bluuebunny/crossref_metadata_2025 huggingface dataset:
KHẢO SÁT ĐẶC ĐIỂM LÂM SÀNG, CẬN LÂM SÀNG VÀ CÁC YẾU TỐ NGUY CƠ CỦA ĐỘT QUỴ NHỒI MÁU NÃO CẤP Ở BỆNH NHÂN RUNG NHĨ KHÔNG DO BỆNH VAN TIM
Authors: Nguyễn Ngọc Phương Thư , Dương Thị Trang , Trương Đình Cẩm
Published: January 2024

Đặt vấn đề: Rung nhĩ (RN) là rối loạn nhịp tim thường gặp nhất ở người lớn, chiếm khoảng 2 đến 4% dân số [1]. Đây cũng là yếu tố nguy cơ chính của đột quỵ nhồi máu não cấp. Ở bệnh nhân RN, nguy cơ đột quỵ nhồi máu não cấp cao hơn 5 lần [2] và nguy cơ tử vong tăng hơn 2 lần so với dân số chung [3]. Đột quỵ do RN gây tàn phế nặng hơn, tiêu hao chi phí y tế nhiều hơn, tỷ lệ tái phát và tử vong cao hơn ở bệnh nhân nhồi máu não cấp không kèm RN. Vì vậy, đánh giá nguy cơ của đột quỵ nhồi máu não cấp để có chiến lược phòng ngừa thích hợp là nền tảng trong điều trị RN. Trên lâm sàng, rung nhĩ không do bệnh van tim (RNKBVT) chiếm hơn 95% các trường hợp RN được chẩn đoán [4] và có liên quan khoảng 15% [5] tổng số đột quỵ nhồi máu não nên ngày càng được quan tâm. Mục Tiêu Nghiên Cứu: 1. Khảo sát đặc điểm lâm sàng và cận lâm sàng ở bệnh nhân RNKBVT tại Bệnh viện Quân Y 175; 2. Khảo sát các yếu tố nguy cơ của đột quỵ nhồi máu não cấp ở bệnh nhân RNKBVT tại Bệnh viện Quân Y 175. Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang được thực hiện trên bệnh nhân RNKBVT tại Bệnh viện Quân Y 175, từ tháng 2/2020 đến tháng 04/2021. RN đươc chẩn đoán dựa trên ECG 12 chuyển đạo. Nhồi máu não cấp được chẩn đoán theo tiêu chuẩn của Tổ chức y tế thế giới. Các đặc điểm lâm sàng và cận lâm sàng được thu thập theo bảng câu hỏi soạn sẵn. Kết quả: Tổng cộng có 103 bệnh nhân tham gia nghiên cứu, với 25 bệnh nhân bị nhồi máu não (24,3%). Tuổi trung bình là 72,02. Nam giới chiếm 46,6%. Gần 95% bệnh nhân có ít nhất một bệnh đồng mắc và gần 50% có từ ba bệnh đồng mắc trở lên. Các yếu tố tiên đoán nguy cơ cao bị nhồi máu não ở bệnh nhân RNKBVT là không tuân thủ điều trị với thuốc đã được kê toa và tiền căn đột quỵ trước đó. Kết luận: Cần chú trọng công tác giáo dục sức khỏe cho bệnh nhân về hậu quả của đột quỵ và lợi ích của việc tuân thủ điều trị. Không tuân thủ điều trị làm tăng nguy cơ nhồi máu não cấp lên 14,9 lần. Tiền căn đột quỵ làm tăng nguy cơ nhồi máu não cấp lên 11,2 lần.
PERANCANGAN USER INTERFACE DAN USER EXPERIENCE WEBSITE COMPANY PROFILE SARIRAYA Co,.Ltd
Authors: Hidayat Akik , Azizha Bunga
Published: January 2024

Company profile yang dikemas dalam bentuk sebuah website kini banyak digunakan perusahaan-perusahaan di seluruh dunia. Bagi perusahaan-perusahaan besar, website company profile sangatlah penting guna meningkatkan kepercayaan konsumen terhadap produk atau jasa yang mereka tawarkan. Dengan tampilan yang menarik dan fitur yang lengkap, website company profile dapat membantu perusahaan dalam hal pemasaran produk untuk menarik konsumen.

 Kata Kunci—Website, Company Profile
MODEL DAN SIMULASI PEMILAH SAMPAH LOGAM DAN NON LOGAM OTOMATIS BERBASIS ARDUINO
Authors: Yulianeu Aneu , Ridwanulloh Muhammad Fauzan
Published: January 2024

Penelitian ini bertujuan untuk dapat mempermudah dalam hal proses penyortiran benda logam yang mengandung magnet neodymium dan non logam. Sehingga pada penelitian ini dirancang sebuah sistem kontrol terhadap objek untuk memisahkan benda logam yang mengandung magnet neodymium dan non logam ke tempat yang berbeda menggunakan sebuah gate yang dikendalikan oleh arduino mega2560. Conveyor yang dirancang pada penelitian ini menggunakan belt konveyor, motor dc sebagai penggerak belt konveyor dan menggunakan satu buah motor servo untuk menggerakkan gate tersebut. Prinsip kerja pada alat conveyor ini, ketika conveyor berputar, kemudian sensor induktif akan mendeteksi benda logam yang mengandung magnet neodymium atau benda non logam. Ketika benda yang terdeteksi adalah benda logam yang mengandung magnet neodymium maka gate berbelok kekanan sehingga benda jatuh ke wadah khusus untuk benda logam yang mengandung magnet neodymium. Sebaliknya, ketika benda yang terdeteksi merupakan benda non logam maka gate berbelok ke kiri sehingga benda jatuh ke wadah khusus untuk benda non logam. Dari pengujian yang dilakukan menunjukkan bahwa sistem kontrol yang dibuat sudah sesuai dengan rencana awal.

