bluuebunny/crossref_metadata_2025 huggingface dataset:
Rheology and Structure of Model Smectite Clay: Insights from Molecular Dynamics
Authors: Lin Zhu-Yuan , Hatano Takahiro
Published: February 2024

The low frictional strength of smectite minerals such as montmorillonite
is thought to play a crucial role in controlling the rheology and the
stability of clay-rich faults. In this study, we perform coarse-grained
molecular dynamics simulations on a model clay system, in which clay
platelets are simplified as oblate ellipsoids interacting via Gay-Berne
potential. We study the rheology and the structure development during
shear in this model system, which is sheared at constant strain rates
for 10 strains after compression and equilibrium. We find that the
system exhibits velocity-strengthening behavior over a range of normal
stresses from 1.68 to 56.18 MPa and a range of strain rates from
6.93´105 to 6.93´108 /s. The relationship between the shear stress and
the strain rate follows the Herschel-Bulkley model. In general, shear is
localized at lower strain rate and higher normal stress, whereas the
homogeneous shear is realized at higher strain rates. The structure
change by the shear is analyzed from various aspects: the volume
fraction, the particle orientation, the velocity profile, and the
parallel radial distribution function. We find that particle
rearrangement and compaction dominate at the early stage of shear when
the shear stress increases. Shear band starts to form at the later stage
when the shear stress decreases and relaxes to a steady-state value. The
structure development at low strain rates is similar to that in previous
experimental observations. The stacking structure weakens during shear,
and restores logarithmically with time in the rest period.
The Influence of Large-Scale Spatial Warming on Jet Stream Extreme Waviness on an Aquaplanet
Authors: Batelaan Thomas J. , Weijenborg Chris , Steeneveld Gert-Jan , Heerwaarden Chiel C. van , Sinclair Victoria Anne
Published: February 2024

The effect of modified equator-to-pole temperature gradients on the jet
stream by low-level polar warming and upper-level tropical warming on
jet streams is not fully understood. We perform four aquaplanet
simulations to quantify the impact of different sea surface temperature
distributions on jet stream strength, wave amplitudes and jet stream
waviness, quantified by a modified Sinuosity Index. A large-scale
uniform warming scenario increases the jet strength whereas decreases in
jet strength occur in two scenarios where the meridional temperature
gradient is reduced. However, all scenarios indicate substantial
decreases in the magnitude of large wave amplitudes, jet stream extreme
waviness and reduced variability of these diagnostics, suggesting a
relationship with weakened baroclinicity. Our findings contradict the
earlier proposed mechanism that low-level polar warming weakens the jet
stream and increases wave amplitudes and jet stream waviness. We
conclude that a weaker jet stream does not necessarily become wavier.
Evaluating Variations in Great Salt Lake Inflow to Infer Human Consumptive Water Use, A Volume Reconstruction Approach
Authors: Merck Madeline , Tarboton David Gavin
Published: February 2024

The declining water level in Great Salt Lake (GSL) has been attributed
to human consumptive water use that depletes natural streamflow into the
lake. Understanding depletions due to historical consumptive water use
within the GSL Basin is important to managing present and future lake
conditions. Direct calculations of consumptive water use in the basin
are made by summing detailed uses and return flows. However, this method
is limited by insufficient data and resulting estimates thus far have
been disparate. In this study, we reconstructed total GSL water inputs
and stream inflows using lake levels recorded from 1847-2023 to estimate
the magnitude of reductions due to consumptive use and the associated
lake level decline. To do so, we developed a method that uses lake
volume changes derived from bathymetry and water surface elevation
measurements along with estimates of annual evaporation and
precipitation over the lake to hindcast inflow volume to the lake. The
declining trend in lake inflow, without associated precipitation or
natural streamflow trends, was used to quantify basin wide water
depletions to be up to 2.3 km3/yr and the current lake level decline
associated with this estimate to be as much as 4.6 meters. This basin
wide depletion estimate depends only on lake level, precipitation, and
evaporation estimates and is not limited by the challenges of
aggregating individual diversions and return flows.
Accuracy and Resolution of SWOT Altimetry: Foundation Seamounts
Authors: Yu Yao , Sandwell David T. , Dibarboure Gérald , Chen Curtis , Wang Jinbo
Published: February 2024

We assess the accuracy and spatial resolution of the Surface Water and
Ocean Topography (SWOT) swath altimeter for measuring marine gravity
anomalies. The analysis is performed at the Foundation Seamounts in the
South Pacific where we developed a highly accurate gravity field by
combining the long-wavelength (> 40 km) gravity field
derived from previous nadir altimeters with the shorter wavelength
gravity field from the seafloor topography as constrained by the ship
gravity. In this region, the slope of the ocean variability is 50-100
times smaller than the gravity/slope signal of the seamounts so can be
ignored in the analysis. Each SWOT cycle can deliver gravity anomaly/SSS
with an accuracy of 2.6 mGal/μrad and a spatial resolution of 14 km,
with accuracy diminishing when significant wave height (SWH) exceeds
~6 meters. Averaging repeated SWOT measurements improves
the accuracy and resolution. For example, we expect that averaging just
10 repeats (7 months) results in accuracy/resolution that matches the
best marine gravity maps based on 230 months of nadir altimetry. With a
mission lasting over a year, SWOT promises a substantial leap in marine
gravity accuracy and resolution, uncovering previously uncharted details
of the seafloor, including thousands of uncharted seamounts.
Synoptic variability in the tropical oceanic moist margin
Authors: Robinson Corey Michael , Narsey Sugata , Jakob Christian
Published: February 2024

