bluuebunny/crossref_metadata_2025 huggingface dataset:
The Paleochrono-1.1 probabilistic model to derive optimized and consistent chronologies for several paleoclimatic sites
Authors: Parrenin Frédéric , Bouchet Marie , Buizert Christo , Capron Emilie , Corrick Ellen , Drysdale Russell , Kawamura Kenji , Landais Amaëlle , Mulvaney Robert , Oyabu Ikumi , Rasmussen Sune
Published: February 2024

Abstract. Past climate and environmental changes can be reconstructed using paleoclimate archives such as ice cores, lake and marine sediment cores, speleothems, tree rings and corals. The dating of these natural archives is crucial for deciphering the temporal sequence of events and rates of change during past climate changes. It is also essential to provide quantified estimates of the absolute and relative errors associated with the inferred chronologies. However, this task is complex since it involves combining different dating approaches at different paleoclimatic sites and often on different types of archives. Here we present Paleochrono-1.1, a new probabilistic model to derive a common and optimised chronology for several paleoclimatic sites with potentially different types of archives. Paleochrono-1.1 is based on the inversion of an archiving model: a varying deposition rate (also named growth rate, sedimentation rate or accumulation rate) and also, for ice cores, a lock-in-depth of air (since, in the absence of significant surface melt, the air is trapped in the ice at about 50–120 m below the surface) and a thinning function (since glacier ice undergoes flow). Paleochrono-1.1 integrates several types of chronological information: prior knowledge of the archiving process, independently dated horizons, depth intervals of known duration, undated stratigraphic links between records, and, for ice cores, Δdepth observations (depth differences between events recorded synchronously in the gas and solid phases of a certain core). The optimization is formulated as a least-squares problem, assuming that all probability densities are near-Gaussian and that the model is nearly linear in the vicinity of the best solution. Paleochrono-1.1 is the successor of IceChrono, which produces common and optimized chronologies for ice-cores. Paleochrono1.1 outperforms IceChrono in terms of computational efficiency, ease of use, and accuracy. We demonstrate the ability of Paleochrono-1.1 in a new ice-core–speleothem dating experiment, which combines the Antarctic Ice Core Chronology 2023 dating experiment, based on records from five polar ice cores, with data from two speleothems dated using uranium/thorium radiometric techniques from Hulu Cave (China). We analyse the performance of Paleochrono-1.1 in terms of computing time and memory usage in various dating experiments. Paleochrono-1.1 is freely available under the MIT open-source license.
Exploring the Potential of History Matching for Land Surface Model Calibration
Authors: Raoult Nina , Beylat Simon , Salter James M. , Hourdin Frédéric , Bastrikov Vladislav , Ottlé Catherine , Peylin Philippe
Published: February 2024

Abstract. With the growing complexity of land surface models used to represent the terrestrial part of wider Earth system models, the need for sophisticated and robust parameter optimisation techniques is paramount. Quantifying parameter uncertainty is essential for both model development and more accurate projections. In this study, we assess the power of history matching by comparing results to variational data assimilation, commonly used in land surface models for parameter estimation. Although both approaches have different setups and goals, we can extract posterior parameter distributions from both methods and test the model-data fit of ensembles sampled from these distributions. Using a twin experiment, we test whether we can recover known parameter values. Through variational data assimilation, we closely match the observations. However, the known parameter values are not always contained in the posterior parameter distribution, highlighting the equifinality of the parameter space. In contrast, while more conservative, history matching still gives a reasonably good fit and provides more information about the model structure by allowing for non-Gaussian parameter distributions. Furthermore, the true parameters are contained in the posterior distributions. We then consider history matching's ability to ingest different metrics targeting different physical parts of the model, helping to reduce parameter space further and improve model-data fit. We find the best results when history matching is used with multiple metrics; not only is the model-data fit improved, but we also gain a deeper understanding of the model and how the different parameters constrain different parts of the seasonal cycle. We conclude by discussing the potential of history matching in future studies.
Exploring ozone variability in the upper troposphere and lower stratosphere using dynamical coordinates
Authors: Millán Luis F. , Hoor Peter , Hegglin Michaela I. , Manney Gloria L. , Boenisch Harald , Jeffery Paul , Kunkel Daniel , Petropavlovskikh Irina , Ye Hao , Leblanc Thierry , Walker Kaley
Published: February 2024

Abstract. Ozone trends in the upper troposphere/lower stratosphere (UTLS) remain highly uncertain because of sharp spatial gradients and large variability caused by competing transport, chemical, and mixing processes near the upper tropospheric jets and extra-tropical tropopause, as well as inhomogeneous spatially and temporally limited observations of the region. Subtropical jets and the tropopause act as transport barriers, delineating boundaries between atmospheric regimes controlled by different processes; they can thus be used to separate data taken in those different regimes for numerous purposes, including trend assessment. As part of the Observed Composition Trends And Variability in the UTLS (OCTAV-UTLS) Stratosphere-troposphere Processes And their Role in Climate (SPARC) activity, we assess the effectiveness of several coordinate systems in segregating air into different atmospheric regimes. To achieve this, a comprehensive dynamical dataset is used to reference every measurement from various observing systems to the locations of jets and tropopauses in different coordinates (e.g., altitude, pressure, potential temperature, latitude, and equivalent latitude). We assess which coordinate combinations are most useful for dividing the measurements into bins such that the data in each bin is affected by the same processes, thus minimizing the variability induced when combining measurements from different dynamical regimes, each characterized by different physical processes. Such bins will be particularly suitable for combining measurements with different sampling characteristics and for assessing trends and attributing them to changing atmospheric dynamics.
Using Sentinel-1 wet snow maps to inform fully-distributed physically-based snowpack models
Authors: Cluzet Bertrand , Magnusson Jan , Quéno Louis , Mazzotti Giulia , Mott Rebecca , Jonas Tobias
Published: February 2024

