bluuebunny/crossref_metadata_2025 huggingface dataset:
Citizen Stance towards Mandatory COVID-19 Vaccination and Vaccine Booster Doses: A Study in Colombia, El Salvador and Spain
Authors: Iguacel Isabel , Álvarez-Najar Juan Pablo , Vásquez Patricia del Carmen , Alarcón Judith , Orte María Ángeles , Samatán Eva , Martínez-Jarreta Begoña
Published: May 2022

The infections and deaths resulting from Coronavirus Disease 2019 (COVID-19) triggered the need for some governments to make COVID-19 vaccines mandatory. The present study aims to analyze the position of 3026 adults in Colombia, El Salvador, and Spain regarding the possibility of making COVID-19 vaccine mandatory and the intention to be vaccinated with the booster or possible successive doses. Data from an online survey conducted from August to December 2021 among a non-representative sample of Spanish-speaking countries were collected. Multinomial Logistic Regression Models were used. A total of 77.4% of Colombians were in favor of mandatory vaccination compared to 71.5% of Salvadorians and 65.4% of Spaniards (p < 0.000). Women and people over 65 years of age were the groups most in favor of making the vaccine mandatory (p < 0.000). A total of 79.4% said they had received a third dose or would intend to receive the third dose or future doses, if necessary, compared with 9.4% who expressed doubts and 9.9% who refused to be vaccinated or did not intend to be vaccinated. Among the measures that could be taken to motivate vaccination, 63.0% and 60.6% were in favor of requiring a negative test to enter any place of leisure or work, respectively, compared to 16.2% in favor of suspension from work without pay. The acceptance of mandatory vaccination and of third or future doses varies greatly according to sociodemographic characteristics and work environment. As such, it is recommended that policy makers adapt public health strategies accordingly.
Exploring the Perception of Additional Information Content in 360° 3D VR Video for Teaching and Learning
Authors: Allman Sarah A. , Cordy Joanna , Hall James P. , Kleanthous Victoria , Lander Elizabeth R.
Published: May 2022

360° 3D virtual reality (VR) video is used in education to bring immersive environments into a teaching space for learners to experience in a safe and controlled way. Within 360° 3D VR video, informational elements such as additional text, labelling and directions can be easily incorporated to augment such content. Despite this, the usefulness of this information for learners has not yet been determined. This article presents a study which aims to explore the usefulness of labelling and text within 360° stereoscopic 3D VR video content and how this contributes to the user experience. Postgraduate students from a university in the UK (n = 30) were invited to take part in the study to evaluate VR video content augmented with labels and summary text or neither of these elements. Interconnected themes associated with the user experience were identified from semi-structured interviews. From this, it was established that the incorporation of informational elements resulted in the expansion of the field of view experienced by participants. This “augmented signposting” may facilitate a greater spatial awareness of the virtual environment. Four recommendations for educators developing 360° stereoscopic 3D VR video content are presented.
Assessment of Climate and Catchment Control on Drought Propagation in the Tekeze River Basin, Ethiopia
Authors: Zeleke Ethiopia Bisrat , Melesse Assefa M. , Kidanewold Belete Berhanu
Published: May 2022

It is crucial to understand the development of hydrological drought which is unique to a sub-basin to derive management strategies that can address the cause. In this study, relationships between climate and catchment control against hydrological drought development in the Tekeze River Basin (TRB), Ethiopia, were assessed. The Water Evaluation and Planning (WEAP) modeling tool was selected to mimic the behavior and historical characteristics of the basin which was modeled for the period 1981 to 2018. The most severe drought events and historical drought years were selected and analyzed on a monthly basis, where the classical rainfall deficit drought was identified to be the most common typology within the basin. Once modeled, both meteorological and hydrological drought analyses were performed using the Threshold Level Method (TLM) where 168 months of meteorological drought with magnitudes as high as 110 mm/month and 60 months of streamflow anomalies with magnitudes of up to 17 mm/month were observed. While the temporal resolution impacts results pertaining to hydrological drought development, the analysis showed that the basin is fast responding, where storage characteristics did not play a significant role in delaying a hydrological drought onset. Compared to naturalized streamflow, the construction of the Tekeze Dam on the main river was indicative of an over 900% increase in dry season flows but a reduction of 23% of wet season flows, showing the potential to redistribute runoff in space and time.
Food Sources for Benthic Grazers in Trophic Networks of Macrophyte Habitats in a Transitional Baltic Ecosystem
Authors: Morkūnė Rasa , Bučas Martynas , Kataržytė Marija , Politi Tobia , Vaičiūtė Diana , Vizzini Salvatrice , Martin Georg
Published: May 2022

