bluuebunny/crossref_metadata_2025 huggingface dataset:
O EMPREGO DE CALCULADORAS CIENTÍFICAS NO CONTEXTO DO ENSINO DE MATEMÁTICA, UMA REVISÃO SISTEMÁTICA
Authors: Almeida George Benvindo de , Rocha Creyton Borges , Castro André Francisco Coelho , Melo André Luiz Ferreira de Carvalho
Published: January 2024

O uso de tecnologias no processo educativo se apresenta como uma excelente opção por parte de educadores. Dentre as inúmeras possibilidades, merece destaque o uso direcionado de calculadoras científicas nas aulas de matemática. Dessa forma, este trabalho apresentou como objetivo geral: realizar uma revisão sistemática acerca do uso de calculadora científica no ensino de matemática. Metodologia: Foi realizada um estudo de Revisão de Literatura Especializado do tipo Revisão Sistemática, nos meses de agosto e setembro de 2023 por meio de consulta de artigos na base de dados Web of Science, utilizando-se descritores: Scientific calculator, Teaching Mathematics.  A pesquisa teve como critério de exclusão: Ser publicado anteriormente ao ano de 2013, teses, dissertações. Foram encontrados 43 artigos, sendo 29 aceitos no estudo pelos critérios de inclusão. As principais categorias WoS relacionadas aos estudos são Education Educational Research (27,6%) e Education Scientific Disciplines (27,6%). A pesquisa revelou que o Brasil não apresenta trabalhos internacionais envolvendo a temática, que tem como países destaque Malásia (27,6%) e Estados Unidos (27,6%). 55,2% dos trabalhos apresentados são artigos de revistas e apresentam como principal área Educação/Pesquisa Educacional (55,2%). Os resultados obtidos neste levantamento apontam para uma gama de possibilidades envolvendo pesquisas educacionais abordando o uso de calculadora científica em sala de aula.
Aerosol–meteorology feedback diminishes the transboundary transport of black carbon into the Tibetan Plateau
Authors: Hu Yuling , Yu Haipeng , Kang Shichang , Yang Junhua , Rai Mukesh , Yin Xiufeng , Chen Xintong , Chen Pengfei
Published: January 2024

Abstract. Black carbon (BC) exerts potential effects on climate, especially in the Tibetan Plateau (TP), where the cryosphere and environment are very sensitive to climate change. The TP saw a record-breaking aerosol pollution event during the period from 20 April to 10 May 2016. This paper investigates the meteorological causes of the severe aerosol pollution event, the transboundary transport flux of BC, the aerosol–meteorology feedback, and its effect on the transboundary transport flux of BC during the severe aerosol pollution event using observational and reanalysis datasets as well as simulation based on a coupled meteorology and aerosol/chemistry model, Weather Research and Forecasting model coupled with Chemistry (WRF-Chem). By analyzing weather maps derived from the reanalysis dataset, it is found that the plateau vortex and southerly winds were key factors that contributed to the severe aerosol pollution event. Subsequently, due to the good performance of the WRF-Chem model for the spatiotemporal characteristics of meteorological conditions and aerosols, the transboundary transport flux of BC during the pollution event was investigated. The results show that the vertically integrated cross-Himalayan transport flux of BC decreases from west to east, with the largest transport flux of 20.8 mg m−2 s−1 occurring at the deepest mountain valley in southwestern TP. Results from simulations with and without aerosol–meteorology feedback show that aerosols induce significant changes in meteorological conditions in the southern TP and the Indo-Gangetic Plain (IGP), with the atmospheric stratification being more stable and the planetary boundary layer height decreasing in both regions, and the 10 m wind speed increasing in the southern TP but decreasing in the IGP. Changes in meteorological conditions in turn lead to a decrease in the surface BC concentration in the southern TP of up to 0.16 µg m−3 (50 %) and an increase in the surface BC concentration in the IGP of up to 2.2 µg m−3 (75 %). In addition, it is found that the aerosol–meteorology feedback decreases the vertically integrated transboundary transport flux of BC from the central and western Himalayas towards the TP. This study not only provides crucial policy implications for mitigating glacier melt caused by aerosols over the TP but is also of great significance for the protection of the ecological environment of the TP.
Optimized design of flux chambers for measurement of ammonia emission after field application of slurry with full-scale farm machinery
Authors: Pedersen Johanna , Hafner Sasha D. , Pacholski Andreas , Karlsson Valthor I. , Rong Li , Labouriau Rodrigo , Kamp Jesper N.
Published: January 2024

Abstract. Field applied liquid animal manure (slurry) is a significant source of ammonia (NH3) emission, which is harmful to the environment and human health. To evaluate mitigation options, reliable measurements of effects are needed. A new system of dynamic flux chambers (DFC) with high time resolution online measurements was developed. The system was investigated in silico with computational fluid dynamics and tested in three field trials, each trial assessing the variability after application with trailing hose at different scales: manual (handheld), 3-m experimental slurry boom, and 30-m farm-scale commercial slurry boom. For the experiments with machine application, parallel NH3 emission measurements were made using an inverse dispersion modelling method (backward Lagrangian stochastic modelling, bLS). The lowest coefficient of variation of replicate DFC measurements was obtained with manual application, followed by the 3-m slurry boom, and lastly the 30-m slurry boom. Conditions in DFCs resulted in a consistently higher NH3 flux than what was measured with the inverse dispersion technique but both methods showed a similar emission reduction by injection compared to trailing hose: 89 % by DFC and 97 % by bLS. The new measurement system facilitates NH3 emission measurement with replication after both manual and farm-scale slurry application with relatively high precision, with a coefficient of variation of 5 % among replicates with manual slurry application and 20 % for farm-scale slurry application.
Measurement report: Characteristics of nitrogen-containing organics in PM2.5 in Urumqi, northwest China: differential impacts of combustion of fresh and old-age biomass materials
Authors: Ma Yi-Jia , Xu Yu , Yang Ting , Xiao Hong-Wei , Xiao Hua-Yun
Published: January 2024