Abstract. Distributed energy and mass-balance snowpack models at sub-kilometric scale have emerged as a tool for snow-hydrological forecasting over large areas. However, their development and evaluation often rely on a handful of well observed sites on flat terrain with limited topographic representativeness. Validation of such models over large scales in rugged terrain is therefore necessary. Remote sensing of wet snow has always been motivated by its potential utility in snow hydrology. However, its concrete potential to enhance physically based operational snowpack models in real time remains unproven. Wet snow maps could potentially help refining the temporal accuracy of simulated snowmelt onset, while the information content of remotely sensed snow cover fraction pertains predominantly to the ablation season. In this work, wet snow maps, derived from Sentinel-1 and snow cover fraction (SCF) retrieval from Sentinel-2 are compared against model results from a fully distributed energy-balance snow model (FSM2oshd). The comparative analysis spans the winter seasons from 2017 to 2021, focusing on the geographic region of Switzerland. We use the concept of wet snow line (WSL) to compare Sentinel-1 wet snow maps with simulations. We show that while the match of the model with flat-field snow depth observation is excellent, the WSL reveals insufficient snow melt in the southern aspects. Amending the albedo parametrization within FSM2oshd allowed achieving earlier melt in such aspects preferentially, thereby reducing WSL biases. Biases with respect to Sentinel-2 snow line (SL) observations were also substantially reduced. These results suggest that wet snow maps contain valuable real-time information for snowpack models, nicely complementing flat-field snow depth observations, particularly in complex terrain and at higher elevations. The persisting correlation between wet snow line and snow line biases provides insights into refined development, tuning and data assimilation methodologies for operational snow-hydrological modelling.
Total Air Content measurements from the RECAP ice core
Authors: Vudayagiri Sindhu , Vinther Bo , Freitag Johannes , Langen Peter L. , Blunier Thomas
Published: February 2024

Abstract. Total air content (TAC) of the REnland ice CAP project (RECAP) core, drilled in summer 2015, is measured as a part of investigating the elevation history of the Greenland Ice Sheet (GIS). TAC is a proxy for the elevation at which the ice was originally formed as the TAC in ice cores is predominantly influenced by surface air pressure and conditions like temperature and local summer insolation. The RECAP TAC data shows incoherently low values in the Holocene climatic optimum (6 to 9 kyr b2k) and in the Eemian (119 to 121 kyr b2k) which renders the TAC data unfit for paleo elevation interpolation. In contrast, the glacial section (11.7 kyr to 119 kyr b2K) has consistent TAC values thus in principle facilitating the past elevation calculations. However, we observe TAC variations related to Dansgaard-Oeschger events (D-O) that cannot originate from elevation changes but must be linked to changes in the firn structure. We analyse the pattern of the structural changes in the RECAP and NGRIP cores. For the melt affected sections (Holocene and Eemian) we use melt affected TAC to reconstruct summer temperatures.
Misidentified subglacial lake beneath the Devon Ice Cap, Canadian Arctic: A new interpretation from seismic and electromagnetic data
Authors: Killingbeck Siobhan F. , Rutishauser Anja , Unsworth Martyn J. , Dubnick Ashley , Criscitiello Alison S. , Killingbeck James , Dow Christine F. , Hill Tim , Booth Adam D. , Main Brittany , Brossier Eric
Published: February 2024

Abstract. In 2018 the first subglacial lake in the Canadian Artic was proposed to exist beneath Devon Ice cap, based on the analysis of airborne radar data. Here, we report a new interpretation of the subglacial material beneath Devon Ice Cap, supported by data acquired from multiple surface-based geophysical methods in 2022. The geophysical data recorded included 9 km of active source seismic reflection profiles, 7 transient electromagnetic soundings and 17 magnetotellurics stations. These surface-based geophysical datasets were collected above the inferred locations of the subglacial lakes and show no evidence for the presence of subglacial water. The acoustic impedance of the subglacial material, estimated from the seismic data, is 9.49 ± 1.92 x 106 kg m-2 s-1, comparable to consolidated or frozen sediment. The resistivity models obtained by inversion of both the transient electromagnetic and magnetotelluric measurements show the presence of highly resistive rock layers (1000 – 100000 Ω.m) directly beneath the ice. Re-evaluation of the airborne reflectivity data show that the radar attenuation rates were likely overestimated, leading to an overestimation of the basal reflectivity in the original radar studies. Here, we derive new radar attenuation rates using the temperature- and chemistry-dependent Arrhenius equation, and when applied to correct the returned bed power, the bed power does not meet the basal reflectivity threshold expected over subglacial water. Thus, the radar interpretation is now consistent with the seismic and electromagnetic observations of dry or frozen, non-conductive basal material.
When and why microbial-explicit soil organic carbon models can be unstable
Authors: Schwarz Erik , Ghersheen Samia , Belyazid Salim , Manzoni Stefano
Published: February 2024

