Two-dimensional readout of GEM detectors

The recently introduced Gas Electron Multiplier (GEM) permits the amplification of electrons released by ionizing radiation in a gas by factors approaching ten thousand, larger gains can be obtained combining two GEMs in cascade. We describe methods for implementing two- and three-dimensional projective localization of radiation, with sub-millimeter accuracy, making use of specially manufactured and patterned pick-up electrodes. Easy to implement and flexible in the choice of the readout geometry, the technology has the distinctive advantage of allowing all pick-up electrodes to be kept at ground potential, thus substantially improving the system simplicity and reliability. Preliminary results demonstrating the two-dimensional imaging capability of the devices are provided and discussed, as well as future perspectives of development

An insulating grid spacer for large-area MICROMEGAS chambers

We present an original design for large area gaseous detectors based on the MICROMEGAS technology. This technology incorporates an insulating grid, sandwiched between the micro-mesh and the anode-pad plane, which provides an uniform 200 $\mu$m amplification gap. The uniformity of the amplification gap thickness has been verified under several experimental conditions. The gain performances of the detector are presented and compared to the values obtained with detectors using cylindrical micro spacers. The new design presents several technical and financial advantages

Construction, test and commissioning of the triple-GEM tracking detector for COMPASS

The Small Area Tracking system of the COMPASS experiment at CERN includes a set of 20 large area, fast position-sensitive Gas Electron Multiplier (GEM) detectors, designed to reliably operate in the harsh radiation environment of the experiment. We describe in detail the design, choice of materials, assembly procedures and quality controls used to manufacture the devices. The test procedure in the laboratory, the performance in test beams and in the initial commissioning phase in the experiment are presented and discussed

STRUKTUR SOSIAL, STRATEGI NAFKAH, DAN TINGKAT KESEJAHTERAAN NELAYAN PASCA REKLAMASI TELUK JAKARTA

Reclamation can be a source of social changes in fishing communities. This study aims to analyze the social structure, strategies for earning a living, and the level of welfare of the fishing community in Cilincing Fishers’ Village, North Jakarta during the post-reclamation period. The research was conducted using both quantitative and qualitative methods. Quantitative data were obtained by distributing questionnaires and then processed using the Paired-Sample T-test and the Wilcoxon Signed Ranking Test. Qualitative data were obtained through in-depth interviews with informants. The results showed that the social structure of fishers in Cilincing remained the same before and after reclamation. In terms of the social associative process, there are significant differences between before and after reclamation. After-reclamation, there has been an increase in various togetherness activities such as cooperation, mutual assistance, and deliberation. In terms of livelihood strategies, some fishers have experienced changes after reclamation, for example by doing side jobs. From the welfare level, both catch and income experienced a significant decline. Keywords: fishers, livelihood strategy, reclamation, social structure, welfare

Pengaruh Persepsi Dukungan Organisasi untuk Mencapai Komitmen Profesional dengan Keterlibatan Karyawan Sebagai Mediator

Covid 19 menyebabkan organisasi khususnya di bidang kesehatan mengalami masa kritis yang dapat menurunkan motivasi kinerja seseorang, apabila tidak memperlakukan karyawan secara tepat maka akan timbul turnover yang tinggi karena menurunnya komitmen karyawan, padahal organisasi tersebut membutuhkan karyawan-karyawannya untuk bangkit bersama. Penelitian ini menguji pengaruh dari persepsi dukungan organisasi pada komitmen profesional melalui keterlibatan karyawan. Penelitian dilakukan di wilayah Jawa Timur dengan sasaran responden ahli di bidang kesehatan yaitu dokter, perawat, bidan dan apoteker. Responden yang terkumpul adalah 135 orang dengan metode purposive sampling. Semua variabel pengukuran menggunakan skala likert 5 poin yang melalui proses pengecekan validitas dan reliabilitas. Analisis penelitian yang dipilih adalah PLS-SEM. Hasil penelitian mengungkapkan bahwa konstruk yang dibangun telah valid dan reliabel sehingga dapat dilanjutkan dengan pengujian hipotesis yang membuktikan adanya pengaruh positif signifikan antara persepsi dukungan organisasi dengan keterlibatan karyawan, keterlibatan karyawan berpengaruh positif signifikan terhadap komitmen profesional, serta pengaruh positif secara signifikan mengenai persepsi dukungan organisasi terhadap komitmen profesional sehingga keterlibatan karyawan dapat memenuhi syarat sebagai mediator. Penelitian ini menghasilkan suatu ide strategi untuk pencapaian komitmen profesional, terutama organisasi di bidang kesehatan yang mempekerjakan tenaga profesional, namun penelitian ini masih mempunyai keterbatasan yaitu cangkupan bidang yang berfokus pada kesehatan, jumlah sampel, serta cangkupan wilayah

