyak mengucapkan kalimat deklaratif. Bagi peneliti selanjutnya, penelitian ini dapat menjadi referensi untuk meneliti pemerolehan sintaksis khususnya jenis kalimat yang sering digunakan oleh anak usia 7 tahun 4 bulan.
EXPLORING FACTORS THAT AFFECT UNDERGRADUATE STUDENTS' MOTIVATION TO LEARN CHEMISTRY AND PHYSICS
Authors: Salta Katerina , Koulougliotis Dionysios
Published: January 2023

The pivotal role of motivation in fostering science learning has long been recognized and it is a field of active research worldwide. This research aimed at examining the effect of three different factors (used as independent variables) on shaping the motivation of undergraduate students for chemistry and physics learning via multiple regression analysis. Motivation (dependent variable) was measured via the use of the chemistry and physics-specific versions of Science Motivation Questionnaire II (SMQ II). The participants were 281 full-time undergraduate students in three different academic departments of a Greek tertiary education institution. Students’ gender was shown to exert an effect of small size on their motivation for chemistry and physics learning, while a larger, however mostly small effect, was observed with regard to the students’ academic major. Students’ academic experience from the attendance of physics and chemistry courses was measured via an instrument which was developed specifically for this research, and it was shown to be the most influential factor affecting their respective learning motivations. In addition, strong evidence was provided that the academic experiences acquired during tertiary education have a significantly more intense effect in configuring students’ motivation to learn either chemistry or physics relative to the ones obtained in the immediate past referring to the previous educational grade (secondary education).
Keywords: academic major, gender effect, quantitative research, science learning, students’ experiences
THE OPINIONS AND NEEDS OF SCIENCE CENTER INSTRUCTORS: THE CASE OF GOKMEN SPACE AND AVIATION TRAINING CENTER (GUHEM)
Authors: Aslan Ayşegül
Published: January 2023

This study aimed to examine the opinions of the instructors who work at GUHEM (Gökmen Space and Aviation Training Center) on the exhibition's content, how the exhibition spaces contribute to science education, especially astronomy and aviation, and the types of visitors who frequently visit the center. Nine instructors from GUHEM's science centers participated in the study. Data were gathered using the "Instructor Opinion Form," with nine open-ended questions. The data elicited from these questions were subjected to content analysis. The findings showed that children aged 6 to 11 made up the majority of visitors; the fascinating exhibition areas focused on the Solar System and planets and interactive workshops with space and aviation themes, like those involving paper airplane construction and rocket competition, were very popular. In terms of the contribution of this center to science education, it was found that the GUHEM exhibitions played an active role in teaching the solar system, planets, and pressure. Although astronomy is the discipline with which the exhibition areas are most closely associated, it can also be linked to other disciplines like astrobiology, mathematics, and aviation. Instructors shared their worries that they won't be able to meet visitors' expectations and occasionally struggle to understand the subject during activities held at GUHEM. These findings led to the opinion that GUHEM and other science centers will function more effectively if schools and science centers collaborate more, the curriculum and exhibition content are improved, and the instructors receive professional assistance from academicians who are subject-matter experts.
Keywords: astronomy and aviation, instructor, needs, opinion, science center
Reflexiones en torno a la calidad de la atención en salud
Authors: Szulik Dalia
Published: January 2023

El presente artículo presenta un recorrido conceptual sobre la calidad de la atención en salud. El mismo propone diferentes alternativas a la visión tradicional sobre este concepto que hace foco en una mirada administrativa y gerencial. Se destaca la complejidad y multidimensionalidad de la calidad de la atención, al tiempo que se analizan diversos enfoques que permiten avanzar en una reflexión sociológica con el objetivo de superar la perspectiva gerencial y eficientista dominante. Esto implica revisar cuestiones que hacen a la posibilidad de ejercicio de los derechos, su apropiación, su promoción, omisión o vulneración desde los espacios institucionales, y ampliar el escenario de análisis, desde el marco de la ciudadanía. Así, la ecuación final da cuenta de la interdependencia de tres elementos que se potencian y resultan ser condicionantes entre sí: ciudadanía, salud y atención de calidad.
¿Se ha intentado alguna vez la planificación a largo plazo? El caso de las telecomunicaciones satelitales en Argentina
Authors: Seijo Gustavo
Published: January 2023

