bluuebunny/crossref_metadata_2025 huggingface dataset:
Meltwater runoff and glacier mass balance in the high Arctic: 1991–2022 simulations for Svalbard
Authors: Steffensen Schmidt Louise , Schuler Thomas V. , Thomas Erin Emily , Westermann Sebastian
Published: February 2023

Abstract. The Arctic is undergoing increased warming compared to the global mean, which has major implications for fresh-water runoff into the oceans from seasonal snow and glaciers. Here, we present high-resolution (2.5 km) simulations of glacier mass balance, runoff and snow conditions in Svalbard from 1991–2022, one of the fastest warming regions in the Arctic. The simulations are created using the CryoGrid community model forced by both CARRA reanalysis (1991–2021) and AROME-ARCTIC forecasts (2016–2022). Updates to the water percolation and runoff scheme are implemented in the CryoGrid model for the simulations. In-situ observations available for Svalbard are used to carefully evaluate the quality of the simulations and model forcing. The overlap period of 2016–2021, when both CARRA and AROME-ARCTIC data are available, is used to evaluate the consistency between the two forcing datasets. We find a slightly negative climatic mass balance (cmb) over the simulation period of −0.08 m w.e. yr−1, but with no statistically significant trend. The average runoff was found to be 41 Gt yr−1, with an significant increasing trend of 6.3 Gt decade−1. In addition, we find the simulated climatic mass balance and runoff using CARRA and AROME-ARCTIC forcing are similar, and differ by only 0.1 m w.e. in climatic mass balance and by 0.2 m w.e. in glacier runoff when averaged over all of Svalbard. There is, however, a clear difference over Nordenskiöldland, where AROME-ARCTIC simulates significantly higher mass balance and significantly lower runoff. This indicates that AROME-ARCTIC may provide high-quality predictions of the total mass balance of Svalbard, but regional uncertainties should be taken into consideration. The data produced from both the CARRA and AROME-ARCTIC forced CryoGrid simulations are made publicly available, and these high resolution simulation may be re-used in a wide range of applications including studies on glacial runoff, ocean currents, and ecosystems
Leveraging Google’s Tensor Processing Units for tsunami-risk mitigation planning in the Pacific Northwest and beyond
Authors: Madden Ian , Marras Simone , Suckale Jenny
Published: February 2023

Abstract. Tsunami-risk and flood-risk mitigation planning has particular importance for communities like those of the Pacific Northwest, where coastlines are extremely dynamic and a seismically-active subduction zone looms large. The challenge does not stop here for risk managers: mitigation options have multiplied since communities have realized the viability and benefits of nature-based solutions. To identify suitable mitigation options for their community, risk managers need the ability to rapidly evaluate several different options through fast and accessible tsunami models, but may lack high-performance computing infrastructure. The goal of this work is to leverage the newly developed Google's Tensor Processing Unit (TPU), a high-performance hardware accessible via the Google Cloud framework, to enable the rapid evaluation of different tsunami-risk mitigation strategies available to all communities. We establish a starting point through a numerical solver of the nonlinear shallow-water equations that uses a fifth-order Weighted Essentially Non-Oscillatory method with the Lax-Friedrichs flux splitting, and a Total Variation Diminishing third-order Runge-Kutta method for time discretization. We verify numerical solutions through several analytical solutions and benchmarks, reproduce several findings about one particular tsunami-risk mitigation strategy, and model tsunami runup at Crescent City, California whose topography comes from a high-resolution Digital Elevation Model. The direct measurements of the simulations performance, energy usage, and ease of execution show that our code could be a first step towards a community-based, user-friendly virtual laboratory that can be run by a minimally trained user on the cloud thanks to the ease of use of the Google Cloud Platform.
IT-SNOW: a snow reanalysis for Italy blending modeling, in situ data, and satellite observations (2010–2021)
Authors: Avanzi Francesco , Gabellani Simone , Delogu Fabio , Silvestro Francesco , Pignone Flavio , Bruno Giulia , Pulvirenti Luca , Squicciarino Giuseppe , Fiori Elisabetta , Rossi Lauro , Puca Silvia , Toniazzo Alexander , Giordano Pietro , Falzacappa Marco , Ratto Sara , Stevenin Hervè , Cardillo Antonio , Fioletti Matteo , Cazzuli Orietta , Cremonese Edoardo , Morra di Cella Umberto , Ferraris Luca
Published: February 2023

Abstract. We present IT-SNOW, a serially complete and multi-year snow reanalysis for Italy (∼ 301 × 103 km2) – a transitional continental-to-Mediterranean region where snow plays an important but still poorly constrained societal and ecological role. IT-SNOW provides ∼ 500 m daily maps of snow water equivalent (SWE), snow depth, bulk snow density, and liquid water content for the initial period 1 September 2010–31 August 2021, with future updates envisaged on a regular basis. As the output of an operational chain employed in real-world civil protection applications (S3M Italy), IT-SNOW ingests input data from thousands of automatic weather stations, snow-covered-area maps from Sentinel-2, MODIS (Moderate Resolution Imaging Spectroradiometer), and H SAF products, as well as maps of snow depth from the spatialization of over 350 on-the-ground snow depth sensors. Validation using Sentinel-1-based maps of snow depth and a variety of independent, in situ snow data from three focus regions (Aosta Valley, Lombardy, and Molise) show little to no mean bias compared to the former, and root mean square errors are of the typical order of 30–60 cm and 90–300 mm for in situ, measured snow depth and snow water equivalent, respectively. Estimates of peak SWE by IT-SNOW are also well correlated with annual streamflow at the closure section of 102 basins across Italy (0.87), with ratios between peak water volume in snow and annual streamflow that are in line with expectations for this mixed rain–snow region (22 % on average and 12 % median). Examples of use allowed us to estimate 13.70 ± 4.9 Gm3 of water volume stored in snow across the Italian landscape at peak accumulation, which on average occurs on 4 March ± 10 d. Nearly 52 % of the mean seasonal SWE is accumulated across the Po river basin, followed by the Adige river (23 %), and central Apennines (5 %). IT-SNOW is freely available at https://doi.org/10.5281/zenodo.7034956 (Avanzi et al., 2022b) and can contribute to better constraining the role of snow for seasonal to annual water resources – a crucial endeavor in a warming and drier climate.
EUPollMap: The European atlas of contemporary pollen distribution maps derived from an integrated Kriging interpolation approach
Authors: Oriani Fabio , Mariethoz Gregoire , Chevalier Manuel
Published: February 2023

