bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimizing Air Compressor Productivity in Supporting Operational Activities on The Mt Ship. Gamalam
Authors: Naufal Annafi Muhammad , Ala Asman , Delta Susanto Jarot
Published: November 2023

Air compressors are auxiliary machines on board that can produce high pressure air. This research was conducted because the productivity of the air compressor was less than optimal, causing air production and the performance of the air compressor to be less than optimal and disrupting operational activities on the ship. The impact that occurs when air production is reduced in the air compressor, the ship cannot operate according to the contract specified by the company, because the initial start of the main engine or main engine on board requires compressed air. Many factors can cause reduced production of air produced by air compressors, including the lack of performance of the suction valve and exhaust valve on the high pressure section which causes less maximum or longer time for filling air into the air bottle, low flow of the lubrication system on the piston which causes no compression to produce air. This research was carried out with the aim of identifying and analyzing the causes of the lack of performance of the suction and exhaust valves on high pressure sections and low flow of the piston lubrication system which results in less optimal performance of the air compressor when filling into air bottles. The method used in this study uses a qualitative descriptive method using primary and secondary data collection approaches and techniques. The lack of performance of the inlet and exhaust valves can be corrected by cleaning the carbon deposits on the valves and leveling the valve surfaces. The low flow of the lubrication system on the piston can be done by checking the lubricating oil pump, cleaning the lubricating oil filter, changing the lubricating oil periodically according to the instruction manual book, and adding lubricating oil according to the specifications of the air compressor.
Analysis of The Application of Ultraviolet Water Sterilizer in Maintaining The Quality of Drinking Water on The MV. EPIC PAN
Authors: Muhamad Fitra Laode , Almuzani Nafi , Simanjuntak Marihot
Published: November 2023

Ultraviolet water sterilizer is a long cylindrical device used for the sterilization of water into drinkable water. Ultraviolet water sterilizer has two main parts: an adapter and UV tubes. The adapter serves to drain the ratio of electricity according to the voltage and current required by ultraviolet water sterilizer. UV tubes contain ultraviolet lamps where light is the main equipment for making the water drinkable and the water will flow along with the ultraviolet rays, so that the water flowing in the tube is passed through the sterilization process with ultraviolet rays so that the water is unfit for consumption. The problems that the authors take in this study are the factors that affect the declining quality of sterilization, the impact of what happens when the quality of sterilization decreases, and what efforts are made to keep the quality of sterilization is not decreased. The data was collected through observations, interviews, and literature directly related to the subject related to the factors, the impact, as well as the efforts of the decline in the sterilization process to the sterilizer in order to improve the quality of drinking water. The cause of the decline to the sterilization process in order to improve the quality of drinking water in MV. PAN EPIC that dirty filters, dirty water tubes, and the dirty ultraviolet lamp or resulting in less fresh water, complaints against the company, as well as the ship's operational costs are reduced. Therefore some efforts are made to improve the quality of the results of sterilization including cleaning filters, cleaning water tubes, and also cleaning the germicidal lamp,
Performance Analysis of Sea Water Cooling Pumps on The Smoothness of The Main Engine Cooling System on The Mt. Fail
Authors: Arda Billy Mohammad , Kurniawan Didik Sulistyo , Sursina Sursina , Mudakir Mudakir
Published: November 2023

The main engine sea water cooling pump is a type of centrifugal pump as one of the pumps that is often found in the ship machinery industry working on the principle of impeller rotation as a fluid transfer element driven by a propulsion engine. The liquid inside will rotate due to the impetus of the blades and cause a centrifugal force which causes the liquid to flow from the middle of the impeller and out through between the blades and leave the impeller at high speed. The sea water cooling pump has a very important role in supporting the cooling system process on the main engine. If the coolant pump does not work properly, it will result in a less than optimal cooling system. Like the problems the author experienced when carrying out sea practice on the MT ship. This causes problems with the lack of maximum performance from the pump impeller and pump vibrations that are too high. which resulted in affecting the performance of the main engine and disrupting the operation of the ship. The purpose of this research is to find out the cause of the less than optimal performance of the impeller on the pump and find a solution. and to find out the cause of too high vibration in the pump and find a solution. While this research method is a qualitative descriptive research method. The results of this study are expected to be useful in science as a contribution to ideas related to the analysis of the performance of seawater cooling pumps to support ship operations.
The Influence of Principal Supervision and Pedagogic Competence On Teacher Innovativeness and Teacher Work Quality
Authors: Mulyadi  , Ali Hapzi , Imron Rosadi Kemas
Published: November 2023

Teacher Work Quality is an individual's feelings and perceptions about the balance of personal life and professional life in relation to work, co-workers and the organization where he works. The Effect of Principal Supervision, and Pedagogic Competence on Teacher Innovativeness and the Quality of Teacher Work is a scientific article of literature study within the scope of the field of science. The purpose of this article is to build a hypothesis of the influence between variables that will be used in further research. Research objects in online libraries, Google Scholar, Mendeley and other academic online media. The research method with the research library comes from e-books and open access e-journals. Qualitative descriptive analysis. The results of this article: Principal Supervision (X1) and Pedagogic Competence (X2) on Teacher innovation (Y1) and Teacher work quality (Y2).
The Effect of Product Quality, Price, and Halal Certification on The Sales Volume (Literature Review)
Authors: Fardani Nadya
Published: November 2023