Este artículo analiza el proceso de emergencia de los satélites ARSAT-1 y 2 abordando i) su proceso de planeamiento, ii) la posterior construcción, y iii) la venta de servicios de telecomunicaciones satelitales que proviene de estos desarrollos tecnológicos. Del proceso de planeamiento son analizadas en este foro, tanto la prosa del Plan Satelital Geoestacionario Argentino, como su proceso de implementación inconcluso. Asimismo, son abordados los vínculos estrechos que existieron entre la dinámica política argentina y la relevancia relativa de esta iniciativa en la agenda argentina de gobierno. Controversias y discrepancias entre los actores vinculados al desarrollo de una muy incipiente industria satelital argentina permiten, por un lado, explicar dicha interrupción de trayectoria y, por otro, estimar qué tipo de esfuerzo (en términos de coordinación de acciones venidera) será necesario para poder volver a planificar proyectos satelitales de telecomunicaciones. Este trabajo se propuso estudiar la dinámica política relacionada con esta embrionaria industria satelital argentina vis-à-vis sus desarrollos tecnológicos y prácticas de gestión para la comercialización de servicios de telecomunicaciones.
Quality of ram semen in relation to scrotal size
Authors: Sharmin S , Islam MM , Saha A , Akter S , Juyena NS , Bari FY
Published: January 2023

Aim of this study was to select superior rams by assessing their scrotal size and quality of semen. In ten indigenous Bangladeshi rams, the body weight, scrotal circumference, and scrotal volume of rams increased with age (P<0.05). Body weight at 381-410 days (13.6 ± 1.5 kg) was higher than at 169-200 days (10.2 ± 0.1 kg) and 201-230 days (10.4 ± 1.2 kg) (p<0.05). Scrotal circumference at 381 - 410 days (19.1 ± 0.3 cm) was higher (p<0.05) than at 169 - 200 days (17.2 ± 0.1 cm), 201 - 230 days (17.2 ± 0.6 cm), and 231 - 260 days (17.2 ± 0.5 cm). At 381 - 410 days, scrotal volume (87.4 ± 5.5 cm3) was higher than in the five youngest groups (p<0.05). Both scrotal circumference and volume were positively correlated (R2=0.519) with the increased body weight. Semen volume increased with age, which varied from 0.4 ± 0.0 - 1.2 ± 0.3 ml. The semen volume at 381 - 410 days (1.2 ± 0.3 ml) was higher than other age groups (P<0.05) except for 351 - 380 days. The mass activity of sperms of different age groups varied from 2.8 ± 0.4 to 4.3 ± 0.3. Sperm concentration, progressive motility (%), and normal spermatozoa (%) improved progressively with age, but significant changes in these parameters were seen when the animals reached 291 days or more (P<0.05). However, normal spermatozoa (%) improved from the age of 261 days. The mass activity was positively correlated with sperm concentration (R2 = 0.568) and with progressive motility (%) (R2 = 0.616). Measurements of scrotum could provide a reliable guide in estimating sperm production capacity, which are important for breeding soundness evaluation, and genetic improvement of indigenous rams.

Bangl. vet. 2021. Vol. 38, No. 1-2, 1–9
Factors affecting calving to service interval in crossbred Friesian cows in a large dairy farm
Authors: Hossain MS , Rahman MA , Bari FY , Bhuiyan MMU
Published: January 2023

To determine the calving to service interval and its associated factors, 125 crossbred Friesian cows were studied. The farm records were randomly examined, and related data were collected on genotype, age, body weight, body condition score (BCS), parity, milk yield, suckling status and season of first postpartum service. The overall calving to service interval in Friesian crossbred cows was 98.9 ± 42.6 days. Calving to service intervals in cows with 50.0%, 62.5 - 68.8% and 75.0 - 87.5% exotic blood were 98.7 ± 41.6, 102.9 ± 58.3 and 94.7 ± 33.6 days, respectively. The calving to service interval in cows aged 42 - 60, 61 - 78 and 79 - 173 months was 74.0 ± 14.4, 108.5 ± 48.9 and 100.8 ± 43.0 days, respectively. The calving to service interval in cows with body weight 140 - 180, 181 - 220 and 221 - 250 Kg was 94.3 ± 38.4, 99.3 ± 41.4 and 134.2 ± 74.9 days, respectively. The calving to service interval in cows with BCS 2.5 - 3.0 and 3.5 - 4.0 was 98.8 ± 42.3 and 99.1 ± 44.3 days, respectively. The calving to service interval in cows with parity 1, 2 - 3 and 4 - 10 was 117.5 ± 76.4, 99.6 ± 40.0 and 96.4 ± 41.2 days, respectively. The calving to service interval in cows with milk yield 0 (dry), 1 - 5, 6 - 10 and 11 - 16 litres was 118.4 ± 51.2, 99.6 ± 45.6, 102.5 ± 45.8 and 84.0 ± 22.1 days, respectively. The calving to service interval in suckling and nonsuckling cows was 100.5 ± 44.3 and 88.8 ± 28.8 days, respectively. The calving to service interval in cows in summer, rainy and winter season was 98.8 ± 41.4, 104.5 ± 46.9 and 95.3 ± 41.9 days, respectively. The difference in calving to service interval among cows of different ages was significant (P<0.05). It is suggested that calving to service interval was not influenced by breed, body weight, BCS, parity, milk yield, suckling status or season of service.