 
Kata kunci: konveyor, magnet neodymium, arduino mega 2560, motor servo, motor dc.
INFORMASI PENJADWALAN PENGGUNAAN RUANGAN BERDASARKAN JADWAL 0420119006 MATA KULIAH DENGAN NOTIFIKASI BERBASIS ARDUINO UNO
Authors: Sidik Irpan Mahpud
Published: January 2024

Pembelajaran ngajar mengajar baik itu di sekolah tinggi tentu saja menginginkan rasa nyaman, tenang dan tentram, supaya menghasilkan anak didik yang berpotensi dan berprestasi di bidang apapun, semua keinginan itu tentu saja ada faktor-faktor untuk menunjang keinginan seperti itu.

penelitian ini bertujuan untuk menghasilkan sebuah alat yaitu menginformasikan kepada mahasiswa bahwa di kelas tersebut sedang melakukan pembelajaran, sehingga diharapkan mahasiswa tersebut bisa mengetahui dimana mereka belajar dan dosen siapa yang mengajar dia, informasi ini di tampilkan lewat lcd setelah dosen menempelkan kartu yang di baca oleh rfid, dan ketika pembelajaran selesai akan ada pemberitahuan bunyi buzzer. Untuk itu penulis mengharapkan agar alat tersebut mampu menarik perhatian supaya mahasiswa dapat belajar lebih semangat lagi. Penelitian ini dilakukan berdasarkan hasil analisis pengumpulan data, pengamatan secara langsung system cara kerja alat, wawancara dengan pihak-pihak yang terkait dan mencari sumber-sumber yang relevan untuk mendukung secara teoristis.

Untuk Bahasa pemrogramam yang digunakan untuk pembuatan program dalam penelitian ini adalah dengan menggunakan bahasa C dan Arduino Software sebagai alat perancangan program. Karena bahasa C dan Arduino Sofware memang di rekomendasikan oleh perusahaan Arduino.

 
Kata kunci : informasi penjadwalan, LCD 16x4, RFID-RC522, RTC DS3231, arduino.
RANCANG BANGUN SISTEM INFORMASI PENGOLAHAN NILAI RAPOT KTSP PADA SMP NEGERI 1 SINDANGKASIH
Authors: Sugandi Indriyani Agustin , Durahman Nanang
Published: January 2024

SMP Negeri 1 Sindangkasih merupakan salah satu sekolah dasar di kabupaten Ciamis.  Setiap siswa di sekolah tersebut akan mendapatkan raport setelah uts selesai, setelah uas dan ketika akan kenaikan kelas. Guru-guru pada sekolah tersebut akan mengolah nilai untuk setiap siswa. Nilai-nilai tersebut ditulis pada raport yang akan diberikan kepada setiap siswa.. Pengolahan nilai pada SMP Negeri 1 Sindangkasih masih menggunakan cara yang manual. Terdapat kekurangan yang terjadi diantaranya waktu yang tidak efisien karena harus ditulis secara manual, Selain itu sering terjadinya kesalahan penulisan. Dibutuhkan suatu sistem yang terkomputerisasi agar memudahkan pembuatan dan pengolahan nilai raport dan pengelolaan nilai tersebut menjadi lebih efektif dan efisien Dalam pengembangan perangkat lunak yang digunakan menggunakan metode waterfall, dimana langkah-langkahnya yaitu analisis kebutuhan, perancangan sistem dan perangkat lunak, implementasi dan pengujian unit. Sedangkan untuk teknik pengumpulan data dilakukan tahapan wawancara, observasi dan studi pustaka. Dengan adanya sistem informasi pengolahan nilai raport ktsp siswa maka diharapkan Membantu dalam proses pengolahan nilai raport, Mengefektifkan waktu dalam pembuatan raport siswa, Membuat data menjadi lebih akurat.                          

 
Kata Kunci: Raport, Sistem Informasi, Sistem Informasi Pengolahan Nilai Raport.
Estudio comparativo de los parques nacionales y las reservas de la biosfera (1899-2000)
Authors: Esparza-Hernández Luis Gerardo
Published: January 2024

En la presente investigación se abordó de forma comparativa las declaratorias presidenciales de áreas naturales protegidas (1899-2000) en México, haciendo especial énfasis en los parques nacionales y las reservas de la biosfera y se alcanzaron a distinguir aspectos relevantes externos e internos como la región geográfica, el periodo sexenal, la fijación de linderos, la disponibilidad y empleo de terrenos nacionales, la institución responsable de la administración, la ley marco; y si contemplan o no la participación de los propietarios de los recursos naturales que pueden ser limitantes de su aplicación, y en su caso propusimos acciones para superarlas.Se encontró que en dicho periodo se han empleado 42 categorías de áreas naturales protegidas, con predominio de las reservas forestales protectoras y los parques nacionales, pero la mayoría de ellas han sido dispersas, fragmentadas y coyunturales; se elaboró una clasificación que permitió no sólo ubicar en el tiempo y en nuestra geografía nacional el matiz del tema ambiental, ya sea de protección, conservación o preservación, sino también diferenciar las grandes etapas por las que ha transitado el tema ambiental en nuestro país.Se concluye que si no se abre espacio a los propietarios de los recursos naturales, banqueros, industriales, etcétera, en el tema ambiental, será muy difícil detener y mitigar la degradación de los recursos naturales.
Diversificación productiva café–plantas ornamentales en La Sidra, Atzacan, Veracruz
Authors: Hernández-Meneses Fátima , Licona-Vargas Atenógenes Leobardo , Pérez-Portilla Emiliano , Cisneros-Solano Víctor Manuel , Díaz-Cárdenas Salvador
Published: January 2024