In this study, we provide insights into that characteristics of two sites representing different conditions of productivity and salinity impact on trophic network structures of macrophyte habitats and diet of benthic grazers at the active vegetation period in the Curonian Lagoon (southeastern Baltic Sea). Regarding the epiphytic growth, macrophytes were more overgrown in the relatively less productive (northern) site with a muddy bottom and more frequent marine water inflow than in the (southern) site with higher productivity and freshwater sandy habitat. Stable isotope analysis revealed that organisms’ samples from the northern site were more enriched with the heavier carbon isotopes, but depleted in the heavier nitrogen isotopes than those from the southern site. Gastropods and amphipods mainly consumed sedimentary organic matter in the southern site, while they grazed epiphytes together with sedimentary organic matter in the northern site. Although to a low extent, gastropods consumed more charophytes than pondweeds in the southern site. This study contributes to a better understanding of the functioning and structure of lagoonal systems, highlighting the importance, often overlooked, of the benthic compartment, which, however, may have a relevant influence on the productivity of the whole system.
Multi-Level Determinants of Acceptance in Centralized Pesticide Delivery among Farmers: Evidence from Huangshan City, China
Authors: Li Changxin , Jin Leshan
Published: May 2022

Highly toxic pesticides bring negative externalities to water pollution, which increase the demand for green pesticides that are low-toxic and high-efficiency. With the implementation of the unique the Centralized Pesticide Distribution (CPD) policy aiming to reduce the use of chemical pesticides in Huangshan, we try to explore the factors that affect farmers’ acceptance of CPD and thus change their pesticides selection. Based on the theory of farmers’ ecological rationality, we build a decision-making ecosystem on accepting CPD and assuming that farmers’ behavior is determined hierarchically by factors, then the Logistic-AISM model is used for empirical testing using data collected from 233 representative farmers. The results show that the proportion of agri-income and participation in cooperatives fundamentally affected choices for CPD acceptance through two middle-level indirect factor: government publicity and the availability of agri-information by changing farmers’ cognition on pesticides and production status. Thus, CPD may be improved by selling a richer variety of insecticides and implementing more publicity. Lessons from China inspire other intensive farming countries to promote green pesticides by: expanding the sales channel of green agri-products, playing the auxiliary role of cooperatives, and inventing more eco-friendly pesticides.
Performance Evaluation of Solar Still in Veracruz, Mexico Gulf Coastline
Authors: Feria-Díaz Jhon Jairo , López-Méndez María Cristina , Ortiz-Monterde Lucero , Médina-Salgado Boris A. , Perez-Rosas Norma C.
Published: May 2022

Access to freshwater for rural populations is increasingly difficult worldwide. Even in coastal regions with abundantly available seawater, this is not suitable to meet the population’s basic needs. Desalination with solar stills represents a simple, inexpensive, and accessible alternative to obtaining freshwater. This research shows the results obtained with a mathematical model of a single slope solar still proposed by Dunkle, compared with experimental data. Field experiments were carried out in the coastal zone of the Gulf of Mexico to validate the mathematical model. Different operating parameters of the solar still and their performance depending on climatic variations of the study site were studied. The average yield of distilled water was 1.57 L/m2 d.
Environmental Conditions along Tuna Larval Dispersion: Insights on the Spawning Habitat and Impact on Their Development Stages
Authors: Russo Stefania , Torri Marco , Patti Bernardo , Musco Marianna , Masullo Tiziana , Di Natale Marilena Vita , Sarà Gianluca , Cuttitta Angela
Published: May 2022