Bangl. vet. 2021. Vol. 38, No. 1-2, 33–41
URUVAKA AṆI: ARAPU MAṞṞUM TAMIḺ MOḺIKAḶUKKIṬAIYILĀṈA ŌR OPPĪṬṬU ĀYVU [THE ART OF METAPHOR: A CONTRASTIVE STUDY BETWEEN ARABIC AND TAMIL]
Authors: MOHAMMED HAFEES MOHAMMED SHAREEF , MOHAMED MAHSOOM ABBUL RAUFF
Published: January 2023

Metaphor is regarded as one of the most important tools in the literature of any language because it stimulates the imagination for the analysis of literary works. In Arabic rhetoric, this literary device is known as ʾIstiʿārah, and in Tamil grammar, it is defined as Uruwaha Ani. This study compares the background, definition, and classification of this concept in both languages. This study discovered that the two discourses have different backgrounds, in that ʾIstiʿārah in Arabic is based on the concept of Majāz (Allegory) and Uruwaha Ani in Tamil is seen as the developmental stage of simile. According to the definition of ʾIstiʿārah, it requires only the linked to (the borrowed to - المستعار له) or the linked (the borrowed-from - المستعار منه) to be mentioned in the given examples. Thus, in Tamil Uruwaha Ani, when only the linked to (Uwameyam) or the linked (Uwamanam) is mentioned, it coincides with the ʾIstiʿārah discourse. The study also discovered that Uruwaha Ani differs from ʾIstiʿārah, in the way it handles phrases that contain both linked to and the linked, while the Arabic rhetoric considers it as a type of smile called ‘effective simile’ (التشبيه البليغ). Although both ideologies have different classifications, some classifications of each can be found in the illustrative examples of the other language.
Studi Fluida Kerja pada Pemanfaatan Panasbumi Temperatur Rendah di Pulau Ambon dengan Siklus Biner
Authors: Hajianto Muhamad Roni
Published: January 2023

Studi ini membahas peluang pemanfaatan panasbumi temperatur rendah keluaran wellpad di Pulau Ambon sebagai pembangkit listrik tenaga panasbumi baru menggunakan siklus biner. Analisis termodinamika dilakukan dengan variasi 5 jenis fluida kerja, yaitu Isopentane, N-pentane, R245fa, Isobutane dan N-butane. Fluida kerja N-butane menghasilkan daya turbin bersih terbesar, yaitu 1,287 MW dan efisiensi termal sebesar 10,911 %. Fluida kerja isobutane menghasilkan daya bersih sebesar 1,259 MW dan efisiensi termal 10,093 %. Fluida kerja R245fa menghasilkan daya bersih sebesar 1,231 MW dan efisiensi termal 10,674 %. Fluida kerja N-pentane menghasilkan daya bersih sebesar 1,231 MW dan efisiensi termal 10,186 %. Fluida kerja Isopentane menghasilkan daya bersih sebesar 1,188 MW dan efisiensi termal 10,589 %.Analisis ekonomi dilakukan pada siklus biner ini untuk mendapatkan harga purchase equipment cost (PEC) dan menentukan biaya pembangunan instalasi pembangkit. Fluida kerja N-butane menghasilkan harga terendah pada biaya pembangunan pembangkit sebesar 2.150 USD/kW. Pertimbangan terakhir adalah dampak lingkungan dan keamanan fluida kerja. Fluida kerja N-butane penurunan emisi CO2 sebesar 6.608,98 ton/tahun. Fluida N-butane termasuk memiliki safety group A3, 0 (nol) ODP dan 0 (nol) GWP.Katakunci: Biaya pembangkitan, emisi Co2, siklus biner, temperatur rendah
Analisis Petrografi dan Geokimia Batuan Diorit-Granodiorit-Granit di Daerah Gorontalo, Sulawesi
Authors: Permanadewi Sam , Samodra Hanang
Published: January 2023