The current globalization phenomenon provides significant opportunities for the development of the national economy. One of the impacts of the globalization phenomenon is the expansion of transactions in the global economy which has an impact on increasing market competition. In responding to this phenomenon, preparation is needed from business owner to increase sales of their products. Therefore, research is needed to determine the factor that affect sales volume. This literature review article is written to build a research hypothesis related to product sales volume that are influenced by product quality, price, and halal certification. The method used in writing the article is a library research method sourced from online media, such as Google Scholar, Mendeley and other academic online media. The results of this literature review article are product quality, price, and halal certification affect product sales volume.
Bal??le As A Ritual To Inherit Banggai Cultural Values
Authors: Samatan Nuriyati , Wahyudin  , Ariandi Putra  , Robingah
Published: November 2023

This research aims to examine Baleele culture as a value inheritance ritual in Banggai culture. This research is qualitative, using an ethnographic approach with the following steps: [1] Determining the object of ethnographic research; [2] Identifying and determining the location of the cultural group; [3] Selecting the cultural theme of the cultural group; [4] Determining the type of ethnography; [5] Collecting information; [6] Writing research results. The result found that Baleele is a form of ritual communication carried out at a certain time, ahead of the "Big Ritual" of Banggai custom, namely the Mabangun Tunggul Ritual, held every 6 years. Baleele is one of the rituals that takes place three nights before the Mabangun Tunggul Ritual. The Banggai people strongly believe in the advice delivered, and consider the process as something sacred, valuable, for themselves, their families and the Banggai community as a whole.
Determinants of Organizational Culture and Its Impact on Employee Performance at PT. AHI
Authors: Da'wat Mujibu , Nuraeni Nuraeni , Yusuf M
Published: November 2023

The study of organizational culture, which is believed to have a significant impact on companies, is an intriguing field of research. It aims to unravel the realities and intricacies of organizational culture, leadership, career advancement, and employee performance at PT AHI. To conduct this study, a survey method with a quantitative approach was employed. The researcher observed and formulated a series of statements with multiple-choice options to gather numerical responses through questionnaires. A total of 98 employees participated as respondents, and the collected data was analyzed using the Structural Equation Modeling (SEM) technique with smartPLS software. The findings indicate that leadership (X1) and career development (X2) have a positive and significant influence on organizational culture (Y). The R-square value of 0.519 suggests that organizational culture (Y) is influenced by leadership (X1) and career development (X2). Furthermore, employee performance (Z) is concurrently influenced by organizational culture (Y), leadership (X1), and career development (X2), with an R-square value of 0.681.
Level Of Implementation Of Integrated Farming (A Case in P4S An-Nabawie Agrolestari Majasuka Village Palasah District Majalengka Regency)
Authors: Sulaksana Jaka , Susanto Hermawan , Umyati Sri
Published: November 2023

The purpose of this research is to find out the description of the application of integrated farming systems in efforts to develop agribusiness and also to determine the level of application of integrated agricultural systems in efforts to develop agribusiness. This research was conducted in Majasuka Village, Palasah District, Majalengka Regency. The analytical method used, namely descriptive analysis, is intended to find out how the description of the application of integrated agricultural systems and the level of implementation of integrated agricultural systems in the development of agribusiness efforts. The results showed that the level of application of integrated agricultural systems in the development of agribusiness is quite high with an average total conformity rate of 80%. the respondent farmers have been quite good about integrated farming systems in an effort to develop agribusiness.
The Influence of Consumer Impulse Buying and Electronic Word of Mouth on Purchasing Decisions
Authors: Tasya Gita Meisa , Satriawan Budhi , Satyawisudarini Inne
Published: November 2023

This study aims to analyze or find out about conditions and how much influence Consumer Impulse Buying and Electronic Word Of Mouth have on purchasing decisions through surveys of consumers of Skincare Avoskin Yourbae Serum products on TikTok. Impulse buying is the tendency of consumers to make purchases spontaneously, unreflected, in a hurry driven by the psychological emotional aspects of a product and tempted by persuasion from marketers. Electronic Word Of Mouth is an informal, non- commercial online communication about opinions on a service or product, which occurs in person, by telephone, e-mail, or other communication method. Purchasing decisions are decisions where consumers actually decide to buy and enjoy goods or services among various alternative choices. Based on the results of this study, it shows that Consumer Impulse Buying is considered quite good by consumers and has a positive and significant effect on Purchase Decisions. Electronic Word of Mouth is considered good by consumers and has a positive and significant effect on Purchasing Decisions. Consumer Impulse Buying and Electronic Word of Mouth have a positive and significant effect on Consumer Purchase Decisions on Avoskin Yourbae Serum Skincare Products on TikTok and are considered to have a partial and simultaneous effect, because with the ability of companies to utilize and create Consumer Impulse Buying and Electronic Word of Mouth, it will have an impact consumer purchasing decisions for Avoskin products, especially Skincare Avoskin Yourbae Serum.
Factors that influence the external potential of Islamic education management; Government Policy, Technological Development and Socio-Cultural Society
Authors: Rois Amin Mursyid Musthofa An Najmi , Ali Hapzi , Imron Rosyadi Kemas
Published: November 2023