Abstract. Microbial-explicit soil organic carbon (SOC) cycling models are increasingly recognized for their advantages over linear models in describing SOC dynamics. These models are known to exhibit oscillations, but it is not clear when they yield stable vs. unstable equilibrium points (EPs) – i.e. EPs that exist analytically, but are not stable to small perturbations and cannot be reached by transient simulations. Occurrence of such unstable EPs can lead to unexpected model behaviour in transient simulations or unrealistic predictions of steady state soil organic carbon (SOC) stocks. Here we ask when and why unstable EPs can occur in an archetypal microbial-explicit model (representing SOC, dissolved OC [DOC], microbial biomass, and extracellular enzymes) and some simplified versions of it. Further, if a model formulation allows for physically meaningful but unstable EPs, can we find constraints in the model parameters (i.e. environmental conditions and microbial traits) that ensure stability of the EPs? We use analytical, numerical and descriptive tools to answer these questions. We found that instability can occur when the resupply of a growth substrate (DOC) is (via a positive feedback loop) dependent on its abundance. We identified a conservative, sufficient condition on model parameters to ensure stability of EPs. Interactive effects of environmental conditions and parameters describing microbial physiology point to the relevance of basic ecological principles for avoidance of unrealistic (i.e. unstable) simulation outcomes. These insights can help to improve applicability of microbial-explicit models, aid our understanding of the dynamics of these models and highlight the relation between mathematical requirements and (in silico) microbial ecology.
New insights into the eastern Subpolar North Atlantic meridional overturning circulation from OVIDE
Authors: Mercier Herlé , Desbruyères Damien , Lherminier Pascale , Velo Antón , Carracedo Lidia , Fontela Marcos , Pérez Fiz F.
Published: February 2024

Abstract. The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the Earth's climate. However, there are few long series of observations of the AMOC and the study of the mechanisms driving its variability depends mainly on numerical simulations. Here, we use four ocean circulation estimates produced by different data-driven approaches of increasing complexity to analyze the seasonal to decadal variability of the subpolar AMOC across the Greenland–Portugal OVIDE line since 1993. We show that the variance of the time series is dominated by seasonal variability, which is due to both seasonal variability in the volume of the AMOC limbs (linked to the seasonal cycle of density in the East Greenland Current) and to seasonal variability in the transport of the Eastern Boundary Current. The decadal variability of the subpolar AMOC is mainly caused by changes in velocity, which after the mid-2000s are partly offset by changes in the volume of the AMOC limbs. This compensation means that the decadal variability of the AMOC is weaker and therefore more difficult to detect than the decadal variability of its velocity-driven and volume-driven components, which is highlighted by the formalism that we propose.
Vertebral osteomyelitis with Campylobacter jejuni – a case report and review of the literature of a very rare disease
Authors: Greminger Simone , Strahm Carol , Notter Julia , Martens Benjamin , Helfenstein Seth Florian , Den Hollander Jürgen , Frischknecht Manuel
Published: February 2024

Abstract. Infections with Campylobacter species mainly cause gastrointestinal disease and are usually self-limiting. Systemic complications such as bacteremia and osteoarticular infections are rare. Here we report a very rare case of a vertebral osteomyelitis due to C. jejuni, and we reviewed the literature for similar cases, identifying six other cases. Therapy should be guided on resistance testing if available due to emerging resistance rates, especially to fluoroquinolones. Azithromycin may be a treatment option for C. jejuni spondylodiscitis.
Coupling MAR (Modèle Atmosphérique Régional) with PISM (Parallel Ice Sheet Model) mitigates the positive melt–elevation feedback
Authors: Delhasse Alison , Beckmann Johanna , Kittel Christoph , Fettweis Xavier
Published: February 2024

Abstract. The Greenland Ice Sheet is a key contributor to sea level rise. By melting, the ice sheet thins, inducing higher surface melt due to lower surface elevations, accelerating the melt coming from global warming. This process is called the melt–elevation feedback and can be considered by using two types of models: either (1) atmospheric models, which can represent the surface mass balance (SMB), or SMB estimates resulting from simpler models such as positive degree day models or (2) ice sheet models representing the surface elevation evolution. The latter ones do not represent the surface mass balance explicitly as well as polar-oriented climate models. A new coupling between the MAR (Modèle Atmosphérique Régional) regional climate model and the PISM (Parallel Ice Sheet Model) ice sheet model is presented here following the CESM2 (Community Earth System Model; SSP5-8.5, Shared Socioeconomic Pathway) scenario until 2100 at the MAR lateral boundaries. The coupling is extended to 2200 with a stabilised climate (+7 ∘C compared to 1961–1990) by randomly sampling the last 10 years of CESM2 to force MAR and reaches a sea level rise contribution of 64 cm. The fully coupled simulation is compared to a one-way experiment where surface topography remains fixed in MAR. However, the surface mass balance is corrected for the melt–elevation feedback when interpolated on the PISM grid by using surface mass balance vertical gradients as a function of local elevation variations (offline correction). This method is often used to represent the melt–elevation feedback and prevents a coupling which is too expensive in computation time. In the fully coupled MAR simulation, the ice sheet morphology evolution (changing slope and reducing the orographic barrier) induces changes in local atmospheric patterns. More specifically, wind regimes are modified, as well as temperature lapse rates, influencing the melt rate through modification of sensible heat fluxes at the ice sheet margins. We highlight mitigation of the melt lapse rate on the margins by modifying the surface morphology. The lapse rates considered by the offline correction are no longer valid at the ice sheet margins. If used (one-way simulation), this correction implies an overestimation of the sea level rise contribution of 2.5 %. The mitigation of the melt lapse rate on the margins can only be corrected by using a full coupling between an ice sheet model and an atmospheric model.
Assessing the Impact of ICT, Tourism, Globalization and Urbanization on Environmental Degradation and Economic Growth
Authors: Parveen Asma , Mehmood Kashif , Javed Maryam
Published: February 2024