El café es uno de los cultivos de mayor importancia económica en México. Se cultiva en 15 estados pero Chiapas, Oaxaca, Puebla y Veracruz concentran 83% del total de la superficie nacional plantada (781 016 ha). La crisis del precio y la reducción en los rendimientos han forzado a los cafeticultores a buscar estrategias que les permitan compensar las pérdidas económicas. Una de esas opciones es la diversificación productiva que incluye hortalizas, cultivos básicos, frutales, maderables, ornamentales e incluso animales. La horticultura ornamental es una de las estrategias por la que han apostado los cafeticultores, ya que en México se le considera una actividad agrícola en crecimiento constante. Aunque en Veracruz el desarrollo de esta industria es relativamente reciente y el interés es cada vez mayor, en las comunidades cafetaleras no ha pasado desapercibida. La presente investigación se llevó a cabo en la comunidad de La Sidra, Atzacan, Veracruz, y se planteó como objetivos caracterizar y evaluar la diversificación productiva de las unidades de producción donde se cultivan el café y las plantas ornamentales. Se identificaron básicamente cuatro modalidades de producción: 1) Diversificación con café, caña de azúcar, gardenias y coníferas; 2) Diversificación con café, gardenias y coníferas; 3) Diversificación con café y mosaicos de diversas especies ornamentales; 4) Plantaciones y viveros de ornamentales diversificados en sustitución del café. Las especies ornamentales más representativas en la diversificación productiva fueron la gardenia y las coníferas. En el área de estudio la actividad ornamental ha crecido en tal magnitud que ya se considera una actividad agrícola de importancia, comparada con otros cultivos como la caña de azúcar y la ganadería. Algunos productores han diversificado o sustituido sus cafetales con el cultivo de plantas ornamentales en virtud de los mejores ingresos.
Sosialisasi Peran Pola Asuh Orang Tua Sebagai Upaya Peningkatan Pemahaman Warga Desa Nglaban Melalui Posyandu Balita Desa Nglaban
Authors: Durrotunnafisa Durrotunafisa , Rosy Brillian
Published: January 2024

Peran pola asuh orang tua merupakan suatu hal penting dalam membentuk kepribadian anak. Setiap orang tua memiliki pola asuh yang berbeda. Terdapat 3 jenis pola asuh orang tua, yaitu pola asuh otoriter, pola asuh demokratis, dan pola asuh permisif. Perlu adanya sosialisasi tentang peran pola asuh orang tua sebagai upaya peningkatan pemahaman orang tua terhadap pola asuh anak. Oleh karena itu, KKN-T Unesa Kelompok 28 melakukan sosialisasi di Posyandu Balita Desa Nglaban. Metode yang digunakan yaitu pendidikan masyarakat melalui kegiatan sosialisasi di Posyandu Balita Desa Nglaban. Kegiatan sosialisasi ini diharapkan dapat meningkatkan pemahaman orang tua dalam mendukung tumbuh kembang anak sebagai bentuk peningkatan kualitas sumber daya manusia.
Peningkatan Kesehatan dan Solidaritas Masyarakat Melalui Program Donor Darah
Authors: Purwati Linda
Published: January 2024

Darah merupakan kebutuhan pokok setiap umat manusia. Donor darah menjadi bagian yang tidak terpisahkan untuk menunjang kesehatan sebagaimana tercukupinya kebutuhan darah dalam tubuh. Desa Nglaban merupakan salah satu desa di Kecamatan Loceret, Kabupaten Nganjuk dengan jumlah penduduk 6.228 jiwa, namun yang memiliki kesadaran donor darah hanya 3-4 orang dari total penduduk tersebut. Oleh karena itu, mahasiswa KKN-T 28 UNESA mengadakan program donor darah yang dibuka untuk umum, utamanya untuk masyarakat Desa Nglaban. Tujuannya yaitu, (1) meningkatkan kesehatan masyarakat, (2) meningkatkan jumlah masyarakat yang sadar akan pentingnya donor darah, dan (3) meningkatnya jumlah pendonor darah di desa tersebut. Kegiatan pengabdian masyarakat ini dimulai dengan mengadakan survei ke bidan desa dan pamong desa. Kemudian dilanjut dengan pembentukan program, pelaksanakan sosialisasi kepada masyarakat, dan pelaksanaan donor darah pada tanggal 18 Mei 2023. Hasilnya melalui program donor darah ini, terjadi peningkatan kesadaran dan kemauan masyarakat Desa Nglaban untuk mengikuti kegiatan donor darah.
 
Kata Kunci: Donor Darah, Nglaban
Approach to the patient with non-cirrhotic splanchnic venous thrombosis: a brief narrative review
Authors: Ávila-Rodríguez V , Rondón-Carvajal J , De La Espriella-Palmett V.M.
Published: January 2024

Splanchnic venous thrombosis refers to the obstructive events of the abdominal venous system (portal, splenic, mesenteric, and suprahepatic) present with or without an underlying liver disease. These are rare disorders generally associated with both local risk factors, such as intra-abdominal infections, surgery or abdominal trauma, and systemic risk factors, represented by drugs (notably estrogen therapy) and some types of inherited or acquired thrombophilia, including myeloproliferative neoplasms associated with the V617F mutation of the JAK2 gene. The clinical presentation is heterogeneous, ranging from asymptomatic patients with incidental findings on abdominopelvic imaging to severe systemic compromise in sudden onset cases, with a high morbidity and mortality burden. Anticoagulation therapy is the current recommended treatment based on observational studies, with no consensus on management in the acute and long-term setting for both inmediate complications such as acute liver failure and intestinal ischemia or those arising from secondary portal hypertension over a longer period of time.
Jejunal bleeding: a case report
Authors: Vandewinckele J , Vanduyfhuys B , Claerhout B , Schoenaers P , Sierens B , Duthoi K
Published: January 2024