Abstract. Nitrogen-containing organic compounds (NOCs) are abundant and important aerosol components, deeply involving in global nitrogen cycle. However, the sources and formation processes of NOCs remain largely unknown, particularly in the city (Urumqi, China) farthest from the ocean worldwide. Here, NOCs in PM2.5 collected in Urumqi over a one-year period were characterized by ultrahigh-resolution mass spectrometry. The abundance of CHON compounds (mainly poor-O unsaturated aliphatic-like species) in the positive ion mode was higher in the warm period than in the cold period, which was largely attributed to the contribution of fresh biomass material combustion (e.g., forest fires) associated with amidation of unsaturated fatty acids in the warm period, rather than the oxidation processes. However, CHON compounds (mainly nitro-aromatic species) in the negative ion mode increased significantly in the cold period, which was tightly related to old-age biomass combustion (e.g., dry straws) in wintertime Urumqi. For CHN compounds, we found that alkyl nitriles and aromatic CNH compounds showed higher abundance in the warm and cold periods, respectively. It further confirmed different impacts of the combustion of fresh- and old-age biomass materials on NOC compositions. Our results clarify the mechanisms by which fresh and old-age biomass materials emitted different NOCs.
Measurement report: The ice-nucleating activity of lichen sampled in a northern European boreal forest
Authors: Proske Ulrike , Adams Michael P. , Porter Grace C. E. , Holden Mark , Bäck Jaana , Murray Benjamin J.
Published: January 2024

Abstract. Ice nucleating particles (INPs) facilitate heterogeneous freezing of cloud droplets and thus modify cloud properties. Hence, it is important to understand the sources of INPs. During the HyICE-2018 campaign, which took place in the boreal forest of Hyytiälä, substantial concentrations of biological INPs were observed despite many potential biological sources of INPs being snow covered. A potential source of INP that were not covered in snow were lichens that grow on trees, hence we investigated these lichens as a potential source of biological INPs in this boreal forest environment. INPs derived from lichen sampled during HyICE-2018 are shown to nucleate ice at temperatures as warm as -5 °C in aqueous solutions extracted from 0.03 g ml-1 lichen. In particular, we identify two species of INPs active at -16 and -18 °C and smaller than 2 µm in size, which makes them good candidates for atmospheric INPs. These particles are smaller than whole lichen spores. In species specific tests we show that the four investigated lichen species harbour differently sized INPs, which might suggest that some species of lichen are more important as a source of INPs than others. This study shows that lichen from a European Boreal forest harbour INPs, which may be especially important in habitats where few other biological INP sources are present, such as in a snow covered environment. The great terrestrial abundance of lichen INPs calls for further research to combine their ice nucleating ability with dispersal studies to evaluate the flux of lichenous INPs into the atmosphere as well as to what extent these particles reach heights and locations where they might influence cloud properties.
Satellite Observations Reveal Northern California Wildfire Aerosols Reduce Cloud Cover in California and Nevada Through Semi-Direct Effects
Authors: Gomez James L. , Allen Robert J. , Li King-Fai
Published: January 2024

Abstract. Wildfires in the southwestern United States, particularly in northern California (nCA), have grown in size and severity in the past decade. As they have grown larger, they have been associated with large emissions of absorbing aerosols in to the troposphere. Utilizing satellite observations from MODIS, CERES, AIRS, and CALIPSO, the meteorological effects of aerosols associated with fires during the wildfire season (June–October) were discerned over the nCA-NV (northern California and Nevada) region in the 2003–2022 time frame. As higher temperatures and low relative humidity RH dominate during high surface pressure ps atmospheric conditions, the effects of the aerosols on high (90th percentile) fire days compared to low fire (10th percentile) days were stratified based on whether ps was anomalously high or anomalously low (10th percentile). An increase in tropospheric temperatures was found to be concurrent with more absorbing aerosol aloft, which is associated with significant reductions in tropospheric RH during both 90th and 10th percentile ps conditions. Furthermore, high fire days under low ps conditions are associated with reduced cloud fraction CF, which is consistent with the traditionally-defined aerosol- cloud semi-direct effect. The reduced CF, in turn, is associated with reduced T OA SW radiative flux, a warmer surface, and less precipitation. These changes could create a positive feedback that could intensify fire weather, and therefore extend fire lifetime and impacts.
A novel, balloon-borne UV/visible spectrometer for direct sun measurements of stratospheric bromine
Authors: Voss Karolin , Holzbeck Philip , Pfeilsticker Klaus , Kleinschek Ralph , Wetzel Gerald , Fuentes Andrade Blanca , Höpfner Michael , Ungermann Jörn , Sinnhuber Björn-Martin , Butz André
Published: January 2024