Factors that influence the external potential of Islamic education management, Government Policy and Technological Development on Socio-Cultural Society is a scientific article of literature study within the scope of the field of science. The purpose of this article is to build a hypothesis of the influence between variables that will be used in further research. Research objects in online libraries, Google Scholar, Mendeley and other academic online media. The research method with the research library comes from e-books and open access e-journals. Qualitative descriptive analysis. The results of this article: 1) Government policies affect the external potential of MPI; 2) Technological developments affect the external potential of MPI; and 3) Socio-cultural influences on the external potential of MPI;
New Paradigm of Employee Productivity
Authors: Cahyati Peni , Kartilah Tetet , Mulyatini Nurdiana
Published: November 2023

The purpose of this study was to assess the extent to which the implementation of current education and training programs affects the job productivity of kindhearted employees. According to the findings from data analysis, there are certain factors pertaining to the execution of education and training programs that should be taken into account and improved upon. These factors include: In order to enhance the efficiency of employees, there are several key elements that must be considered when implementing instructional and training programs. These include the preparation of materials, non-formal instruction, plan preparation, fostering camaraderie among educators, offering diverse training options, implementing effective strategies, and creating comprehensive training manuals. Additionally, it is crucial to maintain formal instruction, ensure teachers possess the necessary skills and capacities, provide adequate training facilities, develop comprehensive training curricula, and conduct regular assessments. The successful implementation of these instructional and training programs directly impacts the productivity of employees. Despite the theoretical nature of training programs, their practical application remains significant in the work of employees. Therefore, an appropriate and well-designed instructional and training program will undoubtedly contribute to increased employee productivity.
Exploring Climate with Obliquity in a Variable-eccentricity Earth-like World
Authors: Way M. J. , Georgakarakos Nikolaos , Clune Thomas L.
Published: November 2023

Exploring planetary systems similar to our solar system can provide a means to explore a large range of possibly temperate climates on Earth-like worlds. Rather than run hundreds of simulations with different eccentricities at fixed obliquities, our variable-eccentricity approach provides a means to cover an incredibly large parameter space. Herein Jupiter’s orbital radius is moved substantially inward in two different scenarios, causing a forcing on Earth’s eccentricity. In one case, the eccentricity of Earth varies from 0 to 0.27 over ∼7000 yr for three different fixed obliquities (0°, 23°, and 45°). In another case, the eccentricity varies from 0 to 0.53 over ∼9400 yr in a single case with zero obliquity. In all cases, we find that the climate remains stable, but regional habitability changes through time in unique ways. At the same time, the moist greenhouse state is approached but only when at the highest eccentricities.
Tracing the Total Stellar Mass and Star Formation of High-redshift Protoclusters
Authors: Popescu Roxana , Pope Alexandra , Lee Kyoung-Soo , Alberts Stacey , Chiang Yi-Kuan , Lee Sowon , Brodwin Mark , McKinney Jed , Ramakrishnan Vandana
Published: November 2023

As the progenitors of present-day galaxy clusters, protoclusters are excellent laboratories to study galaxy evolution. Since existing observations of protoclusters are limited to the detected constituent galaxies at UV and/or infrared wavelengths, the details of how typical galaxies grow in these young, pre-virialized structures remain uncertain. We measure the total stellar mass and star formation within protoclusters, including the contribution from faint undetected members by performing a stacking analysis of 211 z = 2–4 protoclusters selected as Planck cold sources. We stack Wide-field Infrared Survey Explorer and Herschel/SPIRE images to measure the angular size and the spectral energy distribution of the integrated light from the protoclusters. The fluxes of protoclusters selected as Planck cold sources can be contaminated by line-of-sight interlopers. Using the WebSky simulation, we estimate that a single protocluster contributes 33% ± 15% of the flux of a Planck cold source on average. After this correction, we obtain a total star formation rate of 7.3 ± 3.2 × 103
M
⊙yr−1 and a total stellar mass of 4.9 ± 2.2 × 1012
M
⊙. Our results indicate that protoclusters have, on average, 2× more star formation and 4× more stellar mass than the total contribution from individually detected galaxies in spectroscopically confirmed protoclusters. This suggests that much of the total flux within z = 2–4 protoclusters comes from galaxies with luminosities lower than the detection limit of SPIRE (L
IR < 3 × 1012
L
⊙). Lastly, we find that protoclusters subtend a half-light radius of 2.′8 (4.2–5.8 cMpc), which is consistent with simulations.
Generation of Subion Scale Magnetic Holes from Electron Shear Flow Instabilities in Plasma Turbulence
Authors: Arrò Giuseppe , Pucci Francesco , Califano Francesco , Innocenti Maria Elena , Lapenta Giovanni
Published: November 2023

Magnetic holes (MHs) are coherent structures associated with strong magnetic field depressions in magnetized plasmas. They are observed in many astrophysical environments at a wide range of scales, but their origin is still under debate. In this work, we investigate the formation of subion scale MHs using a fully kinetic 2D simulation of plasma turbulence initialized with parameters typical of the Earth’s magnetosheath. Our analysis shows that the turbulence is capable of generating subion scale MHs from large scale fluctuations via the following mechanism: first, the nonlinear large scale dynamics spontaneously leads to the development of thin and elongated electron velocity shears; these structures then become unstable to the electron Kelvin–Helmholtz instability and break up into small scale electron vortices; the electric current carried by these vortices locally reduces the magnetic field, inducing the formation of subion scale MHs. The MHs thus produced exhibit features consistent with satellite observations and with previous numerical studies. We finally discuss the kinetic properties of the observed subion scale MHs, showing that they are characterized by complex non-Maxwellian electron velocity distributions exhibiting anisotropic and agyrotropic features.
Understanding the Duration of Solar and Stellar Flares at Various Wavelengths
Authors: Reep Jeffrey W. , Airapetian Vladimir S.
Published: November 2023