Estimated larval backward trajectories of three Tuna species, namely, Atlantic Bluefin Tuna (Thunnus thynnus, Linnaeus, 1758), Bullet Tuna (Auxis Rochei, Risso, 1801) and Albacore Tuna (Thunnus alalunga, Bonnaterre, 1788) in the central Mediterranean Sea, were used to characterize their spawning habitats, and to assess the impact of changes due to the major environmental parameters (i.e., sea surface temperature and chlorophyll-a concentration) on larval development during their advection by surface currents. We assumed that the environmental variability experienced by larvae along their paths may have influenced their development, also affecting their survival. Our results showed that the Tuna larvae underwent an accelerated growth in favorable environmental conditions, impacting on the notochord development. In addition, further updated information on spawning and larval retention habitats of Atlantic Bluefin Tuna, Bullet and Albacore Tunas in the central Mediterranean Sea were delivered.
Influence of Urbanization on Patterns of Variability of Mytilus galloprovincialis Populations
Authors: Veiga Puri , Moreira Juan , Sampaio Leandro , Rubal Marcos
Published: May 2022

Urbanization is currently one of the most widespread disturbances urgently requiring empirical data regarding its effects on coastal ecosystems. The aim of this study was to compare patterns of variability in populations of the Mediterranean mussel, Mytilus galloprovincialis, between urban and non-urban intertidal rocky shores, over a temporal scale of 12 months and multiple spatial scales (from cm to 10 s of km). For this, variance components associated with percentage cover, spat and total density, condition index, shell length and clump thickness of mussels were compared. Different patterns emerged depending on the response variable and the spatial and temporal scale. There was in general, a higher variability in urban than in non-urban shores, particularly for shell length, spat and total density that can be interpretated as a first stage of degradation, before noticing changes in mean values of these variables. Moreover, the most relevant scales of variability of total and spat density changed with urbanization (10 s of km in urban; 10 s of cm/m in non-urban). Results highlight the need for adopting proper management plans that should include the relevant spatial and temporal scales of variability; otherwise, they will fail in ameliorating urbanization effects on intertidal ecosystems.
Statistics in Hydrology
Authors: Chen Yuanfang , Wang Dong , Liu Dedi , Li Binquan , Sharma Ashish
Published: May 2022

Statistical methods have a long history in the analysis of hydrological data for designing, planning, infilling, forecasting, and specifying better models to assess scenarios of land use and climate change in catchments [...]
Role of Mine Tailings in the Spatio-Temporal Distribution of Phosphorus in River Water: The Case of B1 Dam Break in Brumadinho
Authors: Pissarra Teresa Cristina Tarlé , Costa Renata Cristina Araújo , Valle Junior Renato Farias do , Silva Maytê Maria Abreu Pires de Melo , Costa Adriana Monteiro da , Sanches Fernandes Luís Filipe , Carvalho de Melo Marília , Valera Carlos Alberto , Pacheco Fernando António Leal
Published: May 2022