Abstract. We report on a novel, medium weight (∼ 25 kg) optical spectrometer coupled to an automated sun tracker (∼ 12 kg) for direct sun observations from azimuth controlled balloon platforms. It is designed to measure a suite of UV/vis absorbing gases (O3, NO2, BrO, OClO, HONO and IO) relevant in the context of stratospheric ozone depletion using the DOAS method. Here, we describe the design and major features of the instrument. Further, the instrument’s performance during two stratospheric deployments from Esrange/Kiruna (Sweden) on 21 August 2021 and from Timmins (Ontario, Canada) on 23 August 2022 are discussed along with first results concerning inferred mixing ratios of BrO above balloon float altitude. Using a photochemical correction for the partitioning of stratospheric bromine ([BrO]/[Bry]) obtained by chemical transport simulations, the inferred total stratospheric bromine load [Bry] amounts to (17.5 ± 2.2) ppt (pure statistical error amounts to 1.5 ppt) in (5.5±1.0) yrs old air, resulting in a stratospheric entry early 2017±1 yr, the latter being inferred from simultaneous measurements of N2O by the GLORIA mid-IR instrument.
Divergent responses of evergreen needle-leaf forests in Europe to the 2020 warm winter
Authors: Gharun Mana , Shekhar Ankit , Hörtnagl Lukas , Krebs Luana , Arriga Nicola , Migliavacca Mirco , Roland Marilyn , Gielen Bert , Montagnani Leonardo , Tomelleri Enrico , Šigut Ladislav , Peichl Matthias , Zhao Peng , Schmidt Marius , Grünwald Thomas , Korkiakoski Mika , Lohila Annalea , Buchmann Nina
Published: January 2024

Abstract. Relative to drought and heat waves, the effect of winter warming on forest CO2 fluxes during the dormant season has less been investigated, despite its relevance for net CO2 uptake in colder regions with higher carbon content in soils. Our objective was to test the effect of the exceptionally warm winter in 2020 on the winter CO2 budget of cold-adapted evergreen needle-leaf forests across Europe, and identify the contribution of soil and air temperature to changes in winter CO2 fluxes in response to warming. Our hypothesis was that warming in winter leads to higher emissions across colder sites due to increased ecosystem respiration. To test this hypothesis, we used 98 site-year eddy covariance measurements across 14 evergreen needle-leaf forests (ENFs) distributed from north to south of Europe (from Sweden to Italy). We used a data-driven approach to quantify the effect of air and soil temperature on changes in net ecosystem productivity (NEP) during the warm winter of 2020. Our results showed that the impact of warming was different across sites, as in the lower altitude and lower latitude sites positive soil temperature anomalies were larger, while positive air temperature anomalies were larger in the northern latitude and high-altitude sites. Warming in winter led to a divergent response across the sites. Out of 14 sites only in 3 sites net ecosystem productivity declined in winter significantly in response to warming. In addition, we observed that in the colder sites daytime NEP (that is dominated by photosynthesis) declined with warming of the air in winter, whereas in the warmer sites daytime NEP increased with warming of the soil. This shows that warming of the air – if not translated into a direct warming of the soil– might not trigger productivity in winter if the soil within the rooting zone remains frozen. Forests within the same plant functional type category can exhibit differing reactions to winter warming and to predict their responses accurately it is crucial to account for variations in local climate, physiology, and structure simultaneously.
A new airborne system for simultaneous high-resolution ocean vector current and wind mapping: first demonstration of the SeaSTAR mission concept in the macrotidal Iroise Sea
Authors: McCann David Lewis , Martin Adrien C. H. , Macedo Karlus , Carrasco Alvarez Ruben , Horstmann Jochen , Marié Louis , Márquez-Martínez José , Portabella Marcos , Meta Adriano , Gommenginger Christine , Martin-Iglesias Petronilo , Casal Tania
Published: January 2024

Abstract. Coastal seas, shelf seas and marginal ice zones are dominated by small-scale ocean surface dynamic processes that play a vital role in the transport and exchange of climate-relevant properties like carbon, heat, water and nutrients between land, ocean, ice and atmosphere. Mounting evidence indicates that ocean scales below 10 km have far-ranging impacts on air-sea interactions, lateral ocean dispersion, vertical stratification, ocean carbon cycling, and marine productivity – governing exchanges across key interfaces of the Earth System, the global ocean and atmosphere circulation and climate. Yet, these processes remain poorly observed at the fine spatial and temporal scales necessary to resolve them. Ocean Surface Current Airborne Radar (OSCAR) is a new airborne instrument with the capacity to inform these questions by mapping vectorial fields of total ocean surface currents and winds at high resolution over a wide swath. Developed for the European Space Agency (ESA), OSCAR is the airborne demonstrator of the satellite mission concept ‘SeaSTAR’, which aims to map total surface current and ocean wind vectors with unprecedented accuracy, spatial resolution and temporal revisit across all coastal seas, shelf seas and marginal ice zones. Like SeaSTAR, OSCAR is an active microwave Synthetic Aperture Radar Along-Track Interferometer (SAR-ATI) with optimal three-azimuth sensing enabled by unique highly-squinted beams. In May 2022, OSCAR was flown over the Iroise Sea, France, in its first scientific campaign as part of the ESA-funded SEASTARex project. The campaign successfully demonstrated the capabilities of OSCAR to produce high-resolution 2D images of total surface current vectors and near-surface ocean vector winds, simultaneously, in a highly dynamic, macrotidal coastal environment. OSCAR current and wind vectors show excellent agreement against ground-based X-band radar derived surface currents, numerical model outputs and NovaSAR-1 satellite SAR imagery, with Root-Mean-Square differences against X-band radar better than 0.2 m s-1 for currents at 200 m resolution. These results are the first demonstration of simultaneous retrieval of total current and wind vectors from a high-squint three-look SAR-ATI instrument, and the first geophysical validation of the OSCAR and SeaSTAR observing principle. OSCAR presents a remarkable new ocean observing capability to support the study of small-scale ocean dynamics and air-sea interactions across the Earth’s coastal, shelf and polar.
The 2020 European Seismic Hazard Model: Overview and Results
Authors: Danciu Laurentiu , Giardini Domenico , Weatherill Graeme , Basili Roberto , Nandan Shyam , Rovida Andrea , Beauval Céline , Bard Pierre-Yves , Pagani Marco , Reyes Celso Guillermo , Sesetyan Karin , Vilanova Susana , Cotton Fabrice , Wiemer Stefan
Published: January 2024