Small intestinal bleeding remains a relatively uncommon event, accounting for 5-10% of all patients presenting with gastrointestinal bleeding. A rare but significant source includes hemangioma of the small intestine. Here we present a case of a 78-year-old female patient admitted with recurrent melena and iron deficiency anemia. After performing a normal upper and lower endoscopic examination, we suspected small bowel bleeding. Correspondingly, the patient underwent a video capsule endoscopy, showing a submucosal nodular lesion in the distal jejunum. Balloon enteroscopy clearly identified and inked the lesion, facilitating minimally invasive surgery. Pathology demonstrated a cavernous hemangioma. As we did not have a conclusive diagnosis preoperative and endoscopic intervention may have led to uncontrolled bleeding or perforation, laparoscopy was chosen to conduct a better evaluation. The present case findings emphasize that gastrointestinal hemangiomas, although uncommon, should be considered in the differential diagnosis of patients who present with unexplained gastrointestinal bleeding or other abdominal symptoms.
A survey among Flemish gastroenterologists about endoscopic sedation practices in colorectal cancer screening
Authors: Arnaert S , Vandebroek V , Persyn D , Cool M , Lambrecht G , Desmet G , Deboever G
Published: January 2024

Background & study aims: The sedation levels and methods used for colonoscopy in colorectal cancer screening programs vary from country to country and from continent to continent. Little is known in the literature about how frequently the different sedation levels are used in colorectal cancer screening colonoscopies. We made a survey among all Flemish gastroenterologists (GI) to determine how frequently they use the different sedation modalities in this target population and to determine the motives of the GI to opt for one or another sedation modality.

Patient and methods: An online survey was sent to all 329 Flemish GI by e-mail. A reminder e-mail was sent one month later. Participants could indicate how frequently (by percentage) they used the different sedation methods (no sedation, minimal sedation, conscious sedation, deep sedation) and which sedative medication they administered. In addition, they were asked to indicate their main motives for choosing a specific sedation method. Descriptive statistics were used.

Results: 112 out of 329 GI answered the questionnaire (response rate 34%). Anesthesia monitored care is the most frequently used sedation modality, followed by conscious sedation. Patient preference is the main motive for most GI to use each sedation modality.

Conclusions: Anesthesia monitored care is currently the most frequently used sedation regimen to perform a colonoscopy in the FIT positive population or in the colorectal cancer screening program in Flanders. The motives given by the GI for choosing one or another sedation modality are not always congruent with current scientific evidence or guidelines.

Keywords: colonoscopy, sedation practices, colorectal cancer screening, water exchange, anesthesia monitored care.
Motorized spiral enteroscopy: this is the end my friend?
Authors: Moreels T.G.
Published: January 2024

Endoscopic devices have a history of being launched as the next big thing, and subsequently being retrieved from the marked because of efficacy or safety concerns. The Shapelock overtube to overcome sigmoid loop formation during colonoscopy and the Enteryx implant to reduce gastro-oesophageal reflux are only two examples (1,2). They were voluntarily removed by the manufacturers because of serious adverse events. These were accessory devices to facilitate endoscopy or to perform endoscopic therapeutic interventions.
A Correction Algorithm for Propeller-Induced Airflow and Flight Attitude Changes during Three-Dimensional Wind Speed Measurements Made from A Rotary Unmanned Aerial Vehicle
Authors: Yang Yanrong , Zhang Yuheng , Han Tianran , Xie Conghui , Liu Yayong , Huang Yufei , Zhou Jietao , Sun Haijiong , Zhao Delong , Zhang Kui , Li Shao-Meng
Published: January 2024

Abstract. A hexacopter unmanned aerial vehicle (UAV) was fitted with a three-dimensional sonic anemometer to measure three-dimensional wind speed, air temperature, relative humidity, and pressure. To obtain accurate results for three-dimensional wind speeds, we developed an algorithm to correct biases caused by the propeller-induced airflow disturbance, UVA movement, and changes in flight attitude in the three-dimensional wind measurements. The wind measurement platform was built based on a custom-designed integration kit that couples seamlessly to the UAV, equipped with a payload and the sonic anemometer. Based on an accurate digital model of the integrated UAV-payload-anemometer platform, computational fluid dynamics (CFD) simulations were performed to quantify the wind speed disturbances caused by the rotation of the UAV's rotor on the anemometer during the UAV's steady flight under headwind, tailwind, and crosswind conditions. Through analysis of the simulated data, regression equations were developed to predict the wind speed disturbance, and the correction algorithm for rotor disturbances, motions, and attitude changes was developed. To validate the correction algorithm, we conducted a comparison study in which the integrated UAV system flew around a meteorological tower on which three-dimensional wind measurements were made at multiple altitudes. The comparison between the corrected UAV wind data and those from the meteorological tower demonstrated an excellent agreement. The corrections result in significant reductions in wind speed bias caused mostly by the propellers, along with notable changes in the dominant wind direction and wind speed in the original data. The algorithm enables reliable and accurate wind speed measurements in the atmospheric boundary layer made from rotorcraft UAVs.
ampycloud: an algorithm to characterize cloud layers above aerodromes using ceilometer measurements
Authors: Vogt Frédéric P. A. , Foresti Loris , Regenass Daniel , Tarin Burriel Néstor , Bibby Mervyn , Juda Przemysław , Balmelli Simone , Hanselmann Tobias , du Preez Pieter
Published: January 2024

