bluuebunny/crossref_metadata_2025 huggingface dataset:
The Frictional-Viscous Transition in Experimentally Deformed Granitoid Fault Gouge
Authors: Zhan Weijia , Niemeijer André , Berger Alfons , Nevskaya Natalia , Spiers Christopher James , Herwegh Marco
Published: February 2024

In crustal faults dominated by granitoid gouges, the frictional-viscous
transition marks a significant change in strength constraining the lower
depth limit of the seismogenic zone. Dissolution-precipitation creep
(DPC) may play an important role in initiating this transition,
especially within polymineralic materials. Yet, it remains unclear to
what extent DPC contributes to the weakening of granitoid gouge
materials at the transition. Here we conducted sliding experiments on
wet granitoid gouges to large displacement (15 mm), at an effective
normal stress and pore fluid pressure of 100 MPa, at temperatures of
20-650°C, and at sliding velocities of 0.1-100 μm/s, which are relevant
for earthquake nucleation. Gouge shear strengths were generally
~75 MPa even at temperatures up to 650°C and at
velocities > 1 mm/s. At velocities ≤ 1 mm/s, strengths
decreased at temperatures ≥ 450°C, reaching a minimum of 37 MPa at the
highest temperature and lowest velocity condition. Microstructural
observations showed that, as the gouges weakened, the strain localized
into thin, dense, and ultrafine-grained (≤ 1 μm) principal slip zones,
where nanopores were located along grain contacts and contained minute
biotite-quartz-feldspar precipitates. Though poorly constrained, the
stress sensitivity exponent n decreased from ≥17 at 20°C to
~2 at 650°C at the lowest velocities. These findings
suggest that high temperature, slow velocity and/or small grain sizes
promote DPC-accommodated granular flow over cataclastic frictional
granular flow, leading to the observed weakening and strain
localization. Field observations together with extrapolation suggest
that DPC-induced weakening occurs at depths of 7-20 km depending on
geothermal gradient.
High resolution variability of the ocean carbon sink
Authors: Gregor Luke , Shutler Jamie , Gruber Nicolas
Published: February 2024

Measurements of the surface ocean fugacity of carbon dioxide (fCO2)
provide an important constraint on the global ocean carbon sink, yet the
gap filling products developed so far to cope with the sparse
observations are relatively coarse (1°x1° by 1 month). Here, we overcome
this limitation by using the newly developed surface Ocean Carbon
dioxide Neural Network (OceanCarbNN) method to estimate surface ocean
fCO2 and the associated air sea CO2 fluxes (FCO2) at a resolution of
8-daily by 0.25°x0.25° (8D) over the period 1982 through 2022. The
method reconstructs fCO2 with accuracy like that of low-resolution
methods (~19 µatm) but improves it in the coastal ocean.
Although global ocean CO2 uptake differs little, the 8D product captures
15\% more variance in FCO2. Most of this increase comes
from the better-represented subseasonal scale variability, which is
largely driven by the better resolved variability of the winds, but also
contributed to by the better resolved fCO2. The high-resolution fCO2 is
also able to capture the signal of short-lived regional events such as
coastal upwelling and hurricanes. For example, the 8D product reveals
that fCO2 was at least 25 µatm lower in the wake of Hurricane Maria
(2017), the result of a complex interplay between the decrease in
temperature, the entrainment of carbon-rich waters, and an increase in
primary production. By providing new insights into the role of higher
frequency variations of the ocean carbon sink and the underlying
processes, the 8D product fills an important gap.
Equation of State of White Dwarfs and Mass-Radius Estimation in the Newtonian Limit
Authors: Raza Tousif , Tousif Reza
Published: February 2024

White Dwarf stars are one of the densest form of matter following neutron star and black holes. A typical White Dwarf is as massive as our Sun has radius comparable to the Earth. This paper reviewed the Fermi gas model Equation of State of White Dwarf and numerical computation of Mass-radius and pressure density profile. A section in brief has been included for the calculation of average speed of electrons in the White Dwarf environment.
Numerical Simulation of Tornado-like Vortices Induced by Small-Scale Cyclostrophic Wind Perturbations
Authors: Liu Yuhan , Jiang Yongqiang , Chen Chaohui , Zhang Yun , He Hongrang , Chen Xiong , Zhong ruilin
Published: February 2024

This study introduces a tornado perturbation model utilizing the
cyclostrophic wind model, implemented through a shallow-water equation
framework. We conducted numerical simulations to examine development of
perturbations within a static atmosphere background. Four numerical
experiments were conducted: a single cyclonic wind perturbation (EXP1),
a single low-geopotential height perturbation (EXP2), a cyclonic wind
perturbation with a 0 Coriolis parameter (EXP3), and a single
anticyclonic wind perturbation (EXP4). The outputs of these experiments
were analyzed using comparative methods. In a static atmosphere setting,
EXP1 generated a tornado-like pressure structure under a small-scale
cyclonic wind perturbation. The centrifugal force in the central area
exceeded the pressure gradient force, causing air particles to flow
outward, leading to a pressure drop and strong pressure gradient. EXP2
induced a purely radial wind field; upon initiation, the central area
exhibited convergence, and the geopotential height increased rapidly,
indicating that a small-scale depression is insufficient to generate a
tornado’s vortex flow field. EXP3’s results, with a 0 Coriolis
parameter, are marginally different from EXP1, suggesting the Coriolis
force’s negligible impact on small-scale movements. EXP4 demonstrates
that a small-scale anticyclonic wind field perturbation can also trigger
tornado-like phenomena akin to EXP1. The results indicate that a robust
cyclonic and an anticyclonic wind field can potentially generate a pair
of cyclonic and anticyclonic tornadoes, when the horizontal vortex tubes
in an atmosphere with strong vertical wind shear tilt, forming a pair of
positive and negative vorticities. These tornadoes are similar but have
different rotation directions.
Improving Deep Learning Methods for Robust Methane Plume Detection using Alternative Input Representations
Authors: Satish Anagha , Bue Brian , Lee Jake , Thorpe Andrew , Cusworth Daniel , Ayasse Alana , Duren Riley
Published: February 2024

Methane (CH4) is a prominent greenhouse gas responsible for about 20%
of all atmospheric radiative forcing. As we notice trends in increasing
global temperatures, understanding and detecting these emissions has
become increasingly important. This requires the creation of robust
greenhouse gas plume detectors. Previous work at the NASA Jet Propulsion
Laboratory has shown Convolutional Neural Networks (CNN) to be an
appropriate solution to map methane sources from future imaging
spectrometer missions, such as Carbon Mapper. However, current models
suffer from a high rate of false positives due to false enhancements in
the detected images.