Petrografi dan geokimia batuan granitoid didekati dari aspek petrografi dan whole-rock X-ray fluorescence (XRF) serta pemodelan data geokimia unsur utama menggunakan perangkat lunak GCDkit berbasis bahasa pemrograman R. Kelompok batuan Gorontalo diorit-granodiorit-granit (DGG) merupakan kelompok batuan beku plutonik bersifat menengah-asam yang dapat dibedakan jenisnya berdasarkan persentase kehadiran mineral kuarsa, alkali feldspar dan plagioklas serta komposisi geokimia. Secara fisik, batuan tersebut menunjukkan struktur masif, tekstur holokristalin dengan bentuk kristal umumnya euhedral-subhedral dengan ukuran kristal fanerik sedang hingga sangat kasar. Analisis pada batuan Gorontalo DGG menunjukkan kecenderungan sifat magnesian dengan indeks saturasi aluminium seluruhnya adalah metalominous dan memilik seri magma dengan tipe kalk-alkalin yang berasosiasi dengan lingkungan subduksi dengan perkiraan kedalaman peleburan sebagian magma terjadi pada kedalaman antara 114 hingga 160 km. Material batuan yang mengalami peleburan berasal dari dua jenis yang berbeda, yaitu low dan high-K mafic rocks. Selanjutnya, proses diferensiasi magma Gorontalo DGG setidaknya mengalami proses magma mixing, gravitational settling mineral, dan fraksionasi.Katakunci: DGG, geokimia, Gorontalo, petrografi.
Vatandaşlıktan Yoksun Bırakmada Gözetilmesi Gereken İlkeler: İnsan Hakları Açısından Bir Değerlendirme
Authors: YAZAR Ertuğrul
Published: January 2023

Bu çalışmada, ortaya çıkardığı hukuki, fiili ve sosyolojik sonuçları ortaya konularak vatandaşlıktan yoksun bırakmanın ne denli tehlikeli bir yasal araç olduğu savunulmaktadır. Devletler kendi egemenlik alanları çerçevesinde, vatandaşlık hakkının kazanılması ve sona erdirilmesi gibi konularda belirli bir takdir marjına sahiptir. Ancak bu uygulama alanı, uluslararası insan hakları metinlerinin emredici hükümlerinin yanı sıra, bireyle devlet arasında kurulacak hukuki ve siyasi ilişkinin başka devletleri ve uluslararası toplumu ilgilendirmesi nedeniyle daralmaktadır. Çalışma, vatansızlığın getirdiği olumsuz sonuçların önlenmesi ve vatansızlıkla daha etkin mücadele edilmesi için devletlerin takdir marjını daraltıcı nitelikteki insan hakları ilkelerini tespit etmeyi amaçlamaktadır. Yasallık ilkesi, keyfiliğin önlenmesi, ayrımcılık yasağı ve eşitlik ilkesi, son çare olarak başvurma, yargı yolunun açık tutulması gibi insan hakları ilkeleri; Avrupa İnsan Hakları Mahkemesi, Avrupa Birliği Adalet Divanı ve Anayasa Mahkemesi kararları ile uluslararası kuruluşların yayınları ve bilimsel görüşler çerçevesinde anlaşılır kılınmaya çalışılmaktadır. Uluslararası insan hakları hukuku ve sosyal bilimler alanı çalışanlarının görüşlerini harmanlayarak vatansızlık konusuna odaklanan çalışma, bu yönüyle özgün bir nitelik taşımaktadır.
Examination of Soil Analysis Applications and Soil Analysis Subsidies in terms of Producers in Edirne and Tekirdağ Provinces
Authors: AYDIN Başak , ÖZKAN Erol , KAYALI Emel , ATAV Volkan , GÜRBÜZ Mehmet Ali , KURŞUN İlker , KAYHAN İhsan Engin
Published: January 2023

The aim of this study was to determine the differences and the importance of the differences in terms of some socio-economic factors and agricultural practices of the producers who had soil analysis in Edirne and Tekirdağ provinces and to evaluate the opinions of the producers about soil analysis and soil analysis subsidies. Three laboratories were selected among the laboratories with the highest number of sample acceptances for soil analysis in the provinces determined in the study. For each province, total of 60 producers who applied to the laboratories in 2015 and who utilized from soil analysis subsidies, and consequently, total of 120 producers were interviewed. The analysis of the differences of the producers who had soil analysis in Edirne and Tekirdağ provinces was determined by the regression tree model (CHAID analysis). According to the CHAID analysis, in which the provinces were taken as the dependent variable, it was seen that the first most distinctive feature was the state-supported agricultural insurance. Of the producers who stated that they did not have agricultural insurance, 31% were located in Edirne and 69% were located in Tekirdağ. It was seen that 56% of the producers in Edirne and 44% of the producers in Tekirdağ had agricultural insurance. The most important feature of the second node was the education level of the producers, the third sub-node decision point was whether the producers had training on fertilization, and the fourth decision point was whether the producers faced risks in agriculture in the last three years. The four most important reasons for the producers to have soil analysis in Edirne province were to increase the product yield, to reduce the cost, to increase product quality and protect the environment, respectively. In the province of Tekirdağ, the criteria of increasing the product yield was on the first rank, increasing the product quality in the second rank, reducing the cost in the third rank and protecting the environment in the fourth rank. It is expected that it will be beneficial to introduce soil analysis conditions to the producers at the stage of purchasing fertilizers, and thus to ensure that the producer purchases fertilizer by determining the type and amount of fertilizer to be disposed of according to the analysis results.
Optimization of Drying Conditions of Kiwi Rings with Osmo-solar Dehydration
Authors: YILDIZ Zehra , GENCER Furkan Sabri
Published: January 2023