Recent irradiance measurements from numerous heliophysics and astrophysics missions including Solar Dynamics Observatory (SDO), GOES, Kepler, TESS, Chandra, the X-ray Multi-Mirror Mission, and NICER have provided critical input into understanding the physics of the most powerful transient events on the Sun and magnetically active stars:solar and stellar flares. The light curves of flare events from the Sun and stars show remarkably similar shapes, typically with a sharp rise and protracted decay phase. The duration of solar and stellar flares has been found to be correlated with the intensity of the event in some wavelengths, such as white light, but not in other wavelengths, such as soft X-rays, but it is not evident why this is the case. In this study, we use a radiative hydrodynamics code to examine factors affecting the duration of flare emission at various wavelengths. The duration of a light curve depends on the temperature of the plasma, the height in the atmosphere at which the emission forms, and the relative importance of cooling due to radiation, thermal conduction, and enthalpy flux. We find that there is a clear distinction between emission that forms low in the atmosphere and responds directly to heating, and emission that forms in the corona, indirectly responding to heating-induced chromospheric evaporation, a facet of the Neupert effect. We discuss the implications of our results for a wide range of flare energies.
Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey
Authors: He Tongyu , Li Jiangdan , Chen Xuefei , Yang Rong-jia , Xiao Lin , Han Zhanwen
Published: November 2023

Hierarchical triple-star systems consists of three components organized into an inner binary (M
1, M
2) and a more distant outer tertiary (M
3) star. The LAMOST Medium-Resolution Spectroscopic Survey has offered a great sample for the study of triple-system populations. We used the peak amplitude ratio method to obtain the mass ratio (q
in, q
out) of a triple system from its normalized spectrum. By calculating the cross-correlation function, we determined the correlation between the mass ratio q
out (M
3/(M
1 + M
2)) and the amplitude ratio (A
3/(A
1 + A
2)). We derived a q
in of 0.5–1.0 and a q
out between 0.2 and 0.8. By fitting a power-law function of the corrected q
in distribution, γ
in is estimated to be −0.654 ± 2.915, 4.304 ± 1.125, and 11.371 ± 1.309 for A-, F-, and G-type stars. The derived γ
in values increase as the mass decreases, indicating that less massive stars are more likely to have companion stars with similar masses. By fitting a power-law function of the corrected q
out distribution, γ
out is estimated to be −2.016 ± 0.172, −1.962 ± 0.853, and −1.238 ± 0.141 for G-, F-, and A-type stars, respectively. The γ
out values show a trend of growth toward lower primary star masses.
Numerical Simulation on the Leading Edge of Coronal Mass Ejection in the Near-Sun Region
Authors: Mei Zhixing , Ye Jing , Li Yan , Xu Shanshan , Chen Yuhao , Hu Jialiang
Published: November 2023

The coronal mass ejections (CMEs) observed by white-light coronagraphs, such as the Large Angle and Spectrometric Coronagraph (LASCO) C2/C3, commonly exhibit the three-part structure, with the bright leading edge as the outermost part. In this work, we extend previous work on the leading edge by performing a large-scale 3D magnetohydrodynamic numerical simulation on the evolution of an eruptive magnetic flux rope (MFR) in a near-Sun region based on a radially stretched calculation grid in spherical coordination and the incorporation of solar wind. In the early stage, the new simulation almost repeats the previous results, i.e., the expanding eruptive MFR and associated CME bubble interact with the ambient magnetic field, which leads to the appearance of the helical current ribbon/boundary (HCB) wrapping around the MFR. The HCB can be interpreted as a possible mechanism of the CME leading edge. Later, the CME bubble propagates self-consistently to a larger region beyond a few solar radii from the solar center, similar to the early stage of evolution. The continuous growth and propagation of the CME bubbles leading to the HCB can be traced across the entire near-Sun region. Furthermore, we can observe the HCB in the white-light synthetic images as a bright front feature in the large field of view of LASCO C2 and C3.
A Dragon Out of Breath? Monitoring High-velocity Outflows from the High-mass Gamma-Ray Binary LS 2883/PSR B1259–63 During the 2017–2021 Binary Cycle
Authors: Hare Jeremy , Pavlov George G. , Garmire Gordon P. , Kargaltsev Oleg
Published: November 2023

Observations of the high-mass gamma-ray binary LS 2883/PSR B1259–63 with the Chandra X-ray Observatory during the 2011–2014 and 2014–2017 binary cycles have shown X-ray-emitting clumps, presumably ejected from the binary during periastron passages. These clumps traveled at projected velocities of ∼0.1c and have shown evidence of being accelerated. The clumps also evolved in shape, size, and flux. We monitored this binary with Chandra during the 2017–2021 binary cycle to search for additional X-ray-emitting ejections. While we find evidence of extended emission in two of the six observations, it is unlike the clumps observed in the previous three binary cycles. More specifically, the extended emission is not well localized, and no bright clump is observed moving away from the binary. It is still unclear what caused the lack of X-ray-emitting clump in this orbital cycle, but it may be due to changes in the decretion disk of the Be star.
The Maximum Energy of Shock-accelerated Cosmic Rays
Authors: Diesing Rebecca
Published: November 2023