Abstract. Modern and fossil pollen data are widely used in paleoenvironmental research to characterise past environmental changes in a given location. However, their discrete and discontinuous nature can limit the inferences that can be made from them. In contrasts, deriving continuous spatial maps of the pollen presence from point-based datasets would enable more robust regional characterization of such past changes. To address this problem, we propose a comprehensive collection of European pollen presence maps including 194 pollen taxa derived from the interpolation of pollen data from the Eurasian Modern Pollen Database (EMPD v2) restricted to the Euro-Mediterranean Basin. To do so, we developed an automatic Kriging-based interpolation workflow to select an optimal geostatistical model describing the spatial variability for each taxon. The output of the interpolation model consists in a series of multivariate predictive maps of Europe at 25-km scale, showing the occurrence probability of pollen taxa, the predicted presence based on diverse probability thresholds, and the interpolation uncertainty for each taxon. Visual inspections of the maps and systematic cross-validation tests showed that the ensemble of predictions is reliable even in data-scarce regions, with a relatively low uncertainty, and robust to complex and non-stationary pollen distributions. The maps, freely distributed as GeoTIFF files, are proposed as a ready-to-use tool for spatial paleoenvironmental characterization. Since the interpolation model only uses the coordinates of the observation to spatialise the data, similar maps could also be derived for fossil pollen records, thus enabling the spatial characterization of past changes, and possibly, their subsequent use for quantitative paleoclimate reconstructions.
Intercomparison of the weather and climate physics suites of a unified forecast/climate model system (GRIST-A22.7.28) based on single column modeling
Authors: Li Xiaohan , Zhang Yi , Peng Xindong , Zhou Baiquan , Li Jian , Wang Yiming
Published: February 2023

Abstract. As a unified weather-forecast/climate model system, Global-to-Regional Integrated forecast SysTem (GRIST-A22.7.28) currently employs two separate physics suites for weather forecast and typical long-term climate simulation, respectively. Previous AMIP-style experiments have suggested that the weather (PhysW) and climate (PhysC) physics suites, when coupled to a common dynamical core, lead to different behaviors in terms of modeling clouds and precipitation. To explore the source of their discrepancies, this study compares the two suites using a single column model (SCM). The SCM simulations demonstrate significant differences in the simulated precipitation and low clouds. Convective parameterization is found to be a key factor responsible for these differences. Compared with PhysC, parameterized convection of PhysW plays a more important role in moisture transport and rainfall formation. The convective parameterization of PhysW also better captures the onset and retreat of rainfall events, but stronger upward moisture transport largely decreases the tropical low clouds in PhysW. These features are in tune with the previous 3D AMIP simulations. Over the typical stratus-to-stratocumulus transition regime such as the Californian coast, shallow convection in PhysW is more prone to be triggered and leads to larger ventilation above the cloud layer, reducing stratocumulus clouds there. These two suites also have intrinsic differences in the interaction between cloud microphysics and other processes, resulting in different time step sensitivities. PhysC tends to generate more stratiform clouds with decreasing time step. This is caused by separate treatment of stratiform cloud condensation and other microphysical processes, leading to a tight interaction with boundary layer turbulence. In PhysW, all the microphysical processes are executed at the same temporal scale, and thus no such time step sensitivity was found.
APPLICATION OF GEOSPATIAL AND HYDROLOGICAL MODELING FOR RUNOFF ESTIMATION IN LEBIR RIVER BASIN, MALAYSIA
Authors: Mohamad Sukairi S. , Harun S. , Mohd Nasir K. A. , Jeevaragagam P. , Mohd Salleh M. R.
Published: February 2023

Abstract. Non-stop heavy rain had happened on 15th December of 2014, causing flood in Kelantan districts. Approximately 250 of flood victims in three districts were involved and relocated to six temporary relief centres. A hydrological model is designed to simulate the runoff process for a catchment area. In this study, Hydrologic Engineering Center Modelling System (HEC-HMS) and Rainfall-Runoff-Inundation (RRI) modeling method were used in the simulation of flow hydrograph for the Sungai Lebir catchment. Establishing the simulation at Sungai Lebir using the both models may help in analysing large-scale flooding in the future. The use of HEC-HMS and RRI require data of precipitation and flow rates obtained from the Department of Irrigation and Drainage (DID) centre. There are two main processes in the modelling stage namely calibration and validation. A total of two dates of rainfall events used for the calibration process; the events on December 5, 2014 to December 11, 2014 (Calibration 1) and December 15, 2014 to December 20, 2014 (Calibration 2) which resulting low NSE value for Calibration 1 with −9.806 and −0.312 for HEC-HMS and RRI, respectively. Whereas for the validation process, two sets of events on December 1, 2001 to January 7, 2002 (Validation 1) and November 16, 2013 to December 23, 2013 (Validation 2) have been used, resulting that HEC-HMS outperformed RRI with the recorded value of 0.817 and 0.821, for Validation 1 and Validation 2, respectively. The results indicate that the flow rate computed using the HEC-HMS software is not significantly different from the actual flow rate, and it also demonstrates the suitability of the HEC-HMS software for use in flow rate estimation.
THE JOINT SPATIAL PLANNING DATA MODEL
Authors: Yılmaz O. , Alkan M.
Published: February 2023