Human actions in the drainage network of hydrographic basins interfere with the functioning of ecosystems, causing negative impacts on the environment. Among these impacts, mass loads with a high concentration of phosphorus (P) have a significant potential for point and diffuse pollution of freshwater. The objective of this work was to model P spatially in the Paraopeba River basin, namely in the main water course and 67 sub-basins, and temporally in the years of 2019, 2020, and 2021, after the rupture of B1 tailings dam of Vale, SA company in Brumadinho (Minas Gerais Brazil). The distribution of total phosphorus concentrations (Pt) in relation to environmental attributes (terrain slope, soil class, and land use) and stream flow was assessed with the help of SWAT, the well-known Soil and Water Assessment Tool, coupled with box-plot and cluster analyses. The Pt were obtained from 33 sampling points monitored on a weekly basis. Mean values varied from 0.02 to 1.1 mg/L and maximum from 0.2 to 15.9 mg/L across the basin. The modeling results exposed an impact on the quality of Paraopeba River water in a stretch extending 8.8–155.3 km from the B1 dam, related with the rupture. In this sector, if the contribution from the rupture could be isolated from the other sources, the average Pt would be 0.1 mg/L. The highest Pt (15.9 mg/L) was directly proportional to the urban area of a sub-basin intersecting the limits of Betim town and Belo Horizonte Metropolitan Region. In general, urban sprawl as well as forest-agriculture and forest-mining conversions showed a close relationship with increased Pt, as did sub-basins with a predominance of argisols and an accentuated slope (>20%). There were various moments presenting Pt above legal thresholds (e.g., >0.15 mg/L), mainly in the rainy season.
Assessment of the Habitat Quality of Offshore Area in Tongzhou Bay, China: Using Benthic Habitat Suitability and the InVEST Model
Authors: Zhang Haifeng , Li Sida , Liu Yun , Xu Min
Published: May 2022

Coastal zones, and in particular offshore areas, are coming under ever-increasing pressure from human development. Therefore, the evaluation of habitat quality is of vital importance for management of coastal zones. The InVEST model adopts a multi-module and multi-level design form, which has the advantages of strong visualization and fast calculation. As a result, this study used the InVEST-Habitat quality (HQ) model to assess the habitat quality of the Tongzhou Bay offshore area. Development activities were included in the classification of habitat types and the benthic habitat suitability index was used to describe the spatial variation in habitat quality of the offshore area. The results showed that the methodological approach mentioned above achieved a more detailed assessment of the spatial variation in habitat quality. The empirical model constructed based on the relationship between the Shannon–Weiner index and environmental factors performed well in revealing the suitability of habitat, with the regression equation showing an R2 of 0.57 and R2 of 0.5 significant at level of p < 0.05. The habitat suitability of Tongzhou Bay water was mainly influenced by aquaculture and industrial sea use. The habitat quality of Tongzhou Bay was relatively low due to disturbance by coastal development and a low water habitat suitability. The distribution of habitat quality in Tongzhou Bay was uneven and improved with the increase of the distance from the coast. Improvement of the habitat quality of Tongzhou Bay requires strict control of sea reclamation, optimization of the structure of offshore aquaculture, improvements to water quality and habitat suitability, and strengthening of the protection of areas of high habitat quality. This study provides a novel method for evaluating habitat quality of offshore areas.
Measurement of Agricultural Water and Land Resource System Vulnerability with Random Forest Model Implied by the Seagull Optimization Algorithm
Authors: Zhao Dan , Men Xiuli , Chen Xiangwei , Zhao Yikai , Han Yanlong
Published: May 2022

To evaluate the state of an agricultural development more comprehensively, a vulnerability assessment is introduced into agricultural water and land resources system, and it is expected that the vulnerability assessment can provide a basis for improving system structure and function and realizing sustainable development. In the study, 27 evaluation indicators are selected from the agricultural water and land resources system (AWLRS), socio-economic system and ecological structure system to construct the evaluation index system for agricultural water and land resource system vulnerability (AWLRSV). Seagull optimization algorithm (SOA) is used to calibrate the parameters of the random forest (RF) model. SOA-RF model is applied to measure the AWLRSV of Heilongjiang Province in China. The results show that the SOA-RF model has higher accuracy and stronger stability than the traditional RF model and DA-RF model. The value of AWLRSV in Heilongjiang Province presents a downward–upward–downward trend from 2008 to 2018. The vulnerability levels are mainly level II and III, and level III is mainly distributed northwest and southeast of Heilongjiang Province. The novelty of this paper is to regard the agricultural water and land resources system as a compound system, put forward the vulnerability assessment framework. The findings may provide reference for regional sustainable development from a new research perspective.
A Novel Surge Damping Method for Hydraulic Transients with Operating Pump Using an Optimized Valve Control Strategy
Authors: Cao Zheng , Xia Qi , Guo Xijian , Lu Lin , Deng Jianqiang
Published: May 2022