Recent research has described a ‘moist margin’ in the tropics, defined
through a total column water vapor (TCWV) value of 48 kg m-2, that
encloses most of the rainfall over the tropical oceans. Diagnosing the
moist margin in the ERA5 reanalysis reveals that it varies particularly
on synoptic time scales, which this study aims to quantify. We define
‘wet and dry perturbation’ objects based on the margin’s movement
relative to its seasonal climatology. These perturbations are associated
with a variety of features, such as tropical cyclones and lows, tropical
waves, and extrusions of moisture towards the extratropics. Wet (dry)
perturbations produce substantially more (less) rainfall compared to the
seasonal average, confirming the clear link between moisture and
precipitation. On synoptic scales we suggest that mid-tropospheric
humidity plays a key role in creating these perturbations, while sea
surface temperatures (SSTs) are relatively unimportant.
Synoptic Moisture Intrusion Provided Heavy Isotope Precipitations in Inland Antarctica during the Last Glacial Maximum
Authors: Kino Kanon , Cauquoin Alexandre , Okazaki Atsushi , Oki Taikan , Yoshimura Kei
Published: February 2024

Stable water isotopes in inland Antarctic ice cores are powerful
paleoclimate proxies; however, their relationship with dynamical
atmospheric circulations remains controversial. Using a water isotope
climate model (MIROC5-iso), we assessed the influence of the Last
Glacial Maximum (LGM; ~21,000 years ago) sea surface
temperatures (SST) and sea ice (SIC) on Antarctic precipitation isotopes
(δ18Op) through atmospheric circulation. The results revealed that the
synoptic circulation mostly maintained southward moisture transport,
reaching inland Antarctica. The steepened meridional SST gradient in the
mid-latitudes increased δ18Op in inland Antarctica by enhancing the
baroclinic instability and synoptic moisture transport. In contrast,
enhanced SIC reduced the atmospheric humidity around Antarctica and
lowered δ18Op through extensive surface cooling and transport from the
ocean. These findings elucidate the isotopic proxies and enable us to
constrain the southern hemisphere atmospheric circulation, including the
westerlies, using ice cores during past climates, including the LGM.
Implementation of WRF-Urban Asymmetric Convective Model (UACM) for Simulating Urban Fog over Delhi, India
Authors: Bhautmage Utkarsh Prakash , Ghude Sachin D. , Parde Avinash N. , Kamath Harsh G. , Dhangar Narendra Gokul , Pleim Jonathan E. , Wong Michael Mau Fung , Wagh Sandeep Dnyandeo , Kumar Rakesh , Niyogi Dev , M Rajeevan
Published: February 2024

Accurate fog prediction in densely urbanized cities poses a challenge
due to the complex influence of urban morphology on meteorological
conditions in the urban roughness sublayer. This study implemented a
coupled WRF-Urban Asymmetric Convective Model (WRF-UACM) for Delhi,
India, integrating explicit urban physics with Sentinel-updated USGS
land-use and urban morphological parameters derived from the UT-GLOBUS
dataset. When evaluated against the baseline Asymmetric Convective Model
(WRF-BACM) using Winter Fog Experiment (WiFEX) data, WRF-UACM
significantly improved urban meteorological variables like diurnal
variation of 10-meter wind speed, 2-meter air temperature (T2), and
2-meter relative humidity (RH2) on a fog day. UACM also demonstrates
improved accuracy in simulating temperature and a significant reduction
in biases for RH2 and wind speed under clear sky conditions. UACM
reproduced the nighttime urban heat island effect within the city,
showing realistic diurnal heating and cooling patterns that are
important for accurate fog onset and duration. UACM effectively predicts
the onset, evolution, and dissipation of fog, aligning well with
observed data and satellite imagery. Compared to WRF-BACM, WRF-UACM
reduces the cold bias soon after the sunset, thus improving the fog
onset error by ~4 hours. This study underscores the
UACM’s potential in enhancing fog prediction, urging further exploration
of various fog types and its application in operational settings, thus
offering invaluable insights for preventive measures and mitigating
disruptions in urban regions.
Electron density enhancement over a wide altitude range during ionosphere heating experiments at EISCAT
Authors: Wu Jun , Wu Jian , Feng Jie , Li Qingliang , Hao Shuji , Xu Zheng-Wen , Zhao Hai-Sheng
Published: February 2024

During the course of ionospheric heating experiments, an apparent
electron density enhancement was observed at the European Incoherent
Scatter Scientific Association (EISCAT). The enhancement extended over a
wide range of altitudes, above the reflection altitude of the
high-frequency pump wave. However, it remains open whether this
enhancement actually corresponds to a true enhancement in electron
density. Following the dispersion relation of ion acoustic waves, the
frequency ratio of the enhanced ion line to the background ion line
suggests that the profile of the effective ion mass might remain
unchanged. Furthermore, the solar radio flux and ion drift velocity
indicated no significant changes in the ion species and their densities.
In conclusion, the electron density enhancement observed at EISCAT,
might not in fact be a true enhancement.
Midwifery of the Future: A Widening Field of Competences
Authors: Haider Rehan
Published: February 2024

The field of midwifery has been developing rapidly, reflecting the changing landscape of healthcare and the different needs of anticipating mothers and their classifications. Midwifery, which formerly generally guided labour, has expanded into an inclusive rule of competence that extends far beyond the delivery room. This conversion is designed to meet the complete healthcare needs of mothers throughout their generative journey from prejudice to postpartum. Modern midwives are progressively being acknowledged as basic healthcare providers who offer care continuation. They carry an extended collection of competencies, encompassing not only reproductive support but also gynaecological care, birth control, intercourse wellbeing education, and menopausal support. Midwives have adapted to different educational circumstances, forging alliances with obstetricians, nurses, and additional healthcare professionals to ensure logical woman-centred care. In terms of mathematical health, midwives influence electronics to support telehealth duties, monitor high-risk pregnancies by chance, and offer approachable instruction and support through traveling apps and platforms. This enlarging field of competencies involves a powerful emphasis on mental well-being, as midwives play a critical role in labeling perinatal mood disorders and providing psychological support to wives. Furthermore, midwifery has taken up evidence-based practices, fostering an education of research and novelty. Midwives help with the implementation of best practices, ensuring first-rate care of their cases. They undertake constant education, stop next to new healing advancements, and maintain their guidance abilities to advocate for mothers’ well-being and reproductive rights. As midwifery continues to progress, cooperation with healthcare providers, policymakers, and society is essential. By admitting the extending competencies of midwives, we can ensure that girls endure inclusive, sympathetic, and mankind’s welfare and competent care during the whole of their generative journey, forming the future of midwifery as a necessary component of modern healthcare.
FMUPorto - Summaries and comments
Authors:   Unidade de Saúde Baixo Mondego, dos Santos Gonçalo a , Lobão Carlos a ,   Unidade de Saúde do Tâmega e Sousa, Ribeiro Pires Costa Joel b ,   Área Sanitária de Vigo, Espanha, de Azevedo Paiva Matheus ,   S. Paulo, Brasil
Published: February 2024