Abstract. The 2020 update of the European Seismic Hazard Model (ESHM20) is the most recent and up-to-date assessment of seismic hazard for the Euro-Mediterranean region. The new model, publicly released in May 2022, incorporates refined and cross-border harmonised earthquake catalogues, homogeneous tectonic zonation, updated active faults datasets and geological information, complex subduction sources, updated area source models, a smoothed seismicity model with an adaptive kernel optimised within each tectonic region and a novel ground motion characteristic model. ESHM20 supersedes the 2013 European Seismic Hazard Model (ESHM13, Wössner et al 2015) and provides full sets of hazard outputs such as hazard curves, maps, and uniform hazard spectra for the Euro-Mediterranean region. The model provides two informative hazard maps that will serve as a reference for the forthcoming revision of the European Seismic Design Code (CEN EC8) and provides input to the first earthquake risk model for Europe (Crowley et al., 2021). ESHM20 will continue to evolve and act as a key resource for supporting earthquake preparedness and resilience throughout Euro-Mediterranean region under the umbrella of the European Facilities for Seismic Hazard and Risk Consortium (EFEHR Consortium).
Investigation of satellite vertical sensitivity on long-term retrieved lower tropospheric ozone trends
Authors: Pope Richard J. , O'Connor Fiona M. , Dalvi Mohit , Kerridge Brian J. , Siddans Richard , Latter Barry G. , Barret Brice , Le Flochmoen Eric , Boynard Anne , Chipperfield Martyn P. , Feng Wuhu , Pimlott Matilda A. , Dhomse Sandip S. , Retscher Christian , Wespes Catherine , Rigby Richard
Published: January 2024

Abstract. Ozone is a potent air pollutant in the lower troposphere and an important short-lived climate forcer (SLCF) in the upper troposphere. Studies investigating long-term trends in tropospheric column ozone (TCO3) have shown large-scale spatiotemporal inconsistencies. Here, we investigate the long-term trends in lower tropospheric column ozone (LTCO3, surface-450 hPa sub-column) by exploiting a synergy of satellite and ozonesonde datasets and an Earth System Model (UKESM) over North America, Europe and East Asia for the decade 2008–2017. Overall, we typically find small LTCO3 linear trends with large uncertainty ranges from the Ozone Monitoring Instrument (OMI) and the Infrared Atmospheric Sounding Interferometer (IASI), while model simulations indicate a stable LTCO3 tendency. Trends in the satellite a priori datasets show negligible trends indicating year-to-year sampling is not an issue. The application of the satellite averaging kernels (AKs) to the UKESM ozone profiles, accounting for the satellite vertical sensitivity and allowing for like-for-like comparisons, has a limited impact on the modelled LTCO3 tendency in most cases. While, in relative terms, this is more substantial (e.g. in the order of 100 %), the absolute magnitudes of the model trends show negligible change. However, as the model has a near-zero tendency, artificial trends were imposed on the model time-series (i.e. LTCO3 values rearranged from smallest to largest) to test the influence of the AKs but simulated LTCO3 trends remained small. Therefore, the LTCO3 tendency between 2008 and 2017 in northern hemispheric regions are likely small, with large uncertainties, and it is difficult to detect any small underlying linear trends due to inter-annual variability or other factors which require further investigation.
Sensor-independent LAI/FPAR CDR: reconstructing a global sensor-independent climate data record of MODIS and VIIRS LAI/FPAR from 2000 to 2022
Authors: Pu Jiabin , Yan Kai , Roy Samapriya , Zhu Zaichun , Rautiainen Miina , Knyazikhin Yuri , Myneni Ranga B.
Published: January 2024