We have compiled datasets from two Airborne Visible/Infrared Imaging
Spectrometer Next Generation (AVIRIS-NG) California campaigns. We then
trained a GoogleNet CNN Classifier model on each campaign. The baseline
current model uses a Unimodal column-wise matched filter (CMF). This
results in a model known to be sensitive to false enhancements, such as
water/water vapor, bright/dark surfaces, or confuser materials with
similar absorption wavelengths to methane. We first note improvements
between the Unimodal CMF model and a new Surface-Controlled CMF model,
whose dataset matches that of the Unimodal CMF model, but removes
enhancements not matching the absorption wavelength of methane. From
this, we note minimal improvement (1% increase in F1 score). We then
experiment with various auxiliary products measuring albedo (rgbmu,
SWALB), vegetation (NDVI, ENDVI), and water (h2o, NDWI) indices designed
to combat issues known to produce false enhancements. After training on
these new input representations for both campaigns, we noticed a
significant improvement in the multi-channel model’s results. We observe
an increase in the F1 score for classifying positive tiles from 0.78 to
0.86 when trained using auxiliary albedo indices, showing promise for
future use of auxiliary products in improving methane plume detectors.
An application of gabions for design of coastal protection structures in lakes
Authors: Raimondas Šadzevičius  , Dainius Ramukevičius  , Raimundas Baublys  , Wojciech Sas  , Andrzej Głuchowski  , Luiza Rzepczyńska  , Kamil Zając
Published: February 2024

With large areas of water reservoirs and lakes, the wave runoff distance is also large, resulting in the high waves in the wind blow direction. These waves intensively disrupt the coast of the lake or water reservoir. Another intense factor of coastal erosion is ice. A lot of engineering measures for the coastal protection of reservoirs and especially for lakes are used: reinforced concrete slabs, blocks, jibs, cellular systems (geosynthetics), etc. An eroded coastline, reshaped by installing a coastal protection structure using gabion construction, is analysed in this research. Gabions are designed to protect banks and slopes from fast water flow (water speed over 5 m·s–1) and ice impacts. They are designed according to geotechnical principles, assessing stability according to the limit design situations specified in Eurocode 7 (EN 1997-1). The aim of this work is to illustrate the features of wave and ice loads and geotechnical design situations evaluated in the design of a coastal protection structure made of gabions.
Challenges in therapy of severe COVID-19 pneumonia with giant pneumatocele in a preterm newborn: How to optimize mechanical ventilation?
Authors: Rsovac Snezana , Cobeljic Mina , Vukasinovic Nadja , Milosevic Katarina
Published: February 2024

Introduction. Coronavirus disease 2019 (COVID-19) pneumonia is a potentially life-threatening condition that can require the use of mechanical ventilation (MV) and is rare in the neonatal population. Giant pneumatocele is an extremely rare complication of MV, which is practically unknown in neonates. Case report. We report a case of a two-week-old premature infant who developed severe acute respiratory distress syndrome (ARDS) due to COVID-19 and pneumatocele as a complication of MV. The newborn was admitted in a life-threatening condition with persistent hypercapnia, which, therefore, required pro-longed MV. Chest computed tomography (CT) was done to assess the degree of fibrosis caused by COVID-19, and as an accidental finding, a pneumatocele was observed. The patient was immediately started on high-frequency oscillatory ventilation as a way of conservative treatment. After prolonged duration and gradual separation from MV, the patient was extubated, and oxygen therapy was gradually discontinued. The patient was discharged in good condition, and the follow-up chest CT showed complete regression of pneumatocele. Conclusion. Optimization of MV parameters and adequate treatment of complications such as ARDS or giant pneumatocele in neonates is an area that still requires further research, primarily due to the specificity of the neonatal age compared to adult patients.
Pain Management during Pregnancy and Lactation
Authors: Haider Rehan
Published: February 2024