a Device-measured physical activity, sedentary time, and risk of all-cause mortality: an individual participant data analysis of four prospective cohort studies* b Association between estimated cardiorespiratory fitness and breast cancer: a prospective cohort study
PENGGUNAAN MULTI NUTRIENT SAUCE (MNS) DAN INDIGOFERA DALAM RANSUM KOMERSIAL DAN PENGARUHNYA TERHADAP PERTAMBAHAN BOBOT TUBUH, KONSUMSI RANSUM, DAN KONVERSI RANSUM
Authors: Hati Diah Permata , Erwanto Erwanto , Liman Liman , Adhianto Kusuma , Tantalo Syahrio , Noer Irmayani , Hasiib Etha' Aziza
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan multi nutrient sauce dan indigofera sp.  pada ransum terhadap pertambahan bobot tubuh, konsumsi ransum, dan konversi ransum pada sapi potong. Penelitian ini dilaksanakan pada September 2022--November 2022 di Desa Negeri Katon, Kecamatan Negeri Katon, Kabupaten Pesawaran, Provinsi Lampung. Penelitian ini dilakukan menggunakan Rancangan Acak Kelompok (RAK) dengan 3 perlakuan dan 4 kelompok, dengan menggunakan 12 sapi potong. Perlakuannya adalah R1 ; Ransum Basal (Konsentrat Grumi Feed A) 60% + Hijauan (Silase tebon jagung) 40%, R2 ; R1 + multi nutrient sauce  6,45 % R3 ; R2 + Indigofera sp. 10%. Hasil penelitian pada konsumsi ransum sapi potong sebesar (R1 10,80 ± 0,90 ; R2 11,23 ± 1,78 ; dan  R3 11,65 ± 1,35) kg/hari, hasil pada pertambahan bobot badan sapi potong sebesar (R1 1,29 ± 0,32 ; R2 0,71 ± 0,28 ; dan R31,40 ± 0,19) kg/hari, hasil pada konversi ransum sapi potong sebesar (R1 9,75 ± 4,79 ; R2 16,79 ± 3,34 ; dan R3 8,44 ± 1,63 0,47). Hasil penelitian menunjukkan bahwa interaksi perlakuan tidak berpengaruh nyata (P>0,05) terhadap konsumsi ransum, pertambahan bobot tubuh, dan konversi ransum.
TOTAL ASAM, KEASAMAN, DAN VISKOSITAS YOGHURT SUSU SAPI DENGAN MENGGUNAKAN KOMBINASI STARTER YANG BERBEDA
Authors: Arzakiyah Fina , Wanniatie Veronica , Husni Ali , Qisthon Arif
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi starter bakteri terhadap kualitas fisik yoghurt susu sapi yang meliputi total asam, keasaman dan viskositas. Penelitian ini dilaksanakan pada Januari 2023 di Laboratorium Produksi Ternak, Jurusan  Peternakan Fakultas Pertanian Universitas Lampung dan pengujian sampel dilakukan di Laboratorium Teknologi Hasil Pertanian Politeknik Negeri Lampung. Penelitian ini dilakukan menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan yaitu P1 (Streptococcus thermophilus + Lactobacillus bulgaricus); P2 (Streptococcus thermophilus + Lactobacillus acidophilus + Bifidobacterium); P3 (Streptococcus thermophilus + Lactobacillus acidophilus + Bifidobacterium+ Lactobacillus bulgaricus); dan P4 (Streptococcus thermophilus + Lactobacillus acidophilus + Bifidobacterium + Lactobacillus casei) dan diulang sebanyak 4 kali. Peubah yang diamati meliputi total asam, keasaman dan viskositas. Data yang diperoleh dianalisis menggunakan analisis ragam pada taraf nyata 5%.  Hasil penelitian menunjukkan bahwa kombinasi starter bakteri berpengaruh nyata (P<0,05) terhadap viskositas dengan nilai tertinggi 2.918,00 cP dan total asam dengan nilai tertinggi 0,94% pada kombinasi starter bakteri Streptococcus thermophilus, Lactobacillus acidophilus, Bifidobacterium, dan Lactobacillus casei. Namun tidak berpengaruh nyata terhadap nilai pH.
PENGARUH EKSTRAK JINTAN HITAM (Nigella sativa) DENGAN DOSIS YANG BERBEDA DALAM RANSUM TERHADAP PERFORMA AYAM KAMPUNG ULU BETINA
Authors: Wulandari Melly , Santosa Purnama Edy , Farda Fitria Tsani , Nova Khaira
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian jintan hitam (Nigella sativa) dengan dosis yang berbeda dalam ransum dan untuk mengetahui level pemberian jintan hitam (Nigella sativa) yang terbaik terhadap konsumsi ransum, pertambahan berat tubuh, konversi ransum, dan mortalitas ayam kampung ULU betina. Penelitian ini dilaksanakan pada Desember 2022 — Februari 2023 di Kandang Laboratorium Lapang Terpadu, Fakultas Pertanian, Universitas Lampung. Penelitian ini menggunakan metode Rancangan Acak Lengkap (RAL), dengan 4 perlakuan dan 3 ulangan yang masing-masing ulangan terdiri dari 5 ekor ayam kampung ULU betina. Perlakuan yang diberikan yaitu P0 : ransum tanpa penambahan ekstrak Nigella sativa (kontrol), P1 : ransum dengan penambahan 36 mg/kg berat tubuh/hari ekstrak Nigella sativa, P2 : ransum dengan penambahan 72 mg/kg berat tubuh/hari ekstrak Nigella sativa, P3 : ransum dengan penambahan 144 mg/kg berat tubuh/hari ekstrak Nigella sativa. Data yang diperoleh dianalisis menggunakan ANOVA (Analysis of Variance) pada taraf 5% dan uji lanjut yang digunakan adalah uji Polinomial ortogonal. Hasil penelitian menunjukkan bahwa penambahan jintan hitam (Nigella sativa) dalam ransum tidak berpengaruh (P<0,05) terhadap konsumsi ransum, pertambahan berat tubuh, konversi ransum, dan mortalitas.
Modelo conceitual para concepção de projetos para desconstrução
Authors: Spadotto Aryane , Nagalli André , Silva Roberto Caldeira da , Fucale Stela , Rosa Altair
Published: February 2024