Abstract. In modern times, spatial planning activities have been the process of determining projections for future land use. Spatial plans produce decisions about space in many different fields, from construction to transportation and environmental, natural, and cultural protection. The right, restrictions, and responsibilities (RRRs) to use the land pieces whose physical borders and legal status are registered with the cadastral process are determined by the spatial plans in line with the national purposes, public welfare, and healthy urbanization objectives.Land Administration Domain Model (LADM) is a general-purpose data model introduced in 2012 with International Organization for Standardization (ISO) standards. LADM proposes standards for many data infrastructures and land administration systems. In this context, although it does not have complete recommendations within the scope of spatial planning. It is essential to make additions to version II. As a result of gradual studies, spatial planning processes and decisions can be presented in a data model and the model can be associated with the LADM standard structure and integrated into land registration systems. Since LADM offers a conceptual model, newly created packages must be designed in a conceptual data model. The conceptual model is a product of several stages. This study focuses on how can produce a conceptual model in which countries can share spatial planning data. The requirements of the model that achieves this aim are revealed by considering the conceptual model production stages. By evaluating the findings, how can obtained data which helping to design the classes, class relations, and attributes of the data model were searched. With the conceptual data model to be prepared in line with the requirements, it is thought that land management processes can be strengthened by providing integration with spatial plans in LADM-based land administration systems.
Landsat, MODIS, and VIIRS snow cover mapping algorithm performance as validated by airborne lidar datasets
Authors: Stillinger Timbo , Rittger Karl , Raleigh Mark S. , Michell Alex , Davis Robert E. , Bair Edward H.
Published: February 2023

Abstract. Snow cover mapping algorithms utilizing multispectral
satellite data at various spatial resolutions are available, each treating
subpixel variation differently. Past evaluations of snow mapping accuracy
typically relied on satellite data collected at a higher spatial resolution
than the data in question. However, these optical data cannot characterize
snow cover mapping performance under forest canopies or at the meter scale.
Here, we use 3 m spatial resolution snow depth maps collected on 116 d by
an aerial laser scanner to validate band ratio and spectral-mixture snow
cover mapping algorithms. Such a comprehensive evaluation of sub-canopy snow
mapping performance has not been undertaken previously. The following
standard (produced operationally by an agency) products are evaluated: NASA
gap-filled Moderate Resolution Imaging Spectroradiometer (MODIS) MOD10A1F,
NASA gap-filled Visible Infrared Imaging Radiometer Suite (VIIRS) VNP10A1F,
and United States Geological Survey (USGS) Landsat 8 Level-3 Fractional Snow Covered Area. Two spectral-unmixing approaches are also evaluated: Snow-Covered Area and Grain Size
(SCAG) and Snow Property Inversion from Remote Sensing (SPIReS), both of
which are gap-filled MODIS products and are also run on Landsat 8. We assess
subpixel snow mapping performance while considering the fractional
snow-covered area (fSCA), canopy cover, sensor zenith angle, and other
variables within six global seasonal snow classes. Metrics are calculated at
the pixel and basin scales, including the root-mean-square error (RMSE),
bias, and F statistic (a detection measure). The newer MOD10A1F Version 61
and VNP10A1F Version 1 product biases (− 7.1 %, −9.5 %) improve
significantly when linear equations developed for older products are applied
(2.8 %, −2.7 %) to convert band ratios to fSCA. The F statistics are
unchanged (94.4 %, 93.1 %) and the VNP10A1F RMSE improves (18.6 %
to 15.7 %), while the MOD10A1F RMSE worsens (12.7 % to 13.7 %).
Consistent with previous studies, spectral-unmixing approaches (SCAG,
SPIReS) show lower biases (−0.1 %, −0.1 %) and RMSE (12.1 %, 12.0 %), with higher F statistics (95.6 %, 96.1 %) relative to the band
ratio approaches for MODIS. Landsat 8 products are all spectral-mixture
methods with low biases (−0.4 % to 0.3 %), low RMSE (11.4 % to 15.8 %),
and high F statistics (97.3 % to 99.1 %). Spectral-unmixing methods can
improve snow cover mapping at the global scale.
Pengaruh Sosialisasi Perpajakan, Pelayanan Aparat Pajak dan Pemahaman Wajib Pajak Terhadap Kepatuhan Wajib Pajak Dengan Preferensi Risiko Sebagai Variabel Moderasi
Authors: Heliani  , Risma Yulianti  , Nanan Sunandar
Published: February 2023

Penelitian ini bertujuan untuk menguji: pengaruh sosialisasi perpajakan, pelayanan aparat pajak, pemahaman wajib pajak, dan preferensi risiko wajib pajak terhadap kepatuhan wajib pajak, penelitian ini juga bertujuan untuk menguji pengaruh preferensi risiko yang berperan sebagai variabel moderasi pada hubungan antara sosialisasi perpajakan terhadap kepatuhan wajib pajak, pengaruh preferensi risiko yang berperan sebagai variabel moderasi pada hubungan antara pelayanan aparat pajak terhadap kepatuhan wajib pajak, dan pengaruh preferensi risiko yang berperan sebagai variabel moderasi pada hubungan antara pemahaman wajib pajak terhadap kepatuhan wajib pajak. Penelitian ini dilakukan dengan metode convenience sampling dengan sampel 155 responden dari wajib pajak orang pribadi di KPP Pratama Sukabumi. Data yang digunakan adalah data primer melalui kuesioner yang berisi jawaban-jawaban responden. Analisis data yang digunakan dalam penelitian ini adalah Moderated Regression Analysis. Hasil penelitian menunjukan bahwa sosialisasi perpajakan, pelayanan aparat pajak, pemahaman wajib pajak dan preferensi risiko berpengaruh positif terhadap kepatuhan wajib pajak. Selain itu variabel moderasi yaitu preferensi risiko tidak memperkuat pengaruh positif terhadap hubungan antara sosialisasi perpajakan, pelayanan aparat pajak dan pemahaman wajib pajak dengan kepatuhan wajib pajak.
CRITICAL ANALYSIS OF THE PERFORMANCE OF WOMEN'S ARTISTIC GYMNASTICS IN BRAZIL IN THE 2004-2016 OLYMPIC CYCLES
Authors: Molinari Caroline  Inácio , Costa Vitor Ricci , Monteiro Kamau  Osei Fregonesi Ferreira , Nunomura Myrian
Published: February 2023