It is the oldest and most common traditional food preservation method known to dry by laying food products under the sun. However, if the food product is in direct contact with the sun light, there is a decrease in the color and nutrient values of the product. To solve these problems, solar dryers have been developed which can be utilized due to indirectly the effect of the sun. In this study, kiwi rings were dried by using osmosolar dehydration as a combination of osmotic dehydration and solar drying. Kiwi rings were first immersed in sucrose solutions and then dried in a solar dryer. Response Surface Methodology used to determine effects of the conditions ondrying performance and find out optimum levels drying conditions for the responses to a safe level. In the response surface method, the drying conditions were selected as the kiwi slice thickness (A), sucrose concentrations (B), immersed time (C) and solar drying time (D). The response to be optimized was chosen as water loss, diameter shrinkage ratio and greenness (a) color change. A successful mathematical model was obtained by the response surface method between the drying conditions and the responses. The suitable model is chosen quadratic for water loss, 2FI model for color change model and shrinkage ratio. The model R2 value is 0.952 for water loss, 0.737 for a color change and 0.856 for shrinkage ratio. The regression coefficients, along with the corresponding P-values, for the model of production water loss, a color change and shrinkage ratio are described by ANOVA. Values of "Prob>F" less than 0.0500 indicate model terms are significant. In this case B, C, C2 are significant model terms for water loss. A, B, C, AB, AC, AD, BC and CD are significant model terms for color change and B, C, AC, AD, BD, CD are significant model terms for shrinkage ratio. The optimum drying conditions levels was determined to sucrose concentration 12.7 %w/v, ring slice thickness 4.06 mm, solar drying time 125 min and immersed time 70.9 min, respectively. In addition, pretreatment of osmotic dehydration was found to be effective in drying kiwi rings with solar tray dryer.
Geleneksel ve Analize Dayalı Kimyevi Gübre Uygulamasının Mısır Verimi ve Yaprakta Bitki Besin Elementleri İçeriğine Etkisi
Authors: ÖNER Nureddin , ÖNER Filiz
Published: January 2023

Bu araştırma; 2016 yılında Muğla Dalaman Tarım İşletmesi Müdürlüğü (TİGEM) 72MAY80 tanelik ve silajlık mısır çeşidinde, deneme sahasında tesadüf blokları deneme desenine göre üç tekrarlamalı olarak yürütülmüştür. 950 kg da-1 mısır verimi için gerekli olan bitki besin elementleri miktarından toprak analiziyle belirlenen elementler çıkarıldıktan sonra uygulanacak gübre miktarı belirlenmiştir (41,5 kg da-1 üre). 950 kg da-1 mısır verimi için gerekli olan gübre uygulamasının %40 azaltılması (24,95 kg da -1 üre) ve %40 arttırılması (58.1 kg da -1 üre) ile üretici uygulaması (60 kg da -1 üre, 32,3 kg da -1, 15-15-15 ve 14 kg da -1 KNO3) olmak üzere dört farklı oranda gübre uygulamasının mısır bitkisinin verimine ve yapraktaki azot (N), fosfor (P), potasyum (K), kalsiyum (Ca), magnezyum (Mg), kükürt (S), demir (Fe), bakır (Cu), çinko (Zn), mangan (Mn), bor (B) ve molibden (Mo) elementleri içeriğine etkisini belirlemek amacıyla yapılmıştır. Toprağa tabandan uygulanan üre, 15-15-15, gübreleri ekim mibzeri ile birlikte banda verilmiştir. Deneme parsellerinde üst gübre olarak kullanılan üre ve KNO3 gübresi damlama sulama sistemiyle üç farklı zamanda uygulanmıştır. Araştırma sonuçlarına göre toprağa 950 kg da-1 mısır verimine göre gübre uygulaması, gübre uygulamasının %40 azaltılması ve %40 arttırılması ile üretici uygulamasının mısır verimi ve yapraktaki azot (N), fosfor (P), potasyum (K), kalsiyum (Ca), magnezyum (Mg), kükürt (S), demir (Fe), bakır (Cu), çinko (Zn), mangan (Mn), bor (B) ve molibden (Mo) elementleri konsantrasyonuna etkisi istatistiki olarak önemli bulunmuştur (p
Çukurova Koşullarında Yetiştirilen Tatlı Sorgum Genotiplerinin Selülozik Biyoetanol Veriminin Belirlenmesi
Authors: AKSOY Mine , ÇELİK Ayşegül , DOK Mahmut , YÜCEL Celal , AYDIN Kadir
Published: January 2023