Hydraulic transients may pose a critical threat to process operation due to devastating surge waves. This paper investigates hydraulic surge and damping control associated with pipe flow modeling and valve optimization. A one-dimensional transient model was developed using the modified instantaneous accelerations-based (IAB) model, considering energy dissipation, referred to as the compression–expansion effect, which was then solved by the Method of Characteristics (MOC). Analogous to solving valve operation by means of the traveling salesman problem (TSP), a novel surge damping strategy was proposed by applying an improved artificial fish swarm algorithm (AFSA). After validating the unsteady model and the optimization algorithm, wave surge damping effectiveness was evaluated on the basis of case studies in different pump running scenarios. The results showed that the proposed nonlinear optimized control method was able to reduce surge amplitude by 9.3% and 11.4% in pipe systems with and without running centrifugal pump, respectively, and was able to achieve a 34% time margin or a maximal 75.2% surge reduction in the case of using an positive displacement pump. The optimized nonlinear valve closure presents different shapes in fast closing and slow closing situations. The strategy proposed in the present study is beneficial for guiding valve real-time control, as well as providing a reference for valve design for the purpose of wave surge protection.
Comparison of Effluent Suspended Solid Concentrations from Two Types of Rectangular Secondary Clarifiers
Authors: Lee Byonghi
Published: May 2022

Secondary clarifiers play a significant role in the successful operation of activated sludge systems. Because of the restriction of available land, South Korean domestic wastewater treatment plants tend to employ rectangular clarifiers to settle mixed liquor suspended solids (MLSS) for activated sludge systems. A high MLSS concentration must be maintained in the bioreactor to ensure nitrification during winters, and achieve stringent effluent quality. The effluent suspended solid (SS) concentrations of two clarifier types currently being used in South Korea, primary rectangular clarifier-type and Gould Type I secondary clarifiers, were compared using computerized fluid dynamic simulations and hourly secondary effluent suspended solid concentrations. In addition, operational data such as hourly influent flow, daily MLSS concentrations, and sludge volume index were obtained and reviewed. This comparison reveals that the Gould Type I secondary clarifier is resilient to loading variation and produces effluent with a consistently lower suspended solid concentration than the primary rectangular clarifier-type under similar loading conditions and higher loading variations. The results suggest that the existing primary rectangular clarifier-type secondary clarifiers must be converted to Gould Type I.
Identifying Characteristics of Guam’s Extreme Rainfalls Prior to Climate Change Assessment
Authors: Yeo Myeong-Ho , Pangelinan James , King Romina
Published: May 2022

Extreme rainfall and its consequential flooding account for a devastating amount of damage to the Pacific Islands. Having an improved understanding of extreme rainfall patterns can better inform stormwater managers about current and future flooding scenarios, so they can minimize potential damages and disruptions. In this study, the scaling invariant properties of annual maximum precipitations (AMPs) are used for describing the regional patterns of extreme rainfalls over Guam. AMPs are calculated at seven stations in Guam and exhibit distinct simple scaling behavior for two different time frames: (1) from 15 min to 45 min; and (2) from 45 min to 24 h. With these two different behaviors, the conventional estimation methods for sub-hourly durations overestimate the frequencies at a site in which breakpoints are clearly observed, while the proposed Scaling Generalized Extreme Value (GEV) method, based on the Scaling Three-NCM (S3NCM) method, provides comparable estimates. A new regional extreme rainfall analysis approach based on scaling exponents is introduced in this study. Results show distinct extreme rainfall patterns over Guam. Moreover, the numerical and graphical analyses identify that a tropical cyclone may increase daily AMPs by 3%, on average.
Effects of Different Irrigation Modes on the Growth, Physiology, Farmland Microclimate Characteristics, and Yield of Cotton in an Oasis
Authors: Sun Kai , Niu Jingran , Wang Chunxia , Fu Qiuping , Yang Guang , Liang Fei , Wang Yaqin
Published: May 2022

