bluuebunny/crossref_metadata_2025 huggingface dataset:
Predicting Coronal Mass Ejection Arrival Times with Thirty-Minute Accuracy
Authors: Toth Gabor
Published: January 2023

J. Schmidt and Cairns (2019) have recently shown that they can predict
Coronal Mass Ejection (CME) arrival times with an accuracy of 0.9+-1.9
hours for four separate events. They also showed that the accuracy gets
better with increased grid resolution. Here, we further improve these
results by using the Richardson extrapolation (Richardson and Gaunt,
1927), which is a standard technique in computational fluid dynamics,
and predict the CME arrival time with 0.2+-0.26 hours accuracy. The CME
arrival time errors of the new model lie in a 95% confidence interval
[-0.21,0.61] h. We also show that the probability of getting these
accurate arrival time predictions with a model with a standard deviation
exceeding 2 hours is less than 0.1%, indicating that the excellent
results cannot be due to random chance, and the Richardson extrapolation
has indeed improved the original model by J. Schmidt and Cairns (2019).
This unprecedented accuracy is about 40 times better than the current
state-of-the-art prediction of CME arrival times with an average error
of about +-10 hours. The new model uses information available within a
few hours after the CME eruption and it can run much faster than
real-time on a couple of CPU cores. Based on the result, we recommend
the new model to be transitioned to operations as soon as possible to
better protect our space-born and ground-based assets from the harmful
effects of space weather.
Effects of Tide and Wave on the Transport of Water and Sediments off the Yellow River Mouth in Winter
Authors: Cheng Xinyue , Zhu Jianrong , Chen Shenliang
Published: January 2023

The fresh water and sediments transport from the Yellow River mouth
downstream along the coast into the Laizhou Bay under the northeasterly
wind in winter. The sediment transport is convergence in the river
mouth, divergence in the downstream area, and convergence in the north
of Laizhou Bay. Tide and wave are the two main forcings affecting the
transport of water and sediments off river mouths. For the
high-turbidity Yellow River mouth and the adjacent sea, tidal forcing
enhances the subtidal downstream transport of water and sediments off
the river mouth into the Laizhou Bay, whereas wave forcing has little
effect on the advection of water and sediments. The sediment
resuspension is controlled by the bottom shear stress induced by tide
and wave. The tide-induced bottom shear stress is higher in the north of
Laizhou Bay and south of Bohai Bay due to the stronger bottom tidal
current. The wave-induced bottom shear stress plays a more important
role in sediment resuspension, which is higher in the nearshore region
along the Yellow River Delta away from the coast to some extent on
account of the maximum near-bottom wave orbital velocity. Tidal mixing
strengthens the upward diffusion of bottom suspended sediments. Without
tidal forcing, the decreased bottom shear stress suspends less sediment
above bed. On the other hand, the enhanced stratification hinders the
upward diffusion of the bottom sediment due to the lack of tidal mixing,
resulting in higher suspended sediment concentration (SSC) in the bottom
layer in the offshore region.
Observations of gravity waves in the OH airglow layer above Rothera (68S, 68W) using a three-dimensional S-Transform analysis
Authors: Dempsey Shaun Martin , Hindley Neil P , Wright Corwin James , Mitchell Nicholas , Moffat-Griffin Tracy , Pautet Pierre-Dominique , Taylor Michael J.
Published: January 2023

In this study, we apply the three-dimensional Stockwell Transform (3DST)
to a novel dataset, namely airglow imager data from Rothera (68S, 68W).
We use this approach to investigate small-scale high-frequency gravity
waves (GWs) in the hydroxyl (OH) airglow layer, at a height
$\sim$87 km in the mesosphere and lower thermosphere
(MLT). MLT GWs are often underrepresented in models, being parameterised
due to their small scale size and as such, the significant quantities of
momentum and energy transferred by these small waves are missed. Better
quantification of these waves is thus needed to support future model
development. We find that the 3DST can identify waves and extract wave
properties and their locations. Horizontal wavelengths are observed
ranging from 10 to 40 km and vertical wavelengths of 15 to 40 km, with
wave periods of 5 to 9 minutes, peaking at 7.5 minutes. These values are
consistent with previous studies. Group speeds are found to be non-zero
and large, implying that these GWs travel horizontally and fast. This
case study demonstrates that the 3DST can be applied to airglow imager
data and can successfully extract GW parameters. This is an important
step in automating GW analysis in airglow.
Mechanisms of Ageostrophic Wind Convergence in the Boundary Layer of Coastal Warm-Sector Extreme Heavy Rainfall
Authors: Xia Fan , Huang Xiaogang , Fei Jianfang , Wang Ju , Cheng XiaoPing , Zhang Chi
Published: January 2023

The South China coast has a high incidence of warm-sector heavy rainfall
(WSHR) events. The ageostrophic winds in the boundary layer in most of
these events associated with the southwesterly boundary layer jets
(BLJs) mainly exhibit strong convergence at rainfall area. In this
paper, we analyze two cases of WSHR in May 2013 and May 2015, which
occurred in similar synoptic environments but varied in intensity,
extent, and duration of rainfall, where the ageostrophic winds are the
confrontational confluence and asymptotic confluence pattern,
respectively. ERA-5 reanalysis data and the diagnostic equation of
ageostrophic wind are used to examine the factors affecting the
ageostrophic winds in the northern land region and the southern offshore
region of the rainfall. The results suggest that land-sea contrast leads
to the convergence of ageostrophic winds in the rainfall area. Boundary
layer friction dominates the northeasterly ageostrophic winds on land.
The diurnal variation of BLJs dominates the ageostrophic winds and their
diurnal variation at sea, contributing southwesterly or southeasterly
ageostrophic winds, so the phase difference between the land and sea
forms confrontational or asymptotic confluence, respectively. BLJs with
different intensities, extents, and diurnal variations can lead to
different ageostrophic wind patterns and their confluence modes. The
land-sea thermal contrast can directly affect ageostrophic winds, and it
can also affect the diurnal variation of BLJs, thus affecting the
ageostrophic winds and their confluence mode. It is further verified
that the BLJs and thermal forcing are important in warm-sector heavy
rainfall processes in South China.
Impact of Diurnal Warm Layers on Atmospheric Convection
Authors: Shevchenko Radomyra , Hohenegger Cathy , Schmitt Mira
Published: January 2023