Diante da necessidade de alternativas para minimizar a geração de resíduos de construção e demolição (RCD), em que a demolição é a atividade que mais gera entulho, surge o projeto para desconstrução (PpD) como alternativa viável e sustentável à demolição. Embora existam procedimentos padronizados para projetos de edifícios há necessidade de melhorar a eficiência do PpD com a definição de métodos e ferramentas para aplicação dessa estratégia. Com o objetivo de viabilizar e facilitar o uso de parâmetros de PpD, este trabalho propõe um modelo conceitual de orientações para concepção de PpD. Para o desenvolvimento da proposta foi realizada pesquisa bibliográfica, com o levantamento de estratégias para a minimização de RCD, guias existentes para o PpD e ações que promovem a economia circular (EC), que foram base para o referencial teórico. Sequencialmente, foram utilizadas etapas de Design Science Research (DSR) para a formação do modelo conceitual. O modelo proposto apresenta oito diretrizes de PpD em conformidade com normas regulamentadoras, recomendações internacionais e sistemas construtivos. O modelo obtido serve de orientação para que sejam adotadas boas práticas pelos projetistas na etapa de tomada de decisões, com as escolhas de técnicas e materiais construtivos que causem menos danos e impactos ambientais. O estudo mostrou que decisões e especificações feitas por projetistas da construção civil têm impacto significativo nas possibilidades futuras de realocação de recursos, aumento do ciclo de vida dos componentes e vida útil de projeto, além de permitir o ciclo fechado de materiais.
Dispositivo de segurança para uso odontológico: uma abordagem interprofissional entre Design, Engenharia e Saúde – iDES
Authors: Natália Mattos da Silva  , Costa Diogo Pontes , Ruzza Nicolle Doneda , Merino Eugenio Andrés Díaz , Merino Giselle Schmidt Alves Diaz
Published: February 2024

As clínicas odontológicas vinculadas ao curso de graduação e pós-graduação de odontologia são os locais em que os estudantes iniciam a prática da profissão por meio do atendimento à comunidade. Neste cenário, um dos procedimentos mais comuns praticados é o de aplicação de anestesia local dentária, fundamental para a realização de cirurgias e restaurações, e uma das causas de acidentes com perfuração. Mediante esse contexto, esta pesquisa teve como objetivo Desenvolver um dispositivo de segurança odontológica para uso da seringa Carpule de anestesia dentária por uma equipe interprofissional (Design, Engenharia e Saúde). Para o desenvolvimento do projeto do Dispositivo de segurança foi utilizado o Guia de Orientação para o Desenvolvimento de Projetos (GODP). Esta pesquisa foi dividida em duas fases: Fase 1 -  pesquisas bibliográficas sobre ergonomia, segurança do trabalho e acidentes envolvendo perfurocortantes e estudantes de odontologia; e Fase 2 - Desenvolvimento do Dispositivo de segurança por meio de impressão tridimensional com base no levantamento de dados, questionários, entrevistas e testes. Foram validadas 41 respostas do questionário, sendo que 34% (n=14) dos estudantes relataram ter se acidentado com a seringa, 86% (n=12) do sexo feminino, 14% (n=2) do sexo masculino e 50% (n=7) dos acidentados estavam na 8ª, 9ª e 10ª fases do curso. A respeito do momento em que os acidentes ocorreram, 43% (n=6) relataram que o acidente ocorreu no reencape e 43% (n=6) durante o procedimento. 90% (n=37) relataram a importância e necessidade de dispositivos de segurança para o manuseio da seringa. Com as entrevistas foi possível complementar as informações levantadas, mapear o processo de administração da anestesia e identificar os momentos críticos. Assim, foi desenvolvido o projeto do dispositivo de segurança odontológica, o qual possibilita o reencape e descarte seguro da agulha utilizada na anestesia local dentária. Após testes em laboratório e contexto real, verificou-se a viabilidade técnica e seu potencial na proteção dos profissionais de saúde. Com relação à proteção legal do Dispositivo, foi solicitado junto ao INPI e, após a análise dos setores competentes, foi verificado o potencial dos requisitos de patenteabilidade (novidade, atividade inventiva e aplicação industrial) previstos na Lei de Propriedade Industrial.
EXPLORING THE DETERMINANTS OF COVID-19 MORTALITY RATE WORLDWIDE
Authors:   College of Computing, Informatics and Mathematics, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Seremban, AZHAR ELYA SARA SYUHADA , CHE SULAIMAN NUR SALSABILA ,   College of Computing, Informatics and Mathematics, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Seremban, ROSLI SITI NURAQINA ,   College of Computing, Informatics and Mathematics, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Seremban, MOHAMED YUSOF NOREHA ,   College of Computing, Informatics and Mathematics, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Seremban
Published: February 2024