In order to determine the effects of different water-saving irrigation techniques on physiological growth, farmland microclimate, and yield of cotton (Gossypium Spp.), a two-year field experiment was carried out in an oasis area of Northwest China, and three irrigation methods were tested, including on-film irrigation (T1), under-film drip irrigation (T2), and automatic irrigation (T3). The results showed that the relative humidity, plant height, leaf area, stem thick, and photosynthetic index with the T3 treatment were significantly higher than those with T2 and T1. The air and soil temperature with T3 (except seedling stage) were considerably lower than those with T2 and T1. According to the fitting and statistical analysis of each index and yield, except for air and soil temperature, the other indices were positively correlated with yield. Based on the analysis of each index, the T3 treatment had the most significant regulatory effect on cotton’s physiological growth and farmland microclimate. Compared with T1, the irrigation amounts of T2 and T3 decreased by 16.43% and 25.90%, but the yield increased by 38.96% and 46.28%, respectively. The automatic irrigation strategy showed significant advantages in water saving and yield increase, which could provide some reference for cotton drip irrigation in similarly arid areas.
Riverine Inputs Impact the Diversity and Population Structure of Heterotrophic Fungus-like Protists and Bacterioplankton in the Coastal Waters of the South China Sea
Authors: Wang Suisui , Sen Kalyani , He Yaodong , Bai Mohan , Wang Guangyi
Published: May 2022

Labyrinthulomycetes protists (LP) play an important role in ocean carbon cycling with an ubiquitous presence in marine ecosystems. As one of the most important environmental factors, salinity is known to regulate their diverse metabolic activities. However, impacts of salinity gradient on their distribution and ecological functions in natural habitats remain largely unknown. In this study, the dynamics of LP abundance and community structure were examined in the surface water of plume, offshore, and pelagic habitats in the South China Sea (SCS). The highest (5.59 × 105 copies L−1) and lowest (5.28 × 104 copies L−1) abundance of LP were found to occur in the waters of plume and pelagic habitats, respectively. Multiple dimensional scaling (MDS) analysis revealed a strong relationship between salinity and LP community variation (p < 0.05, rho = 0.67). Unexpectedly, relative low LP diversity was detected in the brackish water samples of the plume. Moreover, our results indicated the genus Aplanochytrium dominated LP communities in offshore and pelagic, while Aurantiochytrium and Ulkenia were common in the plume. Physiological and metabolic features of these genera suggested that LP ecological functions were also largely varied along this salinity gradient. Clearly, the salinity gradient likely regulates the diversity and functional partitioning of marine protistan micro-eukaryotes in the world’s oceans.
Power to Hydrogen and Power to Water Using Wind Energy
Authors: Bertsiou Maria Margarita , Baltas Evangelos
Published: May 2022

The need for energy and water security on islands has led to an increase in the use of wind power. However, the intermittent nature of wind generation means it needs to be coupled with a storage system. Motivated by this, two different models of surplus energy storage systems are investigated in this paper. In both models, renewable wind energy is provided by a wind farm. In the first model, a pumped hydro storage system (PHS) is used for surplus energy storage, while in the second scenario, a hybrid pumped hydrogen storage system (HPHS) is applied, consisting of a PHS and a hydrogen storage system. The goal of this study is to compare the single and the hybrid storage system to fulfill the energy requirements of the island’s electricity load and desalination demands for domestic and irrigation water. The cost of energy (COE) is 0.287 EUR/kWh for PHS and 0.360 EUR/kWh for HPHS, while the loss of load probability (LOLP) is 22.65% for PHS and 19.47% for HPHS. Sensitivity analysis shows that wind speed is the key parameter that most affects COE, cost of water (COW) and LOLP indices, while temperature affects the results the least.
Aplikasi Berbasis Web Deteksi Undertone Menggunakan Metode Agile Untuk Rekomendasi Makeup
Authors: Parameswari Sang Dara , Prasetyo Novian Adi , Junaidi Apri
Published: May 2022