This study explores the impact of information and communication technology (ICT), tourism, globalization, and urbanization on the economic growth and environmental degradation of middle-income countries classified as overall, upper and lower-middle-income countries. It uses a micro panel dataset of 65 nations from 2000 to 2021 through a two-step Generalized Method of Moment estimation approach.   The results indicate that the influence of ICT on environmental degradation differs across nation groups. Overall countries have a harmful effect, upper-middle countries exhibit a beneficial influence, and lower-middle countries show no significant link. Tourism continually causes environmental deterioration in all sorts of nations, emphasizing the need for eco-friendly tourist initiatives.   Globalization has been seen to have a positive correlation with environmental degradation in countries classified as Overall and Upper-middle income, but a negative correlation in Lower-middle-income nations.   Urbanization has a favorable influence on environmental deterioration in Overall and Lower-middle-income nations, but it does not have a significant impact in Upper-middle-income countries.  These findings underscore the need to tackle the environmental impacts of information and communication technology (ICT), tourism, globalization, and urbanization. To attain a greener and more sustainable future while fostering economic growth, policymakers should prioritize sustainable development, introduce energy-efficient technologies, encourage responsible tourism practices, enforce environmental regulations, and advocate for inclusive urban planning.
Sustainability Development Goals Initiatives of Multinational firms: Empirical Evidence from Emerging Economy
Authors: Ahmed Iftikhar , Saeed Abubakr
Published: February 2024

MNCs are regarded as one of the essential actors within the private sector that have a greater capability and outreach to address these wicked global challenges identified by the UN in 2015. Surprisingly, despite their important role in achieving SDGs, there is a lack of knowledge on the nature and extent of MNCs’ engagement in sustainable development programs (van der Waal and Thijssens, 2020). This study aims to address this issue by examining the characteristics (organizational size, and location) that influence firms’ engagement in SDGs initiatives that target to increase positive externalities. The results suggest that size and location exert a positive impact on the firm’s involvement in activities that increase positive externalities. These results have important theoretical and policy implications.
A Systemic Contribution and Vulnerability of Non-financial Firms: A Cross Industry Analysis
Authors: Azam Zafar , Raheman Abdul , Rashid Abdul
Published: February 2024

This paper quantifies the systemic importance of non-financial firms by assessing their contribution and vulnerability to systemic shocks. We apply two firm-specific measures, namely Delta CoVaR (ΔCoVaR) and Marginal Expected Shortfall (MES), to evaluate the systemic risk of 205 non-financial firms listed on the Pakistan Stock Exchange over the period from 2005-2021. We apply quantile regression methodology to quantify (ΔCoVaR). We confirm that a significant number of firms contribute to both system-wide shocks and are vulnerable to systemic risk of the whole system. We find that firms with a high-risk score in one area are not always high-risk in another. Measures of systemic risk vary significantly across time, between firms and industries. Energy and transport industries are top contributors to systemic risk however, tobacco and pharmaceuticals are among the top industries that are vulnerable to systemic risk of the whole system. We conclude that non-financial firms are systemically important and this risk should be mitigated. This research offers significant insights for policymakers and other relevant stakeholders both domestically and internationally. It aims to help policymakers examine their macro-prudential policy, which now solely takes into account financial firms, to limit the risk that can spread throughout the entire system.
Neural machine translation in AVT teaching in China: An in-depth analysis from the readability perspective
Authors: Wang Qingran , Xu Jun
Published: February 2024

As audiovisual translation (AVT) becomes more complex and diverse, the need for advanced machine learning techniques has been increasing sharply, driving the widespread adoption of neural machine translation (NMT) technology in the field. This study contributes to the literature by evaluating the performance of NMT technology in AVT teaching. Based on readability theory, we constructed an evaluation framework with 12 indicators, built comparable corpora consisting of human and post-edited subtitle translations of corporate videos, and used them to examine the performance of four online NMT systems (Google Translate, Baidu Translate, Bing Translator, and Youdao Translate) in AVT teaching. Our statistical analyses and case studies show that Google Translate outperforms the other three platforms in all the readability tests, and it can enhance the readability of post-edited subtitles at five levels (word, syntax, textbase, situation model, genre and rhetorical). The performance of the other three platforms varies across different tests. Concrete examples are provided to substantiate the statistical analyses. Our study adds value to existing research both by examining the application and performance of NMT in AVT teaching and by suggesting potential directions for the refinement of current NMT systems.
PENGARUH PERMAINAN KASTI TERHADAP LARI SPRINT 40 M SISWA KELAS V SDN 2 MUARA RUPIT
Authors: Saleh Khairul , Mori Saputra Deka Ismi , Hamzah Iri , Zunarti Rita , Apdoludin Apdoludin , Sari Yuliani Puspita
Published: February 2024

ABSTRACT

 

This research is motivated by the low ability of students in running, especially in the 40M sprint learning lesson. The purpose of this classroom action research is to see the effect of baseball on the 40M sprint for fifth grade students at SDN 2 Muara Rupit.