Pregnancy and lactation are important stages in a woman’s existence, and pain management becomes a difficult problem at some point. The well-being of each mother and the growing fetus or breastfeeding toddler must be cautiously considered when selecting appropriate pain management techniques. This abstract evaluates modern knowledge and guidelines for pain control during pregnancy and lactation, focusing on the dangers and advantages of numerous pharmacological and nonpharmacological interventions. During pregnancy, women usually experience physiological changes that may exacerbate their current pain conditions or result in new ones. The use of certain pain medications, especially non-steroidal anti-inflammatory capsules (NSAIDs) and opioids has been linked to potentially destructive effects on fetal development. Consequently, healthcare providers often choose non-pharmacological interventions, including physical therapy, acupuncture, and relaxation techniques, as first-line remedies. Furthermore, a thorough evaluation of the risk-to-benefit ratio is essential when considering the use of any medication throughout pregnancy, and a session with a healthcare expert is important. During the lactation period, the ability to transfer medication through breast milk to infants raises issues regarding the protection of medications used for pain management. Healthcare companies have to remember the drug’s pharmacokinetics, its potential effect on the little one’s health, and the mother’s potential to care for the infant while on medicine. Opioid use at some point during breastfeeding is a concern because of the hazards of sedation, respiratory despair, and withdrawal signs inside the infant. In comparison, a few medicines are considered, especially those that are safe throughout lactation, and alternative non-pharmacological interventions have to be explored where possible. An interdisciplinary approach involving obstetricians, anesthesiologists, pediatricians, and lactation consultants is essential for developing comprehensive pain control plans during pregnancy and lactation. Alternatively, pain relief for the mother is critical to ensuring her well-being and a successful bond with the little one. Concurrently, minimizing any capacity risk to the fetus or breastfeeding infants is of maximum significance. Moreover, affected person education and shared selection-making play a critical role in supporting ladies to make informed choices about pain management strategies that stabilize their pain alleviation wishes and the safety of their unborn or breastfeeding child.
PENGARUH JENIS PENGAWET DAN LAMA PENYIMPANAN STEK RUMPUT PAKCHONG TERHADAP KUALITAS FISIK STEK, PENYUSUTAN BOBOT STEK DAN DAYA TUMBUH
Authors: Fitriani Fitriani , Erwanto Erwanto , Liman Liman , Muhtarudin Muhtarudin
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh jenis pengawet dan lama penyimpanan stek rumput pakchong terhadap kualitas fisik stek, penyusutan bobot stek, dan daya tumbuh. Penelitian ini dilaksanakan pada November 2022- Januari 2023, di Lahan Laboratorium Lapang Terpadu, Fakultas Pertanian, Universitas Lampung. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) pola faktorial 4x4. Perlakuan faktor P terdiri dari P0 (Tanpa perlakuan). P1 (Penyimpanan stek dengan pelilinan), P2 (Penyimpanan stek dengan silica gel), P3 (Penyimpanan stek dengan vakum) dan Faktor L terdiri dari L0 (Lama penyimpanan 0 hari), L1 (Lama penyimpanan 7 hari), L2 (Lama penyimpanan 14 hari), L3 (Lama penyimpanan 21 hari). Data yang diperoleh dianalisis sidik ragam dan dilanjutkan dengan Uji Lanjut Beda Nyata terkecil (BNt) pada taraf 5%. Berdasarkan uji lanjut BNt 5% yang dilakukan terdapat interaksi yang berpengaruh nyata antara perlakuan dengan lama penyimpanan terhadap penyusutan bobot stek dan daya tumbuh stek. Pada penyusutan bobot stek tertinggi terdapat pada perlakuan P2L2 penggunaan silica gel dengan lama penyimpanan 2 minggu, sedangkan pada daya tumbuh terdapat pada perlakuan P1L2 (pencelupan lili pada penyimpanan 2 minggu). Hasil penelitian menunjukkan bahwa perlakuan pemberian pengawet dan lama simpan berpengaruh nyata terhadap kualitas fisik, penyusutan bobot stek, dan daya tumbuh.
INKORPORASI PRODUK SUPLEMEN MULTI NUTRIEN SAOS KE DALAM KONSENTRAT SAPI POTONG DAN PENGARUHNYA TERHADAP KECERNAAN BAHAN KERING DAN KECERNAAN BAHAN ORGANIK RANSUM
Authors: Sari Rizka Novita , Erwanto Erwanto , Liman Liman , Muhtarudin Muhtarudin
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan Multi nutrien saos (MNS) pada ransum terhadap kecernaan bahan kering dan kecernaan bahan organik pada sapi. Penelitian ini dilaksanakan pada bulan September--November 2022 di Desa Negeri Katon, Kabupaten Pesawaran, Provinsi Lampung. Analisis dilaksanakan di Laboratorium Nutrisi dan Makanan Ternak, Jurusan Peternakan, Fakultas Pertanian, Universitas Lampung. Penelitian inimenggunakan Rancangan Acak Kelompok (RAK) dengan 2 perlakuan dan 8 ulangan menggunakan 16 sapi. Rancangan perlakuannya adalah R1: Ransum Grumi Feed A 50% + Hijauan 50% dan R2: R1 +MNS 6,45 %. Data dari hasil penelitian dianalisis dengan analisis Uji T. Hasil penelitian menunjukkan penambahan MNS tidak berpengaruh nyata. Hasil penelitian menunjukan bahwa pemberian MNS 6,45% tidak mempengaruhi KCBK dan KCBO. Rataan KCBK pada R1 adalah 69,23%+4,27%; dan R2 70,96%+2,34%. Sedangkan KCBO masing-masing adalah R1 68,84%+4,15%; dan R2 71,44%+2,65%. Rataan KCBO pada R2 71,44%+2,65%. Lebih tinggi dari R1 68,84%+4,15%.
Enhancing Arabic Speaking Skills: A Societal Approach at an Indonesian Islamic Boarding School University - Implementation Challenges and Remedies
Authors: Mahfuz Rizqi Mubarak  , Audina Noor Amalina , Muhammad Bimaghfirlana
Published: February 2024

The research explores the implementation of teaching speaking skills to first-semester Arabic language students at the University of Islamic Boarding School in Indonesia, using a social approach. It aims to comprehensively describe the process, covering objectives, the roles of lecturers and students, discussion themes, teaching methods, media, and evaluation. The study employs a descriptive qualitative method with data collected through observation, interviews, and documentation. Insights from the findings highlight the sociological perspective of learning objectives, emphasizing the lecturer's role in fostering social interactions through discussions. Both the lecturer and students' roles are examined in a societal context, underlining the lecturer's societal responsibilities and students' readiness for societal engagement. Discussion themes include social elements such as good behavior, Islamic education, and youth. The teaching method involves a conversational approach with cooperative learning strategies. Classroom media is limited to books and boards, while dormitories are equipped with LED TVs broadcasting Arabic-language religious speeches. Challenges faced by students are categorized into internal (lack of personal motivation) and external problems (shortage of classrooms and inadequate bathroom facilities). The study provides insights into the practical and sociological aspects of teaching speaking skills in an Islamic educational environment.
AKTIVITAS ANTIOKSIDAN EKSTRAK ETIL ASETAT BERBAGAI BAGIAN TANAMAN KESAMBI (Schleichera oleosa L.) DENGAN METODE DPPH
Authors: Nursamsiar Nursamsiar
Published: February 2024