Abstract. Leaf area index (LAI) and fraction of photosynthetically active radiation (FPAR) are critical biophysical parameters for the characterization of terrestrial ecosystems. Long-term global LAI/FPAR products, such as the moderate resolution imaging spectroradiometer (MODIS) and the Visible Infrared Imaging Radiometer Suite (VIIRS), provide the fundamental dataset for accessing vegetation dynamics and studying climate change. However, existing global LAI/FPAR products suffer from several limitations, including spatial–temporal inconsistencies and accuracy issues. Considering these limitations, this study develops a sensor-independent (SI) LAI/FPAR climate data record (CDR) based on Terra-MODIS/Aqua-MODIS/VIIRS LAI/FPAR standard products. The SI LAI/FPAR CDR covers the period from 2000 to 2022, at spatial resolutions of 500 m/5 km/0.05∘, 8 d/bimonthly temporal frequencies and available in sinusoidal and WGS1984 projections. The methodology includes (i) comprehensive analyses of sensor-specific quality assessment variables to select high-quality retrievals, (ii) application of the spatial–temporal tensor (ST-tensor) completion model to extrapolate LAI and FPAR beyond areas with high-quality retrievals, (iii) generation of SI LAI/FPAR CDR in various projections and various spatial and temporal resolutions, and (iv) evaluation of the CDR by direct comparisons with ground data and indirectly through reproducing results of LAI/FPAR trends documented in the literature. This paper provides a comprehensive analysis of each step involved in the generation of the SI LAI/FPAR CDR, as well as evaluation of the ST-tensor completion model. Comparisons of SI LAI (FPAR) CDR with ground truth data suggest an RMSE of 0.84 LAI (0.15 FPAR) units with R2 of 0.72 (0.79), which outperform the standard Terra/Aqua/VIIRS LAI (FPAR) products. The SI LAI/FPAR CDR is characterized by a low time series stability (TSS) value, suggesting a more stable and less noisy dataset than sensor-dependent counterparts. Furthermore, the mean absolute error (MAE) of the CDR is also lower, suggesting that SI LAI/FPAR CDR is comparable in accuracy to high-quality retrievals. LAI/FPAR trend analyses based on the SI LAI/FPAR CDR agree with previous studies, which indirectly provides enhanced capabilities to utilize this CDR for studying vegetation dynamics and climate change. Overall, the integration of multiple satellite data sources and the use of advanced gap filling modeling techniques improve the accuracy of the SI LAI/FPAR CDR, ensuring the reliability of long-term vegetation studies, global carbon cycle modeling, and land policy development for informed decision-making and sustainable environmental management. The SI LAI/FPAR CDR is open access and available under a Creative Commons Attribution 4.0 License at https://doi.org/10.5281/zenodo.8076540 (Pu et al., 2023a).
Improving subseasonal forecast skill in the Norwegian Climate Prediction Model using soil moisture data assimilation
Authors: Nair Akhilesh Sivaraman , Counillon François , Keenlyside Noel
Published: January 2024

Abstract. This study emphasises the importance of soil moisture (SM) in subseasonal-to-seasonal (S2S) predictions at midlatitudes. To address this we introduce the Norwegian Climate Prediction Model Land (NorCPM-Land), a land reanalysis framework tailored for integration with the Norwegian Climate Prediction Model (NorCPM). NorCPM-Land assimilates blended SM data from the European Space Agency’s Climate Change Initiative into a 30-member offline simulation of the Community Land Model with fluxes from the coupled model. The assimilation of SM data reduces error in SM by 10.5 % when validated against independent SM observations. It also improves latent heat flux estimates, illustrating that the adjustment of underlying SM significantly augments the capacity to model land surface dynamics. We evaluate the added value of land initialisation for subseasonal predictions, by comparing the performance of hindcasts (retrospective prediction) using the standard NorCPM with a version where the land initial condition is taken from NorCPM-Land reanalysis. The hindcast covers the period 2000 to 2019 with four start dates per year. Land initialisation improves predictions up to a 3.5-month lead time for SM and a 1.5-month lead time for temperature and precipitation. The largest improvements are observed in regions with significant land-atmospheric coupling, such as the Central United States, the Sahel, and Central India. It also better captures extreme (high and low) temperature events in parts of Europe, the United States, and Asia, at mid and high latitudes. Overall, our study provides further evidence for the significant role of SM content in enhancing the accuracy of subseasonal predictions. This study provides an technique for improved land initialisation, utilising the same model employed in climate predictions.
Impact of atmospheric rivers on Arctic sea ice variations
Authors: Li Linghan , Cannon Forest , Mazloff Matthew R. , Subramanian Aneesh C. , Wilson Anna M. , Ralph Fred Martin
Published: January 2024

Abstract. Arctic sea ice has been declining rapidly in recent decades. We investigate how the poleward transport of moisture and heat from lower latitudes through atmospheric rivers (ARs) influences Arctic sea ice variations. We use hourly ERA5 (fifth-generation European Reanalysis) data for 1981–2020 at 0.25∘ × 0.25∘ resolution to examine the meteorological conditions and sea ice changes associated with ARs in the Arctic. In the years 2012 and 2020, which had an extremely low summer Arctic sea ice extent, we show that the individual AR events associated with large cyclones initiate a rapid sea ice decrease through turbulent heat fluxes and winds. We carry out further statistical analysis of the meteorological conditions and sea ice variations for 1981–2020 over the entire Arctic Ocean. We find that on weather timescales the atmospheric moisture content anticorrelates significantly with the sea ice concentration tendency almost everywhere in the Arctic Ocean, while the dynamic sea ice motion driven by northward winds further reduces the sea ice concentration.
PENGARUH POLA ASUH ORANG TUA TERHADAP PERILAKU SOSIAL ANAK USIA DINI DI TK ABA
Authors: Yuris Evicenna , Raniyah Qaulan , Rahimah Rahimah
Published: January 2024

Penelitian ini bertujuan untuk mengetahui pengaruh pola asuh orang tua terhadap perilaku sosial anak usia dini yang bersekolah di TK ABA 21 dan TK ABA 07 Kota Medan. Masalah di fokuskan pada pentingnya pendidikan parenting khususnya materi tentang pola asuh yang ideal. Guna mendekati masalah ini dipergunakan acuan teori dari Baron dan Byrne (Habel, 2015) tentang perilaku sosial dan Hurlock (1999) tentang pola asuh orang tua. Data-data dikumpulkan melalui sampel penelitian sebanyak 50 orang tua siswa dari kedua TK dengan menggunakan instrumen berupa skala pola asuh orang tua dan skala perilaku sosial anak usia dini dan dianalisis secara kuantitatif. Kajian ini menyimpulkan bahwa terdapat pengaruh pola asuh orang tua terhadap perilaku sosial anak usia dini dengan nilai R square sebesar 0.464, dengan nilai tersebut berarti sebesar 46.4% bervariasinya perilaku sosial anak usia dini dipengaruhi oleh pola asuh orang tua. Sedangkan sisanya sebesar 52.5% dipengaruhi oleh variabel lainnya di luar penelitian ini. Pola asuh demokratis orang tua memiliki pengaruh positif dan signifikan terhadap perilaku sosial anak usia dini. Sedangkan pola asuh otoriter secara positif mempengaruhi perilaku sosial anak usia dini tetapi tidak signifikan secara statistik, pola asuh permisif secara negatif mempengaruhi perilaku sosial anak usia dini dan signifikan secara statistik.
Eğitim Yöneticilerinin İletişim Becerileriyle İlgili Alanyazın Araştırmalarının İncelenmesi
Authors: Beşli Paşali
Published: January 2024