SARS-CoV-2, also known as COVID-19, is a coronavirus that causes severe acute respiratory syndrome. The recent outbreak of COVID-19 had caught the world by surprise, resulting in millions of confirmed infected cases and 5,325,079 deaths documented worldwide. This study aims to explore the significant factors associated with COVID-19 mortality rate by focusing on the number of active cases, total cases, critical cases, vaccination doses, and screening tests. Secondary data from 219 countries was retrieved from CNN Health, Worldometer, and GitHub Our World in Data, which was later analysed using multiple linear regression. The results showed that total cases and vaccination doses of COVID-19 are the significant factors associated with COVID-19 mortality rate; active cases, critical cases, and screening tests were found to have insignificant relationships to COVID-19 mortality rate. This study offers further recommendations which can be accomplished using the updated data that include the patients’ common comorbidities, such as obesity, hypertension, and diabetes mellitus. Keyword(s) : COVID-19; mortality rate; multiple linear regression; vaccination doses
IDENTIFICATION OF PLANT GROWTH-PROMOTING COMPOUNDS IN LOCAL ISOLATED BACTERIA FROM CHILI PLANT ROOT
Authors:   School of Biology, Faculty of Applied Sciences, Universiti Teknologi MARA Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia, MOHAMAD FAUDZI NUR ZULAIKHA , MOHD-ARIS ASLIZAH ,   School of Biology, Faculty of Applied Sciences, Universiti Teknologi MARA Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia
Published: February 2024

Plant Growth-Promoting Bacteria (PGPB) has been established as a cultivation strategy that manipulates biocontrol mechanisms within the agriculture industry. However, a detailed understanding of PGPB in the local setting is still somewhat understudied. This consequently limits the commercial value of PGPB. The objectives of this research converge towards identifying plant growth-promoting compounds and studying the growth of plants following a treatment using two potential PGPBs that were previously isolated from local chili plant roots (strains A4 and A8). Three elements were identified in this study; indole-3-acetic acid (IAA) production, phosphate solubilization, and biological nitrogen fixation (BNF). The ability to produce IAA was quantified using Salkowski’s reagent. Additionally, the ability of both strains to grow on Pikovskaya’s agar and yeast extract agar describes the capacity for phosphate solubilization and biological nitrogen fixation, respectively. The influence of both strains in promoting chili plant growth was assessed from a pot treatment. Essentially, it was found that both strains showed positive results in the compound detection analysis. Furthermore, the treatment using PGPB on chili plants showed an increase of 62.9 % in height and 57.1 % in number of leaves. In conclusion, A4 and A8 were strongly recommended for PGPB. Keyword(s) : Plant growth-promoting bacteria (PGPB); plant growth-promoting compounds; Indole-3-Acetic Acid (IAA); phosphate solubilization; biological nitrogen fixation (BNF)
FILM POLIELEKTROLIT BERBASIS KARAGENAN UNTUK LUKA BAKAR MENGGUNAKAN GETAH JATROPHA CURCAS
Authors: Zakaria Mohamad Rahmatullah
Published: February 2024

Luka bakar derajat dua merupakan luka yang sering terjadi akibat kecelakaan dan memiliki nilai mortalitas yang tinggi. Pengembangan pembalut luka bakar primer seperti “film polielektrolit” dapat dilakukan untuk mengontrol pelepasan zat aktif dan menjaga kelembaban luka. Efektivitas film ini dapat ditingkatkan dengan penambahan getah dari tanaman Jarak Pagar (Jatropha curcas) yang secara ilmiah memiliki aktivitas dalam penyembuhan luka seperti Flavonoid, Saponin dan Tanin. Matriks dari Film Polielektrolit memiliki kemampuan yang baik apabila dibentuk dari biopolimer yang biodegredibel dan biokompatibel serta nontoksik seperti Karagenan dan Kitosan. Karagenan diekstrak dari Alga Merah (Eucheuma spinossum) dengan metode maserasi. Karagenan dikombinasikan dengan Kitosan sebagai polimer penyusun film polielektrolit dievaluasi meliputi Uji Organoleptik, Uji Ratio Swelling, dan Uji Fraksi Gel. Formula terbaik di uji iritasi selama 3 x 24 jam dan kemudian diuji efektivitas terhadap 5 kelompok hewan uji mencit dengan perlakuan berbeda yakni PE/JS0 (film polielektrolit); JS5 (getah 5%); JS10 (getah 10%); PE/JS5 (film polielektrolit dengan getah 5%); dan PE/JS10 (film polielektrolit dengan getah 10%). Dimana pengukuran penurunan dievaluasi secara statistik menggunakan metode One Way – Anova (α=0,05). Hasil menunjukan formula PE/JS10 memiliki aktivitas penyembuhan luka sebesar 100% selama 14 hari.
Subcutaneous hydromorphone hydrochloride provides antinociception with transient adverse effects in four-toed hedgehogs (Atelerix albiventris)
Authors: Peterson Macy L. , Mans Christoph , Doss Grayson A.
Published: February 2024

OBJECTIVE

To evaluate the efficacy and safety of hydromorphone administered SC in four-toed hedgehogs (Atelerix albiventris).

ANIMALS

12 healthy adult hedgehogs.

METHODS

Hedgehogs underwent 2 randomized, blinded, placebo-controlled, complete crossover studies. Hind limb withdrawal latencies in response to an acute thermal noxious stimulus were measured to evaluate the antinociceptive efficacy of hydromorphone. Baseline latencies were obtained prior to injection and collected again at 0.5, 1, 2, 4, and 6 hours following injection. Based on pilot studies, single doses of SC hydromorphone at 0.15 and 0.3 mg/kg were evaluated for efficacy in crossover trials. Safety of single (0.15 and 0.3 mg/kg) and multiple doses of hydromorphone (0.3 mg/kg, SC, q 4 h, for 3 doses) was also assessed. In addition to monitoring behavior during latency measurements, animals were evaluated for overt sedation and daily changes in food intake, body weight, and running wheel activity for 6 days after injection to evaluate for adverse effects.

RESULTS

Hydromorphone at 0.15 mg/kg provided antinociception lasting < 4 hours, and 0.3 mg/kg provided antinociception lasting < 6 hours. Hydromorphone produced transient abnormal behaviors at both doses, including vocalization, chewing motions of the jaw, and paw raising. There were no statistically significant differences in body weight or running wheel activity between treatments for single or multiple doses of hydromorphone. Three doses of 0.3 mg/kg hydromorphone (q 4 h) produced a statistically significant decrease (median, –9.7%; range, –64% to 10%) in 6-day total food intake.