Identifying the accelerators of Galactic cosmic ray (CR) protons with energies up to a few PeV (1015 eV) remains a theoretical and observational challenge. Supernova remnants (SNRs) represent strong candidates because they provide sufficient energetics to reproduce the CR flux observed at Earth. However, it remains unclear whether they can accelerate particles to PeV energies, particularly after the very early stages of their evolution. This uncertainty has prompted searches for other source classes and necessitates comprehensive theoretical modeling of the maximum proton energy,

E

max

, accelerated by an arbitrary shock. While analytic estimates of

E

max

have been put forward in the literature, they do not fully account for the complex interplay between particle acceleration, magnetic field amplification, and shock evolution. This paper uses a multizone, semianalytic model of particle acceleration based on kinetic simulations to place constraints on

E

max

for a wide range of astrophysical shocks. In particular, we develop relationships between

E

max

, shock velocity, size, and ambient medium. We find that SNRs can only accelerate PeV particles under a select set of circumstances, namely, if the shock velocity exceeds ∼104 km s−1 and escaping particles drive magnetic field amplification. However, older and slower SNRs may still produce observational signatures of PeV particles due to populations accelerated when the shock was younger. Our results serve as a reference for modelers seeking to quickly produce a self-consistent estimate of the maximum energy accelerated by an arbitrary astrophysical shock.
1

1

Presented as a thesis to the Department of Astronomy and Astrophysics, The University of Chicago, in partial fulfillment of the requirements for a Ph.D. degree.
Rankine–Hugoniot Relations and Magnetic Field Enhancement in Turbulent Shocks
Authors: Gedalin Michael
Published: November 2023

In fast collisionless shocks, the density and magnetic field increase and the plasma is heated. The compression and heating are ultimately determined by the Rankine–Hugoniot relations connecting the upstream and downstream parameters. The standard Rankine–Hugoniot relations take into account only mean upstream and downstream parameters. Observations at the Earth's bow shock show that the downstream magnetic field does not always relax to a uniform state, but large amplitude magnetic oscillations persist. Here, these Rankine–Hugoniot relations are extended to such turbulent shocks where the mean downstream magnetic field is accompanied by magnetic fluctuations. It is shown that the turbulent magnetic field pressure may substantially exceed the pressure of the mean field, while the density compression and heating may be only weakly affected. Thus, strong amplification of the rms magnetic field can be achieved at the expense of a modest reduction of plasma heating.
Evolutionary Relationship between Sunspot Groups and Soft X-Ray Flares over Solar Cycles 21–25
Authors: Lin 林 Jiaqi 家琪 , Wang 王 Feng 锋 , Deng 邓 Linhua 林华 , Deng 邓 Hui 辉 , Mei 梅 Ying 盈 , Zhang 张 Xiaojuan 小娟
Published: November 2023

Studying the interaction between solar flares and sunspot groups (SGs) is crucial for understanding and predicting solar activity. We examined the distribution, correlation, and flaring rates in the northern and southern hemispheres to reveal the relationship between different classes of soft X-ray (SXR) flares and different magnetic classifications of SGs. We discovered a significant north–south asymmetry in SXR flares and SG distribution over Solar Cycles (SC) 21–25. In the rising phase of SC24, the northern hemisphere’s activity is significantly excessive. In the declining phase of SC24, the southern hemisphere’s activity becomes significantly excessive. The total numbers of various SXR flares and SGs vary between the northern and southern hemispheres over the solar cycle. B-class flares are negatively correlated with all SGs at maximum but positively correlated at minimum. C-class flares correlate best with α and β SGs. M-class flares correlate best with β
γ
δ and β SGs. X-class flares correlate highest with β
γ
δ SGs. The flaring rate of each flare class is lowest for α SGs and highest for β
γ
δ SGs. The flaring rates are higher in the southern hemisphere than in the northern hemisphere. Our results demonstrate that solar flares originate from different sources of solar active regions; the high-energy flares tend to be caused by more complex magnetic fields.
Radar Perspective of the Aristarchus Pyroclastic Deposit and Implications for Future Missions
Authors: Morgan G. A. , Jawin E. R. , Campbell B. A. , Patterson G. W. , Bramson A. M. , Nypaver C. A. , Stopar J. D. , Jozwiak L. M. , Stickle A. M. , Bhiravarasu S. S.
Published: November 2023

The Aristarchus plateau represents one of the most complex volcanic provinces on the lunar surface and is host to the largest pyroclastic deposit on the Moon. Lunar pyroclastic deposits offer a window into the Moon’s interior and represent a valuable resource to support a sustained human presence. We present a new analysis of the Aristarchus pyroclastic deposit using Mini-RF bistatic radar data at wavelengths of 4.2 and 12.6 cm. Building on previous Earth-based Arecibo Observatory radar studies at 12.6 and 70 cm, we place further constraints on the spatial extent of the pyroclastic deposit and investigate the clast size distribution and provenance of foreign material distributed within the formation. Concentrations of blocky material >0.5 cm in diameter and suspended within the upper decimeters of the pyroclastic deposit are associated with potential buried mare flows along the rim of Vallis Schröteri and discrete pockets of primary material ejected by the Aristarchus impact. Unraveling the deposit from nonpyroclastic materials and the surrounding landscape creates new constraints with which to reconstruct the volcanic history of the region. From a future mission perspective, the identification of primary Aristarchus material distributed across the plateau offers an opportunity to sample diverse volcanic lithologies within an area that could be sampled by a single Commercial Lunar Payload Services mission. In terms of lunar resource in situ utilization, such ejected material also represents a contaminant; thus, radar data provide an invaluable tool to identify pristine pyroclastic material for mission planners.
The Association of High Sensitivity C-reactive protein and Nitric Oxide with Elevated Blood Pressure during Dialysis in Intradialytic Hypertension
Authors: Palar Stella , Sugeng Cerelia , Umboh Octavianus , Gosal Fandy , Natalia Cynthia
Published: November 2023