Communication is classified as oral, written and receptive communication, as well as generalized, interpersonal, intergroup, person-group, situational and pathological communication can also be Decoupled Decoupled. Verbal communication, which is one of the types of interpersonal communication, is the type of communication that is usually used. The definition is made in the form of individuals making various sounds and transmitting their feelings and ideas to the other side. Face-to-face conversations of individuals, songs, expressing lessons or fairy tales, etc. verbal communication is in the examples. Oral communication provides time for individuals who communicate because it allows for questions and answers during face-to-face conversation, it allows for the perception of issues that do not perceive and the ability to return immediately. The first type of interpersonal communication is nonverbal communication, which is carried out by making gestures and facial expressions, and therefore using body language. When the types of communication have been investigated throughout history, it has been understood that nonverbal communication has been used primarily. Messages of this type are transmitted by using gestures and gestures. Feelings and ideas that words are not enough to express are easily and clearly conveyed through the use of body language. An occasional contact, hug or kiss can have more of an impact than Decrees. Nonverbal communication is usually more effective on the recipient than verbal communication. The last one of the interpersonal communication situations is the written form of communication. The acquisition of feelings and ideas into a concrete form with various types of symbols is called written communication. Written communication has been carried out from the discovery of writing to the present day. Written communication is mainly used in educational institutions. Forms of corporate correspondence, guidelines, journals, communiqués, newsletters, authorized board decisions, letters, registration reports, prescriptions, petitions can be cited as examples. Key Words: Educational Management, Educational Managers, Communication Skills, Literature Research
Utilization Of Geographic Information Systems (SIG) In Mapping Rivers As Alternative Transportation Routes In Jakarta
Authors: Khairuman Endi , Aritonang Sovian , Sjamsoeddin Sjafrie , Bagdja Ade
Published: January 2024

Abstract—Public transportation is an important means of transportation for people's lives. The importance of transportation is reflected in the increasing need for transportation services to move people and goods from one place to another. For this reason, there needs to be a way to be able to overcome congestion that occurs due to heavy traffic activities that occur on land. One way is to use the river as an alternative means of transportation. River currents can be used as a means of transportation by using watercraft such as amphibious buses. Therefore, river mapping studies are needed to study optimal routes so as to integrate amphibious bus transportation routes. The way that can be done is by maximizing the use of geographic information systems (GIS) for making mapping of the river path, so it is hoped that with the existence of water transportation routes, it can be a good solution to reduce the level of congestion that occurs in DKI Jakarta.
Analysis Of Beef Cattle Agribusiness In Deli Serdang Regency
Authors: Siregar Cindy Ainunnisa , Tafsin Ma'ruf , Kesuma Sinar Indra , Lubis Arga
Published: January 2024

This study aims to analyze the effect of each agribusiness subsystem on the income of beef cattle breeders in Deli Serdang Regency. The research was conducted in 3 (three) sub-districts in Deli Serdang, Hamparan Perak, Sinembah Tanjung Muda Hilir and Kutalimbaru Regencies using a simple random sample selection method. The total sample in this study were 75 breeders. Data were analyzed by scoring and path analysis. The results of the path analysis show that the agribusiness subsystem that has the most influence on the income of beef cattle breeders is the livestock farming subsystem of 0.466. The direct effect of the livestock farming subsystem on income is greater than the entire agribusiness subsystem studied. If the farmer wants to increase the income of beef cattle, then an increase is made in the livestock farming subsystem. The influence of the agribusiness subsystem on the income of beef cattle farmers through the marketing subsystem shows no effect. The influence of the agribusiness subsystem on the income of beef cattle breeders through the supporting subsystem shows that there is an influence on the income of beef cattle breeders, namely in the livestock farming subsystem of 0.821.
Contribution A L’étude D’élaboration D’acier A Carbone A Madagascar
Authors: RAZANAMAHAZO Richard Michel , RANDRIANIRAINY Huchard Paul Berthin , ANDRIANAIVORAVELONA Jaconnet Oliva
Published: January 2024

A l’origine de sa création, c’est la recherche appliquée pour le développement qui justifie l’existence d’un organisme de recherche publique. La présente étude est une tentative de contribution à la production d’acier à Madagascar. Elle se propose une méthode qui permet de convertir les déchets métalliques en acier. Le but du travail est de valoriser les produits réfractaires siliceux du CNRIT pour le garnissage d’un petit convertisseur. Le mode d’injection par le coté latéral du convertisseur à l’aide d’une tuyère à multiple trous a permis de faire circuler un grand débit d’oxygène et d’améliorer l’oxydation des impuretés dans la fonte. Par rapport au mode de soufflage par le haut, l’injection par le coté latéral réduit la teneur en azote dans le métal. En outre, une circulation uniforme de l’oxygène sur le liquide favorise la coalescence et la remontée donc l’assimilation des particules non métalliques dans le métal par la scorie. Mais la faible capacité du four entraîne un fort accroissement de sa surface spécifique. Il y a donc une grande perte de chaleur par unité de métal.
Implementation Of Special Autonomy Policy In Papua Province
Authors: Abu Rusdianto , Suradinata Ermaya , Sahyana Yana , Achmad Mansyur
Published: January 2024