Berpenampilan menarik adalah keharus bagi kaum perempuan, agar wajah bisa terlihat indah dan menawan dibutuhkan sebuah makeup. Saat ini perempuan yang mengenal berbagai jenis makeup, kosmetik yang dibutuhkan dalam makeup seperti pensil alis, maskara, foundation, lipstik, bedak dan lain sebagainya. Pemilihan shade pada foundation masih menjadi kesulitan bagi para perempuan, hal tersebut dapat membuat warna kulit jadi terlihat berbeda sehinga membuat perempuan merasa insecure atau tidak percaya diri. Tiga jenis udertone yaitu warm, cool dan neutral. Cara manual untuk mengetahun jenis undertone untuk melihat warna urat nadi pada tangan, namun terkadang dengan melakukan cara manual perempuan masih kesulitan untuk menentukan jenis undertone yang dimiliki. Oleh karena itu, dengan semakin berkembangnya zaman, diperlukannya sebuah aplikasi untuk mempermudah perempuan dalam mengetahui jenis undertone dan mendapatkan rekomendasi makeup. Metode agile digunakan untuk pengembangan aplikasi karena berfokus pada penanganan perubahan sesuai kebutuhan pengguna dan kecepatan.  Deteksi undertone diimplementasikan sebagai aplikasi berbasis website yang dibangun menggunakan metode Agile. Metode Agile berhasil diterapkan pada penelitian ini dengan hasil berupa aplikasi deteksi Undertone, keberhasilan tersebut diukur menggunakan pengujian blackbox dengan menunjukan hasil semua fitur berjalan dengan baik sesuai dengan kebutuhan pengguna.
Implementasi Item Response Theory Model Three-Parameter Logistics Pada Aplikasi Computerized Adaptive Test
Authors: Maulani Muhammad Ruslan , Supriady Supriady
Published: May 2022

Paper and Pencils Test (PPTs) merupakan ujian yang memberikan pertanyaan dengan tingkat kesulitan yang sama kepada peserta ujian. Akibatnya, tes menjadi lebih lama dan pertanyaan yang diberikan tidak informatif sehingga peserta ujian merasa kesulitan atau merasa terlalu mudah dalam mengerjakannya. Tujuan dari penelitian ini yaitu membuat aplikasi sistem ujian berbasis komputer yang dapat mengukur kemampuan peserta tes, dimana tingkat kesukaran butir soal disesuaikan dengan tingkat kemampuan dari peserta tes. Metode penelitian yang dilakukan dalam penelitian ini terdiri dari beberapa tahap, yaitu: tahap persiapan, tahap analisis dan perancangan, tahap implementasi dan pengujian, serta tahap pelaporan. Sedangkan metode yang digunakan untuk melakukan proses estimasi terhadap butir soal dengan menggunakan metode Maximum Likelihood Estimation (MLE) dan metode yang digunakan untuk sistem Computerized Adaptive Test (CAT) yaitu metode Item Response Theory (IRT) model logistik three parameter logistic (3PL). Hasil dari penelitian ini yaitu aplikasi sistem CAT berbasis web yang dapat dijadikan sebagai sistem ujian online dan alat ukur untuk menentukan kemampuan (ability) peserta ujian
Implementasi Aplikasi Bantuan Cepat Daring untuk Peningkatan Layanan TIK di Universitas Jambi
Authors: Aryani Reni , Marzal Jefri , Weni Indra
Published: May 2022