Kesambi (Schleichera oleosa) merupakan salah tanaman asli Indonesia yang berpotensi sebagai obat dan memiliki senyawa aktif yang berpotensi sebagai antioksidan. Penelitian ini bertujuan untuk mengetahui potensi berbagai bagian tanaman sebagai antioksidan dengan metode DPPH. Simplisia diekstraksi dengan metode maserasi menggunakan pelarut etil astetat. Identifikasi golongan senyawa dilakukan dengan skrining fitokimia menggunakan reagen kimia sedangkan pengujian aktivitas antioksidan dilakukan dengan metode peredaman radikal DPPH menggunakan spektrofotometer pada Panjang gelombang 515 nm. Hasil skrining fitokimia menunjukkan bahwa semua ekstrak etil asetat dari berbagai bagian tanaman mengandung senyawa flavonoid, fenolik dan tannin. Pengujian aktivitas menunjukkan ekstrak etil asetat daun kesambi memiliki aktivitas antioksidan paling baik dengan nilai IC50 5,4952 μg/mL, dibandingkan dengan kulit batang (14,3621 μg/mL), akar (43,4159 μg/mL), kulit buah (159,8782 μg/mL) dan daging buah (167,2912 μg/mL). Ekstrak etil asetat berbagai bagian tanaman kesambi memiliki aktivitas antioksidan dengan urutan paling baik daun> kulit batang > akar > kulit buah > daging buah. Adanya profil bioaktivitas tersebut dapat memberikan gambaran terhadap kekuatan atioksidan pada berbagai bagian tanaman kesambi sehingga dapat dikembangkan untuk penelitian lebih lanjut.
POTENTIAL OF RED BETEL LEAVES (Piper crocatum) AS TYROSINASE INHIBITOR IN SILICO AND IN VITRO
Authors: Safithri Mega
Published: February 2024

Melasma adalah kelainan pigmentasi yang diakibatkan sintesis melanin berlebih berupa bercak cokelat disekitar wajah atau leher. Melasma dapat mengenai semua kelompok ras, terutama daerah dengan radiasi ultraviolet tinggi seperti suku Hispanik/Latin dan Asia. Zat yang sering digunakan untuk mencegah hiperpigmentasi adalah asam kojat, asam azelat dan merkuri, akan tetapi zat tersebut bersifat karsinogen jika digunakan terus menerus. Sirih merah (Piper crocatum) memiliki senyawa aktif yang berperan sebagai antioksidan seperti flavonoid dan fenol. Penelitian ini bertujuan untuk mengetahui potensi senyawa aktif daun sirih merah terhadap penghambatan tirosinase. Penelitian ini dilakukan dengan metode in silico dan in vitro. Reseptor yang digunakan adalah tirosinase dengan kode PDB 5M8O, tropolon sebagai native ligand, dan asam kojat sebagai ligan pembanding. Sebanyak 34 senyawa aktif daun sirih merah hasil analisis LC-MS dan GC-MS.digunakan sebagai ligan uji. Penambatan molekuler dilakukan dengan menggunakan AutoDock Vina dan AutoDock Tools, serta divisualisasikan menggunakan Ligplot+ dan PyMOL. Penghambatan tirosinase secara in vitro menggunakan kit tyrosinase activity assay ab252899 dan asam kojat sebagai kontrol positif. Senyawa katekin memiliki energi bebas pengikatan (ΔG) terkecil, yaitu −6.7 kkal/mol, dan kinetika inhibisi sebesar 12.12 µM. Hasil pengujian in vitro, fraksi air memiliki aktivitas inhibisi tirosinase terbesar yaitu 84.84% dan asam kojat memiliki aktivitas sebesar 82.47%.
Culture on the move
Authors: Lindberg Ylva , Wärnsby Anna , Nordenstam Anna , Persson Magnus
Published: February 2024

Nowadays, transformations of cultures and languages are increasingly noticeable due to heightened international mobility and intensified global communication and information flows. How such transformations play out and are met in Swedish education is a pressing topic to address to ensure relevant and inclusive quality education for all. The theme of this special issue, Culture on the Move, foregrounds language and literature both as pedagogical tools and disciplinary fields necessary for learning to live and work in a culturally diverse world. The contributions stem from the initial activities within the graduate school “Culturally Empowering Education through Language and Literature” (CuEEd-LL). Centre-staging teaching and learning in Swedish education, the articles in this issue present a range of inroads into how language and literature can be used to support cultural diversity among pupils, students and teachers since cultural diversity is steadily gaining attention both as a resource and a challenge in education and society.
MEMBANGUN LOYALITAS PADA KEDAI TEH: PERAN BRAND EXPERIENCE PADA BRAND LOVE
Authors: Octavia Yolanda , Tjokrosaputro Miharni
Published: February 2024

Generasi Z yang terus mengikuti perkembangan tren saat ini telah menciptakan peluang bisnis baru, termasuk di dalamnya bisnis kedai teh. Tujuan dari penelitian ini adalah untuk menginvestigasi pengaruh pengalaman merek (Brand Experience - BE) dan kasih sayang terhadap merek (Brand Love - BL) terhadap loyalitas merek (Brand Loyalty - L) pada minuman teh siap saji yang sedang booming saat ini. Selain itu, penelitian ini juga akan mengeksplorasi peran brand love sebagai perantara antara pengalaman merek dan loyalitas merek terhadap minuman teh tersebut. Subjek penelitian ini adalah konsumen minuman teh yang berdomisili di Jakarta. Dari total 270 responden, 232 orang di antaranya memenuhi kriteria sebagai responden. Penelitian ini mengadopsi metode purposive sampling dengan menyebarkan kuesioner secara daring, dan data dianalisis menggunakan SmartPLS-SEM. Hasil penelitian ini menunjukkan bahwa brand experience memiliki dampak positif pada brand love dan brand loyalty. Selain itu, brand love juga memiliki dampak positif pada brand loyalty. Terlebih lagi, BE juga memiliki dampak positif pada brand loyalty melalui perantaraan brand love sebagai mediator. Penelitian ini diharapkan memberi kontribusi secara akademis dan industri tentang pentingnya BE dalam membangun loyalitas merek dengan BL sebagai variabel mediasi.
 