This manuscript presents a study of oceanic diurnal warm layers in
kilometer-scale global coupled simulations and their impact on
atmospheric convection in the tropics. With the implementation of thin
vertical levels in the ocean, diurnal warm layers are directly resolved,
and sea surface temperature (SST) fluctuations of up to several Kelvin
appear in regions with low wind and high solar radiation. The increase
of SST during the day causes an abrupt afternoon increase of atmospheric
moisture due to enhanced latent heat flux, followed by an increase in
cloud cover and cloud liquid water. However, although the daily SST
amplitude is exaggerated in comparison to reanalysis, this effect only
lasts for 5-6 hours and leads to an absolute difference of 1% for cloud
cover and 0.01 kg m-2 for cloud liquid water. All in all, the impact of
diurnal warm layers on convective cloud cover is found to be negligible
in the tropical mean.
Long-living Earthquake Swarm and Intermittent Seismicity in the Northeastern Tip of the Noto Peninsula, Japan
Authors: Amezawa Yuta , Hiramatsu Yoshihiro , Miyakawa Ayumu , Imanishi Kazutoshi , Otsubo Makoto
Published: January 2023

The factors controlling earthquake swarm duration are remain unclear,
especially in the long-living ones. A severe earthquake swarm struck the
tip of the Noto peninsula, Japan. Ten M > 4.0 earthquakes
occurred, and the sequence has continued more than four years. We
investigated the spatiotemporal characteristics of the swarm using
relocated hypocenters to elucidate the factors causing this long
duration. The swarm consists of four seismic clusters-northern,
northeastern, western, and southern-the latter of which began first.
Diffusive hypocenter migrations were observed in the western, northern,
and northeastern clusters with moderate to low diffusivities, implying a
low-permeability environment. Rapid diffusive migration associated with
intermittent seismicity deep within the southern cluster suggests the
presence of a highly pressurized fluid supply. We conclude that the
nature of this fluid supply combined with intermittent seismicity from
the southern cluster and a low-permeability environment are the key
causes of this long-living swarm.
River delta morphotypes emerge from multiscale characterization of shorelines
Authors: Vulis Lawrence , Tejedor Alejandro , Ma Hongbo , Nienhuis Jaap H , Broaddus Connor , Brown Jack , Edmonds Douglas Arthur , Rowland Joel Carey , Foufoula-Georgiou Efi
Published: January 2023

Delta shoreline structure has long been hypothesized to encode
information on the relative influence of fluvial, wave, and tidal
processes on delta formation and evolution. We introduce here a novel
multiscale characterization of shorelines by defining three
process-informed morphological metrics. We show that this
characterization yields self-emerging classes of morphologically similar
deltas, i.e., delta morphotypes, and also predicts the dominant forcing
of each morphotype. Then we show that the dominant forcings inferred
from shoreline structure generally align with those estimated via
relative sediment fluxes, while positing that misalignments arise from
spatiotemporal heterogeneity in deltaic sediment fluxes not captured in
their estimates. The proposed framework for shoreline characterization
advances our quantitative understanding of how shoreline features
reflect delta forcings, and may aid in deciphering paleoclimate from
images of ancient deposits and projecting delta morphologic response to
changes in sediment fluxes.
Simulating the effects of regional forest cover changes on mid-latitude boundary-layer clouds.
Authors: Noual Gaëtan , Brunet Yves , Moigne Patrick Le , Lac Christine
Published: January 2023

Evidence has been provided that land-cover changes such as deforestation
can have an impact on cloudiness and precipitation. However, conflicting
results have been obtained at different scales and places, highlighting
our poor understanding of the physical processes involved. Here we focus
on mesoscale summer cloudiness in a temperate region, as influenced by a
large forest massif (the Landes forest in France). Our study is based on
an up-to-date atmosphere-surface mesoscale model (Meso-NH coupled with
SURFEX). Based on observational data, we first optimise the model
configuration for our purpose, and show that with a 500 m horizontal
resolution we can successfully simulate the higher summer cloud cover
observed over the forest, compared to its surroundings. Secondly, we
investigate the physical processes leading to cloud formation in a
representative case study. Based on a comparative analysis of
diagnostics and budgets over forest and non-forest areas, we find that
the larger sensible heat flux over the forest and its higher roughness
are the main drivers of cloudiness, enhancing vertical velocity and
boundary-layer mixing. Third, we simulate the impact of the 2009 Klaus
storm that led to the loss of about one third of the trees. Considering
fifteen representative convective summer days, we show that the model
simulates well the resulting decrease in summer cloudiness that was
reported in a previous study based on satellite observations. As a
complementary tool, the mesoscale simulations allow to quantify the
impacts of the Klaus storm windthrough on the diurnal cycle of the
boundary layer.
Fluid reservoir in the Hyuga-nada accretionary prism near the Kyushu-Palau ridge: insights from a passive seismic array
Authors: Akuhara Takeshi , Yamashita Yusuke , Ohyanagi Shukei , Sawaki Yasunori , Yamada Tomoaki , Shinohara Masanao
Published: January 2023