The method in this study is a quasi-experimental design or quasi-experimental, with one group pretest and posttest design. The population of this study was 229 students and the sampling technique was purposive sampling, the sample of this study was the fifth grade students of SDN 2 Muara Rupit. totaling 25, 10 women and 15 sons. The instrument used was the 40M running test. The data analysis technique of this research used t-test with a significant level of 0.05.

The results showed that there was a significant effect between baseball game training on the 40M sprint run for fifth grade students at SDN 2 Muara Rupit. The results of the t-test obtained the value of tcount=12.10 while ttable=2.06 with a significance level of 0.05. these results show that tcount is greater than ttable. Then Ha is accepted and Ho is rejected if Ha is accepted.

 

 

Keywords: Sprint, 40 Meter, Game, Kasti.
Meningkatkan Kemampuan Shooting Bola Basket Dengan Menggunakan Permainan Target Pada Siswa Kelas XI SMA Negeri 12 Bungo
Authors: Irman Irman
Published: February 2024

Abstract

             This research was motivated by the difficulties of students shooting into the ring and the students' throwing was still too weak so the balls thrown were not quite on target. Seeing the problems that occur in class XI students at SMA Negeri 12 Bungo, a more effective and efficient learning approach is needed. An approach that leads to how students are trained to be serious, motivated and accustomed to throwing throwing objects precisely to a predetermined place. The learning approach is with a target game.

The study used a Classroom Action Research design which was carried out in two cycles, each cycle consisting of planning, implementing actions, observing and reflecting. The subjects of this study were 20 students of class XI at SMA Negeri 12 Bungo. Data on basketball learning outcomes were obtained through performance tests, observation sheets were used to collect data on student activities in participating in the basketball learning process.

The results of this study were obtained based on an assessment of the ability to shoot basketball using target games in class XI students at SMA Negeri 12 Bungo. From this aspect of the assessment, the percentage of students' completeness scores in cycle I was 40%. The results of the assessment of the aspects of learning basketball in the first cycle showed that students achieved the completeness criterion or a score of > 70. There was a significant increase from the conditions in cycle I to cycle II. The results of the basketball learning assessment obtained from cycle II were as many as 18 students who passed. While in the cycle II stage, the percentage of completeness is 90%. Of the 20 students, 18 were declared to have completed, only 2 students had not achieved completeness. Based on the results of the study, it was concluded that learning basketball through target games can improve student learning outcomes. And for Physical Education teachers, they can apply learning effectively according to Physical Education lessons, especially in learning basketball.

Keywords: Target Game, Basketball, Learning
SURVEI KEMAMPUAN SERVIS DALAM PERMAINAN BOLA VOLI KLUB TANGGO RAJO
Authors: Gian Rahmat Sahasra  , M Iqbal Al Ihsan  , Ikhsan Maulana Putra  , Titis Wulandari
Published: February 2024

Abstract

 

This research was motivated by not knowing whether the service technique used was correct or not, and not knowing the player's level of ability regarding basic volleyball techniques. This study aims to determine the level of upper serve and lower serve abilities of volleyball players at the Tanggo Rajo club, Kab. Tebo. This research uses quantitative descriptive methods. The population is all volleyball players at the Tanggo Rajo club, Kab. Tebo, numbering 15 people. The sampling technique used total sampling with a research sample of 15 players. Data collection techniques using tests. The instrument used is the American Association for Health, Physical Education, and Recreation (AAHPER) serving accuracy test. The analysis technique used is to put the frequency into percentage form. The results of this research indicate that the level of service ability of volleyball players at Tanggo Rajo Club, Kab. Tebo is sufficient considering the highest frequency, namely the sufficient category with 7 people, namely 47%. Level of service ability of Tanggo Rajo Club volleyball players, Kab. Tebo was categorized as very good at 13%, good at 13%, fair at 47%, poor at 20%, very poor at 7%. Meanwhile, the lower level of service ability of the Tanggo Rajo Club volleyball players, Kab. Tebo is sufficient considering the highest frequency, namely the sufficient category with 6 people, namely 40%. Level of lower service ability of Tanggo Rajo Club volleyball players, Kab. Tebo was categorized as very good at 7%, good at 20%, fair at 40%, poor at 33%, very poor at 0%..