Women’s Artistic Gymnastics (WAG) in Brazil has been represented in the Olympic Games since 1980; however, a full team was classified only in 2004. Analyzing the Brazilian team’s participation over the last four cycles (2004-2016), we have identified several factors that implied in the WAG results. In this study, we discussed these factors and reflected on their contributions to the development of the gymnastics. The milestone of the 2001-2004 Olympic cycle is marked by the first participation of a full team, when foreign coaches came to lead WAG, the training system was reorganized, and the selected athletes began training in a centralized training system in Curitiba’s Training Center. The 2005-2008 Olympic cycle was more successful, as a consequence of the long-term planning. In the 2009-2012 Olympic cycle, the Brazilian WAG went through a period of turbulence, the training was no longer centralized, and the head coach of the Brazilian team returned to his home country. In the 2013-2016 Olympic cycle, with the headquarters of the 2016 Olympic Games in the city of Rio de Janeiro, the Brazilian Olympic Committee devised strategies to boost the country’s success, which again drove improvement in the team results. We concluded that the last Olympic cycles represented a major advance in Brazilian WAG. Restructuring since 2000 has been paramount condition for the gymnastics discipline to reach the current level. The improvement in training and competition conditions, the structuring of a Training Center of excellence, and the multidisciplinary team support was essential for the preparation of Brazilian team in the Olympic Games.
Intercultural Communication Marriage Interethnic Javanese - Acehnese at Al-Muslim University Bireuen
Authors: Azhar Al , Anom Erman , . Sulaiman
Published: February 2023

This study “Intercultural Communication Marriage Interethnic Javanese - Acehnese at Almuslim University Bireuen”. Researching; How intercultural communication in Javanese and Acehnese interethnic marriages at the Almuslim University? How is the integration of both cultures in the household of a married couple interethnic Javanese-Acehnese at the Almuslim University? With research purposes; Analyze how intercultural communication in inter-ethnic marriages Javanese and Acehnese at the Almuslim University. Analyzing how the integration of the two cultures in the household of a married couple interethnic Javanese-Acehnese at the Al-Muslim University. The main data sources in qualitative research is words and actions, the rest is data and other documents. Qualitative data is data or information most especially excavated and collected and examined for the purposes of this research. Extracting information from various data sources. Dramaturgical theory of Erving Goffman, how good a person's role in front of the stage or backstage. Cultural component is the most dominant beliefs, values and norms. Then gave birth to the integration of cultural interest, because each party realizes that they give and receive. The most attractive thing turns out they hand over all the issues into the path of religion which is a large umbrella to shade the culture itself.

Keywords: Communication, Intercultural, Inter-ethnic marriage, Java and Aceh, Al-Muslim University.
The Effect of Using Learning Methods on Learning Outcomes Front Roll Viewed from the Flexibility Factor in Class X Students of SMK Negeri Kademangan, 2021
Authors: Fitriastuti Danti , Himawanto Wasis , Afandi Zainal
Published: February 2023

The background of this research is the lack of teacher methods in giving instructions or lessons on floor gymnastics, especially the front roll. Many students experience difficulties and injuries when doing the front roll practice. Therefore we need a type of method that can be used to anticipate these problems. One method that can be used is to use video in the learning process of floor gymnastics. In addition, the level of flexibility of students also has an influence on success in doing the front roll. This study will discuss the effect of using the video method in learning floor gymnastics.
The problems of this research are (1) Can learning methods and flexibility factors affect the results of the front roll of floor exercise in class X SMKN 1 Kademangan? (2) How big is the influence of learning methods and flexibility factors on the front roll of floor gymnastics in class X SMKN 1 Kademangan? (3) Which is the better learning outcome through the demonstration method or the video method in learning the front roll of floor exercise?
The type of research used is experimental research. The subjects used were students of class X TKJ SMKN Kademangan. The research subjects will be divided into two class groups, namely groups that use video media and groups that use demonstration methods. Both groups will be given a pretest to determine the initial ability. Furthermore, all subjects will be measured the level of flexibility. Flexibility will be divided into two, namely high flexibility and low flexibility. Determination of the level of flexibility of students based on the flexibility test. The analytical technique used for data analysis is one-way ANOVA, independent sample t test and linear regression.
The test results for the two groups found that there was an influence given by the learning method and the flexibility factor on the students' front roll results. The results of calculations using ANOVA found a significance value of 0.008. This value is smaller than 0.05 so it can be concluded that there is a significant effect of the use of learning methods and the level of student flexibility. Furthermore, based on regression analysis, it was found that the method used and the level of flexibility had an effect of 13.4% on the students' front roll results. Subsequent testing using the Independent sample t test found that the video method was better than the demonstration method. The video method can significantly increase by 3.8 of students' front roll results. The conclusion in this study is that the use of the video method is better if it is used to improve students' front roll results.