The millennial generation, characterized by their inclination to embrace current trends, has contributed to numerous new ventures, including the tea house industry. This research seeks to examine the impact of brand experience (BE) and brand love (BL) on brand loyalty (L) within the thriving ready-to-drink tea sector. Furthermore, this study explores the role of brand love as an intermediary between brand experience and brand loyalty for these beverages. The research's target population comprises tea consumers residing in Jakarta. Of a total of 270 respondents, 232 met the criteria as respondents. This study employed purposive sampling through online questionnaires to collect data, subsequently analyzing the data using SmartPLS-SEM. The findings of this investigation indicate that brand experience positively influences brand love and loyalty. Additionally, brand love positively impacts brand loyalty, while brand experience also positively affects brand loyalty, mediated by brand love. This research is expected to make an academic and industrial contribution regarding the importance of BE in building brand loyalty with BL as a mediating variable.
ANALISIS DAN PERSEPSI PENGGUNA PARKIR STASIUN COMMUTER LINE DARU DI KABUPATEN TANGERANG
Authors: Habib Nur Muhammad
Published: February 2024

Daru station parking is a parking facility at Daru Station that is used by users of the Tanah Abang – Rangkas Bitung commuter line.The research aims to find out what things must be evaluated, and maintained against parking lots. The method used in this study consisted of direct observation methods and data processing using the IPA method. Based on the analysis that has been carried out, the parking space in this study is sufficient to accommodate four wheeled vehicles while based on user perceptions using the IPA method the parking space is considered good, but there are still aspects that need to be improved, namely the adequacy of parking space for two wheels, tha availability of roof coverings for vehicles and pavement in the parking are
DAMPAK PANDEMI COVID-19 TERHADAP PEMILIHAN MODA TRANSPORTASI PADA SAAT SEBELUM PPKM, SAAT PPKM, DAN SETELAH PPKM
Authors: Edward Thomas
Published: February 2024

One of the most frequently used means of moving is by using public transportation. Public transportation develops following the economic development of a region, the faster the region develops, more public transportation will be needed. However, since the pandemic of COVID-19 started there are many new policies have been issued by the government, both for the public and the private transportation. One of the policies that have been applied is new normal, where people who will carry out activities outside home must follow the health protocol as applicable to government regulation referred to as Large Scale Social Restrictions (LSSR).

Keywords: Public Transportation, New Normal, Covid-19, LSSR.

Salah satu sarana untuk berpindah tempat yang paling sering digunakan adalah transportasi umum. Transportasi umum berkembang mengikuti perkembangan ekonomi suatu wilayah, semakin pesat wilayah itu berkembang maka semakin banyak juga transportasi umum yang akan dibutuhkan. Namun sejak terjadinya pandemi COVID-19 banyak berlaku aturan-aturan baru yang dikeluarkan oleh pemerintah, baik pada angkutan umum ataupun angkutan pribadi. Salah satu peraturan yang diterapkan adalah New Normal, dimana masyarakat akan melakukan yang akan melakukan aktivitas diluar rumah harus mengikuti protokol Kesehatan sebagaimana berlaku pada aturan pemerintah yang disebut sebagai Pemberlakuan Pembatasan Kegiatan Masyarakat (PPKM).

Kata kunci: Transportasi Umum, New Normal, Covid-19, PPKM.
ANALISIS KAPASITAS SALURAN DRAINASE PERUMAHAN Y DI CIPINANG MUARA - JAKARTA TIMUR
Authors: Saragih Matthew Firmata Brevando
Published: February 2024

Floods are the overflow of water into rivers or canals due to the inability of existing rivers or canals to drain water. One of the causes of flooding is rain. The payback period used is the payback period of 2.5 and 10 years. The capacity of the existing drainage channel was analyzed using the Manning method to determine the current runoff, then compared with the existing flood flow due to rainfall with repeated cycles of 2, 5 and 10 years. When compared, there are 9 channels that cannot accommodate inflow in the 2 year period and there are 15 existing channels that cannot accommodate inflow in the 5 and 10 year periods. There are also other factors that cause flooding in Dwelling X Cakung - East Jakarta, namely litter in the canal and sediment at the bottom of the canal causing frequent flooding in Dwelling X Cakung - Jakarta

Keywords: Flood, Drainage, Rainfall

Banjir adalah meluapnya air ke sungai atau kanal akibat ketidakmampuan sungai atau kanal yang ada untuk mengalirkan air. Salah satu penyebab banjir adalah hujan. Payback period yang digunakan adalah payback period 2,5 dan 10 tahun. Kapasitas saluran drainase eksisting dianalisis menggunakan metode Manning untuk mengetahui debit aliran saat ini, kemudian dibandingkan dengan debit banjir eksisting akibat curah hujan dengan siklus berulang 2, 5 dan 10 tahun. Jika dibandingkan, terdapat 9 saluran yang tidak dapat menampung inflow pada periode 2 tahun dan terdapat 15 saluran eksisting yang tidak dapat menampung inflow pada periode 5 dan 10 tahun. Ada juga faktor lain penyebab banjir di Dwelling X Cakung - Jakarta Timur yaitu serasah di saluran dan sedimen di dasar saluran menyebabkan seringnya terjadi banjir di Dwelling X Cakung - Jakarta.