Keywords : Ability, Upper Serve, Lower Serve
Katekese Umat dan Ibadat Sabda Bersama di Stasi Santo Yosef Ensibau Paroki Santa Perawan Maria Diangkat ke Surga Balai Sebut-Jangkang
Authors: Meman Oktavianey G. P. H. , Karo Karo Irfan , Sitorus Roy Nandus , Candra Candra , Dwimayodi Dwimayodi , Do Kanisius
Published: February 2024

ABSTRAK
Kegiatan Pengabdian kepada Masyarakat (PKM) ini dilakukan dengan tujuan mengadakan katekese umat sekaligus melaksanakan ibadat sabda bersama umat di stasi Santo Yosef Ensibau, Paroki Santa Perawan Maria Balai Sebut-Jangkang. Adapun tema dalam katekese umat ini adalah “berpartisipasi aktif dalam hidup menggereja”. Metode dalam kegiatan pengabdian ini adalah pembinaan iman dalam bentuk katekese umat yang diadakan setelah melaksanakan ibadat sabda di gereja stasi. Hasil kegiatan ini diharapkan agar umat, keluarga besar stasi Santo Yosef Ensibau semakin berupaya terlibat dan berartisipasi aktif dalam hidup menggereja serta juga dapat terlibat dalam kegiatan petugas ibadat sabda yang dilakukan di lingkungan maupun stasi tersebut.
 
Kata kunci: Katekese; ibadat sabda; umat
Katekese Paud/Minggu Gembira di Stasi Santo Yosef Ensibau Paroki Santa Perawan Maria Diangkat ke Surga Balai Sebut-Jangkang
Authors: Astuti Florentina Dwi , Lumban Tobing Ona Sastri , Meman Oktavianey G. P. H. , Handayani Exnasia Retno Palupi , Markus Markus , Gery Julvius
Published: February 2024

Kegiatan Pengabdian kepada Masyarakat (PKM) ini dilakukan dengan tujuan mengadakan katekese kepada PAUD (Pendidikan Anak Usia Dini) dan Minggu Gembira di stasi Santo Yosef Ensibau, Paroki Santa Perawan Maria Balai Sebut-Jangkang. Adapun tema dalam katekese ini adalah “katekese tanda salib (kepada PAUD) dan mengasihi sesama sebagai anak-anak Allah dalam terang (kepada Minggu Gembira). Metode dalam kegiatan pengabdian ini adalah pembinaan iman dalam bentuk katekese kepada PAUD dan Minggu Gembira yang diadakan hari Minggu tanggal 23 Oktober 2022 pada pagi hari sebelum di Gereja Santo Yosef Ensibau. Hasil kegiatan ini diharapkan agar umat; khususnya pengurus Gereja, pembina dan orang dewasa lainnya dapat membantu kegiatan katekese anak; PAUD/Mg yang sudah lama vakum. Serta berupaya menghidupkan kembali kegiatan katekese ini demi keberlangsungan pembinaan iman anak khsuusnya katekese PAUD/MG ini.
 
Kata kunci: Katekese anak; PAUD/Minggu Gembira
Edukasi dan Pemanfaatan Minyak Jelantah sebagai Upaya Pencegahan Pencemaran Lingkungan
Authors: Pohan Heni Mulyani , Harahap Fatma Suryani , Elisa Elisa , Sormin Ayunda Sabrina , Sahara Nur , Hrp Hafnita
Published: February 2024

The lack of knowledge and public awareness of the dangers of direct disposal of cooking oil waste is one of the reasons for doing service to housewives in Pasar Hilir village, Mandailing Natal regency. The purpose of this service is to educate housewives about the dangers of consuming used cooking oil and disposing of used cooking oil waste into local waters as well as providing training workshops on making one of the household products, namely soap, by utilizing used cooking oil waste that can be reused for washing in daily life.
Key words : cooking oil waste, soap, training
Streamlining Operations: The Impact of Effective Supplier-Manufacturer Relationships
Authors: Munir Saqib
Published: February 2024

Supply Chain Management (SCM) plays a crucial role for firms striving to maintain competitiveness amidst numerous competitors. In the contemporary business landscape, firms enhance their competitiveness by efficiently relying on their supply chain Moreover, an effective and efficient supply chain has become a vital and valuable means for staying vigilant in the evolving and competitive global business environment, contributing to overall organizational performance improvement. The term "supplier-manufacturer partnership" refers to the relationship established when a manufacturer and supplier mutually agree to collaborate based on a specific contract. This research study is quantitative in nature with population in the vicinity of Rawalpindi & Islamabad working either as manufacturer of goods or are providing the services or in the service business. Simple random sampling technique has been utilized in cross-sectional time horizon. SPSS version 22.0 was used as statistical software to carry out the analysis. The findings suggest that a stronger partnership correlates with improved supply chain performance. Furthermore, the statistical tests conducted in this research underscored the significance of business value addition, communication and trust as the most influential factors contributing to enhanced supply chain performance and overall profitability. The study also unveiled that the partnership strongly affects information flow. Moreover, when information is effectively managed, and its quality is enhanced, it fosters strong partner relations, ultimately leading to improved supply chain effectiveness and heightened performance.
Kejadian Emesis Gravidarum pada Ibu Hamil Trimester I di Desa Suciharjo Kecamatan Parengan Kabupaten Tuban
Authors: Agoesta Pralita Sari  , Isnaini Novitasari  , Alfina Meila Dwi Cahyani
Published: February 2024