Keywords: learning method, flexibility, front roll, floor exercise.
Closure of Fasciotomy Wound Using Dynamic Dermal Approximation Technique
Authors: Khurshid Junaid , Gundavarapa Avinash , Ahmad Bhat Bashir
Published: February 2023

Purpose: Compartment syndrome is a surgical emergency that is managed by a fasciotomy. However, it is associated with complications, including long hospital stay, wound infection and osteomyelitis need for further surgery for delayed wound closure or skin grafting, scarring, delayed bone healing, pain and nerve injury, permanent muscle weakness, chronic venous insufficiency, cosmetic problems, and an overall increased cost of care. A need for an early closure technique that will decrease all the above complications is described in this study.
Methods: This study was carried out in the Plastic Surgery Department of GMC Srinagar between from January 2020 to December 2022.This hospital-based study was done on compartment syndrome patients where fasciotomy was done and the wound closed by dynamic dermal suture approximation technique and results reviewed and outcome assessed.
Results: The technique was applied to a total of 12 patients with compartment syndrome. Ten of twelve patients in study were compartment syndrome of upper limb since severe lower limb trauma patients were excluded in view of need for other procedures. The wounds were divided into three classes as post burn, post trauma and post contrast extravasation. Wound closure was achieved in 75 percent of total cases and all of six post contrast extravasation compartment syndrome patients. Conclusion: Following a fasciotomy, wound closure is a topic that is often controversial. The preference for one technique over another is influenced by the availability of resources, institutional familiarity, and clinical scenarios. Dynamic dermal approximation sutures can be applied with minimal risk to most uncomplicated fasciotomies. The benefits are minimal complication, the best cosmetic outcome, and low cost. However, patients with a high risk of complications may need other methods.

Keywords: Compartment Syndrome, Fasciotomy, Wound Closure Techniques, Negative-Pressure Wound closure
Development of Character-Based Intensive Reading of Indonesian Texts for Improving Class IV Learning Outcomes of State Elementary Schools of Boarding Schools in Cirebon
Authors: Ling Habibah Sing , Sunarso Ali , Setiawan Deni
Published: February 2023

The purpose of this study was to develop character-based intensive reading materials for Indonesian language texts. The development of this product uses an adaptation of the research and development model (Research & Development) based on the Borg & Gall model. The research stage procedures are Define, Design, Development, and Disseminate. The results showed that the results of the teaching material expert validator got a percentage of 95%, language validator experts with a percentage of 95%. Intensive text reading teaching materials are effectively used in increasing student learning outcomes from the results of hypothesis testing at a sig.(2-tailed) value of 0.026 <0.05 means that Ho is rejected, meaning that there is a difference in increasing learning outcomes between the experimental and control classes.

Keywords: Teaching materials, Indonesian, character-based, learning outcomes
Palynological Study and Age Dating of the Early Miocene Dukku Claystone Type Section of Gwandu Formation, Sokoto Basin, Northwestern Nigeria
Authors: A.O. Ola-Buraimo , R.G. Oladimeji , K.W. Adamu
Published: February 2023

Outcrop samples were collected from Dukku area for the purpose of subjecting them to palynological analysis in order to determine the relative age of Gwandu Formation and palaeoenvironment of deposition of the deposit. Field and laboratory methods were carried out in order to obtain lithological sequence description of the outcrop. The samples obtained went through processes of acid digestion with hydrochloric acid, hydrofluoric acid and separation of macerals by floatation with the use of zinc bromide. The prepared slides were observed under microscope for palynomorph contents. Diagnostic palynomorphs that are stratigraphically important for palynozonation were retrieved such as Belskipollis eligans, Verrutricolporites laevigatus. Striamonocolpites sp., Retibrevitricolporites sp., Retibrevitricolporites obodoensis, Retistephanocolpites sp., Cingulatisporites ornatus, Longapertites marginatus and Proteacidites sp. The marker fossils belong to Magnatariatites horwardii zone; Zone P600 and Subzone P630 and C1 Zone of Nigerian Niger Delta sedimentary basin zonal schemes, dated Early Miocene age. Dinoflagellate forms recovered include Batiacasphaera sp., Senegalinium sp., Andalusiella polymorpha Selenophemphix nephroides, Andalusiella sp., Andalusiella laevigata, Histrichosphaera turocona and undifferentiated dinoflagellate cysts of peridinacean forms that belong to marginal marine setting.
Masker Gel Peel-Off Anti Jerawat Dari Ekstrak Teh Hijau
Authors: Yuhara Novena Adi , Nono Agustinus Jitro , Kristariyanto Yosua Adi
Published: February 2023

Daun teh hijau (Camellia sinensis L.) merupakan tanaman yang mengandung senyawa flavonoid yang berguna sebagai antioksidan. Sediaan masker gel merupakan bentuk sediaan gel yang mudah diaplikasikan, tidak berminyak, menyejukan, mudah berpenetrasi dengan kulit, mudah dicuci dengan menggunakan air, dan juga tidak beresiko menyumbat pori-pori kulit wajah. Tujuan penelitian ini untuk membuat sediaan masker gel peel off dari ekstrak teh hijau dan dilakukan uji evaluasi sediaan yang sesuai dengan persyaratan formulasi. Uji Evaluasi dilakukan yaitu, pengujian organoleptis, homogenitas, uji pH, uji daya sebar, uji daya lekat, dan uji aktivitas antibakteri. Hasil yang diperoleh pada ui organoleptis adalah formula 1 berwarna merah bata, sedangkan formula 2 dan 3 berwarna coklat, dengan bau khas teh hijau dan sediaan berbentuk gel. Hasil uji homogenitas didapatkan hasil bahwa sediaan sudah homogen. Hasil uji pH yaitu 5 dan 6 dan dinyatakan sudah sesuai dengan pesyaratan. Hasil uji daya sebar yang didapatkan diameter yang belum memenuhi rentang daya sebar yang disebabkan oleh sediaan yang terlalu cair. Hasil rata-rata waktu uji daya lekat, yaitu pada formula 1 dengan rata-rata 00,34 detik, formula 2 dengan rata-rata 00,58 detik, formula 3 dengan rata-rata 00,57 detik,  serta melakukan  uji aktivitas antibakteri dengan hasil diameter yang dimiliki menunjukan adanya zona hambat terhadap bakteri Staphylococcus aureus.
Penggunaan Metode Kromatografi Lapis Tipis Kinerja Tinggi (KLTKT)-Densitometri Dalam Penetapan Kadar Vitamin B1 Pada Kacang Kedelai (Glycine max)
Authors: Misfadhila Sestry , Alfitroh Ijazati , Effendy Sanezea , Agustina Endang
Published: February 2023