BACKGROUND: Hemodialysis (HD) is a procedure to replace part of kidney function in patients with end-stage kidney disease. Hemodynamic disturbances during HD may include elevated blood pressure (BP). It is reported that about 5–15% of patients undergoing regular HD have increased BP during HD. This condition is called intradialytic hypertension (IDH). Increased high sensitivity C-reactive protein (hs-CRP) levels are associated with decreased endothelial dilatation response of blood vessels. Nitric Oxide (NO) is one of the mediators that act as a vasodilator to regulate vascular pressure. Endothelial dysfunction is one of the factors thought to contribute to the incidence of IDH.
AIM: This study aimed to determine the association of hs-CRP and NO with elevated BP in IDH.
METHODS: This observational cross-sectional study was conducted at Prof. Dr. R.D. Kandou General Hospital, Manado, from November 2021 to April 2022. Participants were selected through consecutive sampling methods. The levels of hs-CRP and NO were examined in all patients. The correlation between hs-CRP and NO was performed using the Spearman test, while the association of hs-CRP and NO with elevated BP was performed using the Fisher- exact test or Chi-square test.
RESULTS: Forty patients were included in this study. The median hs-CRP, NO, and systolic BP (SBP) of the patients were 6.55 mg/dL (0.50–43.5),  27.77  mg/dL (3.65–72.19), and 20 mmHg (10–30), respectively. The correlation analysis showed that there was a strong significant negative correlation between hs-CRP levels and NO (r = −0.680, p = 0.000). Based on the Chi-Square or Fisher Exact test, there was a significant association between hs-CRP levels and elevated SBP (OR = 5.06; 95% CI = 1.095–23.44; p = 0.040), as well as between NO levels and elevated SBP (OR = 17.14; 95% CI = 3.063–95.938; p = 0.000).
CONCLUSION: There was a significant association between hs-CRP and NO levels with elevated SBP in end-stage renal disease (ESRD) patients with IDH. ESRD on hemodialysis (ESRD on R-HD) patients with hs-CRP ≤3 mg/dL or NO levels <25 mg/dL tends to have increased SBP ≥20 mmHg after HD compared to ESRD patients with low hs-CRP or high NO levels.
The potential of Colocasia esculenta tuber and Zingiber officinale rhizome combined extracts to ameliorate inflammation in monosodium iodoacetate-osteoarthritis rat model
Authors: Sandhiutami Ni Made Dwi , Desmiaty Yesi , Sumiyati Yati , Baihaqi Asma Fauziyah , Gracia Myra
Published: November 2023

This study aims to evaluate effect of Colocasia esculenta and Zingiber officinale combined extract (CEZO) in osteoarthritis rats. Twenty-four Wistar rats were split into normal group, positive group, negative group, and CEZO group on 29th to 43rd day (n = 6). All rats were injected with Na-iodoacetate intraarticularly on first day, unless for the normal group, and then observing the diameter of knee edema until the 28th day (OA rats). On the 43rd day, rats were euthanasia for measurements of hematology, spleen weight, and inflammatory mediators of nitric oxide, matrix metalloproteinase 9, Interleukin-6, and tumor necrosis factor-α using ELISA kit. Our experiments showed that CEZO 90 mg/kgBW was able to decrease knee edema, leukocytes, lymphocytes, spleen enlargement, the concentration of mediators inflammatory NO, TNF-α, IL-6, and protect cartilage degradation by decreased MMP-9 significantly in OA rats. Conclusion of the research is the CEZO 90 mg/kgBW supplementation has potential to be used in osteoarthritis.
Ce que coûte l’adoption internationale
Authors: Loncan Anne
Published: November 2023

Ayant mené de multiples thérapies familiales psychanalytiques auprès de familles qui ont adopté à l’étranger, l’auteur s’interroge sur la participation de l’argent à la création d’une nouvelle famille. La richesse, même relative, apparaît ici comme un facilitateur lors du processus initial : manquant pour l’une des parties (parents biologiques, orphelinat, pays), elle est suffisamment présente chez les parents adoptifs, de sorte que l’échange devrait être satisfaisant. Toutefois, nombre de fantasmes culpabilisants infiltrent le processus (achat, rapt, vol). S’ils sont combattus par les fantasmes concurrents d’altruisme ou de salvation, les néo-liens parents-enfants restent durablement entachés par les contenus précédents qui y circulent, induisant des affects de haine et des comportements punitifs. Ces écueils sont d’autant plus dangereux que l’adoption est plus tardive. La thérapie familiale psychanalytique permet d’en modérer les effets destructeurs.
Achats compulsifs et thérapie psychanalytique de famille ou de couple
Authors: Sourgen Jean-Louis
Published: November 2023