Abstract – The phenomenon that is used as the object of research is the implementation of the special autonomy policy in Papua Province on increasing the Human Development Index (IPM) in Papua Province. The research objectives are (1) to analyze the implementation of the special autonomy policy in increasing HDI; (2) Analyze the obstacles to the implementation of the special autonomy policy in increasing the HDI; (3) Formulate a strategy for implementing special autonomy policies in increasing the HDI.          Utilizing a qualitative approach, this study gathered data from four informants identified via the snowball technique, with additional information obtained from literature and direct observation. The collected data was then analyzed descriptively, refined through observer triangulation.         This study explores the implementation of the special autonomy policy in Papua Province and its less than optimal impact on the Human Development Index (HDI). Key impediments include policy limitations in meeting stakeholders' interests, the types and extent of benefits conferred, change rate, decision-making, execution, and resource commitment. Further challenges arise from a weak anticipation of stakeholders' strengths, interests, strategies, institutional characteristics, compliance, and responsiveness. Given these constraints, current implementation has not effectively improved Papua's HDI as suggested by persistently low index scores.           Obstacles to the implementation of the special autonomy policy in Papua Province on increasing HDI include structural constraints, cultural constraints and conditional constraints.           The Special Autonomy ASOCA Strategy Model is a strategic approach derived from examining the special autonomy policy's impact on Papua Province's HDI
Contamination Des Laits Importes Au Mali Par La Melamine
Authors: A TRAORE , H TOURE , A BARRY , A BARRY , D DIARRA , G KANOUTE , B DIARRA
Published: January 2024

Au Mali l’insuffisance de données scientifiques sur la contamination des aliments en général et du lait en particulier par la Mélamine a motivé la conduite de la présente étude.Dans ce travail, nous avions recherchés la Mélamine dans les laits importés au Mali.Un total de 150 échantillons de laits importés, a été récolté dans le District de Bamako.La détermination de la Mélamine a été effectuée par Immuno-affinité/Méthode ELISA. Les résultats des analyses ont montré que 38 échantillons sur les 150 de laits importés étaient contaminés par la Mélamine. Chez les importateurs, 8 échantillons sur 18 des laits importés étaient contaminés, les taux de contamination variaient de 0,03mg/kg à 0,91 mg/kg. Chez les demi-grossistes 19 échantillons sur 66 des laits importés, étaient contaminés par la Mélamine. Les taux de contamination variaient de 0,01 à 1,14mg/kg. Chez les détaillants, 11 échantillons sur 66 des laits importés étaient contaminés avec des taux de contamination qui variaient de 0,01 à 1,00mg/kg. Les taux moyens de contamination des laits pour les importateurs, les demi-grossistes et les détaillants sont respectivement de (0,20 ; 0,26 ; 0,26) mg/kg. Il est a noté que les taux obtenus sont inférieurs à la norme du Codex Alimentarius qui fixe la limite maximale pour le lait et les aliments contenant le lait à 2,5mg/kg.
Contamination Des Laits Importes Au Mali Par Les Radionucléides
Authors: A TRAORE , H TOURE , A BARRY , D DIARRA , G KANOUTE , B DIARRA
Published: January 2024

Au Mali l’insuffisance de données scientifiques sur la contamination des aliments en général et du lait en particulier par les radionucléides a motivé la conduite de la présente étude.Dans ce travail, nous avions recherchés les radionucléides (134Cs, 137Cs, 90Sr) dans les laits importés au Mali.Un total de 150 échantillons de laits (18 chez les importateurs, 66 chez les vendeurs demi-grossistes, 66 échantillons chez les détaillants) a été récolté dans le District de Bamako.La détermination du 90Sr a été effectuée par le Compteur à gaz proportionnel selon la norme NF EN ISO 13160.La détermination des Césiums (134Cs, 137Cs) a été effectuée par Spectrométrie Gamma selon la norme NF ISO 10703.Les analyses des 150 échantillons des laits importés, n’ont détecté aucune trace des césiums (134Cs, 137Cs) et du Strontium (90Sr). Tous les résultats obtenus sont conformes aux normes du Codex Alimentarius.
The Transformation Matrices of vec A to vec A^T for Diagonal Matrix
Authors: Ahmad Rusdi , Yanita Yanita , Yulianti Lyra
Published: January 2024

This study aims to discusses the transformation matrices of vec A to vec A^T for diagonal matrix. The matrix used is a 4 x 4 diagonal matrix assuming that two pairs of elements are located on the main diagonal with the same value. To get the transformation matrices, this uses the commutation matrix equation is  K_mn  vec(A)=vec(A^T ). Therefore, several K_mn commutation matrices are obtained on a 4 x 4 diagonal matrix.
Selection of Exemplary Students Using The Concept of Hesitant Multi-Fuzzy Soft Set
Authors: Hendri Meutia Ivana , Nazra Admi , Arnawa I Made
Published: January 2024

The concept of hesitant multi-fuzzy soft set is a concept that can be applied in decision-making problems. In this paper, we use an algorithm with respect to hesitant multi-fuzzy soft set to make the selection of exemplary students. The decision-making process in this case is carried out by following the steps in a constructed algorithm in order to obtain the best possible outcome from the given case study.
Que humano é esse das humanidades digitais?
Authors: Mendes Faustino Deivison , Lippold Walter
Published: January 2024