Kedelai (Glycine max) diketahui mengandung berbagai nutrisi salah satunya vitamin B1 atau tiamin. Tiamin merupakan vitamin yang dibutuhkan untuk menimbulkan nafsu makan, membantu penggunaan karbohidrat dalam tubuh dan sangat berperan dalam sistem saraf. Pada penelitian ini dilakukan penetapan kadar vitamin B1 pada kacang kedelai dengan menggunakan metode kromatografi lapis tipis kinerja tinggi (KLTKT)-Densitometri. Sampel diekstraksi dengan menggunakan air suling 20 mL dan metanol 30 mL. Analisis dengan KLT menggunakan metanol: air: asam asetat: amoniak (5: 4,5: 0,5: 0,75) sebagai fase gerak dan silika gel 60 F254 sebagai fase diam. Hasil KLTKT menunjukkan bahwa sampel memiliki nilai Rf yang sama dengan pembanding (Rf = 0,5). Linearitas vitamin B1 diperoleh pada rentang konsentrasi 100-500 µg/mL dengan nilai koefisien korelasi 0,998 dan persamaan regresi y = 238,4 + 5,575x. Nilai simpangan baku 37,1724 µg/mL, batas deteksi 20,0031 µg/mL dan batas kuantitasi 66,677 µg/mL. Analisis kuantitatif menggunakan densitometri diperoleh kadar vitamin B1 sebesar 0,0599 ± 0,002363 %.
Free-flight experiments in high-speed wind tunnels
Authors: Laurence Stuart
Published: February 2023

Free-flight experiments are an invaluable tool in hypersonic wind tunnels for studying a range of unsteady high-speed-flow problems: relevant examples include store, stage, and shroud separation, destructive re-entry and meteoroid fragmentation. Also, since traditional force-balance methods are difficult or impossible to implement in short-duration hypersonic tunnels, free-flight techniques can provide a convenient means of aerodynamic measurement in such facilities, provided the model motion can be accurately recorded. In the first part of this seminar, I will describe the development of a class of optical-tracking techniques for the nonintrusive measurements of model orientation and position in free-flight experiments. The common thread of these tracking techniques is the combination of subpixel edge detection applied to experimental images (typically shadowgraph or schlieren) with least-squares fitting of a generated model outline. The most sophisticated of these techniques has been shown to be capable of 5 DoF measurements of arbitrary geometries (with a single camera), with a precision approaching 1 micron and 0.001 degrees. In the second part of the seminar, I will describe the application of free-flight and optical-tracking techniques to several high-speed problems of interest, including the determination of force and moment coefficients on complex bodies, separation of objects from a ramp surface, and aerodynamic breakup of particle clusters.
Constituintes da profissão docente no ensino de Química da Educação Básica
Authors: Martins Júnior Francisco Ranulfo Freitas , Vidal Eloisa Maia
Published: February 2023

Este artigo apresenta resultados de pesquisas acadêmicas nacionais e internacionais, nas últimas duas décadas, sobre os constituintes da profissão docente na área de Ciências da Natureza, focalizando a disciplina de Química, sobretudo formação inicial e docência. Para isto, realizou-se uma revisão de literatura sistematizada, considerando o período 2000 – 2018, com o levantamento de 10 teses, 21 dissertações e 5 artigos científicos. Os trabalhos foram identificados por meio de uso dos descritores “formação inicial de professores de Química and profissão professor”, “carreira docente em Química and profissão professor” e “profissão professor de Química and atratividade da docência”, nos repositórios Biblioteca Digital Brasileira de Teses e Dissertações, Catálogo de Teses e Dissertações da Capes, Portal de Periódicos da Capes e ScienceDirect. Por meio da análise de evidências extraídas destes trabalhos, foi possível identificar que a pesquisa sobre a temática em estudo vem sendo desenvolvida predominantemente: i) pelo suporte das categorias teóricas profissão, identidade, formação e trabalho, relativas à docência; ii) por abordagem qualitativa; iii) pelo estudo de caso, tendo por ambiente de investigação o curso de licenciatura em Química ofertado em universidade; iv) pela captação de dados qualitativos com uso de questionário e entrevista aplicados ao licenciando e ao egresso deste curso, bem como os oriundos de documentos que caracterizam-no; v) por técnicas de análise de dados baseadas na compreensão da linguagem humana. Considera-se que, no cenário brasileiro, nos últimos anos, a profissão docente na área de Química passou a ser investigada em Programas de Pós-Graduação stricto sensu de algumas universidades.
História da Química no Teatro: Proposta de Ensino Contextualizado
Authors: Da Silva Valdecir Manoel , Dantas Filho Francisco Ferreira
Published: February 2023

As propostas de ensino atuais apontam para a necessidade de mediação dos professores na construção do conhecimento pelos estudantes face às informações absorvidas no cotidiano. São inegáveis demandas por recursos e estratégias de ensino que contribuam com a aprendizagem dos conteúdos escolares. O trabalho teve como objetivos elaborar e aplicar uma proposta didático-pedagógica interdisciplinar ressaltando a História da Ciência nas aulas de química por meio do teatro e vincular o conhecimento científico aos conhecimentos prévios dos educandos valendo-se das inteligências múltiplas para favorecer o desenvolvimento de competências e habilidades, despertando o interesse pela química e rompendo paradigmas que perpetuam o ensino deste componente curricular. Tratou-se de uma pesquisa exploratória, com abordagem qualitativa. Foram participantes quarenta e dois (42) estudantes do 2º ano do Ensino Médio em uma escola pública estadual no Município de Macaparana-PE. Teve-se como instrumento de coleta um questionário semiestruturado direcionado aos professores de variadas disciplinas e três questões direcionadas aos estudantes participantes da proposta. Os dados foram sistematizados e interpretados à luz do referencial teórico. Os resultados apontam que a proposta e recursos utilizados foram bem aceitos pelos educadores e educandos e ampliaram o conhecimento científico dos educandos. Evidenciou-se, ainda, que o recurso propicia maior interação dos alunos entre si e com os professores, e que a inserção do teatro nas atividades pedagógicas motiva a participação dos educandos nas aulas contribuindo com a aprendizagem dos conteúdos.
O Panorama da Argumentação Científica no Ensino de Química
Authors: Pires Vida Leal Luana , Figueiredo Salvi Rosana , Lorenzetti Leonir
Published: February 2023