Abstract. Ceilometers are used routinely at aerodromes world-wide to measure the height and sky coverage fraction of cloud layers. This information, possibly combined with direct observations by human observers, contributes to the production of Meteorological Aerodrome Reports (METARs). Here, we present ampycloud, a new algorithm and associated Python package for automatic processing of ceilometer measurements, with the aim to characterize cloud layers above aerodromes. The ampycloud algorithm has been developed at the Swiss Federal Office of Meteorology and Climatology (MeteoSwiss) as part of the AMAROC (AutoMETAR/AutoReport rOund the Clock) program, to fully automate the creation of METARs at Swiss civil aerodromes. ampycloud is designed to work with no (direct) human supervision. The algorithm consists of three distinct, sequential steps that rely on agglomerative clustering methods and Gaussian mixture models to identify distinct cloud layers. The robustness of the ampycloud algorithm stems from the first processing step, simple and reliable. It constrains the two subsequent processing steps that are more sensitive, but also better suited to handle complex cloud distributions. The software implementation of the ampycloud algorithm takes the form of an eponym, pip-installable Python package developed on Github. The code is made accessible to the general community as an open-source software under the terms of the 3-Clause BSD license.
Coupling a large-scale glacier and hydrological model (OGGM v1.5.3 and CWatM V1.08) – Towards an improved representation of mountain water resources in global assessments
Authors: Hanus Sarah , Schuster Lilian , Burek Peter , Maussion Fabien , Wada Yoshihide , Viviroli Daniel
Published: January 2024

Abstract. Glaciers are present in many large river basins, and due to climate change, they are undergoing considerable changes in terms of area, volume, runoff and seasonality. Although the spatial extent of glaciers is very limited in most large river basins, their role in hydrology can be substantial because glaciers store large amounts of water at varying time scales. Large-scale hydrological models are an important tool to assess climate change impacts on water resources in large river basins worldwide. Nevertheless, glaciers remain poorly represented in large-scale hydrological models. Here we present a coupling between the large-scale glacier model OGGM (v1.5.3) and the large-scale hydrological model CWatM (V1.08). We evaluated the improved glacier representation in the coupled model against the baseline hydrological model for selected river basins at 5 arcmin resolution and globally at 30 arcmin resolution, focusing on discharge projections under climate change scenarios. We find that increases in future discharge are attenuated, whereas decreases are exacerbated when glaciers are represented explicitly in the large-scale hydrological model simulations. This is explained by a projected decrease in glacier runoff in almost all basins. Calibration can compensate for lacking glacier representation in large-scale hydrological models in the past. Nevertheless, only an improved glacier representation can prevent underestimating future discharge changes, even far downstream at the outlets of large glacierized river basins. Therefore, incorporating a glacier representation into large-scale hydrological models is important for climate change impact studies, particularly when focusing on summer months or extreme years.
Accounting for Aerosols Effect in GHGSat Methane Retrieval
Authors: Yu Qiurun , Jervis Dylan , Huang Yi
Published: January 2024

Abstract. GHGSat comprises a constellation of high spatial and spectral resolution satellites, specializing in monitoring methane emissions at 1.65 μm. This study investigates the ability to accurately retrieve both the methane mixing ratio enhancement (ΔXCH4) and aerosol optical depth (XAOD) simultaneously from simulated GHGSat observations that incorporate angle-dependent scattering information. Results indicate that the polarity of ΔXCH4 when neglecting aerosols changes from negative to positive as surface albedo increases, which is consistent with previous studies. Biases in ΔXCH4 are most pronounced when XAOD is not simultaneously retrieved, ranging from −3.0 % to 6.3 % with a 0.1 AOD, a 60° solar zenith angle, and a 0.2 surface albedo for the nadir-only retrieval. Using multiple satellite viewing angles during the GHGSat observation sequence with a scattering angle ranging from 100° to 140°, the study shows that the mean bias and standard deviation of XCH4 are within 0.2 % and 2.7 % relative to the background. The correlation between simultaneously retrieved ΔXCH4 and XAOD shifts from positive to negative as surface albedo increases and aerosol asymmetry factor decreases, signifying a transition of the dominating aerosol effect from aerosol-only scattering to aerosol-surface multiple scattering. The variety of scattering angle ranges has little impact on the performance of the multi-angle viewing method. This study improves the understanding of the aerosol impact on the GHGSat ΔXCH4 retrieval and provides guidance for improving future GHGSat-like point-source imagers.
Cosmogenic 3He chronology of postglacial lava flows at Mt. Ruapehu, New Zealand
Authors: Doll Pedro , Eaves Shaun Robert , Kennedy Ben Matthew , Blard Pierre-Henri , Nichols Alexander Robert Lee , Leonard Graham Sloan , Townsend Dougal Bruce , Cole Jim William , Conway Chris Edward , Baldwin Sacha , Fénisse Gabriel , Zimmermann Laurent , Tibari Bouchaïb
Published: January 2024

Abstract. Accurate volcanic hazard assessments rely on a detailed understanding of the timing of past eruptions. While radiometric methods like 40Ar/39Ar or K/Ar are by far the most conventional lava flow dating tools, their low resolution for young (<20 ka) deposits interferes with the development of precise recent effusive chronologies on most volcanoes. Mt. Ruapehu (New Zealand) has produced many lava flows throughout its history, but the precise timing of many recent eruptions remains largely unknown. In this study, we use cosmogenic 3He exposure dating to provide 23 eruption ages of young lava flows at Ruapehu. We then compare our results with existing 40Ar/39Ar and palaeomagnetic constraints, highlighting the value of cosmogenic nuclides exposure dating in refining recent eruptive chronologies. Of the 23 sampled flows, 16 provided robust eruption ages (5–20 % internal 2σ; n≥3) between ca 20 and 8 ka, except for one lava erupted at around 43 ka, and their age distribution indicates that, during the last 20 thousand years, effusive activity at Ruapehu peaked at 17–12 ka and at 9–7.5 ka. Nearly identical eruption ages of lavas located in different flanks of the volcanic edifice suggest concurrent activity from multiple vents during relatively short time intervals (0–2 kyr) at around 13, 10 and 8 ka. We analysed four lavas previously dated by 40Ar/39Ar, two of which yielded eruption ages older than the older limit of the 2σ interval of the radiometric dates, but the good clustering of individual samples from our sites suggests that our results better represent these lava flows’ real eruption ages. Our 3He-based dates show excellent agreement with palaeomagnetic constraints, suggesting that production rate uncertainties are unlikely to impact the accuracy of our eruption ages. This study demonstrates how cosmogenic nuclides dating can provide greater detail on the recent effusive chronology of statovolcanoes, helping to resolve the low resolution and difficulty in applying radiometric dating methods to young lava flows.
Elevation-dependent warming: observations, models, and energetic mechanisms
Authors: Byrne Michael P. , Boos William R. , Hu Shineng
Published: January 2024