Tatlı sorgum bitkisi ve özsuyu alındıktan sonra geriye kalan posası birinci nesil biyoetanol, hayvan yemi, gübre, biyoyakıt ve selülozik biyoetanol üretimi gibi çeşitli amaçlar için değerlendirilmektedir ve geniş kullanım alanlarından dolayı gün geçtikçe önem kazanmaktadır. Bu çalışmada, farklı tatlı sorgum genotiplerinin özsuyu alındıktan sonra geriye kalan saplarında (posasında) teorik selülozik biyoetanol potansiyelinin belirlenmesi amaçlanmıştır. Bu amaçla yurt içi ve yurt dışındaki değişik kaynaklardan temin edilen 21 farklı tatlı sorgum (Sorghum bicolor var. saccharatum (L.) Mohlenbr.) genotipi materyal olarak kullanılmıştır. Tarla denemeleri, Çukurova (Adana) ikinci ürün koşullarında 2016 ve 2017 yıllarında yürütülmüştür. Bitkilerin hasadı, salkımdaki tanelerin süt-hamur olum dönemine denk gelen tarihlerde yapılmıştır. Hasat edilen bitkilerin yaprakları ve salkımları ayrıldıktan sonra saplar ekstrakte edilip özsuyu alınmıştır. Özsuyu alınan saplar (posalar) kurutulduktan sonra selüloz ve hemiselüloz analizleri yapılmış ve teorik selülozik biyoetanol verimleri kuru madde bazında L ton-1 ve L da-1 cinsinden hesaplanmıştır. Çalışma sonucunda iki yıllık ortalamalara göre; tatlı sorgum genotiplerinin selüloz içeriğinin %33.21-45.13, hemiselüloz içeriğinin %20.63-25.36, teorik selülozik biyoetanol veriminin ise 183.7-231.0 L ton-1 kuru madde (KM) ve 297.4-767.6 L da-1 (KM) arasında değiştiği saptanmıştır. Araştırmada özsuyu alındıktan sonra kalan posanın selülozik biyoetanol üretimi amacıyla kullanılabileceği ve Grass1, Tracy, UNL-Hyb-3 ve No91 genotiplerinin birim alanda 600 L da-1 üzerinde selülozik biyoetanol üretme kapasitesi ile öne çıkan genotipler oldukları görülmektedir. Tatlı sorgum bitkisinin özsuyundan biyoetanol elde edilmesi ve ayrıca geriye kalan küspesinden de selülozik biyoetanol üretilmesi ile yüksek biyokütle potansiyeline sahip bitkinin tamamından yararlanılarak daha fazla biyoetanol elde edilebileceği ve böylece yenilenebilir enerji kaynağı olarak sürdürülebilirlik, çevre ve ekonomi gibi çeşitli açılardan avantajlar sağlanabileceği sonucuna ulaşılmaktadır.
Effect of Cutting Treatment on Seed Yield and Seed Quality of Dill
Authors: ALAN Özlem , İLBİ Hülya
Published: January 2023

Dill, Anethum graveolens L., is grown in various regions of the world. It has been used as vegetable and medicinal plant since ancient times. Seed quality is important in dill cultivation and there is limited information on the effects of cutting treatment in this species. This research was carried out to find out the effect of cutting treatment on phenological traits, seed yield and quality of dill at Ege University, Izmir, during 2016-2018. The experiments were carried out in the randomized complete block design with three replications, comprising of cutting treatment for both spring and autumn seeding period. Significant differences were noted in the flowering period, seed yield and quality attributes with cutting treatment for both seeding period. The obtained results showed that the days from sowing to bolting initiation were increased with cutting treatment from 51 days to 65 days in spring seeding period and from 153 days to 184 days in autumn seeding period. The plant height, number of umbels per plant, seed weight per plant were lower in the cut plants in comparison to that of uncut plants for both seeding period. The uncut plants has produced significantly higher plant height (113 cm-spring seeding period; 133 cm-autumn seeding period), number of umbels/plant (8.4-spring seeding period; 10.1-autumn seeding period) and seed weight/plant (6.4 g-spring seeding period; 10.9 g-autumn seeding period). The cutting treatment decreased germination percentage by 9.27% in the spring seeding period and by 12.13% in the autumn seeding period compared to the control plant seeds. Lower mean germination time at 20/30°C (3.77 days-spring seeding period; 4.54 days-autumn seeding period) were also observed in uncut plants. Thus, it was concluded that cutting is not recommended in the vegetative stage in dill seed production as it provided lower seed yield and seed quality for both autumn and spring seed planting periods.
Evaluation of NASA POWER Climatic Data against Ground-Based Observations in The Mediterranean and Continental Regions of Turkey
Authors: HALİMİ Abdul Hasib , KARACA Cihan , BÜYÜKTAŞ Dursun
Published: January 2023