CLINICAL RELEVANCE

Subcutaneous hydromorphone (0.15 to 0.3 mg/kg) can be used for short-term antinociception with transient adverse effects in hedgehogs.
DO COMPANY PRODUCTIVITY, PRICE-EARNINGS RATIO, AND EFFECTIVE TAX RATE AFFECT FIRM VALUE?
Authors: Marvin William , Christina Silvy
Published: February 2024

Investors look for companies with growing firm value and are eager to know the factors that affect it. Other research that has been conducted previously relating to factors that influence company value shows different results. This is the motivation for researchers to conduct research which is a development of previous research. The purpose of this study is to obtain empirical evidence about the effect of firm size, company productivity, firm age, price earning ratio, profitability, leverage, effective tax rates, and audit quality on firm value. The sample used in this research is manufacturing companies listed on the Indonesia Stock Exchange consistently from 2016 until 2018. The sample selection method used was purposive sampling, there were 75 companies met the criteria, resulting in 225 data being taken as samples. Research data were analyzed by doing hypothesis tests using multiple regression methods to determine the model of research. The results of this study show that firm size, profitability, and leverage affect firm value. company productivity, firm age, price earning ratio, effective tax rates, and audit quality do not affect the value of the firm.
KAJIAN KEPUASAN WISATAWAN TERHADAP LOYALITAS DESTINASI WISATA PANTAI KUTA BALI DI INDONESIA
Authors: Alvin  , Tunjungsari Hetty Karunia
Published: February 2024

Pantai Kuta merupakan salah satu destinasi wisata yang sampai saat ini banyak dikenal oleh wisatawan baik domestik maupun mancanegara. Tujuan penelitian ini adalah untuk menguji apakah Perceived Service Quality, Perceived Value merupakan prediktor positif terhadap Destination Loyalty dan Tourist Satisfaction. Penelitian ini melibatkan 200 sampel dari kalangan mahasiswa yang pernah berkunjung ke Pantai Kuta, Bali, untuk tujuan berwisata lebih dari 1 kali. Teknik pengambilan sampel yang dipilih adalah dengan menggunakan convenience sampling. Data yang diperoleh kemudian diolah dengan menggunakan PLS-SEM versi 3. Hasil penelitian ini menunjukkan bahwa Perceived Value memiliki pengaruh yang positif terhadap Tourist Satisfaction dan Destination Loyalty, adapun Perceived Service Quality tidak memiliki pengauh yang signifikan pada kedua variabel dependen. Implikasi hasil penelitian ini dapat menjadi masukan bagi organisasi manajemen destinasi (DMO), khususnya wisata pantai, dalam membuat strategi untuk meningkatkan kepuasan dan loyalitas wisatawan. Secara teoretis, implikasi hasil penelitian ini memberikan pengembangan pada kajian mengenai kepuasan dan loyalitas wisatawan.
 
Kuta Beach is a tourist destination that is widely known by both domestic and foreign tourists. The purpose of this study is to examine whether Perceived Service Quality and Perceived Value are positive predictors of Destination Loyalty as well as Tourist Satisfaction. This study involved 200 samples from students who had visited Kuta Beach, Bali, more than 1 time for the purpose of vacation. The sampling technique chosen is to use convenience sampling. The data obtained was then processed using PLS-SEM version 3. The results of this study show that Perceived Value has a positive influence on Tourist Satisfaction and Destination Loyalty, while Perceived Service Quality does not have a significant influence on both variables. The implications of this study can be suggestions for destination management organization (DMO), especially beach tourism, in making strategies to increase tourist satisfaction and loyalty. Theoretically, the implications of the results of this study provide development in the study of tourist satisfaction and loyalty.
FAKTOR PENENTU KINERJA INOVASI PEMIMPIN MAL DI JAKARTA: PERAN ORIENTASI KEWIRAUSAHAAN DAN KEPEMIMPINAN KEWIRAUSAHAAN
Authors: Bramaputri Sia Lily , Marizar Eddy Supriyatna
Published: February 2024

Kinerja inovasi para pimpinan mal sangat penting bagi kelangsungan mal di Jakarta. Oleh karena itu, perlu ditingkatkan. Kinerja inovasi pemimpin mal di Jakarta dapat ditingkatkan salah satunya dengan cara meningkatkan orientasi kewirausahaan dan kepemimpinan kewirausahaan. Tujuan penelitian ini adalah agar dapat melakukan analisis faktor yang menentukan kinerja inovasi pimpinan mal di Jakarta. Metode penelitian yang digunakan adalah metode penelitian kuantitatif dan dilakukan di Jakarta dengan subjek penelitian adalah pimpinan mall yang berada di bawah kelompok XYZ. Data penelitian didasarkan pada sumber data primer yaitu melalui survei dengan menggunakan kuesioner berdasarkan tiga variabel yang ingin diukur yaitu orientasi kewirausahaan, kepemimpinan kewirausahaan, dan kinerja inovasi. Dari populasi tersebut diambil sampel penelitian sebanyak 129 orang berdasarkan metode simple random sampling. Penelitian ini memberikan hasil bahwa orientasi kewirausahaan serta kepemimpinan kewirausahaan memberikan pengaruh positif dan signifikan terhadap kinerja inovasi pimpinan mal di bawah kelompok XYZ. Kontribusi penelitian ini adalah penelitian ini dapat menjadi rujukan dalam mengembangkan berbagai program dasar kepemimpinan bagi para pemimpin mal dengan memperhatikan kapasitas orientasi kewirausahaan dan kepemimpinan kewirausahaan.
 