 

Kata kunci: Banjir, Drainase, Curah Hujan
PANJANG PENGANGKURAN DAN JARAK TEPI PADA KUAT TARIK ANGKUR ADHESIF
Authors: Christianto Daniel , Patrick Patrick , Untari Liucius Yenny
Published: February 2024

Anchors are used to transfer structural loads in tension, shear, or a combination of both. One example of an anchor type is the post-installed adhesive anchor. Post-installed adhesive anchors are installed after the concrete has hardened. The main advantage of post-installed anchors is the flexibility of installation time, which makes it easier to schedule construction activities. One of the factors that determine the tensile strength of an anchor is the embedment depth and edge distance of the anchor in the concrete. Typically, the embedment depth and edge distance used are obtained from the anchor manufacturer's brochure or catalog and are also regulated in SNI 2847:2019. With the advancement of technology and new products from manufacturers, it is necessary to conduct tensile strength tests to compare the results of different embedment depths and edge distances. In this research, tensile tests were conducted on post-installed adhesive anchors with embedment depths of 35 mm, 105 mm, and 150 mm, with edge distances of 75 mm, 130 mm, and 250 mm at each depth. From the test results, it can be concluded that the embedment length of the anchor affects the tensile strength, as deeper embedment results in greater tensile strength for the anchor.
Abstrak
Angkur digunakan untuk menyalurkan beban struktural dalam tarik, geser atau kombinasi antara tarik dan geser. Salah satu contoh jenis angkur adalah angkur pasca pasang adhesif. Angkur pasca pasang adhesif adalah jenis angkur yang di pasang setelah beton mengeras. Keunggulan utama angkur pasca pasang adalah adalah fleksibilitas waktu pemasangan sehingga memudahkan mengatur jadwal konstruksi. Salah satu faktor yang menentukan kuat tarik pada angkur adalah kedalaman penanaman angkur dan juga jarak tepi angkur pada beton. Umumnya kedalaman penanaman angkur dan jarak tepi yang digunakan didapatkan dari brosur atau katalog pabrik angkur itu sendiri dan juga diatur dalam SNI 2847:2019 dengan berkembangnya teknologi dan produk-produk baru dari manufaktur perlu adanya uji kekuatan tarik untuk membandingkan hasil kekuatan tarik yang diperoleh dengan kedalaman penanaman dan jarak tepi yang berbeda-beda. Pada penelitian ini dilakukan pengujian tarik pada angkur pasca pasang adhesif dengan kedalaman penananaman sebesar 35 mm, 105 mm dan 150 mm dengan jarak tepi 75 mm, 130 mm dan 250 mm pada masing-masing kedalaman. Dari hasil pengujian dapat disimpulkan bahwa kedalaman penanaman angkur mempengaruhi hasil kuat tarik, semakin dalam penanaman angkur maka semakin besar kuat tarik dari angkur tersebut.
ANALISIS PENGENDALIAN PROYEK DENGAN METODE CRASHING PADA PROYEK PT X DI JAKARTA
Authors: Retor Gerald Dennis Joseph , Oei Fuk Jin
Published: February 2024

Project development often encounters obstacles that cause delays in project activities that have previously been planned in the scheduling process. The purpose of this study is to determine the duration of project completion time on the PT X Project in Jakarta using the crashing method of adding overtime hours and labor at an optimal cost, and to compare which method has the shortest duration of completion time at an optimal cost. From the calculation of the acceleration of project time and cost, it can be compared to the acceleration of adding 4 hours of work (overtime) with a reduction in duration of 40 days where the project completion time of the project which was originally 515.5 days became 475.5 days and the total cost of normal work which amounted to Rp 9,560,710,930 became Rp 9,857,229. 805 or an increase of 3.101% from the total cost of the normal project, while with the addition of labor with a reduction in duration of 50 days where the project completion time of the project becomes 465.5 days and the total cost of normal work which amounts to Rp 9,560,710,930 to Rp 9,651,997,862 or an increase of 0.954% from the total cost of the normal project. Based on the results of the sensitivity analysis of crashing with the addition of working hours and overtime, it is found that crashing with the addition of labor is better in terms of time and cost.
Abstrak
Pembangunan proyek sering dijumpai kendala yang menyebabkan terjadinya keterlambatan aktivitas proyek yang sebelumnya telah direncanakan dalam proses penjadwalan (scheduling). Tujuan penelitian ini ialah untuk menentukan durasi waktu penyelesaian proyek pada Proyek PT X di Jakarta menggunakan metode crashing penambahan jam lembur dan tenaga kerja dengan biaya yang optimal, dan untuk membandingkan metode mana yang memiliki durasi waktu penyelesaian terpendek dengan biaya yang optimal. Dari perhitungan percepatan waktu dan biaya proyek dapat dibandingkan percepatan penambahan 4 jam kerja (lembur) dengan pengurangan durasi 40 hari dimana waktu penyelesaian proyek proyek yang awalnya 515,5 hari menjadi 475,5 hari  dan total biaya pekerjaan normal yang jumlahnya sebesar Rp 9.560.710.930  menjadi Rp  9.857.229.805 atau naik 3,101% dari total biaya proyek normal, sedangkan dengan penambahan tenaga kerja dengan pengurangan durasi 50 hari dimana waktu penyelesaian proyek proyek menjadi 465,5 hari  dan total biaya pekerjaan normal yang jumlahnya sebesar Rp 9.560.710.930  menjadi Rp 9.651.997.862 atau naik  0.954% dari total biaya proyek normal. Berdasarkan hasil analisis sensitivitas dari crashing dengan penambahan jam kerja dan lembur didapat bahwa crashing dengan penambahan tenaga kerja lebih baik dalam segi waktu dan biaya.
PENGARUH PENAMBAHAN GETAH KARET TERHADAP STABILITAS NILAI MARSHALL PADA CAMPURAN ASPAL (AC-WC)
Authors: Yanti Alfina Trisman , Masthura Lely , Basrin Defry
Published: February 2024