Après avoir décrit les achats compulsifs et les différentes thérapies proposées pour leur traitement, l’auteur montre avec quelques vignettes cliniques que ce symptôme trouve souvent dans le couple ou la famille des complémentarités inconscientes et que cela légitime dans certains cas l’organisation d’une thérapie psychanalytique de couple ou de famille. Il montre ensuite l’exemple d’une thérapie de couple et propose l’indication de la thérapie psychanalytique de couple ou de famille lorsque cela apparaît pertinent et réalisable.
Quel est le prix du soin ?
Authors: Hiers Svetlana
Published: November 2023

Le groupe multifamilial parents-enfants est organisé en pratique libérale. Le patient-famille finance la prise en charge ; en contrepartie, il reçoit un service – le soin psychologique en groupe. L’autrice développe une réflexion pour estimer le juste prix de ce soin groupal. La mixité sociale dans le GMF qui reçoit familles modestes et d’autres très riches impose d’établir un tarif différencié en fonction des revenus. La façon dont les patients règlent la séance est un indicateur précis du mouvement transférentiel, tout autant que le règlement du paiement symbolique par les enfants dans ce dispositif multifamilial.
La vie privée en ligne : utopie ou réalité ? Comprendre la vulnérabilité perçue relative aux données personnelles
Authors: Deslée Alex
Published: November 2023

• Objectif Cet article propose de mieux comprendre la vulnérabilité perçue relative aux données personnelles, laquelle peut générer des comportements négatifs pour les performances de l’entreprise, tels que l’évitement ou la falsification des données personnelles. • Méthodologie Des entretiens de groupe ont été menés auprès de 32 consommateurs, puis analysés à l’aune du cadre conceptuel des ressources-contrôle afin de mieux comprendre les antécédents et les conséquences de la vulnérabilité perçue relative aux données personnelles. Dans un second temps, sur la base des résultats, des entretiens avec des praticiens dans divers métiers du marketing et de la data ont permis de développer et d’ajuster des préconisations managériales visant à atténuer les perceptions de vulnérabilité du consommateur. • Résultats L’analyse de l’étude qualitative met au jour deux formes de ressources limitées individuelles (le manque de connaissances des usages des données personnelles et de leurs risques pour la vie privée et l’incapacité à protéger sa vie privée) ainsi que deux formes de contrôle restreints structurels (contrôle des données personnelles et transparence sur les modes de collecte et d’usages des données) qui sont considérées comme des antécédents de la vulnérabilité des consommateurs. Des manœuvres d’adaptation défensives et non-défensives à ces perceptions de vulnérabilité ont également été identifiées. • Implications managériales Des implications managériales destinées au e-commerce ont été co-développées avec des praticiens pour favoriser des pratiques marketing éthiques qui visent à réduire la vulnérabilité perçue par les consommateurs. • Originalité Cette recherche met en œuvre empiriquement le cadre conceptuel des ressources-contrôle pour offrir une analyse holistique de la vulnérabilité perçue par les consommateurs dans le contexte du commerce en ligne.
L’auto-organisation dans les activités équestres : passion pour la pratique ou passion pour l’animal
Authors: Eslan Camille , Costa Sandrine , Vial Céline
Published: November 2023

• Objectif De plus en plus de Français pratiquent des sports et loisirs en dehors des fédérations, choisissant ainsi l’auto-organisation. Or, les raisons de ce choix restent encore à préciser. Afin d’apporter un nouvel éclairage à la littérature sur le sujet, cette recherche interroge les déterminants de l’auto-organisation, en prenant le cas d’étude des activités de loisirs équestres. • Méthodologie Utilisant le concept de participation client et la théorie de l’attachement, et sur la base d’une analyse qualitative de trente entretiens semi-structurés, cet article étudie les motivations et les ressources nécessaires qui conduisent le consommateur à s’auto-organiser. • Résultats Les résultats mettent en évidence deux grandes motivations initiales pour l’auto-organisation : la passion pour l’activité ou la passion pour un mode de vie avec son animal. L’attachement à l’animal, mais aussi l’accès aux différentes ressources (qui peuvent être facilitatrices ou freins de l’auto-organisation) apparaissent comme fondamentaux. • Implications managériales Des stratégies managériales sont proposées pour repenser la conception de services proposés par les professionnels dans l’objectif de mieux accompagner les usagers auto-organisés. • Originalité Cette recherche met en évidence les rôles modérateurs i) des liens sociaux sur les ressources et ii) de l’attachement sur le choix de l’auto-organisation, dans le cas des activités récréatives.
Optimiser grâce aux algorithmes et aux données urbaines ? Promesses, caractéristiques et offre réelle des start-up pour la ville intelligente
Authors: Picaud Myrtille
Published: November 2023

La ville dite intelligente a été étudiée à l’aune de ses discours, des grandes firmes qui la portaient et des politiques effectivement menées dans les collectivités. Si les start-up sont régulièrement citées comme des actrices centrales du développement économique de la ville numérique, elles ont pourtant peu été étudiées à cet égard. À distance des imaginaires, quelle est la contribution réelle des start-up à la ville intelligente ? Comment se saisissent-elles des opportunités économiques et techniques liées à la circulation des données urbaines ? Cet article étudie les caractéristiques de ces start-up , leurs discours sur la ville intelligente et l’offre réelle qu’elles proposent. Il s’appuie principalement sur la constitution d’une base de données de start-up en France et des entretiens. D’abord, le paysage diversifié de la ville numérique est présenté, révélant des start-up semblables à celles opérant dans les autres domaines. Ensuite, la logique modélisatrice qui sous-tend leur offre pour les collectivités territoriales, destinée à optimiser la gestion urbaine, voire à la prédire , est étudiée. Néanmoins, cette logique rencontre certaines limites car les données restent toujours insuffisantes. Leur offre porte alors plutôt sur la diffusion d’instruments (capteurs, données et modélisations) avec la promesse de rendre la ville modélisable, et donc intelligente  – un horizon qui semble toujours reculer à mesure que se multiplient et se complexifient ces instruments.
L’Union européenne face à son étiolement démographique
Authors: Parant Alain
Published: November 2023