O trabalho objetiva discutir a argumentação científica no Ensino de Química analisadas em artigos publicados nas revistas classificadas no webqualis da CAPES - quadriênio 2013 - 2016, de estrato A1: Ciência & Educação (1998-2019), Enseñanza de las Ciencias (1983-2019) e International Journal of Science Education (1979-2019). As produções científicas foram analisadas à luz da Análise de Conteúdo de Bardin (2011), evidenciando as categorias “Formação de Professores”; “Utilização da Argumentação para Finalidades Pedagógicas” e “Discussões Teóricas”. O corpus da pesquisa foi constituído por meio da seleção das palavras “argumentação”, “argumentação científica”, suas derivações e respectivas traduções nos idiomas inglês/espanhol. Os resultados apontam mecanismos argumentativos associados a diversas estratégias de ensino e de aprendizagem, advindos de diferentes nacionalidades, a partir de estudos de abordagem quantitativa e qualitativa, ambas apontando o potencial da argumentação científica como recurso que auxilia na discussão de temas sociocientíficos e desenvolvimento do conhecimento científico, além de ressaltar a importância da presença da argumentação científica na formação inicial. Confirmou-se que a argumentação científica é debatida a nível internacional e, ainda que majoritariamente utilizada para fins pedagógicos, o campo na Formação de Professores e as Discussões Teóricas referentes à argumentação científica têm sido ascendentes, o que abre caminhos para que novos entrelaçamentos ao ensino de Química sejam feitos e, com isso, compreender os percursos argumentativos dos estudantes e auxiliá-los na aprendizagem dos saberes químicos.
Evaluasi Electric Submersible Pump Pada Sumur PMB 19 di PT Pertamina Hulu Rokan Lapangan Prabumulih
Authors: ILHAM MUHAMMAD , Suranta Bambang Yudho
Published: February 2023

Pengangkatan fluida dari wellbore sumur ke surface dapat dilakukan melalui dua metode yaitu dengan natural flow (sembur alam) dan pengangkatan buatan (artificial lift). Salah satu metode pengangkatan buatan adalah electric submersible pump (ESP). Pada sumur PMB-19 telah terpasang ESP TD-1200 45 Hz 198 stages dengan produktivitas sumur awal PI 2.5 BPD/psi dengan laju alir maksimum 30309 BPD.Pada sumur PMB-19 di lakukan evaluisi untuk menentukan efisien atau tidaknya kinerja pompa, agar sumur dapat di optimalkan berdasarkan parameterr produktivitas sumur berdasarkan  3309 bpd,  2467 blpd,  264,72, dan  2382 bwpd. Dan besarnya TDH 2.484 ft, jumlah stages 198, BHP 39,88 HP, motot load 40% dan KVA 136. Dari hasil Evaluasi yang didapat, dapat di tentukan spesifikasi pompa yang sesuai parameter Qoptimum yang di hitung sebesar 2467.26 BPD maka kita mendapatkan spesifikasi pompa yang sesuai yaitu TDH sebesar 4366.36 ft dari TDH, PSD 5416 ft, dan PIP sebesar 751.39 psi Dari hasil evaluasi yang di dapatkan produktivitas sumur belum optimal di karna laju perbedaan yang amat signifikan, antara laju alir sumur saat ini dengan laju alir optimalnya.
OPTIMALISASI REMAINING LIFE STORAGE TANK TK 1401F DENGAN METODE PENGUKURAN THICKNESS DI PT PETROKIMIA GRESIK
Authors: Maulana Raditya Iqbal , Suharyadi Hafid
Published: February 2023

Tangki TK 1401-F merupakan tangka penyimpanan berisi 98,5% sulfuric acid yang merupakan fluida korosif. Tangki TK 1401-F memiliki kapasitas nominal 5525 m3 dan 4420 m3 pada kapasitasnya kerjanya. Di dalam proses penyimpananya selama bertahun-tahun, tangka penyimpanan TK 1401-F mengalami adanya perubahan pada segi penipisan pada bagian-bagiannya dikarenakan faktor lingkungan dan laju korosinya. Maka dari itu, penulis melakukan analisis mengenai laju korosi pada tangka TK 1401-F dengan metode pengukuran thickness pada tiap corse shell. Dengan adanya perhitungan ini, maka akan di dapatkan sis umur tiap course pada shell. Pada perhitungannya didapatkan laju korosi tertinggi pada course 4 dengan laju korosi sebesar 0,24 mm/year. Perhitungan stress pada tiap course shell masih acceptable dikarenakan tidak melebihi maximum allowable stressnya. Penulis mengoptimasi tebal dari shell agar tiap course shell bertahan hingga 20 tahun ke depan.
Optimalisasi Unjuk Kerja Boiler PLTU Unit III PT. PJB UP Gresik
Authors: Santoso Hadi Fajar
Published: February 2023

PT. Pembangkit Jawa Bali Unit Pembangkitan Gresik memiliki 6 unit pembangkitan, yaitu 1 Unit PLTG, 4 Unit PLTU, dan 1 Unit PLTGU. Boiler di PLTU Unit III. PT Pembangkit Jawa Bali Unit Pembangkitan Gresik beroperasi pada maximum load, yaitu 180 MW. PLTU Unit III mengalami force shutdown akibat furnace high draft dan terindikasi kebocoran wall tube sehingga perlu dilakukan perhitungan evaluasi unjuk kerja Boiler. Optimalisasi unjuk kerja boiler dilihat dari data desain dan data operasi harian agar boiler dapat beroperasi sesuai kebutuhan PLTU. Berdasarkan data desain, efisiensi unjuk kerja boiler menunjukkan angka 89.14 % dan setelah dilakukan perhitungan efisiensi unjuk kerja mendapat nilai 86.637%. Kapasitas main steam yang turun dari 696.7 ton/jam menjadi 574.388 ton/jam. Setelah dilakukan optimalisasi, efisiensi unjuk kerja naik menjadi 87.1% dengan mengubah parameter temperature uap dari superheater dan reheater menjadi 544oC.
PENENTUAN CADANGAN MINYAK SUMUR F-14 DENGAN METODE DECLINE CURVE ANALYSIS DI LAPANGAN VOLVE
Authors: Walay Muhamad Gibral , Rosiani Diyah , Candra Arya Dwi
Published: February 2023