Pengaruh Sedimentasi terhadap Tutupan Terumbu Karang di Perairan Arfai, Manokwari Indonesia

Sedimentation adversely affects corals by impeding recruitment, hindering growth, and inducing stress, ultimately leading to degradation. This study aims to ascertain the correlation between sedimentation and coral cover. Five stations were sampled in Arfai waters in May 2023, with sedimentation rates measured using traps over 14 days. Coral reef conditions were assessed via the Point Intercept Transect (PIT) method, revealing a 'good' coral cover of 51%, dominated by Acropora submassive (ACS), Acropora branching (ACB), and Coral branching (CB). Sedimentation rates ranged from 6.26 to 33.92 mg/cm²/day, with impacts categorized from mild to moderate and moderate to heavy. Analysis confirms sedimentation's influence on coral reef life. Despite its significance for management strategies, long-term studies tracking coral reef structure and function in response to sediment influx are lacking. Further research on coral reef recovery post-sediment exposure is imperative.  Sedimentasi memengaruhi karang dengan menghambat rekruitmen, menghambat pertumbuhan, dan menyebabkan stres, yang akhirnya menyebabkan degradasi. Studi ini bertujuan untuk mengetahui hubungan antara sedimentasi dan tutupan karang. Lima stasiun diambil sampelnya di perairan Arfai pada Mei 2023, dengan tingkat sedimentasi diukur menggunakan perangkap selama 14 hari. Kondisi terumbu karang dinilai melalui metode Point Intercept Transect (PIT), yang mengungkapkan tutupan karang 'baik' sebesar 51%, didominasi oleh Acropora submassive (ACS), Acropora branching (ACB), dan Coral branching (CB). Tingkat sedimentasi berkisar dari 6,26 hingga 33,92 mg/cm²/hari, dengan dampak yang dikategorikan dari ringan hingga sedang dan sedang hingga berat. Analisis menegaskan pengaruh sedimentasi terhadap kehidupan terumbu karang. Meskipun penting untuk strategi pengelolaan, studi jangka panjang yang melacak struktur dan fungsi terumbu karang dalam menanggapi masukan sedimen masih kurang. Penelitian lebih lanjut tentang pemulihan terumbu karang setelah paparan sedimen sangat penting

Risk factors for hemorrhagic cystitis after allogeneic hematopoietic stem cell transplantation in a letermovir-exposed CMV-free population receiving PTCy

Hemorrhagic cystitis (HC) is a highly impacting complication in allogeneic hematopoietic stem cell transplantation (HSCT), occurring in 12%–37% of patients. The impact of transplant- and patient-specific variables has been described, with a possible role for JCV and BKV, which may be cooperating with cytomegalovirus (CMV). Here, we analyze 134 letermovir-exposed, CMV-free patients, treated with the same cyclophosphamide-based graft-versus-host disease (GVHD) prophylaxis, describing risk factors for HC. The overall incidence of HC was 23%. Patients with HLA mismatched transplant, higher comorbidity score, and receiving three alkylating agents with TBF (thiotepa, busulfan, and fludarabine) conditioning regimen had a higher risk of HC in multivariate analysis (OR: 4.48, 6.32, and 1.32, respectively). A HC-score including male gender, TBF conditioning, and HLA-mismatch stratifies the risk of HC in the first 100 days after HSCT. The role of BKV and JCV was not highly impacting in those patients, suggesting a possible synergistic effect between CMV and JCV in causing HC. HC can be interpreted as the combination of patient-related factors, chemotherapy-related toxicities—especially due to alkylating agents—and immunological elements

Recognizing People by Body Shape Using Deep Networks of Images and Words

Common and important applications of person identification occur at distances and viewpoints in which the face is not visible or is not sufficiently resolved to be useful. We examine body shape as a biometric across distance and viewpoint variation. We propose an approach that combines standard object classification networks with representations based on linguistic (word-based) descriptions of bodies. Algorithms with and without linguistic training were compared on their ability to identify people from body shape in images captured across a large range of distances/views (close-range, 100m, 200m, 270m, 300m, 370m, 400m, 490m, 500m, 600m, and at elevated pitch in images taken by an unmanned aerial vehicle [UAV]). Accuracy, as measured by identity-match ranking and false accept errors in an open-set test, was surprisingly good. For identity-ranking, linguistic models were more accurate for close-range images, whereas non-linguistic models fared better at intermediary distances. Fusion of the linguistic and non-linguistic embeddings improved performance at all, but the farthest distance. Although the non-linguistic model yielded fewer false accepts at all distances, fusion of the linguistic and non-linguistic models decreased false accepts for all, but the UAV images. We conclude that linguistic and non-linguistic representations of body shape can offer complementary identity information for bodies that can improve identification in applications of interest.Comment: 9 pages, 5 figures, 4 table