The weather reanalysis datasets are very advantageous data types worldwide that fill the gaps of missed measuring data and are alternatives that compensate for the scarcity of observed climate data. The main purpose of this study was to evaluate the effect of horizontal distance, altitude, and climatic regions compared to sea level on NASA POWER reanalysis data for daily temperature variables, relative humidity, and wind speed observed in meteorology stations in the Mediterranean and Continental regions of Turkey. For this purpose, three different meteorology stations (Antalya airport, Elmalı, Teffenni) from the Mediterranean region with different distances and elevations compared to sea level and one station (Ankara) far from the Mediterranean region with continental climate were selected. The statistical approach used to compare observed and estimated values in this study was determination coefficient (R2), Nash-Sutcliffe Efficiency (NSE), Root Mean Square Error (RMSE), Normalized Root Mean Square Error (NRMSE), and Mean Bias Error (MBE). The results showed a high relation between the POWER reanalysis dataset and observed data for all parameters except wind speed. For daily maximum, minimum and mean temperature, the R2 and NSE achieved higher than 0.91 and 0.88 respectively, while the mean bias error MBE ranged between -3 °C up to +2 °C and the RMSE was less than 4 °C in all stations. Additionally, POWER estimated data correlation accuracy for temperature variables increased toward higher altitudes in the study area. Similarly, this performance was followed by relative humidity, increasing relation accuracy toward higher elevated regions. The R2 was higher than 0.69 in higher altitudes and less than 0.4 in lower elevations. The MBE for relative humidity ranges -2% in Antalya to +9% in Ankara, and the RMSE attained less than 13.81% in all regions. The POWER daily wind speed did not show relation with observed data without adjusting for elevation and seasonal bias correction. Overall, it was concluded that the NASA POWER dataset could predict temperature and relative humidity over study area and give a promising result if used in research, water, and agricultural decision-making where observation data are not available.
Yonca Üretiminde Enerji Tüketimi: Hasat Sistemleri Arasında Bir Karşılaştırma
Authors: GÜNGÖRMEZ Muttalip , TAN Fulya , BARAN Mehmet Fırat
Published: January 2023

Bu çalışmanın temel amacı, Tekirdağ ilinde balya formunda yonca kuru otu üretiminde kullanılan farklı hasat sistemlerinin girdi ve çıktı enerjilerini belirlemektir. Veriler 2019 yılında 176 yonca işletmesinden toplanmıştır. Çalışılan işletme sayısını belirlemek için tesadüf örnekleme metodu kullanılmıştır. Hasat sistemleri, yonca üretiminde kullanılan farklı alet ve makina kombinasyonlarından oluşmaktadır. Kullanılan makinaların özellikleri ve kapasitesi birbirinden oldukça farklıdır. Hasat sistemlerinde; balya makinası (dikdörtgenler prizması/silindirik), şartlandırıcı tırmıkların kullanım sıklığı ve sayıları dikkate alınmıştır. Bu nedenle, çalışma gruplarında 6 farklı hasat sistemi oluşturulmuştur (H/1-6). İlave olarak, biçim sayısına göre (1,2,3,4,5,6) hasat sistemlerinin enerji tüketimleri de incelenmiştir. İlk biçim prosesi olarak yonca üretimi dikkate alınırken, tek biçim prosesi olarak kesme işleminden sonraki uygulamalar dikkate alınmıştır. Araştırma sonuçları enerji kullanım etkinliği, enerji üretkenliği, net enerji üretiminin balya makinası çeşidine, şartlandırıcı kullanım sayısına göre değiştiğini göstermiştir. Hasat sistemlerinde toplam girdi ve çıktı enerji değerleri oldukça değişken olmuştur. En yüksek enerji girdisi oranı yakıt (38.77%) ve azotlu gübrelemede (24.89%) kaydedilmiştir. En yüksek kullanılan yakıt miktarına karşılık olarak birim alan için toplam H6 sisteminde 3244.57 MJha-1 yakıt enerjisi hesaplanmıştır. Şartlandırıcı ekipman kullanım sayısının artışı ve biçim sayısının artmasına bağlı olarak enerji tüketimleri de artmıştır. Altı biçim yapıldığında; dikdörtgenler prizması şeklinde balya yapan balya makinası kullanılan hasat sisteminde 1248.57 MJha-1 makina enerjisi tüketimi, silindirik balya makinası kullanılan hasat sisteminde ise 1751.07 MJha-1 makina enerjisi tüketimi hesaplanmıştır. En yüksek toplam enerji girdisi (ilk biçim) silindirik balya makinasının kullanıldığı sistemlerde (H5-H6) 8179.41 MJha-1, 8377.54 MJha-1 olarak hesaplanmıştır. En düşük özgül enerji dikdörtgen balya makinası kullanılan sistemlerde (H3-H4) 2.94 MJkg-1, 3.17 MJkg-1 olarak hesaplanmıştır.
Biyogaz Tesislerinde Üretilen Gübrenin Değerlendirilme Metotları ve Fizibiliteye Etkisi
Authors: ÇOBAN Volkan
Published: January 2023