Shear wave velocity (Vs) estimations of accretionary prisms can pose
unique constraints to the physical properties of rocks, which are hard
to obtain from compressional velocities (Vp) alone. Thus, it would help
better understand the fluid processes of the accretion system. This
study investigates the Vs structure of the Hyuga-nada accretionary prism
using an array of ocean-bottom seismometers (OBSs) with a 2 km radius.
Teleseismic Green’s functions and a surface wave dispersion curve are
inverted to one-dimensional Vs structures using transdimensional
inversion. The results indicate the presence of a low-velocity zone 3–4
km below the seafloor. The reduced Vs is consistent with a reduced Vp
feature obtained in a previous seismic refraction survey. From its high
Vp/Vs ratio, we conclude that the low velocities represent high pore
fluid pressure. In addition, the resolved lithological boundary exhibits
a sharp offset that extends laterally across the OBS array. We attribute
this offset to a blind fault below while acknowledging other
possibilities, such as due to mud diapirism. The predicted fault is
located at the Kyushu–Palau Ridge flank, oriented roughly parallel to
the ridge axis, and thus likely caused by ridge subduction. The fracture
caused by the ridge subduction may act as a fluid conduit, forming a
fluid reservoir beneath the well-compacted sediment layers.
Whitewater Sound Dependence on Discharge and Wave Configuration at an Adjustable Wave Feature
Authors: Tatum Taylor A , Anderson Jacob F , Ronan Timothy J
Published: January 2023

Stream acoustics has been proposed as a means of monitoring discharge
and wave hazards from outside the stream channel. To better understand
the dependence of sound on discharge and wave characteristics, this
study analyzes discharge and infrasound data from an artificial wave
feature. This feature, known as Boise Whitewater Park: Phase 1 (BWPP1),
is adjusted to accommodate daily changes in recreational use and
seasonal changes in irrigation demand. Significant sound is only
observed when discharge exceeds ~35 m3/s, and even above
that threshold the sound-discharge relationship is non-linear and
inconsistent. When sound is observed, it shows consistent dependence on
wave type within a given year, but the direction of this dependence
varies among the three years studied (2016, 2021, and 2022). These
findings support previous research that establishes discharge and stream
morphology as significant controls on stream acoustics and highlights
the complex, combined effects of these variables.
Equations of state for B2 and bcc Fe1-xSix
Authors: Nagaya Yoshihiro , Gomi Hitoshi , Ohta Kenji , Hirose Kei
Published: January 2023

Composition, chemical disorder, and magnetism significantly affect the
volume and bulk modulus of iron–silicon (Fe–Si) alloys at ambient
pressure. Here, we computed the equations of state for bcc-like (ordered
B2 and disordered bcc) Fe–Si alloys available up to the inner-core
pressure using the first-principles Korringa–Kohn–Rostoker method.
Ferromagnetic (FM) and nonmagnetic (NM) states over a wide composition
range, from Fe to FeSi, were investigated. The results revealed that
magnetism and chemical disorder increased the volume and decreased the
bulk modulus even at high pressures. Comparing the results with the
preliminary reference Earth model, we found that an unrealistically
large temperature gradient is required if the inner core is composed of
a bcc-like Fe–Si alloy.
Understanding the mechanisms for tropical surface impacts of the quasi-biennial oscillation (QBO)
Authors: Garcia-Franco Jorge Luis , Gray Lesley J , Osprey Scott M. , Chadwick Robin , Lin Jonathan
Published: January 2023

This study evaluates the main hypotheses to explain a coupling between
the quasi-biennial oscillation (QBO) in the tropical stratosphere and
the tropical troposphere and surface. The impact of the QBO on tropical
convection and precipitation is investigated through nudging experiments
using the UK Met Office Hadley Centre Unified Model (UM). The model
control simulations show robust links between the internally generated
QBO and tropical precipitation and circulation. The model zonal wind in
the tropical stratosphere was nudged above 90 hPa in atmosphere-only and
coupled ocean-atmosphere configurations. The simulation of convection
and precipitation in the atmosphere-only simulations is not
statistically significantly different between the experiments with and
without nudging, which may indicate that SST-convection coupling is
needed for any QBO influence on the tropical lower troposphere and
surface. In the coupled experiments, the precipitation and SST
relationships with the QBO phase disappear when nudging is applied.
Evidence from the nudging experiments shows that the QBO influence over
lower stratospheric static stability is not sufficient to produce
tropical surface impacts. The nudging also reduced the influence of the
lower troposphere to the upper branch of the Walker circulation,
irrespective of the QBO, indicating that the upper troposphere has been
slightly decoupled from the surface by the nudging. These results
suggest that nudging all grid-points might mute relevant feedback
processes, including high cloud radiative effects and wave mean flow
interactions, occurring at the tropopause level.
Groundwater level simulations using wavelet transform-assisted deep learning models
Authors: Chidepudi Sivarama Krishna Reddy , Massei Nicolas , Jardani Abderrahim , Henriot Abel , Allier Delphine , Baulon Lisa
Published: January 2023

The development of groundwater levels (GWL) simulations, based on deep
learning (DL) models, is gaining traction due to their success in a wide
range of hydrological applications. GWL Simulations allow generating
reconstructions to be used for exploring past temporal variability of
groundwater resources or provide means to generate projections under
climate change on decadal scales. Owing to the diversity of large-scale
and local scale forcing factors involved in explaining GWL variability,
machine learning or even deep learning approaches reveal relevant tools
to simulate GWL. In addition, such methods do not require too
much-extended knowledge of physical variables in the links between
climate variables and GWL.