Introduction : The incidence of emesis gravidarum or nausea and vomiting that occurs in pregnant women is something that should not be taken lightly. This can be fatal and have a negative impact on the health of the mother and fetus. Objective : This study aims to determine the incidence of emesis gravidarum in first trimester pregnant women in Suciharjo Village, Parengan District, Tuban Regency. Method : The design used in this research is descriptive. The sample was 45 pregnant women in the first trimester. Data collection used was using the Rhodes Index For Nausea, Vomiting, And Retching (RINVR) questionnaire with a sampling technique using purposive sampling. Results : Nearly half of pregnant women in the first trimester in Suciharjo village, Parengan district, Tuban regency experienced severe nausea and vomiting. Conclusion : Description of the incidence of emesis gravidarum in first trimester pregnant women in Suciharjo village, Parengan district, Tuban regency, almost half of whom experienced severe nausea and vomiting.
EMPIRICAL MODELS’ APPLICABILITY FOR CALCULATING THE CENTRIFUGAL PUMP'S IMPELLERS GEOMETRIC PARAMETERS
Authors: Bostan Viorel , Petco Andrei , Șaragov Ion
Published: February 2024

This paper deals with the comparison of empirical computational models used to achieve the geometrical parameters of pumps impellers with models based on Computational Fluid Dynamics (CFD) simulations and optimization algorithms. Also, the actuality of the empirical models application in modern pump manufacturing industry is analyzed. Further, an empirical model for calculating the pump impeller geometrical parameters was presented. Applying this model, the calculation of the centrifugal pump impeller parameters for CH 6,3/20 1,1-2 canned motor pump was performed. The procedure for parameterization and generation of the geometric model based on parameters obtained from this model through ANSYS DesignModeler was also presented. CFD simulation based on ANSYS CFX was used to obtain the operating characteristic of the obtained centrifugal pump impeller. The authors carried out the comparison of the results of the designed model with the original one and with the optimized impeller obtained using optimization algorithms and CFD calculations.
Identification of tourism potential and 3A analysis (attraction, amenity, accessibility) in maitara village of akebay village
Authors: Majid Bahtiar , Taghulihi Betly
Published: February 2024

This research aims to identify tourism potential and analyze 3 A (attraction, accessibility and amenties) in Maitara Village of Akebay Village. It is hoped that from this research the government and the community of Maitara Kampung Akebay Village will get an overview and guidelines on tourism development in Akebay Village. Tourism development certainly requires attractions to be used as tourist attractions, easy access such as roads and transportation and additional supporting facilities such as lodging, restaurants, toilets, and so on which are called the 3 A terms.
From the results of field research there are several potentials that can be used as tourist attractions in Maitara Village, Akebay Village including, Nature Tourism, Culture and Fitness Tourism. The theory used is the theory of potential, tourist attraction and 3A.
The conclusion of this research is that there are several types of attractions that can be offered by Maitara Kampung Akebay Village as a tourist attraction, namely (1). Nature tourism consisting of Camping Ground, Tracking, (2) Cultural Tourism consists of "Bakerah" and traditional games, (3) Artificial Tourism consists of intagramable photo spots and swimming pools for children.
Workplace Conflict and Employees' Performance in Public Universities in Anambra State
Authors: A. C. Udeogu , C. U. Onyeizugbe
Published: February 2024

The continuous strike activity and the apparent discord between lecturers and other unions within the university system made it necessary for this study's main objective to investigate the connection between workplace conflict and employee performance at Anambra State's public universities. 3492 academic employees from the public universities that were chosen for the study made up the population, and the Krejcie and Morgan formula was used to determine the sample size, which came out to be 344. The data was collected using a standardized questionnaire that underwent reliability and validity testing. Simple regression analysis was used to examine the data, and tests of the hypotheses were done at the 5% significance level. The results showed that workplace conflict has a statistically significant and positive relationship with employees' performance in public universities in Anambra State, Nigeria, with (R =.989, R-Square =.978, F statistics = 13017.646, P-value.000 <.05). 98% of the variations in employees' performance are explained by workplace (interpersonal) conflict. Therefore, among others, it was recommended that the management of the universities need to go extra mile to find out lecturers that are having interpersonal issues in other to wade in and settle it and not just allowing the people involved to handle the issues themselves and there is need for a strong conflict resolution committee in various departments.
The role of Gut-Microbiome-Brain-axis in Alzheirmer's disease
Authors: Mendes Nóbrega Rocha Victor , Mendes Nóbrega Rocha Vinicius , Felipe Gomes Gabriel , Lara Galvão Stéfani , Paula Luiza Zatiti Monsanto de , Osório de Oliveira Maria Eduarda , De Oliveira Isabela , Aldir da Silva Luiz , Melo Freitas Victor Hugo , Sales Camilly Ramos , Stangherlin Luana , Santos Júlio César Claudino dos
Published: February 2024