Rubber prices decreased as a result of the reduction in local rubber prices. One method to keep rubber prices stable is to use natural rubber in the infrastructure sector, especially as a second ingredient in asphalt (rubber asphalt). For paving roads, this material with rubber latex added is highly recommended, especially in Indonesia, one of the major producers of rubber. This the study is set out to measure the Marshall characteristic value of rubber latex applied to AC-WC 60/70 mixed sticks that comply with 2018 Bina Marga requirements as well as the impact of employing rubber latex as an asphalt replacement material. 2018 Bina Marga requirements and the use of rubber latex as a substitute for asphalt. The rubber latex samples used in this research technique were added to an asphalt mixture with an optimal asphalt concentration of 5.96%. The rubber latex samples ranged in percentage from 5% to 12%. Based on the experimental findings, it is known that the effect of adding rubber latex as an asphalt replacement material that achieves the best results and meets the 2018 Bina Marga specifications is the addition of rubber latex with a content of 5%, which includes a density value of 2,203 gr/ml, stability 1215.55 kg, flow 2.35 mm, VIM 8.838%, VMA 19.907%, and other values.VFB 54.95%.
Abstrak
Harga Karet mengalami penurunan sebagai akibat dari penurunan harga Karet lokal. Salah satu cara untuk menjaga kestabilan harga karet adalah dengan menggunakan karet alam di sektor infrastruktur, khususnya sebagai bahan kedua aspal (karet aspal). Untuk pengaspalan jalan, bahan dengan tambahan lateks karet ini sangat direkomendasikan, terutama di Indonesia yang merupakan salah satu penghasil utama karet. Penelitian ini bertujuan untuk mengukur nilai karakteristik Marshall lateks karet yang diaplikasikan pada stik campuran AC-WC 60/70 yang memenuhi persyaratan Bina Marga 2018 serta dampak penggunaan lateks karet sebagai bahan pengganti aspal pada Bina Marga 2018 persyaratan dan untuk menilai dampak penggunaan getah karet sebagai pengganti aspal dalam. Sampel lateks karet yang digunakan dalam teknik penelitian ini ditambahkan ke dalam campuran aspal dengan konsentrasi aspal optimal 5,96%. Sampel getah karet berkisar persentase dari 5% sampai 12%. Berdasarkan hasil percobaan diketahui pengaruh penambahan lateks karet sebagai bahan pengganti aspal yang mencapai hasil terbaik dan memenuhi spesifikasi Bina Marga 2018 adalah penambahan lateks karet dengan kadar 5% yang meliputi berat jenis nilai 2.203 gr/ml, stabilitas 1215,55 kg, flow 2,35 mm, VIM 8,838%, VMA 19,907%, dan nilai lainnya. VFB 54,95%.
QUALITY CONTROL PEKERJAAN SLOOF DI PROYEK X
Authors: Elnando Elnando , Sutandi Arianti
Published: February 2024

In construction work, the most common mistakes occur are at the implementation stage. Quality control is a system implemented by a company that involves engineering, measurement and specification control activities to maintain and achieve specified product quality in accordance with established standards. The purpose of this article is also to analyze the implementation of quality control of sloof work at construction companies that takes place on project or not and can help agencies and individuals who are carrying out sloof work to maintain quality control on construction projects. In this research, data was collected through literature studies from related books and journals, direct surveys in the field to obtain technical data and direct interviews with quality supervisors (contractors) to obtain information regarding project implementation taking place in the field, especially from monitoring. contractor quality (project x in Tangerang). Based on the results of the analysis, each stage of quality control in sloof work needs to be considered and taken into account in order to maintain quality in construction.
Abstrak
Pada konstruksi aktual, kesalahan konstruksi paling banyak terjadi pada tahap pelaksanaan, yaitu sekitar 30%. Sebagian besar risiko kegagalan bergantung pada pekerjaan wirausahawan. Pengendalian mutu adalah suatu sistem yang diterapkan oleh suatu perusahaan yang melibatkan kegiatan rekayasa, pengukuran dan pengendalian spesifikasi untuk mempertahankan dan mencapai mutu produk yang ditetapkan sesuai dengan standar yang telah ditetapkan. Tujuan artikel ini juga  untuk menganalisis pelaksanaan pengendalian  mutu beton pada  perusahaan konstruksi yang berlangsung pada proyek X di wilayah Tangerang untuk dapat menyimpulkan apakah pelaksanaan pengendalian mutu tersebut apakah beton yang diterapkan pada proyek ini sudah baik. atau tidak. . Dalam penelitian ini, informasi yang tersedia dikumpulkan melalui penelitian lapangan untuk memperoleh informasi dasar dan wawancara langsung dengan pengawas mutu (kontraktor) untuk memperoleh informasi, data yang lebih komprehensif mengenai pelaksanaan proyek yang berlangsung di lapangan. Pengkajian dibahas mengaplikasikan metode observasi juga menyusun informasi  langsung di lokasi kejadian, khususnya dari monitoring kualitas kontraktor (proyek x  di Tangerang).
OPTIMALISASI WAKTU DAN BIAYA PELAKSANAAN PROYEK X MENGGUNAKAN METODE LEAST COST ANALYSIS
Authors: Tanuwihardjo Gervan Abraham , Anondho Basuki
Published: February 2024

Construction projects can be completed on time and the costs incurred are appropriate based on what was carefully planned. Optimizing time and costs is an effort to utilize relatively short time with minimum costs to achieve work with good results and profits while still paying attention to the quality and qualities of a project. The research on project X aims to analyze the optimum time and costs with additional workforce. This research uses the least cost analysis method. By using this method, the optimal project duration can be obtained with the minimum possible total project costs calculated from the activities that have the lowest cost slope. This research requires secondary data in the form of a Cost Budget Plan (RAB), time schedule and unit price analysis list. Based on research using the least cost analysis method with additional labor, it was found that the completion duration was reduced by 48 days with a total cost of Rp.12.527.874.866, direct costs of Rp.12.262.603.151, and indirect costs of Rp.265.271.714.
Abstrak
Optimalisasi waktu dan biaya adalah usaha pemanfaatan waktu yang relatif singkat dengan biaya yang minimum untuk mencapai suatu pekerjaan dengan hasil dan keuntungan yang baik dengan tetap memperhatikan mutu dan kualitas suatu proyek. Penelitian pada proyek X ini bertujuan untuk menganalisis waktu dan biaya optimum dengan adanya penambahan tenaga kerja. Penelitian ini menggunakan metode least cost analysis. Dengan menggunakan metode ini dapat diperoleh durasi proyek yang optimal dengan biaya total proyek seminimal mungkin dihitung dari kegiatan yang memiliki cost slope terendah. Pada penelitian ini memerlukan data sekunder berupa Rencana Anggaran Biaya (RAB), time schedule dan daftar analisa harga satuan. Berdasarkan penelitian melalui metode least cost analysis dengan penambahan tenaga kerja didapat pengurangan durasi penyelesaian selama 48 hari dengan biaya total sebesar Rp.12.527.874.866, biaya langsung sebesar Rp.12.262.603.151, dan biaya tak langsung sebesar Rp.265.271.714.
ANALISIS PRODUKTIVITAS TENAGA KERJA PADA PENGERJAAN KOLOM DI PROYEK DNL
Authors: Iskandar Daniel Nathan , Pranata Giovanni
Published: February 2024