In this paper, we investigated the capacities of three deep learning
models (Long Short-Term Memory (LSTM), Gated Recurrent Unit (GRU) and
Bidirectional LSTM (BLSTM)) to reproduce GWL variations over time. Among
the three deep learning models, GRU performed relatively better in most
cases. Another aspect was to evaluate the input data’s impact and
usefulness of wavelet pre-processing considering its limitations and
best practices. Two different input datasets are compared to each other,
one considering Effective Precipitation only, the other considering
Precipitation and Temperature.

Maximum Overlap Discrete Wavelet Transform (MODWT) preprocessing was
used to decompose the input variables to explore the impact of wavelet
transform in improving the simulations on several types of GWL time
series by unravelling “hidden” though useful information in input
data. Results show that the preprocessing (MODWT) helps the models
generate better simulations. This improvement is higher with raw climate
data (precipitation & temperature) as compared to when effective
precipitation was used as input. Finally, the Shapley Additive
exPlanations (SHAP) approach was used to interpret the impact of input
variables on the model simulations. Analysis of SHAP values indicated
that the sources of the information content preferentially learned by
the models to achieve best simulations. For instance, it was clear that
simulation of inertial and mixed GWL required the models to learn from
low-frequency variability presented in the input data.
Linear frequency modulation infrared thermal imaging detection technology for GFRP/PMI foam sandwich structure defects
Authors: Song Ya-Fei , Tang Qing-Ju , Bu Chi-Wu , Lu Yu-Mei , Xu Peng
Published: January 2023

As one of the important structures of composite materials, polymethacrylimide (PMI) foam sandwich structure is prone to debonding and delamination defects during manufacturing and service, which seriously affects the mechanical properties of materials. Therefore, it is necessary to detect the defects of foam sandwich structure. A linear frequency modulation infrared thermal wave nondestructive testing system was built to study the correlation between the geometric characteristics (diameter and depth) of the defect and the surface temperature signal and its influence on the detection effect. The image sequence is processed by principal component analysis, discrete Fourier transform, thermal wave signal reconstruction, and other algorithms. Studies have shown that the larger the defect diameter, the shallower the depth, easy to detect defects, detection effect is good. The detection system can effectively detect and identify debonding and de-lamination defects. The thermal wave signal reconstruction method is superior to the principal component analysis method and the discrete Fourier transform method in the signal-to-noise ratio index, which improves the quality of the image and is conducive to the effective identification of the image surface defect information.
Novel solutions for the heat equations arising in the elliptic curves over the field of rational numbers
Authors: Yang Xiao-Jun , Cui Ping , Xu Feng
Published: January 2023

In this article we consider the solutions of the heat equations with use of the elliptic curves over the field of rational numbers. We propose the entire functions associated with the Hasse-Weil L-function. We show the conjectures that new functions have only real zeros in the entire function plane. The obtained results are proposed as new tool to describe the complex behaviors of the heat problems as well as number theory.
Defect detection of GFRP laminates by barker code modulation excitation infrared thermal imaging
Authors: Tang Qing-Ju , Ran Ling , Qu Ze-Shen , Bub Chi-Wu
Published: January 2023

During the preparation and service of GFRP laminates, due to the influence of
manufacturing process, it is easy to produce debonding defect. This paper
expounds the basic principle and test process of infrared nondestructive
testing, which using the barker code modulation of the thermal wave to
identify the GFRP laminate debonding defect. Through the establishment of
infrared thermal imaging testing system, this paper studies its detection
effect on defects with different diameter, depth and diameter-to-depth
ratio, processes the image sequence by using principal component analysis
(PCA) and discrete Fourier transform (DFT) algorithms, and finally
calculates and compares the processed signal-to-noise ratio (SNR). The
results show that Barker code modulated thermal wave infrared detection can
detect the debonding defects of GFRP laminates. Among them, the detection
effect of 13-bit Barker coded modulation excitation is better, and the image
processed by DFT has better recognition effect.
Ambiguity of Superiority and Authority
Authors: Murphy Jon
Published: January 2023

As part of a book symposium on Erwin Dekker's Jan Tinbergen (1903–1994) and the Rise of Economic Expertise (2021), Jon Murphy reflects on Tinbergen's and Keynes's differing views on the role of experts underlying the Tinbergen-Keynes debate.
PENGARUH PEMBERIAN JENIS DAN DOSIS PUPUK NITROGEN TERHADAP KANDUNGAN PROTEIN KASAR DAN SERAT KASAR RUMPUT GAMA UMAMI
Authors: Wardhani Anugrah Satria , Liman Liman , Farda Fitria Tsani , Muhtarudin Muhtarudin
Published: January 2023

Penelitian ini bertujuan untuk mengetahui adanya pengaruh jenis dan dosis pupuk nitrogen terhadap kandungan protein kasar dan serat kasar rumput gama umami. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan metode split plot design (rancangan petak terbagi) dengan dua taraf perlakuan yaitu perlakuan utama (main plot) dan perlakuan anak petak (sub plot). Perlakuan utama berupa jenis-jenis pupuk nitrogen : K1 (pupuk urea); K2 (pupuk Calcium Ammonium Nitrat). Perlakuan anak petak berupa dosis penggunaan pupuk kandang: R0 (0 N kg/ha); R1 (50 N kg/ha); R2 (100 N kg/ha); dan R3 (150 N kg/ha). Setiap unit perlakuan percobaan berupa lahan petak berukuran 1,4 x 1,6 m. Setiap unit percobaan diulang sebanyak 3 kali, sehingga terdapat 24 unit percobaan. Data yang diperoleh dianalisis ragam pada taraf nyata 5%. Hasil penelitian menunjukkan bahwa penggunaan jenis pupuk nitrogen yang berbeda berpengaruh nyata (P<0,05) terhadap protein kasar (K1: 9,03%; K2: 7,04%) dan dilanjutkan menggunakan uji Beda Nyata Terkecil (BNT) tetapi tidak berpengaruh nyata (P>0,05) terhadap kandungan serat kasar. Penggunaan dosis pupuk nitrogen yang berbeda tidak berpengaruh nyata (P>0,05) terhadap protein kasar dan serat kasar.
FAKTOR – FAKTOR YANG MEMENGARUHI SERVICE PER CONCEPTION (S/C) SAPI SIMPO DI KPT MAJU SEJAHTERA KECAMATAN TANJUNG SARI KABUPATEN LAMPUNG SELATAN
Authors: Fatmawati Dewi , Suharyati Sri , Adhianto Kusuma , Siswanto Siswanto
Published: January 2023