Neste artigo propomos um diálogo entre as teorias antirracistas e o campo das humanidades digitais, fundamentado no pensamento de Frantz Fanon e nas produções teóricas do hacktivismo. Abordamos algumas possibilidades da história em uma sociedade digitalizada, mas também as contradições que se manifestam no fenômeno. As relações entre capitalismo, colonialismo e racismo são fundamentais para as pesquisas calcadas nas humanidades digitais. Embora o colonialismo, em Fanon, seja, antes de mais nada, uma forma particular de exploração econômica, a sua reprodução seria inviável sem o recurso a formas particulares de dominação e soberania onde os quais o racismo se apresenta como elemento fundamental. No artigo, partindo do método fanoniano da sociogênia, buscamos articular esses saberes com o campo das humanidades e história digital. No entanto, a natureza e a profundidade das violências que acompanharam o advento da modernidade e mesmo do humanismo ocidental, mas também a sua crítica nos permitem levantar as seguintes perguntas: que humano é esse das humanidades digitais? Quais possibilidades de contribuição teórica para a História emergem do entrecruzamento entre a crítica hacker-fanoniana e as humanidades digitais? O colonialismo está plasmado na teoria da história, sob a égide da ideologia do eurocentrismo, ocultando produções teóricas africanas e afrodiaspóricas, desdenhando das ferramentas intelectuais, métodos e conceitos cruciais para a compreensão de nossa sociedade. Assim como na cibercultura, o colonialismo digital projeta a ideologia californiana com a reabilitação do fardo do homem branco, agora reelaborado sob a égide do fardo do nerd branco. Aqui se projeta o horizonte dos Estudos Hacker-Fanonianos, o uso das tecnologias digitais na pesquisa e docência, deve acompanhar a compreensão de que modo eles são possíveis, quais relações de produção ocultam, como se realizam.
Value of Ultrasound Diagnostics in Predicting Ischemic Stroke Outcomes after Different Reperfusion Therapies
Authors: Hadisova A. G. , Zakhmatova T. V.
Published: January 2024

Acute ischemic stroke (AIS) is associated with high mortality, disability and economic expenses. Despite significant progress in the treatment of AIS using endovascular methods, it is not always possible to obtain good results. In the current literature, a small number of studies are devoted to predicting outcomes in patients with AIS who received various types of treatment.

This prospective cohort study included 460 patients who underwent thrombolytic therapy, thromboextraction, combination of thromboextraction with stenting or thrombolytic therapy.

The relationship between clinical and functional results at the early stages after intervention was assessed with potential predictors, among which the ultrasonic characteristics of extra- and intracranial arteries were analyzed.

Complete or partial reperfusion was obtained in 61,7 % of the examined patients. A higher efficiency of endovascular methods compared to thrombolytic therapy was noted (99,5 % vs 33,5 % respectively). The baseline NIHSS and Rankin scores did not show a high predictive valuey for early outcomes, that caused the necessary for searching instrumental predictors. Patients with significant stenosis of the internal carotid artery or vertebral artery had significantly worse clinical and functional outcomes, including the mRS scale. The proportion of poor early outcomes in patients with significant stenosis was significantly lower in the endovascular treatment groups compared to the thrombolytic therapy group. Multiple regression analysis showed that the outcome of AIS is influenced by the level of cerebral arterial involvement as well as lesion size with a threshold value of more than 2 cm.
The Possibilities of Standard Radiography with the Use Processing Radiographic Images and Multisection Computed Tomography when Planning a Reverse Total Shoulder Arthroplasty
Authors: Koshelev P. O. , Egorova E. A. , Diachkova G. V. , Diachkov K. A.
Published: January 2024

The aim of the study was to compare the informative value of standard radiography of the shoulder joint using computer processing software with the capabilities of multislice computed tomography (MSCT) before surgery in the volume of reverse total shoulder arthroplasty. The radiographs of shoulder joints in standard projections and computed tomograms of 30 patients who were observed with the consequences of shoulder joint injuries before surgery in the volume of reverse total shoulder arthroplasty. It is clearly shown that the use of specialized software provides additional information when choosing the size of the shoulder component of the endoprosthesis, allows for virtual restoration of the anatomy of the proximal humerus with severe post-traumatic deformation and limited mobility of the shoulder joint. However, during the program processing of X-ray images of the shoulder joint, no additional information was obtained when evaluating the geometric parameters of the shoulder blade glenoid. The data on the geometric characteristics of the glenoid, established using specialized software, were comparable with the results of image processing carried out in manual mode. Reliable characteristics, most important for preoperative planning of the positioning of the glenoid component of the endoprosthesis, could be obtained only by the results of MSCT.
New Coronavirus Pneumonia COVID-19 in Patients with Newly Diagnosed Tuberculosis on the Background of HIV Infection (Case Report)
Authors: Parakhin D. A. , Belova I. B. , Khoroshutina V. V.
Published: January 2024

The article discusses the issues of radiation diagnosis of coronavirus pneumonia COVID-19 in patients with newly diagnosed tuberculosis against the background of HIV infection using the example of the clinical case of 50-year-old patient who treated with respiratory complaints and fever, who had pronounced changes in the lungs according to radiological methods. The diagnosis of coronavirus infection, tuberculosis and HIV infection was confirmed morphologically. The course of newly diagnosed TB in a patient with HIV infection was complicated by severe bilateral viral pneumonia. A feature of this case was the atypical localization and unusual manifestation of tuberculous changes on the background of HIV infection according to multispiral computed tomography, as well as a long relapsing course of viral pneumonia, with long-term persistence of the SARS-CоV-2 coronavirus.