Eurostat, le service de la Commission européenne en charge de l’information statistique, a récemment publié de nouvelles perspectives de population pour l’Union européenne et chacun des 27 États membres sur la période 2022-2100 (EuroPop 2023). Même affectées d’une évidente marge d’incertitude associée à la définition d’hypothèses peu ou prou discutables (voir encadré ci-contre), ces perspectives confirment la faible vitalité démographique intrinsèque de l’Union européenne, l’intensification de son vieillissement et sa dépendance forte à l’apport de population extérieure.
Présentation
Authors: de Jouvenel Hugues
Published: November 2023

La mondialisation et l’essor des échanges commerciaux internationaux étaient des tendances lourdes des dernières décennies du siècle passé, notamment sous l’effet de l’éclatement des chaînes de valeur. Mais la pandémie de Covid, puis la guerre en Ukraine et les tensions entre la Chine et les États-Unis, ainsi que les politiques que ces deux pays ont adoptées, ont suscité depuis quelque temps en Europe une inquiétude et un espoir : une inquiétude depuis que l’Union européenne s’est rendu compte qu’elle était tributaire, par exemple pour ses approvisionnements en produits pharmaceutiques, d’ingrédients actifs qu’elle devait importer ; un espoir, celui de réussir à opérer une relocalisation de la production sur son territoire et, à défaut, de diversifier l’origine de ses importations. Les avantages de l’étalement des chaînes de valeur se sont alors révélés moindres que les inconvénients, la situation devenant nuisible à l’autonomie stratégique de l’Europe, à celle de ses États membres et à celle de ses entreprises. Comment donc ont évolué ces chaînes de valeur depuis cette prise de conscience et les résolutions alors adoptées, y compris le plan de relance de l’Union européenne (NextGenerationEU) adopté en décembre 2020, la « Facilité pour la reprise et la résilience » (REPowerEU), entrée en vigueur en février 2021, et sa déclinaison dans les pays membres ? Rappelons enfin, sur ce dossier, que le Fonds monétaire international (FMI) et l’Organisation mondiale du commerce (OMC), 15 jours avant le sommet du G20 à New Dehli des 9 et 10 septembre 2023, s’alarmaient d’un commerce mondial de plus en plus « fragmenté » ? Dénonçant le « découplage technologique », Kristalina Georgieva, directrice générale du FMI, écrivait, fin août : « À mesure que les échanges commerciaux diminuent et que les barrières augmentent, la croissance mondiale sera durement touchée. » Elle estime que « la croissance économique mondiale d’ici 2028 ne dépassera pas 3 % par an, soit la prévision quinquennale la plus basse des trois dernières décennies » 1 . À quoi la secrétaire américaine au Commerce, Gina Raimondo, répond : « Nous ne chercherons jamais à découpler ou à freiner l’économie chinoise » ; ajoutant : « nous ne faisons aucun compromis ni ne négocions en matière de sécurité nationale »… Afin d’amorcer la réflexion sur le sujet des dépendances stratégiques, nous publions dans ce bref dossier deux articles : l’un de Vincent Vicard et Pauline Wibaux, du CEPII (Centre d’études prospectives et d’informations internationales) ; l’autre d’Aymeric Lachaux, de la direction générale du Trésor.  H.J.
Friedrich Nietzsche : prophète ou futurologue ?
Authors: Granarolo Philippe
Published: November 2023

Le philosophe allemand Friedrich Nietzsche (1844-1900) a-t-il inventé la méthode des scénarios ? C’est une thèse que propose ici Philippe Granarolo, professeur agrégé de philosophie et auteur de plusieurs ouvrages sur ce penseur, parmi lesquels Nietzsche. Cinq scénarios pour le futur 1 . Son article, qui met en scène les scénarios successifs imaginés par Nietzsche au cours la période 1873-1881, est troublant à plus d’un titre : L’itinéraire prospectif accompli par Nietzsche en sept ans (allant de scénarios créatifs du type New Age aux scénarios « techno-triomphalistes » puis aux scénarios apocalyptiques) ressemble fort à celui qui a été emprunté par le monde de la prospective depuis 40 ans et qui nous a menés des visions enthousiastes d’un Alvin Toffler, aux théories de l’effondrement déployées par les collapsologues actuels. La question qui taraudait Nietzsche à la fin du XIX e siècle — l’avenir de la civilisation occidentale — résonne fortement avec nos interrogations contemporaines. Sur le plan de la méthode, Nietzsche utilise déjà des concepts qui sont apparus bien plus tard dans la littérature prospective, comme celui de « bifurcation » (il parle, lui, de « croisée des chemins »). Ce futur d’antan de Philippe Granarolo revient en détail sur cet aspect de la pensée de Nietzsche. Jean Haëntjens