Globalleşen dünyanın en büyük ihtiyaçlarından biri de enerjidir. Bu sebeple Dünyada ve ülkemizde yenilenebilir enerji kaynağı olan biyogaz tesislerinden enerji üretimi gün geçtikçe artmaktadır. Hayvansal kaynaklı hammaddeden biyogaz üretimi sonrasında katı ve sıvı gübre olmak üzere çeşitli çıktılar elde edilmektedir. Bu tesislerde üretilen gübrenin tarımda değerlendirilmesi gerek yatırım fizibilitesine gerekse çevreye verebileceği olası negatif etkisinden dolayı önem arz etmektedir. Bu çalışmada mezofilik şartlarda çalışan 3 MW elektrik üretim kapasiteli bir yaş fermantasyon tesisinde biyogaz üretimi boyutlandırılmıştır. Biyogaz tesisinin hidrolik bekletme süresi olarak 34 gün seçilmiştir. Fermantasyon tankları ise sürekli karıştırmalı tank reaktörlerdir. Enerji eldesi için biyogaz motoru kullanılmıştır. Biyogaz tesisinde enerji eldesinin yanında ürün olarak katı ve sıvı gübre üretilmektedir. Biyogaz tesisinde üretilen katı gübrenin satılabilir forma dönüştürülebilmesi ve toprakta uygulandığında daha verimli olabilmesi için zenginleştirme işlemleri sıralanmıştır. Üretilen gübrenin 3 farklı şekilde değerlendirilebileceği göz önünde bulundurularak yapılabilirlik analizleri incelenmiştir. İlk opsiyonda üretilen gübre satılmadan direkt tarımda kullanıldığı, ikinci opsiyonda katı organik gübre olarak satıldığı, diğer opsiyonda ise içerisine gerekli ilaveler yapılarak organomineral gübre formuna dönüştürülüp satıldığı düşünülmüştür. Elde edilen sonuçlar kapsamında enerji üretiminin yanı sıra gübre satışının tesis fizibilitesine olan etkileri ortaya konulmuştur. Yapılan hesaplamalar ışığında; tesislerin birim kW başına maliyetleri sırasıyla; 2.090 $/kWe, 3.726 $/kWe, 6.225 kWe olmaktadır. Yalnızca elektrik üretiminden gelir elde bir biyogaz tesisinin 6,01 yıl olan basit geri ödeme süresi, elektrik satışına ek organomineral gübre satışı ile 1,69 yıla indirgendiği tespit edilmiştir. Gübrenin organik gübre olarak satılması durumunda ise basit geri ödeme süresi 4,24 yıl olmuştur. Ancak, geri ödemesi süresinin azalmasına karşılık ilave olarak sisteme eklenecek diamonyumfosfat maliyeti biyogaz tesis maliyetlerini yaklaşık olarak %92,5 oranında artırdığı gözlenmiştir.
Biological interactions potentially alter the large-scale distribution pattern of the small pelagic fish, Pacific saury Cololabis saira
Authors: Fuji T , Nakayama SI , Hashimoto M , Miyamoto H , Kamimura Y , Furuichi S , Oshima K , Suyama S
Published: January 2023

We aimed to understand the effect of biological interactions on the distribution of small pelagic fishes. Surveys were conducted during 2003-2019 using sea surface trawl nets in the western and central North Pacific Ocean, covering an area between 143° E and 165° W, to estimate the distributions of 4 small pelagic fishes: Pacific saury Cololabis saira, Japanese sardine Sardinops melanostictus, chub mackerel Scomber japonicus, and Japanese anchovy Engraulis japonicus. These species are potential competitors, as they all occupy a similar niche. Japanese anchovy was abundant during 2003-2012, while Japanese sardine and chub mackerel were abundant during 2013-2019. Only Pacific saury was distributed throughout the survey area, while the others occurred within the area west of 180° longitude (WA). Pacific saury and its potential competitors showed adjacent distributions, with a slight overlap along sea surface temperature gradients in the WA. This distribution pattern remained even when Japanese sardine expanded its distribution to colder waters and increased in abundance after 2013, resulting in a shift in the distribution of Pacific saury to colder waters and a period of high densities of Japanese sardine. Such a distribution shift of Pacific saury was not observed in the area east of 180° longitude, where no Japanese sardine was observed. These results suggest the possibility that biological interactions such as inter-species competition can be an important factor in determining the distribution of small pelagic fishes.