Abstract. Observational data and numerical models suggest that, under climate change, elevated and non-elevated land surfaces warm at different rates. Proposed drivers of this "elevation-dependent warming" (EDW) include surface albedo and water vapour feedbacks, the temperature dependence of longwave emission, and aerosols. Yet the relative importance of each proposed mechanism both regionally and at large scales is unclear, highlighting an incomplete physical understanding of EDW. Here we use gridded observations, atmospheric reanalysis, and a range of climate model simulations to investigate EDW over the historical period across the tropics and subtropics (40° S to 40° N). Observations, reanalysis, and fully-coupled models exhibit annual-mean warming trends (1959–2014), binned by surface elevation, that are larger over elevated surfaces and broadly consistent across datasets. EDW varies by season, with stronger observed signals in boreal autumn and winter. Analysis of large ensembles of single-forcing simulations (1959–2005) suggests historical EDW is likely a forced response of the climate system rather than an artefact of internal variability, and is primarily driven by increasing greenhouse gas concentrations. To gain quantitative insight into the mechanisms contributing to large-scale EDW, a forcing/feedback framework based on top-of-atmosphere energy balance is applied to the fully-coupled models. This framework identifies the Planck and surface albedo feedbacks as being robust drivers of EDW (i.e., enhancing warming over elevated surfaces), with energy transport by the atmospheric circulation also playing an important role. In contrast, water vapour and cloud feedbacks along with weaker radiative forcing in elevated regions oppose EDW. Implications of the results for understanding future EDW are discussed.
Interseismic and long-term deformation of southeastern Sicily driven by the Ionian slab roll-back
Authors: Viger Amélie , Dominguez Stéphane , Mazzotti Stéphane , Peyret Michel , Henriquet Maxime , Barreca Giovanni , Monaco Carmelo , Damon Adrien
Published: January 2024

Abstract. New satellite geodetic data challenge our knowledge of the deformation mechanisms driving the active deformations affecting Southeastern Sicily. The PS-InSAR measurements evidence a generalized subsidence and an eastward tilting of the Hyblean Plateau combined with a local relative uplift along its eastern coast. In order to find a mechanical explanation for the present-day strain field, we investigate short and large-scale surface-to-crustal deformation processes. Geological and geophysical data suggest that the southward migration of the Calabrian subduction could be the causative geodynamic process. We evaluate this hypothesis using flexural modeling and show that the overloading of the Calabrian accretionary prism, combined with the downward pull force induced by the Ionian slab roll-back, are capable of flexuring the adjacent Hyblean continental crust, explaining the measured large-scale subsidence and eastward bending of the Hyblean Plateau. To explain the short-scale relative uplift evidenced along the eastern coast, we perform elastic modeling on identified or inferred onshore and offshore normal faults. We also investigate the potential effects of other deformation processes including upwelling mantle flow, volcanic deflation, and hydrologic loading. Our results enable us to propose an original seismic cycle model for Southeastern Sicily, linking the current interseismic strain field and the available long-term deformation data. This model is mainly driven by the southward migration of the Ionian slab roll-back which induces a downward force capable to flexure the Hyblean crust.
Natural marine bromoform emissions in the fully coupled ocean-atmosphere-model NorESM2
Authors: Booge Dennis , Tjiputra Jerry F. , Olivié Dirk J. L. , Quack Birgit , Krüger Kirstin
Published: January 2024

Abstract. Oceanic bromoform (CHBr3) is an important precursor of atmospheric bromine. Although highly relevant for the future halogen burden and ozone layer in the stratosphere, the global CHBr3 production in the ocean and its emissions are still poorly constrained in observations and are mostly neglected in climate models. Here, we newly implement marine CHBr3 in the state-of-the-art Norwegian Earth System Model (NorESM2) with fully coupled ocean-sea-ice-atmosphere biogeochemistry interactions. Our results are validated with oceanic and atmospheric observations from the HalOcAt (Halocarbons in the Ocean and Atmosphere) data base. The simulated mean oceanic concentrations (6.61±3.43 pmol L-1) are in good agreement with observations in open ocean regions (5.02±4.50 pmol L-1), while the mean atmospheric mixing ratios (0.76±0.39 ppt) are lower than observed but within the range of uncertainty (1.45±1.11 ppt). The NorESM2 ocean emissions of CHBr3 (214 Gg yr-1) are in the range of or higher than previously published estimates from bottom-up approaches but lower than estimates from top-down approaches. Annual mean emissions are mostly positive (sea-to-air), driven by oceanic concentrations, sea surface temperature and wind speed, dependent on season and location. During low-productivity winter seasons, model results imply some oceanic regions in high latitudes as sinks of atmospheric CHBr3, because of its elevated atmospheric mixing ratios. We further demonstrate that key drivers for the oceanic and atmospheric CHBr3 variability are spatially heterogeneous. In the tropical West Pacific, which is a hot spot for oceanic bromine delivery to the stratosphere, wind speed is the main driver for CHBr3 emissions on annual basis. In the North Atlantic as well as in the Southern Ocean region the atmospheric and oceanic CHBr3 variabilities are interacting during most of the seasons except for the winter months where sea surface temperature is the main driver. Our study provides improved process understanding of the biogeochemical cycling of CHBr3 and more reliable natural emission estimates especially on seasonal and spatial scales compared to previously published model estimates.
Compound droughts under climate change in Switzerland
Authors: von Matt Christoph Nathanael , Mülchi Regula , Gudmundsson Lukas , Martius Olivia
Published: January 2024