Service per conception (S/C) merupakan salah satu cara untuk mengetahui efesiensi reproduksi ternak. Penelitian ini dilaksanakan di KPT Maju Sejahtera Kecamatan Tanjung Sari Kabupaten Lampung Selatan pada Februari 2022 dengan 115 ekor sapi Simpo yang telah di IB, 5 peternak, dan 4 orang inseminator. Tujuan penelitian ini adalah untuk mengetahui: 1) nilai S/C sapi Simpo; 2) faktor – faktor dan besaran faktor yang memengaruhi S/C pada sapi Simpo di KPT. Maju Sejahtera Kecamatan Tanjung Sari Kabupaten Lampung Selatan. Metode yang digunakan dalam penelitian ini adalah metode survey dan data diperoleh dengan cara purposive sampling yaitu sapi Simpo betina yang berumur 2 sampai 4 tahun. Data yang digunakan adalah data primer dan sekunder data primer berupa hasil pengamatan ternak dan manajemen pemeliharaan, serta hasil wawancara pada peternak dan inseminator. Data sekunder berupa data akseptor yang diperoleh dari recording inseminator. Data hasil penelitian diolah menggunakan regresi berganda dengan program SPSS (Statistics Packet for Social Science). Hasil penelitian menunjukkan bahwa nilai S/C pada sapi Simpo di KPT Maju Sejahtera Kecamatan Tanjung Sari 2,1±1,15. Faktor-faktor yang memengaruhi nilai S/C pada sapi Simpo berasal dari variabel Inseminator dan peternak. Faktor-faktor yang memengaruhi nilai S/C pada sapi Simpo pada tingkat inseminator adalah pendidikan inseminator yang berasosiasi negatif dengan besar faktor 0,672 dan lama thawing yang berasosiasi negatif dengan besar faktor 0,025. Faktor – faktor yang memengaruhi S/C pada tingkat peternak dan ternak adalah pengetahuan beternak yang berasosiasi positif dengan besar faktor 1,045; jenis hijauan yang berasosiasi positif dengan besar faktor 0,671; dan luas kandang yang berasosiasi negatif dengan besar faktor 0,933.
PENGARUH PENGOLAHAN AMONIASI, FERMENTASI, DAN AMOFER KELOBOT JAGUNG TERHADAP KONSENTRASI VFA TOTAL, NH3, DAN PRODUKSI GAS TOTAL SECARA IN VITRO
Authors: Putri N Dessi Liana , Sutrisna Rudy , Fathul Farida , Liman Liman
Published: January 2023

Penelitian ini bertujuan untuk mengetahui pengaruh pengolahan amoniasi, fermentasi, dan amofer (amoniasi-fermentasi) kelobot jagung terhadap konsentrasi VFA total, NH3, dan produksi gas total secara in vitro. Penelitian ini dilaksanakan pada Januari – Maret 2022 di Laboratorium Nutrisi dan Makanan ternak, Jurusan Peternakan, Fakultas Pertanian, Universitas Lampung dan Laboratorium Nutrisi dan Ternak Perah, Fakultas Peternakan, Institut Pertanian Bogor. Penelitian ini menggunakan Rancangan Acak Lenglap (RAL) yang terdiri dari 4 perlakuan dan 4 ulangan sehingga terdapat 16 satuan percobaan. Perlakuan yang digunakan yaitu P1 (kontrol/tanpa perlakuan); P2 (amoniasi dengan 2% urea); P3 (fermentasi dengan 5% Aspergillus niger); P4 (Amofer (amoniasi dengan 2% urea dan fermentasi dengan 5% Aspergillus niger)). Data yang diperoleh dianalisis ragam pada taraf nyata 5% dan 1%. Apabila terdapat pengaruh nyata, akan diuji lanjut menggunakan uji Duncan’s Multiple Range Test (DMRT). Hasil analisis sidik ragam menunjukkan bahwa konsentrasi VFA total tidak berpengaruh nyata (P>0,05), tetapi berpengaruh sangat nyata (P<0,01) terhadap konsentrasi NH3 dan produksi gas total, dengan hasil penelitian terbaik pada perlakuan amoniasi, yaitu konsentrasi NH3 9,66 mM dan produksi gas total 132,95 mL/g.
HARI PERDAGANGAN: ABNORMAL RETURN DAN VOLATILITAS RETURN SAHAM
Authors: LBS Maulana Amri Lutfi H , Khairunnisa Khairunnisa
Published: January 2023

Investor memiliki tujuan untuk memaksimalkan pengembalian dana yang diinvestasikan tanpa mengabaikan risiko. Penelitian ini bertujuan untuk mengetahui pengaruh hari perdagangan terhadap abnormal return saham dan volatilitas return saham pada perusahaan yang konsisten terdaftar di Jakarta Islamic Index periode Januari–Desember 2021. Perusahaan yang konsisten terdaftar di Jakarta Islamic Index selama bulan Januari –Desember 2021 adalah populasi dalam penelitian ini. Metode purposive sampling menghasilkan 24 perusahaan sampel. Metode analisis dalam penelitian ini adalah Wilcoxon Signed Rank Test. Hasil penelitian menunjukkan bahwa tidak terdapat pengaruh yang signifikan dari anomali hari perdagangan terhadap abnormal return saham. Return saham abnormal positif terjadi pada hari Kamis dan negatif pada hari Selasa. Terdapat pengaruh yang signifikan dari anomali hari perdagangan terhadap volatilitas return saham perusahaan.
KUALITAS LAPORAN KEUANGAN UMKM BERBASIS SAK EMKM : SELF EFFICACY SEBAGAI VARIABEL MODERASI
Authors: Sari Putri Mila
Published: January 2023