Productivity is key to a company's competitiveness, influencing project success and costs. This research analyzes labor productivity in column work on the DNL project by comparing it with SNI standards and the PUPR Ministerial Regulation. The method used in this research is Worksampling on the DNL project. The research results show a large difference between field and reference productivity. Reinforcement work has a productivity difference of 0.46 times from SNI and 1.28 times from PermenPUPR. This is due to the use of more efficient tools and implementation methods in the field. Increased productivity also occurs in formwork and casting work through the use of appropriate technology and tools. These comparisons provide important insights for project planners and future workforce performance assessments.
Abstrak
Produktivitas merupakan kunci daya saing perusahaan, mempengaruhi keberhasilan proyek dan biaya. Penelitian ini menganalisis produktivitas tenaga kerja pada pengerjaan kolom di proyek DNL dengan membandingkannya dengan standar SNI dan PermenPUPR. Metode yang digunakan dalam penelitian ini adalah Worksampling  pada proyek DNL. Hasil penelitian menunjukkan perbedaan besar antara produktivitas lapangan dan acuan. Pekerjaan pembesian memiliki perbedaan produktivitas sebesar 0,46 kali dari SNI dan 1,28 kali dari PermenPUPR. Hal ini disebabkan oleh penggunaan alat bantu dan metode pelaksanaan yang lebih efisien di lapangan. Peningkatan produktivitas juga terjadi pada pekerjaan bekisting dan pengecoran melalui penggunaan teknologi dan alat bantu yang sesuai. Perbandingan ini memberikan wawasan penting bagi perencana proyek dan penilaian kinerja tenaga kerja di masa mendatang.
KEKUATAN LELAH DUCTILE IRON THIN WALL CONNECTING ROD VESPA PX-150
Authors: Oktaviano Yoska , Fadhlan Muhammad , Sulamet-Ariobimo Rianti Dewi
Published: February 2024

Penggunaan komponen ringan pada kendaraan bermotor adalah salah satu strategi yang dapat diambil untuk menunjang ketahanan energi. Dengan komponen yang ringan maka kendaraan bermotor akan menggunakan energi lebih sedikit jika dibandingkan dengan yang menggunakan komponen normal. Batang piston ringan telah berhasil dibuat dengan menggunakan teknologi pengecoran dinding tipis. Batang piston ini lebih ringan hingga 26% jika dibandingkan komponen awalnya yang terbuat dari baja tempa. Batang piston dinding tipis ini tetap memiliki kemampuan yang setara dengan batang piston normal. Selanjutnya untuk memastikan kelayakan batang piston maka dilakukan pengujian lelah (fatigue). Pengujian lelah dilakukan dengan memberikan gaya dinamis pada batang piston sebanyak satu juta siklus dengan gaya 17KN mengikuti ISO 1083 minimal fatigue limit tanpa takik.
Brauchen wir Störungswissen, um personzentriert arbeiten zu können?
Authors: Fehringer Christian
Published: February 2024

Die vorliegende Arbeit befasst sich mit der Frage, ob wir Störungswissen brauchen, bzw. unter welchen Bedingungen wir welches Wissen wann und wozu benötigen, und welche Kriterien für die Entscheidungen relevant sind. Komplexe biologische, psychische oder soziale Systeme weisen Merkmale von Vernetztheit und Rekursivität aller beteiligten Komponenten und Prozesse auf und gewinnen damit ihre Autonomie. Personen befinden sich in einem permanenten Prozess der selbstorganisierenden Bedeutungs- und Informationserzeugung: Sie konstruieren ihre Wirklichkeit in ständigen Wechselwirkungsprozessen mit der Umwelt. Neben personzentrierten Ideen ist für diese Arbeit das Konzept der Autopoiese wesentlich. Damit verbunden sind konstruktivistische Überlegungen und Gedanken zur Kybernetik zweiter Ordnung, die „Objektivität“ durch Beobachtung zweiter Ordnung ersetzt. Wir beobachten wie andere zu ihren Unterscheidungen kommen und was dadurch sichtbar oder unsichtbar wird. „Wissen“ repräsentiert also nicht Dinge, sondern Unterscheidungen. Auf unser Tätigkeitsfeld bezogen heißt das, wir bekommen es nicht mit den Problemen an sich zu tun, sondern nur und ausschließlich mit den Problem-Sichtweisen der Klienten in Bezug auf ihre Situation.
PENGADAAN TANAH UNTUK PEMBANGUNAN JALAN RING ROAD II OLEH PEMERINTAH KOTA MANADO (PUTUSAN NOMOR 661/PDT.G/2021/PN. MND)
Authors: Salsabila Ghina Luthfiyah  , Intan Nevia Cahyana
Published: February 2024

Infrastructure development in Indonesia, such as the construction of Ring Road II by the Manado City Government, aims to enhance welfare. However, the land acquisition process for this project does not align with the procedures outlined in Law Number 2 of 2012 regarding Land Procurement for Public Interest Construction. The research investigates the land acquisition process and assesses whether Decision Number 661/Pdt.G/2021PN Mnd complies with the law. Using descriptive normative research with secondary data, the study reveals that the Manado City Government's land acquisition process lacks conformity with the legal preparatory stages specified in Articles 18 and 19 of Law Number 2 of 2012. Consequently, the considerations and decision in Judge's Decision Number 661/Pdt.G/2021PN Mnd align with the law.