Penerapan Teknologi Pembuatan Kompos Bagi Kelombok Petani Kopi Arabika di Kelurahan Kisanata

Program Pemberdayaan Masyarakat kelurahan Kisanata, kecamatan Bajawa dalam memanfaatkan limbah pertanian seperti daun-daun, ranting-ranting kayu, dan rumput dengan komposisi 30% hijauan dan 60 % bahan coklat serta 10 % komponen lain untuk pembuatan pupuk kompos. Sasaran utama program ini adalah masyarakat kelurahan Kisanata dan sekitarnya khususnya petani kopi Arabika Flores Bajawa. Pada kegiatan ini diharapkan masyarakat tersebut dapat memahami dan terampil membuat pupuk dari hijauan dan bokashi yang bernilai ekonomis dari bahan limbah pertanian. Hal ini tentu sangat membantu masyarakat petani dalam meningkatkan produktifitas pertanian sekaligus kesejahteraan mereka. Tujuan dari kegiatan ini yaitu untuk meningkatkan peran masyarakat dalam melestarikan lingkungan hidup sebagai jasa ekologi dan bernilai ekonomi. Metode yang diterapkan dalam kegiatan ini yaitu mencakup pada perspektif action research dengan manfaat yang ingin dicapai yakni perbaikan dan peningkatan pemahaman terhadap proses pembuatan pupuk kompos. Hasil kegiatan yaitu meningkatkan pengetahuan dan keterampilan petani dalam proses pupuk organik dari limbah pertanian yang banyak terdapat di lingkungan sekitarnya

Pengujian Performa Pompa Air DAB Tipe DB-125B Sebagai Turbin

A centrifugal pump is a pump that moves fluid by utilizing the centrifugal force generated by the rotation of the impeller. All rotodynamic pumps from radial flow type to axial flow can function as turbines. The research was conducted through experiments on the pump that functions as a turbine in this study is a regenerative pump or peripheral pump, namely water pump DAB type DB-125B. Peripheral pump is a centrifugal pump whose impeller has radial spoons in a total of 41 spoons. The results showed the best performance or performance of PAT regenerative pump system or peripheral pump, namely water pump DAB type DB-125B as a hydro power plant with flow discharge variation of 35 ltr/min, 40 ltr/min, and 45 ltr/min at constant head (8 m) is with a maximum efficiency of 15.81% at a flow discharge of 40 ltr/min and shaft rotation of 850.3 rpm. Maximum PAT output power also occurs at a flow discharge of 40 ltr/min with a turbine rotation of 985.1 rpm of 5.849 W. The addition of water power can directly increase the rotation of the PAT shaft, as well as the addition of flow discharge at a constant head (8 m), rotation the turbine rotor is also increased. Whereas the addition of flow discharge with a constant head, the output power and maximum PAT efficiency tend to occur at high rotation

Long-term kidney function recovery and mortality after COVID-19-associated acute kidney injury: An international multi-centre observational cohort study

Background: While acute kidney injury (AKI) is a common complication in COVID-19, data on post-AKI kidney function recovery and the clinical factors associated with poor kidney function recovery is lacking. Methods: A retrospective multi-centre observational cohort study comprising 12,891 hospitalized patients aged 18 years or older with a diagnosis of SARS-CoV-2 infection confirmed by polymerase chain reaction from 1 January 2020 to 10 September 2020, and with at least one serum creatinine value 1–365 days prior to admission. Mortality and serum creatinine values were obtained up to 10 September 2021. Findings: Advanced age (HR 2.77, 95%CI 2.53–3.04, p < 0.0001), severe COVID-19 (HR 2.91, 95%CI 2.03–4.17, p < 0.0001), severe AKI (KDIGO stage 3: HR 4.22, 95%CI 3.55–5.00, p < 0.0001), and ischemic heart disease (HR 1.26, 95%CI 1.14–1.39, p < 0.0001) were associated with worse mortality outcomes. AKI severity (KDIGO stage 3: HR 0.41, 95%CI 0.37–0.46, p < 0.0001) was associated with worse kidney function recovery, whereas remdesivir use (HR 1.34, 95%CI 1.17–1.54, p < 0.0001) was associated with better kidney function recovery. In a subset of patients without chronic kidney disease, advanced age (HR 1.38, 95%CI 1.20–1.58, p < 0.0001), male sex (HR 1.67, 95%CI 1.45–1.93, p < 0.0001), severe AKI (KDIGO stage 3: HR 11.68, 95%CI 9.80–13.91, p < 0.0001), and hypertension (HR 1.22, 95%CI 1.10–1.36, p = 0.0002) were associated with post-AKI kidney function impairment. Furthermore, patients with COVID-19-associated AKI had significant and persistent elevations of baseline serum creatinine 125% or more at 180 days (RR 1.49, 95%CI 1.32–1.67) and 365 days (RR 1.54, 95%CI 1.21–1.96) compared to COVID-19 patients with no AKI. Interpretation: COVID-19-associated AKI was associated with higher mortality, and severe COVID-19-associated AKI was associated with worse long-term post-AKI kidney function recovery. Funding: Authors are supported by various funders, with full details stated in the acknowledgement section

High Temperature Stability and Performance Analysis of N-doped Ge-Se-Sb based OTS Selector Devices

International audienceIn this paper, we investigate the stability at high temperature of N-doped Ge-Se-Sb based Ovonic Threshold Switching selectors (OTS). Annealing temperatures up to 400°C are explored, compatible with IC Back-End-Of-Line temperature budget (BEOL). Thanks to electrical characterization and material physico-chemical analysis, we show how an annealing of 30 minutes at 400°C is beneficial for the reduction of the threshold voltage. Moreover, after such thermal budget, an ultra-low leakage current of 0.1 nA at V$_{th}$/2 and an endurance of more than 10$^8$ cycles are still ensured. Electrical parameters and selector performance are then analyzed at stress temperatures up to 150°C, demonstrating the suitability of Ge-Se-Sb based OTS selector devices for BEOL integrations for applications targeting high temperature operating environments