The purpose of this study was to determine the effect of the perception of business actors, accounting knowladge, and experience of business owners on the quality of MSME financial reports based on SAK EMKM moderated by self-efficacy in Sumenep Regerency. This study uses a quantitative approach with primary data obtained from questionnaires distributed via google form. The population in this study were all MSME actors in Sumenep Regency. Convinience sampling is used as a sampling technique. The analytical technique used in this research is SmartPLS 3.0. The results show that the quality of financial reports is supported by the perceptions and MSME owner experience in Sumenep Regency. However, the accounting knowledge factor has not been able to support the achievement of the quality of financial reports. In addition, self-efficacy has not been able to strengthen the factor in improving the quality of financial reports.
: Intensi Berwirausaha: Analisis Bibliometrik
Authors: Zaskia Ajeng
Published: January 2023

This study aims to analyze the trend of entrepreneurial intention publications about important journals in this field, years with maximum publications, most frequently published journals, productive authors, productive affiliations, productive countries, the relationship between authors and keywords that appear most often. Research design used is Bibliometric analysis. Document sources come from Scopus as many as 873, during the 2010-2021 period. Then analyzed using Excel and Vos Viewer. The results of the study indicate that the International Entrepreneurship And Management Journal is the most relevant source and produces many publications related to entrepreneurial intention. The study shows that the highest publication will be in 2021 with 180 documents. Liñán, F is the most prolific writer with 16 publication files. Jakarta State University is the most excellent affiliate. Malaysia is the country with the highest contribution to entrepreneurial intention scientific publications, Wibowo A. is a writer who has relationships with other people and the keyword that appears most often is entrepreneurial intention. The findings in this study have several important implications, both for readers as information, entrepreneurial intention researchers or for further research in an effort to increase research on entrepreneurial intention in the future. Originality This study is the first to review and map the entrepreneurial intention study using bibliometric analysis, using data from year to year. All articles published in the journal have been reviewed in terms of methodology, country/country group of cases and topics/subtopics for future research.
PENGARUH VARIASI PRODUK DAN DISPLAY LAYOUT TERHADAP KEPUTUSAN PEMBELIAN MELALUI WORD OF MOUTH SEBAGAI VARIABEL MEDIASI DI TOKO SRC JUMASRI TALANG KAWO MERANGIN JAMBI
Authors: Regindratama Angga
Published: January 2023

Penelitian ini bertujuan untuk mendeskripsikan pengaruh variasi produk dan display layout terhadap keputusan pembelian melalui word of mouth sebagai variabel mediasi di Toko SRC Jumasri di Merangin, Jambi.
          Penelitian ini tergolong penelitian kuantitatif. Populasi adalah konsumen Toko SRC Jumasri. Sampel penelitian ini adalah 100 responden. Metode pengambilan sampel yang digunakan adalah metode non probability, dalam metode non probability ini menggunakan teknik purposive sampling yaitu teknik penentuan sampel dengan pertimbangan tertentu. Metode pengumpulan data menggunakan metode kuesioner, kuesioner disebarkan ke konsumen atau responden yang pernah datang dan berbelanja di Toko SRC Jumasri.
          Hasil analisis menunjukan bahwa: (1) variasi produk memiliki pengaruh negatif dan tidak signifikan terhadap variabel keputusan pembelian. (2) variabel Display Layout memiliki pengaruh positif dan tidak signifikan terhadap variabel keputusan pembelian. (3) word of mouth memiliki pengaruh negatif dan tidak signifikan terhadap variabel keputusan pembelian. (4) variabel variasi produk memiliki pengaruh positif dan signifikan terhadap variabel word of mouth. (5) display layout memiliki pengaruh positif dan signifikan terhadap variabel word of mouth. (6) Word of Mouth tidak berhasil memediasi pengaruh variasi produk terhadap keputusan pembelian. (7) Word of Mouth berhasil memediasi pengaruh display layout terhadap keputusan pembelian.
KARAKTER KEWIRAUSAHAAN MEMEDIASI PENGARUH PEMBELAJARAN KEWIRAUSAHAAN TERHADAP INTENSI BERWIRAUSAHA
Authors: Faradina Arofah Nukeu Siti
Published: January 2023

Penelitian ini dilatarbelakangi oleh masih rendahnya intensi berwirausaha siswa di SMK Negeri Kabupaten Sumedang. Tujuan penelitian ini adalah untuk mengetahui dan menganalisis pengaruh pembelajaran kewirausahaan terhadap intensi kewirausahaan dan variabel karakter kewirausahaan sebagai variabel mediasi. Metode yang digunakan dalam penelitian ini merupakan penelitian survey eksplanatori dengan teknik pengumpulan data melalui angket dan observasi. Populasi penelitian ini adalah siswa kelas XI jurusan bisnis dan pemasaran sebanyak 325 siswa sedangkan sampel sebanyak 180 siswa. Data yang telah terkumpul kemudian dianalisis menggunakan teknik analisis data regresi linier berganda dengan analisis Sobel Test. Hasil penelitian menunjukkan bahwa secara umum i) intensi kewirausahaan, berada pada kategori rendah, karakter kewirausahaan, berada pada kategori sedang sedangkan pembelajaran kewirausahaan berada pada kategori tinggi. ii) Pembelajaran kewirausahaan berpengaruh terhadap intensi kewirausahaan. iii) Karakter kewirausahaan memediasi antara pengaruh pembelajaran kewirausahaan terhadap intensi berwirausaha. Dapat disimpulkan bahwa siswa kelas XI jurusan Bisnis dan Pemasaran di Kabupaten Sumedang mempunyai intensi berwirausaha yang belum baik.
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI RETURN SAHAM DENGAN NILAI PERUSAHAAN SEBAGAI VARIABEL MODERASI PADA PERUSAHAAN BATUBARA YANG TERDAFTAR DI BURSA EFEK INDONESIA
Authors: Pramitha Agnes Oktavia , Yuniningsih Yuniningsih
Published: January 2023

