Reclamation and sedimentation impacts around the Wairuhu River estuary, Poka-Galala threshold

Wairuhu River is disembogued on the sill of Poka-Galala, Ambon Bay. The estuary is affected by the coastal reclamation which led to the fester sedimentation. It triggers the problem of altering the shoreline and the dynamics of water movement, as well as the surrounding ecosystem. The modeling approach was applied to reconstruct the alterations around the estuary. The study aimed to estimate the changes on the shoreline, current patterns, and sediment transport patterns (suspended sediment), and to describe marine resources around the estuary of Wairuhu. MIKE 3 FM was utilized to reconstruct the pattern of flow and sediment transport changes, and coordinates plottings from satellite data were used to measure the coastline. The model was validated by using the data of tide and surface flow. The results showed the alteration pattern of the shoreline around the Wairuhu estuary occurred as a result of coastal reclamation. The flow validation (mooring and model) using RMSE was 0.38 which meant there was no difference between the model and mooring. By the model, the flow pattern that passed through the APG was following the tidal pattern. The changes in the tidal platform also occurred on the sediment transport pattern that formed the total distribution pattern of SSC (suspended sediment concentration). Several classes of macroflora and macrofauna were uncovered, such as Malacostraca, Echinoidea, Bivalvia, Asteroidea, Ophiuroidea, and Gastropoda.Keywords: Modeling; Poka-Galala sill; Sedimentation; Wairuhu Rive

PERSENTASE KARKAS DAN LEMAK ABDOMEN BROILER YANG MENGGUNAKAN DAUN MURBEI (Morus alba) SEGAR SEBAGAI PENGGANTI SEBAGIAN RANSUM BASAL

CARCASS PERCENTAGE AND ABDOMINAL FAT OF BROILER CHICKEN CONSUMING DIETS PARTLY REPLACED WITH FRESHMULBERRY (Morus alba) LEAVES. An experiment was conducted to elaborate carcass percentage and abdominal fat of broiler chicken consuming diets partly replaced with fresh Mulberry (Morus alba) leaves. The present study was conducted for 3 weeks using 60 day old chicks (DOC) CP 707 broiler chicks. Birds were placed in battery cages and were assigned to each dietary treatment (4 treatments) which was replicated five times in a completely randomized design (CRD) arrangement and data were all submitted to the ANOVA procedure.Treatment diets were formulated as follow: R0 = basal diet + 0% fresh Mulberry leaves; R1 = 98% basal diet + 2.0% fresh Mulberry leaves; R2= 96.0% basal diet + 4.0% fresh Mulberry leaves; and R3 = 94.0% basal diet + 6.0% fresh Mulberry leaves. Variables measured were carcass percentage and abdominal fat. Research results showed that treatments gave a non-significant different (P>0.05) on carcass percentage; where as treatments significantly (P<0,05) affected abdominal fat. R0 (basal diet + 0% fresh Mulberry leaves) gave a significantly (P < 0.05) higher abdominal fat compared with R1, R2, and R3 treatments; while among R1, R2, and R3 treatments gave a non-significant difference on abdominal fat indices. It can be concluded that fresh Mulberry (Morus alba) leaves can be used up to 6.0% as a replacement of basal diet of broiler chicken in this study. Key words: Broiler chicken, Mulberry leaves,carcass percentage, abdominal fat

Identifikasi Patahan Manado dengan Menggunakan Metode Geolistrik Konfigurasi Wenner di Kota Manado