The innovation performance of mall leaders is very important for the survival of malls in Jakarta. Therefore, it needs to be improved. Several factors that can improve the innovation performance of mall leaders in Jakarta are entrepreneurial orientation and entrepreneurial leadership. The aim of this research is to be able to analyze the factors that determine the innovation performance of mall leaders in Jakarta. The research method used was a quantitative research method and was carried out in Jakarta with the research subjects being mall leaders under the XYZ group. Research data is based on primary data sources, namely through surveys using questionnaires based on the three variables to be measured, namely entrepreneurial orientation, entrepreneurial leadership, and innovation performance. From this population, a research sample of 129 people was taken based on the simple random sampling method. This research shows that entrepreneurial orientation and entrepreneurial leadership have a positive and significant influence on the innovation performance of mall leaders under the XYZ group.
DAMPAK LAMA PENGISIAN BATERAI PADA MOBIL LISTRIK TERHADAP MINAT CALON PEMBELI
Authors: Putra Ridwan Brata Pratama
Published: February 2024

Electric cars are transportation with new types of fuel that are being hotly discussed by the public, with the rising price of fossil fuels, making people choose to switch to electric cars to be more efficient and environmentally friendly. Electric cars themselves have many advantages for the environment in addition to not emitting air pollution, electric cars also do not emit noise pollution, which electric cars are very impermeable and do not emit sound. However, chargers in electric cars are one of the main things so that electric cars can be used, chargers are used to charge electric cars. To charge an electric car battery, it takes a long time until the battery is fully charged. Therefore this study will conduct an analysis by reviewing public knowledge of electric cars and how people perceive the long charging time of electric cars. As well as explaining the influence of age, gender, occupation, domicile, monthly spending on cars, intensity of car use, and the government on the impact of long battery charging durations on electric cars on the interest of prospective buyers. The author uses a survey method in the form of an online questionnaire as a means of collecting research data. Testing this research using the One Sample T-Test method in testing the research instrument and followed by the Independent Sample T-Test to test the relationship between two populations that are not related to each other. Based on the results of the analysis, it can be seen that the majority of people still want to buy an electric car even though the duration of charging the battery or power is long.
HUBUNGAN TARIF ELECTRONIC ROAD PRICING DENGAN KINERJA JALAN
Authors: Pangestu Kenneth Putra , Najid
Published: February 2024

Electronic Road Pricing (ERP) adalah cara untuk meningkatkan biaya penggunaan kendaraan pribadi dimanapengguna kendaraan pribadi dikenakan biaya untuk melintasi jalan dan diharapkan beralih menggunakantransportasi umum. Sistem ERP biasanya menggunakan kombinasi sensor dan kamera untuk mendeteksi lalu lintaskendaraan di jalan seperti In-Vehicle Unit untuk mengumpulkan biaya secara otomatis. Responden dalam penelitianini beraktivitas dari pukul 06.00 - 18.00 WIB dan berjumlah kurang lebih sebanyak 100 orang. Pengumpulan dataakan dilakukan dengan menggunakan kuesioner melalui Google Form. Mengetahui bagaimana sistem tarif ElectronicRoad Pricing (ERP) di kota DKI Jakarta. Penelitian ini akan membahas peraturan dan kebijakan apa saja mengenaitarif yang akan diterapkan pada Electronic Road Pricing (ERP) di kota DKI Jakarta, mengetahui hubungan antarapelayanan dan tarif.Kata kunci: Electronic Road Pricing, ERP, tarif, sistem tarif

Electronic Road Pricing (ERP) is a way to increase the cost of private vehicle use where private vehicle users arecharged for crossing roads and are expected to switch to using public transportation. ERP systems typically use acombination of sensors and cameras to detect vehicle traffic on the road such as In-Vehicle Units to collect the feesautomatically. Respondents in this study are on the move from 06.00 - 18.00 WIB and total approximately 100 people.Data collection will be conducted using a questionnaire through Google Form. Knowing how the Electronic RoadPricing (ERP) tariff system in DKI Jakarta city. This research will discuss what regulations and policies regardingtariffs that will be applied to Electronic Road Pricing (ERP) in the city of DKI Jakarta, knowing the relationshipbetween services and tariffs.Keywords: Electronic Road Pricing, ERP, tariff, tariff system
KINERJA OJEK ONLINE DAN KONVENSIONAL DI KOTA KENDARI
Authors: Soeparyanto Try Sugiyarto , Royani Waode , Arsyad La Ode Muhammad Nurrakhmad , Statiswaty
Published: February 2024

This study aims to measure the performance of two-wheeled public transportation, online and conventional motorcycle taxis. Snowballing technology penetrates the transportation sector and provides convenience and flexibility at users' fingertips. Users are faced with a choice of online and conventional transportation that still survives today. Using the perception assessment approach, the Customer Satisfaction Index (CSI) and Importance Performance Analysis (IPA) methods use a Likert rating scale for users who use online motorcycle taxis and conventional motorcycle taxis. There are five variables: Tangible, Reliability, Responsiveness, Assurance, and Empathy. The results show that CSI for online motorcycle taxis has a value of Very Satisfied to Satisfied. In contrast, for conventional motorcycle taxis, there is a variable with a value of Very Dissatisfied, namely Reliability, and Assurance has a value of Fairly Satisfied. Other than that, it's worth Very Satisfying. The IPA method describes these variables into 56 attributes, detailed in 11 attributes in Quadrant I, namely the Top Priority category, and 17 attributes in Quadrant II, namely Maintain Achievement. The others are included in Quadrants III and IV with low importance.
Abstrak
Penelitian ini bertujuan untuk mengukur kinerja angkutan umum roda dua, ojek online dan konvensional. Penggunaan teknologi yang berkembang pesat merambah hingga ke sektor transportasi dan memberikan kemudahan serta fleksibilitas di ujung jari pengguna. Pengguna dihadapkan dengan pilihan akan transportasi online maupun konvensional yang masih bertahan hingga kini. Dengan pendekatan penilaian persepsi metode Customer Satisfaction Index (CSI) dan Importance Performance Analysis (IPA) menggunakan skala penilaian Likert terhadap masyarakat pengguna yang menggunakan ojek online dan ojek konvensional. Terdapat 5 variabel yaitu: Tangible, Reliability, Responsiveness, Assurance, dan Empathy. Hasil menunjukkan bahwa CSI untuk ojek online bernilai Sangat Puas hingga Puas, sedangkan untuk ojek konvensional terdapat variabel yang bernilai Sangat Tidak Puas yaitu Reliability, dan Assurance bernilai Cukup Puas. Selain itu bernilai Sangat Puas. Metode IPA menjabarkan variabel tersebut ke dalam 56 atribut, yang terinci pada 11 atribut dalam Kuadran I yaitu kategori Prioritas Utama, 17 atribut dalam Kuadran II yaitu Pertahankan Prestasi. Adapun lainnya masuk dalam Kuadran III dan IV dengan kepentingan rendah.
ANALISIS DISTRIBUSI TEGANGAN ARAH HORIZONTAL DENGAN SAMBUNGAN BAUT PADA PELAT TARIK MENGGUNAKAN SOFTWARE AUTODESK INVENTOR
Authors: Halim Kritananda Tantra , Leman Sunarjo
Published: February 2024