Alzheimer's disease (AD) is a complex neurodegenerative disorder characterized by cognitive decline and progressive loss of memory. Recent research has unveiled a potential link between the gut microbiome and the pathogenesis of AD, giving rise to the concept of the gut-microbiome-brain axis. This narrative review synthesizes current literature to elucidate the intricate interplay between gut microbiota and the development of AD. We explore the bidirectional communication along the gut-brain axis and its impact on neuroinflammation, amyloid-beta accumulation, and tau hyperphosphorylation—key hallmarks of AD pathology. Additionally, we discuss the potential influence of gut dysbiosis on systemic inflammation and its contribution to the neuroinflammatory milieu observed in AD. The modulation of gut microbiota emerges as a promising avenue for therapeutic interventions in AD, with probiotics, prebiotics, and dietary strategies showing potential to positively impact cognitive outcomes. As we delve into the evolving landscape of the gut-microbiome-brain axis, this review provides a comprehensive overview of the current understanding and potential implications for targeting the gut microbiome to ameliorate Alzheimer's disease.
Acute Effect of Vertebral Manipulation Technique on the Autonomic Nervous System
Authors: Marques Ana Paula de Oliveira , Lima Carlos Eduardo Damasceno , Silva Lidiane Gomes da , Alves Lucivana de Sena , Lopes Junior José Evaldo Gonçalves , Vanderlei Edfranck de Sousa , Almeida e Neves Eduardo de
Published: February 2024

The term "stress" refers to the state induced by perceiving stimuli that trigger emotional and hormonal responses in the body's balance. In acute stress situations, adrenaline, neurotransmitters, and cortisol are released, causing systemic changes and physiological disruptions, keeping the body alert. Heart rate variability assesses the autonomic nervous system. Joint manipulation, involving high-speed, low-amplitude movements, was chosen based on the patient's dysfunction. The study aimed to assess the immediate effects of this technique on the sympathetic and parasympathetic systems, analyzing heart rate variability in university students in Fortaleza. This cross-sectional, randomized, quantitative study at the Ateneu University Center involved 20 participants divided into two groups: G1 – vertebral manipulation application and G2 – a control group with positioning only. Autonomic nervous system evaluation used a sensor connected to the earlobe and the Inner Balance app. Data was processed by Em Wave and Kubios software before and after manipulation. Range of motion was assessed using Kinovea software. Both groups experienced increased range of motion, with greater improvement in the manipulation group. Both groups showed increased parasympathetic activity and reduced sympathetic stress levels, possibly influenced by manipulation and touch, providing either nerve decompression or direct autonomic nervous system stimulation through touch.
Techno-Economic Analysis of Central Receiver Plants According to the Optical Error of the Solar Field
Authors: Les Iñigo , Mutuberria Amaia , Bernardos Ana , Sanchez Marcelino
Published: February 2024

Among the concentrated solar power technologies (CSP), the central receiver (CR) technology is the most promissing to achieve the lowest levelized cost of energy (LCOE) and the one expected to play one of the major roles in the energetic mix in the next years. For that purpose, succesful CR projects are needed, starting by the contruction and erection of a reliable heliostat field that fulfils its design specifications. In this work, the loss of energy production and the consequently rise of LCOE is investigated as function of the optical error of the heliostats. For that, a reference CR plant is defined in which the heliostat field layout and the receiver are optimized to collect the maximum annual energy. An aiming strategy is also implemented to obtain more realistic results. For instance, for a reasonable deviation of about 40-50% compared to the optical reference error, the annual collected energy can drop to a considerable 5%.
Modeling the Guaranteed Performance of CSP Plants
Authors: Price Hank , Rademeyer Gary
Published: February 2024

Performance models are an essential tool for the development, design optimization, and estimation of the expected performance or yield of concentrating solar power (“CSP”) plants. It has also become common practice to use performance models to calculate the guaranteed performance of CSP plants for evaluating whether a newly constructed CSP plant has met its performance obligations. Although this would seem to be an obvious approach, actual experience has shown that insufficient thought has gone into how this should be done, and the performance models used have generally not been up to the task. We discuss some of the issues in relation to defining the guaranteed performance of a CSP plant, using a performance model to determine the guaranteed performance, and issues related to assessing whether the plant has met its guaranteed performance. We provide recommendations for how future projects should address these issues.
ASSESSMENT OF DEVELOPMENT PROSPECTS THE SILVER ECONOMY IN ST. PETERSBURG: SOCIO-ECONOMIC ASPECTS
Authors:   Institute for Regional Economic Studies Russian Academy of Science, Shestakova N. N.
Published: February 2024

One of the global challenges of the last decades is demographic, which is the aging of the population. The latter is reflected in an increase in the proportion of the population of older age groups in the total population.
Non-disclosure of violence in Australian Indigenous communities
Authors: Willis Matthew
Published: February 2024

Violent crime statistics drawn from police data do not show the large amount of violent crime and victimisation that is never disclosed to police. Within this ‘dark figure of crime’ are human experiences that can leave victims without help and support, perpetrators not coming to justice and cycles of violence continuing unbroken. This paper explores some of the reasons for the high rates of non-disclosure of violence in Indigenous communities. It begins by examining reasons for non-disclosure in the broader Australian community before discussing how factors specific to Indigenous Australians influence individual decisions to disclose violence. As well as using Australian and international literature to build an understanding of why people choose not to disclose, the paper uses scenarios developed by the Australian Crime Commission from their work with Indigenous communities to illustrate the circumstances in which these choices are made. The paper concludes by considering ways of encouraging disclosure through services, training and education and community responses. It emphasises the need to locate these within broader efforts to address the cycles of intergenerational violence that can so heavily impact the lives of Indigenous Australians.