IDENTIFIKASI PATAHAN MANADO DENGAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER DI KOTA MANADOABSTRAK Identifikasi keberadaan patahan Manado, Sulawesi Utara di Jalan Ringroad Kelurahan Malendeng Kecamatan Paaldua telah dilakukan penelitian menggunakan metode geolistrik tahanan jenis konfigurasi Wenner pada satu lokasi dengan dua lintasan pengukuran dengan panjang bentangan masing-masing 400 meter dengan spasi elektroda 20 meter. Data diolah dengan menggunakan software RES2DINV. Diperoleh hasil dari kedua lintasan dengan nilai resistivitas pada lintasan 1 bernilai (ρ < 311,5 Ωm) dan pada lintasan 2 nilai resistivitas bernilai (ρ < 98,8 Ωm). Nilai resistivitas dengan (ρ < 311,5 Ωm) pada lintasan 1, dan nilai resistivitas (ρ < 98,8 Ωm) pada lintasan 2 menunjukkan rekahan pada lintasan 1 terdapat pada titik bentangan ke 220-240 meter dengan kedalaman 37 meter dan terdapat pada titik ke 280-300 meter dengan kedalaman 15 meter. Sedangkan pada lintasan 2 rekahan terdapat pada titik ke 240-260 meter dengan kedalaman 15 meter. Kata Kunci : Patahan Manado, Metode geolistrik, Konfigurasi Wenner, Software RES2DINV. IDENTIFICATION OF MANADO FAULT BY USING GEOLECTRICAL METHOD RESISTIVITY CONFIGURATION OF WENNER AT MANADO ABSTRACT Identification of existence Manado fault, North Sulawesi at Ringroad Street, in Malendeng Village subdistrict Paaldua has been done research by using geoelectrical resistivity method configuration of Wenner in one located with measurement in two lines each others 400 meters in space electrode is 20 meters. Data processing is done by using RES2DINV software. resistivity value in the two lines show that for the first line (ρ 311,5 Ωm) and second line (ρ 98,8 Ωm). This resistivity in the first line (ρ 311,5 Ωm) and second line (ρ 98,8 Ωm) is founded already joint in first line at point 220-240 meters with depth is 37 meters and at point 280-300 meters with depth is 15 meters and second line position of joint stays at point 240-260 with depth is 15 meters

HUBUNGAN KELELAHAN KERJA DENGAN KECELAKAAN KERJA PADA PEKERJA DI PT. PERTAMINA GEOTHERMAL ENERGY AREA LAHENDONG KOTA TOMOHON

Kecelakaan kerja merupakan suatu peristiwa tidak diharapkan tetapi tidak terjadi kebetulan melainkan ada penyebabnya. Faktor yang menyebabkan kecelakaan kerja ada dua yaitu faktor manusia dan faktor lingkungan. Kelelahan merupakan salah satu faktor manusia penyebab kejadian kecelakaan kerja. Tujuan dilakukannya penelitian ini yakni untuk mengetahui hubungan kelelahan kerja dengan kecelakaan kerja pada pekerja di PT. Pertamina Geothermal Energy Area Lahendong. Jenis penelitian menggunakan survei analitik dengan desain cross sectional. Populasi dalam penelitian ini berjumlah 60 pekerja lapangan dari bagian HSSE, maintenance dan operation, dengan sampel ditentukan dengan menggunakan teknik total sampling. Penelitian ini dilaksanakan pada Juni - November 2022. Instrumen yang digunakan yaitu kuesioner kecelakaan kerja serta Kuesioner Alat Ukur Perasaan Kelelahan Kerja (KAUPK2). Analisis data menggunakan analisis univariat dan analisis bivariat. Hasil penelitian diperoleh dengan uji statistik yaitu nilai p = 0.348 (p &gt; 0.05), artinya kelelahan kerja tidak berhubungan dengan kecelakaan kerja pada pekerja di PT. Pertamina Geothermal Energy Area Lahendong Kota Tomohon. Hal ini karena faktor penyebab kecelakaan kerja di PT. Pertamina Geothermal Energy Area Lahendong bukan diakibatkan oleh kelelahan kerja melainkan dari faktor lain yaitu pekerja yang kurang hati-hati dan kurang teliti dalam bekerja, alat pelindung diri (APD) tidak digunakan saat bekerja serta kecelakaan yang disebabkan oleh mesin

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Cosmological solutions of massive gravity on de Sitter

In the framework of the recently proposed models of massive gravity, defined with respect to a de Sitter reference metric, we obtain new homogeneous and isotropic solutions for arbitrary cosmological matter and arbitrary spatial curvature. These solutions can be classified into three branches. In the first two, the massive gravity terms behave like a cosmological constant. In the third branch, the massive gravity effects can be described by a time evolving effective fluid with rather remarkable features, including the property to behave as a cosmological constant at late time.Comment: 6 pages, 1 figure; discussion extended, a few references added, improved analysis in Section

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