Steel a crucial element that is often used in construction because of its efficient workmanship and high tensile strength. Several types of connections will affect the modeling and analysis of the structure in the early stages of planning. The distribution in steel bolted joints will vary depending on plate dimensions and bolt arrangement. The stress that occurs in the steel plate will affect the distribution of stress on each bolt. This study analyzes the distribution of forces in tension bolt connections using the FEM Autodesk Inventor. This research conducted using steel plate (fy = 780 Mpa and E = 205000 MPa) and bolt ISO 4010, nut ISO 4032, washer ISO 7090. The results showed that compressive stress distribution in horizontal direction on plates and bolts is in the form of a parabolic curve with the outermost edge having a value compressive stress which is greater than the inner edge compressive stress with a difference of about 30% -45%. On the outer edges of the plate there is a considerable tensile stress of 300% -500%. This study produced an equation for the distribution of horizontal compressive stresses for each bolt configuration. Increasing number of bolts, the compressive stress in the horizontal direction will be more evenly distributed.
Abstrak
Baja merupakan elemen krusial yang sering digunakan dalam konstruksi karena pengerjaannya yang efisien dan memiliki kuat tarik yang cukup tinggi. Beberapa tipe sambungan akan mempengaruhi permodelan dan analisis struktur pada tahap awal perencanaan. Distribusi pada sambungan baut baja tentu akan bervariasi bergantung pada dimensi pelat dan susunan baut. Besaran tegangan yang terjadi pada pelat baja akan mempengaruhi juga distribusi tegangan pada setiap bautnya. Penelitian ini menganalisis distribusi gaya pada sambungan baut tarik menggunakan metode elemen hingga dengan menggunakan Autodesk Inventor (2023). Penelitian ini dilakukan menggunakan pelat baja dengan fy = 780 Mpa dan E = 205000 MPa dan jenis baut ISO 4010, mur ISO 4032, washer ISO 7090. Hasil penelitian menunjukan bentuk distribusi tegangan tekan arah horizontal pada pelat dan baut berbentuk kurva parabolik dengan tepi terluar yang memiliki nilai tegangan tekan yang lebih besar dari tegangan tekan tepi dalam dengan perbedaan sekitar 30%-45.  Pada bagian tepi terluar kiri maupun kanan pelat terjadi tegangan tarik yang cukup besar sebesar 300%-500%. Penelitian ini juga menghasilkan persamaan distribusi tegangan tekan arah horizontal pada setiap konfigurasi baut dan pelat. Dengan bertambahnya jumlah susunan baut maka tegangan tekan arah horizontal akan terdistribusi lebih merata.
ANALISIS DAYA DUKUNG DAN PENURUNAN TIANG PADA BATUAN LEMPUNG DENGAN BERBAGAI DIAMETER
Authors: Zai Elbert Conroy , Prihatiningsih Aniek
Published: February 2024

In several locations in Indonesia found soil that is claystone. Claystone itself is soil composed of solid grains resulting from weathering. Claystone is very cohesive and has low permeability. In the construction of multi-storey buildings on claystone, it is necessary to pay attention to the weight bearing. Stable strength is required to resist settlement along the shear plane. In foundation planning, problems often occur regarding the amount of settlement. Expansive soil contains minerals that expand and affect changes in water content. Claystone is a type of expansive soil that will expand or increase in volume when it contracts with water. The condition of the soil below the surface is one of the factors that can affect its decline. The foundation used is the drilled pile foundation. Soil data taken in East Kalimantan. Carrying capacity will be calculated and find out the amount of settlement that will occur in the soil. In this research, we will find out the foundation strength for various diameters at a depth of 6000 for a 20-storey building on claystone.
Abstrak
Di beberapa lokasi di Indonesia ditemukan tanah yang bersifat batuan lempung. Batuan Lempung sendiri adalah tanah yang tersusun dari butiran padat hasil pelapukan. Batuan lempung sangat kohesif dan bersifat permeabilitas rendah. Dalam pembangunan gedung bertingkat di atas batuan lempung perlu diperhatikan dalam menahan beban. Diperlukan kekuatan yang stabil untuk menahan penurunan disepanjang bidang geser. Dalam perencanaan fondasi sering terjadi masalah terhadap besarnya penurunan. Tanah ekspansif mengandung mineral-mineral yang bersifat mengembang dan berpengaruh terhadap perubahan kadar air. Batuan lempung termasuk jenis tanah ekspansif yang akan mengalami pengembangan atau peningkatan volume apabila berkontraksi dengan air. Kondisi tanah yang berada di bawah permukaan menjadi salah satu faktor yang dapat mempengaruhi penurunannya. Fondasi yang digunakan fondasi tiang bor. Diambil data tanah di Kalimantan Timur. Akan dilakukan perhitungan daya dukung, dan mengetahui besar penurunan yang akan terjadi pada tanah. Dalam penilitian ini akan mengetahui kekuatan fondasi untuk berbagai diameter pada kedalaman 6000 terhadap bangunan 20 lantai pada tanah batuan lempung.