This research aims to analyze the effect of economic value added, inflation, net profit margin, and dividend yield on stock returns with company value as a moderating variable either partially or simultaneously. The research scope is coal sub-sector companies that is listed on the Indonesia stock exchange (BEI) for the period 2015-2021, using purposive sampling technique, 6 companies were obtained as research samples. The analysis technique that is used are multiple linear regression analysis and moderate regression analysis. The results are partially only the Net profit margin variable that has significant effect on stock returns, while the Economic value added, inflation, and dividend yield variables have no effect on stock returns. In addition, firm value as a moderating variable proved unable to strengthen or weaken the relationship between Economic value added, Inflation, Net profit margin, and Dividend yield on stock returns. Simultaneously, all variables have no effect on Stock Return.
THE EFFECT OF CURRENT RATIO, DEBT TO EQUITY RATIO, TOTAL ASSET TURNOVER, AND FIRM SIZE ON PROFITABILITY In Textile and Garment Sub-Sector Companies Listed on the Indonesia Stock Exchange for the 2015-2020 Period
Authors: Oktavira Rowina
Published: January 2023

ABSTRACT

This study aims to determine the effect of Current Ratio, Debt To Equity, Total Asset Turnover and Firm Size on Profitability of Textile and Garment Manufacturing companies listed on the Indonesia Stock Exchange for the period 2015 – 2020. The sampling technique used purposive sampling of Textile and Garment Manufacturing companies listed on the Indonesian Stock Exchange. IDX for the period 2015 – 2020. The type of data used is secondary data. The analytical method used is the classical assumption test, correlation coefficient test, multiple linear regression test, hypothesis testing, and coefficient of determination test using the SPSS version 26.0 program and Microsoft Excel 2013 using the stepwise method. The results of the study show that Current Ratio and Debt To Equity have no significant effect on Profitability. While Total Asset Turnover and Firm Size have a significant effect on Profitability. The coefficient of determination of 28.1% shows that there are still 71.9% more caused by other variables not examined in this study.

Keywords : Cr; Der; Firm Size; Profitabiliy; Tato
Project Model in The Engineering Universities: Perspectives and Problems
Authors: Menshikova Irina
Published: January 2023

The purpose of this article is to analyze ways to integrate the project approach into educational programs, taking into account the experience of Russian and foreign universities. An analysis of the research problem field has shown that over the past 10 years higher education institutions have significantly changed the traditional educational programs moving to open curricula, as well as project and problem-based approaches. In general, the modification of educational programs is aimed at strengthening their practice orientation to real industrial cases.
The novelty of the work can be expressed by systematic analysis of various approaches to integrate project method into the educational models of the following universities: Singapore University of Technology and Design (SUTD); Olin College of Engineering; Aalborg University; TU Delft Iron Range Engineering; Singapore Polytechnic University.
Over the past few years, the concept of the traditional implementation of project activities has been modified to the direction of the company-formulated projects, as well as interdisciplinary projects, where the education is student-centered.
Methodology and research methods. When writing this article, the scientific basic method of theoretical and empirical research was used: methods of monographic research, questionnaire survey, methods of working with specialized software products, Internet sources, methods of analysis, synthesis, comparison, induction, and deduction.
MODELING OF FAILED RISK FACTORS AFFECTING ON NON PERFORMING LOAN TO MSME’S IN PANDEMIC COVID-19
Authors: Luhgiatno Luhgiatno , Sijabat Rauly , Santoso Aprih , Laily Nur
Published: January 2023

The contribution of Micro, Small, and Medium Enterprises (MSME) performance has a strategic role as a buffer for the national economy. The economic crisis that has hit Indonesia several times, including during the COVID-19 pandemic, has hit the MSME sector, so the sector is no longer able to repay its loans. Even though at that time the MSME sector was working to fix the classic problems that hampered it is performance. Departing from this phenomenon, this study examines the results of previous studies to map five exogenous variables, namely debt character factors, financial factors, management factors, operational factors as well as market and marketing factors as explanatory variables that allegedly cause MSMEs to experience the risk of failing to pay credit which has an impact on the poor NPL. The results of the SEM analysis of data from 125 MSMEs in Semarang City affected by COVID-19 showed that the high risk of default experienced by MSMEs was caused by debt character factors, financial factors, management factors, operational factors, and poor market and marketing factors which then impact on increasing the NPL ratio.
Information and Communication Technology Based Education Marketing Management
Authors: Afifah Isna Zahrotun , Wiyani Novan Ardy
Published: January 2023