Decline Curve Analysis merupakan salah satu metode perhitungan cadangan. Metode ini dapat digunakan untuk menaksir masa suatu sumur dan juga dapat menghitung besarnya cadangan minyak dan gas pada suatu sumur yang masih bisa diproduksikan. Penentuan cadangan minyak menggunakan data produksi sumur yang berasal dari lapangan volve yaitu sumur F-14. Sumur F-14 berproduksi dari tahun 2008 sampai dengan tahun 2016 maka penulis menggunakan data produksinya untuk menaksir umur dari sumur F-14 dan juga menghitung jumlah cadangan sisa dari sumur F-14 sampai batas Q limitnya. Data-data yang dapat digunakan dalam penentuan cadangan minyak dan menaksir masa dari sumur F-14 yaitu data Original Oil In Place 154.100.100 MSTB, data Produksi sumur F-14 dan data Q limit sumur F-14 = 628,98 STB/d. selanjutnya pemilihan trend produksi sumur F-14 dan menggunakan metode Trial Error and X2-Chisquare Test. dari hasil pemilihan trend maka didapatkan Exponential karena memiliki nilai X2 paling kecil dan dalam penentuan cadangan minyak dan umur dari sumur F-14 menggunakan metode Decline Curve Analysis yang dilakukan didapatkan hasil Estimated Ultimate Recovery = 2.056.781,8 MSTB, Recovery Factor  = 7%, Estimated Recoverable Reserve = 323.734,6 MSTB dan jika sumur F-14 melanjutkan produksi dari juli 2016 maka sumur F-14 akan mencapai Q limit pada juni 2021.
PICOHYDRO UV-TRAP: PERANGKAP HAMA WERENG BATANG COKLAT DENGAN KEMANDIRIAN ENERGI GUNA MENDUKUNG POTENSI LOKAL PETANI PADI DESA LEMBENGAN
Authors: Riskiawan Hendra Yufit , Rachmanita Risse Entikaria , Setyohadi Dwi Putro Sarwo
Published: February 2023

Dusun Krajan Desa Lembengan, Kecamatan Ledokombo, Kabupaten Jember, Jawa Timur berada di latitude -8,15036968 dan dan longitude 113,83917299. Jarak Desa Lembengan dari Politeknik Negeri Jember  adalah 16,8 km dan memiliki ketinggian 100 – 2005 dpl. Tim pengabdian melakukan identifikasi langsung pada mitra, diketahui bahwa populasi wereng Batang Coklat (WBC) telah menyerang hamparan padi  seluas 40 ha. Wereng inilah yang teridentifikasi menyerang lahan padi mitra sehingga sangat merugikan petani padi di Desa Lembengan. Hal tersebut berpotensi menyebabkan kegagalan panen sekitar 10-15%. Penanganan yang dilakukan untuk memberantas hama masih dilakukan secara konvensional menggunakan insektisida. Potensi lain yang dimiliki Desa Lembengan adalah picohydro, aliran sumber air di sungai persawahan mitra memiliki potensi picohydro dengan debit air sekitar ± 23 ltr/dtk. Kegiatan penerapan picohydro UV-Trap sebagai alat perangkap hawa wereng otomatis telah dilakukan serta telah dilakukan  sosialisai dan pelatihan penggunaan alat terhadap pemanfaatan energi alternatif untuk penghematan penggunaan energi dengan memanfaatkan picohydro sebagai sumber energi alternatif. Pemanfaatan sumber energi picohydro mendukung program pemerintah terkait penggunaan listrik yang bersumber dari Energi Baru Terbarukan (EBT).
EVALUASI KINERJA SRP PADA LAPANGAN TALANG JIMAR PT PERTAMINA HULU ROKAN
Authors: Oratmmangun Mickhael , Nirmala Gerry
Published: February 2023

Sucker Rod Pump (SRP) atau pompa angguk merupakan metode (artificial lift) yang biasanya di gunakan untuk lapangan minyak. Terjadi peralihan métode dari natural flow ke artificial lift di sebabkan terjadi penurunan laju alir sehingga membuat sumur tidak dapat memproduksikan secara optimum. Sumur X mempunyai Productivity Index sebasar 1,38 bpd/psi dengan laju alir maksimum 1465,42 bpd sehingga pada sumur X Lapangan Talang Jimar di lakukan evaluasi dengan tujuan untuk mengetahui efisiensi pompa pada sumur X. Sumur X memiliki laju alir total sebesar 216 bfpd dan hasil evaluasi pompa untuk SRP sebesar 27,86%. Evaluasi dilakukan pada sumur X dengan faktor percepatan 0,21 inch, SG campUran 0,43 , plunger overtravel 0,81 inch, kehilangan langkah et 0,11 inch dan er 0,46 inch, efektif plunger stroke 119,42, pump displacment 775,07 inch, beban rod 2759,04 lb, beban fluida 2570,09 lb, PPRL 5897,39 lb , MPRL 1839,41 lb, maksimum strees 13342,51, mínimum strees 4161,57, strees allowable 24840,89, counter balance effect ideal 3868,41 lb, torsi maksimum 133344,44 in-lb, net lift pump 1796,33 hydraulic horse power 2,86 hp, friction horse power 2,86 hp, break horse power 7,74 hp.