Abstract. The co-occurrence of meteorological, agricultural, and hydrological droughts (multivariate compound droughts) in Switzerland during growing season is problematic due to limitations in water abstractions from rivers during low flow periods, while at the same time the need for irrigation is high. We analyse compound droughts for 52 catchments in Switzerland during the extended summer season (May–Oct) using the transient climate and hydrological scenarios for Switzerland (CH2018 and Hydro-CH2018) for both a scenario with mitigation (RCP2.6, 8 model chains) and without mitigation (RCP8.5, 20 model chains). In the RCP8.5 scenario the number of compound drought days is projected to significantly increase by mid-century across all greater regions of Switzerland. The increased frequency is mainly a result of more frequent events (significant) rather than longer event durations (non-significant). Models generally agree on the sign of change. By 2085, compound drought events are projected to occur in median once per catchment per extended summer season north of the Alps and every 1–2 years south of the Alps. Further, the increases in compound drought days mainly occur between May–Oct leading to a shift into the main agricultural production season and a more pronounced seasonality with highest occurrence probabilities between mid-July and the begin of October. Coupled to the increase in days and events, significantly more catchments are projected to be affected by compound droughts at the same time. In the RCP2.6 (mitigation) scenario, the increase in the number of compound drought days and events is not significant by the end of the 21st century. In comparison with RCP8.5, the number of compound drought days are reduced by 50–55 % north of the Alps and up to 75 % south of the Alps by the end of the century. This emphasizes the need for coordinated adaptation in combination with mitigation measures taken at early stage.
Load assessment of a wind farm considering negative and positive yaw misalignment for wake steering
Authors: Thedin Regis , Barter Garrett , Jonkman Jason , Mudafort Rafael , Bay Christopher J. , Shaler Kelsey , Kreeft Jasper
Published: January 2024

Abstract. Wake steering strategies are employed to increase the overall power production of wind farms by deflecting wakes of upstream turbines away from downstream ones. The gain in net power comes at the expense of increased fatigue loads experienced by downstream turbines. In this work we investigate performance and fatigue loading characteristics of a small farm consisting of five aligned IEA Wind 15-MW wind turbines. A parametric study is performed where, for every wind direction from -20 to 20 degrees, the yaw misalignment angle varies from -25 to 25 degrees. This setup allowed us to investigate asymmetries and identify optimal conditions for a given wind direction. In general, we found that positive yaw configurations are preferred and that yaw configurations that result in attractive power gains (25 % or more when compared to a baseline no-yaw scenario) come with significant increase in fatigue loading (we used standard deviation and damage-equivalent load (DEL) of the blade-root, low-speed shaft, and tower-base moments as proxies for fatigue load). We found that for any given positive wind inflow angle, yaw angles between -2.5 and 15 degrees yield power gains of 10–20 % over a no-yaw baseline, and positive yaw is preferred because of lower fatigue loadings. For any given negative wind inflow angles, positive yaw also results in lower magnitudes of standard deviation and DEL for the channels investigated. A small power loss of up to 2 % is observed for some positive yaw angles under negative wind directions (as compared symmetric negative yaw and positive wind cases), but gains in terms of loads exceed 25 % and may be enough to justify a positive yaw configuration under negative winds as well. We show that such behavior can be explained by partial waking and the direction of rotation of the rotor.
Smart Attendance System Using Face Recognition
Authors: Thirukrishna J. T. , Revathi A. M. , Shashank Y. , Pandith Thejas , Samarth N.
Published: January 2024

Implementing an attendance system in schools and colleges is crucial, and relying on manual methods poses challenges such as reduced accuracy and maintenance issues. Utilizing face recognition techniques can significantly enhance accuracy and efficiency compared to traditional methods. Various existing systems incorporate technologies like face recognition using IoT, PIR sensors, and hardware devices, but maintaining these sensors can be challenging. We aim to address these challenges by implementing a system based on the Haar Cascade Algorithm, known for its high accuracy. This algorithm can capture images effectively within a range of 50-70cm. To simplify the process, we are developing a user-friendly graphical interface that enables image capture, dataset creation, and one-click dataset training. Upon successful face recognition, the system will display the student’s name and roll number, automatically recording this information in an attendance sheet with the corresponding time and date.
Tr1 cell biology in ankylosing spondylitis
Authors:   , McGinty Joanna
Published: January 2024

Ankylosing sponydilitis is a common type of immune-mediated arthritis that affects approximately 1 in 200 people globally. The genetic association between HLA-B27 is well established, however large-scale genomics studies have defined non-HLA variants that confer risk of AS development. The genetic variants identified are known to control various aspects of T cell function, which raises the question: do these genotypes associated with an increased risk of AS lead to defective T cells and therefore chronic inflammation? The aim of this study was to characterise and compare Tr1 cells, a subset of regulatory immune cells, in AS patients and healthy controls.
Entre traza y decoración en la arquitectura tardogótica. De vueltas con el problema de Diego de Riaño (ca.1490-1534) y colaboradores
Authors: Romero Medina Raúl
Published: January 2024

A finales de la Edad Media la arquitectura en Europa está dominada por las fórmulas “al uso moderno” impuestas por el lenguaje del tardogótico. Paralelamente, se recurre al lenguaje decorativo y formal a la italiana como sistema simbólico de referencia del poder. Maestros de cantería hispanos —arquitectos— y maestros de la ornamentación desempeñan diferentes responsabilidades profesionales en unas fábricas complejas, a veces alejadas del problema del Renacimiento o, en el caso, de un supuesto bilingüismo arquitectónico. En la región de la Baja Andalucía este capítulo cobra especial interés de la mano de Diego de Riaño (ca. 1490-1534) y de otros colaboradores,5t6t cuyo debate científico sigue abierto. Sin intenciones polémicas sino dialogales, este texto contribuye a nutrir el panorama general de los estudios de la arquitectura finimedieval.
Sociología pragmática, representaciones y política. Dispositivo para un estudio de la derecha
Authors: Quiroga Paula Inés
Published: January 2024