This study aimed to describe information and communication (ICT)-based education marketing management in MTs Ma’arif NU 1 Jatilawang Banyumas. This study employed qualitative approach by using interview, observation, and documentation for the data collection. The collected data were analyzed by Miles and Huberman model, consisted of data reduction, data presentation and data verification. The results of the study shows that education marketing management in MTs Ma’arif NU 1 Jatilawang Banyumas utilized information and communication technology (ICT), especially in its education marketing. In this study, the education marketing was done by George R. Terry’s theory in management function analysis which were planning, organization, implementation, and evaluation. ICT-based education marketing management in MTs Ma’arif NU 1 Jatilawang Banyumas was done through ICT-based planning of education marketing management, ICT-based organization of education marketing management, ICT-based implementation of education marketing management, and ICT-based evaluation of education marketing management. Keywords: Education, ICT, Management, Marketing.
The Implementation of Total Quality Management in Forming Student’s Religious Totality
Authors: Qodri Ahmad , Kusuma Sri , Warlizasusi Jumira , Pratama Surya Adi
Published: January 2023

Aqidah, sharia and morals are the fundamental aspects in Islamic teachings that need to be totally instilled in oneself. However, the cultivation of those main values, in fact, has not been maximized. This problem also becomes a concern of SMKIT Khoiru Ummah Rejang Lebong Bengkulu in which the cultivation of aqidah, sharia and morals faces the challenges and obstacles. At the same time, such problems indicate that the totality of students in applying Islamic values has not been thoroughly embedded. This facts then require the school to implement Total Quality Management in its religious education activities. Therefore, this article aims to describe the implementation of Total Quality Management as an effort to form the quality and religious totality of students. This type of research is qualitative-descriptive.  Data were collected by conducting interviews and observations. The data were then analyzed by reducing, displaying and drawing conclusions. The validity of the data was tested by using triangulation technique. The result of this study shows that the efforts to form religious totality are carried out through routine religious activities at school, giving reprimands, directions, punishments, exemplary, environmental conditioning, school culture and the application of noble values through learning and training. Through these activities, the school applies the principles of Total Quality Management which include evaluation and improvement, optimizing the role of the school headmaster, cooperation, prioritizing customer satisfaction, conducting planned training, and improving quality of learning.Keywords: Total Quality Management, Religious Totality
The Implementation of Educational Supervision in Improving Teacher Professional Competence
Authors: Armizawati Armizawati , Asmendri Asmendri
Published: January 2023

The implementation of educational supervision to enhance the teacher professionalism at MAS Thawalib Tanjung Limau, Tanah Datar Regency becomes  the main focus of this study. This study is a part of descriptive qualitative research. The head of the MAS, however, is the main source of research data. Observations and interviews are used as data collection techniques. The supervision provided by the head of MAS Thawalib Tanjung Limau plays a significant role as the effort to increase the quality of teachers. For increasing resource capacity and revamping materials to meet national education goals, strategies such as instructional supervision are helpful. The preparation stage, class observation, and assessment or feedback discussion are the three stages that make up this clinical supervision. Limited infrastructure and resources, lack of teacher discipline, and lack of teacher knowledge about efficient classroom management techniques are challenges experienced in the clinical supervision and teaching. This study shows that the principal's educational supervision places a vital position to support appropriate infrastructure and facilities of schools, maximize the teacher disciplinary action, and offer proper direction, and advice on efficient classroom management procedures. Keywords: Competence, Education, Supervision, Teacher Professionalism
Narasi Perempuan sebagai Tersangka dalam Berita: Analisis Wacana Kritis Kasus Zuraida pada Detiknews.com
Authors: Nurhaqiqi Hanna , Mustikasari Ratih Pandu , Winarti Oktifani
Published: January 2023

Posisi perempuan dalam sebuah teks berita seharusnya memiliki posisi dan perspektif yang sama kedudukannya dengan laki-laki. Baik dalam pemberitaan sebagai korban, tersangka dan saksi. Khususnya sebagai tersangka, dimana stigma dan stereotip negatif yang melekat pada tersangka kejahatan menjadi hal yang wajar dan lazim. Berbeda halnya dengan posisi pemberitaan perempuan sebagai tersangka yang melekat dengan status ganda, yakni tersangka sekaligus perempuan. Riset ini melakukan analisis wacana kritis pada Detiknews terhadap pemberitaan tersangka pembunuhan Hanum Zuraida pada periode Maret-April 2020 melalui perspektif Wacana Kritis Sara Mills. Analisis akan dibagai menjadi frasa, kata, kalimat dan wacana. Melihat konteks narasi yang dimunculkan berita mengenai Hanum Zuraida. Status ganda yang melekat pada tersangka serta bagaimana teks-teks yang hadir memberikan penguatan akan stereotip dan stigma perempuan sebagai tersangka.
Unidad aritmética de punto flotante: diseño e implementación con portabilidad
Authors: Patarroyo-Gutierrez Luis David , Gil Hernández Carlos Andrés , Gutiérrez Meléndez Iván Ricardo
Published: January 2023

El uso de las unidades de punto flotante (FPU) en el procesamiento digital se ha incrementado dada la alta precisión y rango de números que se pueden representar. En el procesamiento de imágenes, filtros digitales con respuesta infinita al impulso (IIR), respuesta finita al impulso (FIR) y controladores digitales, se requieren este tipo de unidades para obtener resultados más precisos y evitar respuestas inestables, sin embargo, para implementar estas, algunos procesadores tienen unidades incorporadas lo que implica una dependencia tecnológica de los fabricantes para desarrollar prototipos. Para evitar dicha dependencia, en este artículo se presenta el diseño de los módulos para las operaciones más usadas en el procesamiento digital de señales: multiplicación y la suma/resta. Se presentan los pasos y consideraciones a tener en cuenta como las excepciones, redondeo y normalización de operandos, para lograr implementar estas operaciones en cualquier matriz de puertas lógicas programables en campo (FPGA). Se comprueban resultados utilizando el banco de pruebas MODELSIM® y se determinó la tasa de error, utilizando MATLAB®.