Desde la sociología pragmática  buscamos aportar a la comprensión del orden social. Se trata de una aproximación que busca sortear determinismos e indeterminismos. Nos asistimos de aportaciones del framing; que es una teoría y una metodología desde la cual indagamos en las prácticas significantes de la derecha Argentina estudiando sus marcos de significado; y mediante herramientas que van desde el análisis del discurso y la imagen a la sociología. Abordamos el concepto de representaciones en un doble registro: en lo simbólico, como conjuntos de experiencias, y en el campo de la política, como ocupación en lugar de alguien más. Para pensar esto en la práctica, efectuamos un estudio preliminar sobre las representaciones que la Alianza Cambiemos hizo en 2015 de su candidata para la provincia de Buenos Aires.
Más allá de la automatización. Impacto de la Cuarta Revolución Industrial sobre las condiciones de trabajo y la cualificación
Authors: López Carmona José Luis
Published: January 2024

La actual digitalización de las empresas en el sector industrial genera un nuevo entorno digital que tiene efectos diversos sobre las condiciones de trabajo, representando un nuevo modelo de consumo y organización del factor humano en las fábricas y talleres. En este artículo se presentan una parte de los resultados obtenidos en una investigación de cinco años para medir y evaluar el impacto ocupacional de la industria 4.0. En concreto, se exponen los resultados relativos a la existencia de una serie de factores que, como resultado de la digitalización de las empresas, tienen capacidad para alterar las condiciones de trabajo en los diferentes empleos y ocupaciones.
Una conversación con Leopoldina Fortunati, autora de El Arcano de la Reproducción
Authors: Briales Álvaro
Published: January 2024

Transcribimos aquí una conversación con la socióloga italiana y militante feminista Leopoldina Fortunati, autora de El arcano de la reproducción: amas de casa, prostitutas, obreros y capital (1981), una de las obras que con mayor originalidad y profundidad usó las categorías de El Capital de Marx para conceptualizar y politizar el trabajo doméstico, sexual y de reproducción. Cuatro décadas después de su obra clásica, conversamos sobre la historia y el futuro de la crisis en la esfera de la reproducción, el reconocimiento y el rechazo feminista del trabajo doméstico, las transformaciones de las formas de familia o las demandas de Renta Básica y reducción de la jornada laboral.
“Molestia terrível, de mortalidade elevada, que deforma o indivíduo”
Authors: Soares Júnior Azemar dos Santos
Published: January 2024

Esse artigo tem por objetivo analisar os discursos escritos e publicados por médicos na imprensa sobre os surtos epidêmicos de varíola ocorridos na Paraíba nos primeiros anos do vigésimo século. A varíola era uma doença viral, de caráter epidêmico, e que constantemente batia a porta dosparaibanos e adentrava seus corpos deformando-os em pústulas purulentas e que em alguns casos, levava-os a morte. Para tanto, o governo tratou em investir em tímidas campanhas de vacinação contra a enfermidade. Metodologicamente, me utilizo a problematização das fontes históricas a partir da análise do discurso conforme propôs Michel Foucault (2010), me permitindo perceber a doença como um acontecimento e o discurso sobre a enfermidade como outro acontecimento. Esses enunciadosforam publicados na imprensa noticiosa d’A União, d’A Imprensa, da Revista do IHGP e da Revista Medicina.  Conclui-se que enquanto as informações médico-pedagógicas ficavam presas as páginas da imprensa, a população desassistida pipocava em bexigas.
"Menores degenerados”
Authors: Cunha Miranda Carlos Alberto , Santana Bezerra Rafael
Published: January 2024

O presente artigo tem o intuito de analisar os discursos psiquiátricos e as experiências de crianças e adolescentes internados no Hospital de Alienados do Recife, entre as décadas de 1920 e 1930, que foram enquadradas no diagnóstico: “episódio delirante dos degenerados”. O conceito de “degeneração” surgiu no campo psiquiátrico a partir da publicação do Tratié des Maladies Mentales (1857), do psiquiatra franco-austríaco Bénédict Augustin Morel. A “degeneração” seria uma espécie de desvio patológico do “tipo normal” da humanidade, e estaria, para o autor, na base de toda alienação. Centrada no organismo, a degeneração poderia ser fruto de diversas causas sociais e biológicas: miscigenação, uso de tóxicos, religiosidade, sexualidade etc. A partir de então, a psiquiatria clássica, inspirada nos alienistas franceses, seria ampliada para novos domínios e áreas de atuação. Assim, a psiquiatra atuaria não somente no corpo, dentro da instituição médica, mas também na sociedade, através da prevenção, da normatização e da regulamentação de comportamentos.
Movimentos extremistas nas escolas e a educação contra a barbárie
Authors: Gomide Ana Paula
Published: January 2024

Ultimamente, com o fortalecimento da extrema-direita no Brasil, frequentes manifestações antidemocráticas de jovens estudantes das escolas privadas têm preocupado educadores. Tendo em vista as condições objetivas favoráveis ao agravamento do “clima autoritário”, na sociedade, perguntamos: até que ponto as escolas, que deveriam prezar pela formação e resistência dos sujeitos contra a barbárie, ao se calcarem em um modelo de educação que prima pela competição, força e frieza, não estariam promovendo o seu contrário com o concomitante esvaziamento de espaços formativos emancipatórios? O objetivo é discutir os elementos envolvidos nestes fenômenos sociais irracionais _ as regressões psíquicas presentes nestes atos _, com base nos escritos de Adorno, Horkheimer e Marcuse acerca da sociedade administrada em suas dimensões psicossociais. Tais contradições têm incidências nas relações escolares e nas agendas educacionais pautadas na lógica da racionalidade tecnocrática que incentivam o autoritarismo.