Universitas Jambi (UNJA) telah menerapkan berbagai layanan berbasis teknologi informasi dan komunikasi (TIK). Dalam rangka peningkatan pelayanan berbasis TIK, UNJA berupaya selalu melakukan berbagai transformasi digital dalam rangka pemutakhiran proses operasional institusi. Namun ketika banyak pertanyaan atau keluhan dari civitas akademika (mahasiswa, dosen, dan staf) mengenai berbagai hal, UNJA masih melakukan proses yang konvensional untuk menjawab semua keluhan dan pertanyaan tersebut. Sebagai contoh ketika ada dosen/mahasiswa yang memiliki masalah pada SIAKADnya, mereka harus datang ke Lembaga Pengembangan Teknologi Informasi dan Komunikasi selaku unit kerja yang melakukan pengelolaan terhadap berbagai sistem aplikasi di UNJA, dan disana layanan tersebut ditangani secara manual oleh staf yang bertugas. Permasalahan ini menyebabkan lambatnya akses layanan dan respon yang diberikan oleh petugas. Untuk itu diperlukan sebuah aplikasi yang dapat menampung seluruh keluhan dan masalah yang dimiliki oleh civitas akademika. Metodologi yang digunakan dalam pengembangan aplikasi ini ialah metode waterfall yang terdiri dari tahap perencanaan, analisis, desain, implementasi, pengujian dan integrasi. Framework yang digunakan dalam pengembangan aplikasi ini ialah Framework Laravel. Hasil dari kegiatan penelitian ini adalah adanya Aplikasi Bantuan Cepat Daring (ABCD) Universitas Jambi, yang dapat memberikan layanan informasi secara online. Aplikasi ini dapat memudahkan dan mampercepat proses pemberian layanan informasi di UNJA
Aplikasi Pemilihan Vendor Menggunakan Metode Fuzzy AHP Dan TOPSIS
Authors: Nisa Khoirun
Published: May 2022

Pemilihan vendor yang tepat merupakan hal yang sangat penting dalam menjalankan proses bisnis. Perusahaan perlu mempertimbangkan faktor-faktor penting dalam memilih vendor yang tepat. Penawaran harga yang rendah sudah tidak efisien lagi dalam pemilihan vendor saat ini. Pada penelitian ini kombinasi Fuzzy AHP dan TOPSIS akan digunakan dalam pemilihan vendor pada salah satu perusahaan sales dan distribusi di Jakarta. Dalam penelitian  ini  TOPSIS  digunakan  untuk melakukan  perankingan  alternatif  berdasarkan kriteria  yang  ditetapkan  yang  telah  dihitung  nilai bobotnya  menggunakan  metode Fuzzy AHP. Bobot preferensi masing-masing kriteria yang dihasilkan oleh dan Fuzzy AHP adalah sebesar 0.453718 untuk harga, 0.01616 untuk kriteria jumlah teknisi professional, 0.144174 untuk kriteria metodologi pelaksanan pekerjaan dan 0.385948 untuk kriteria pengalaman perusahaan. Perangkingan yang dihasilkan TOPSIS adalah PT. Nusa Network Prakarsa pada urutan pertama, PT. Mitra Integrasi Informatika pada urutan kedua dan PT. Iproteksi Telematika pada urutan ketiga. Setelah hasil perankingan diketahui dilakukan evaluasi terhadap hubungan masing-masing kriteria dengan hasil akhir TOPSIS dengan menghitung nilai korelasi Pearson. Setelah itu hasil akhir TOPSIS dan hasil ranking dihitung korelasinya untuk mengetahui seberapa kuat hubungan semua atribut atau kriteria terhadap hasil perankingan.
Analisis Kinerja Sistem Informasi Pada Kribo.Id dengan Metode IT Balanced Scorecard
Authors: Aryani Lies , Andrianti Ari , Astri Lola Yorita , Rohaini Eni
Published: May 2022

Kribo.id merupakan salah satu usaha yang bergerak dibidang penjualan sayur dan pangan secara online. Sesuai dengan namanya Kribo.id telah memanfaatkan teknologi informasi dalam menjalankan kegiatan operasional dan melayani konsumennya. Penerapan sistem informasi di Kribo.id belum pernah dilakukan pengukuran terhadap kinerja teknologi informasi yang ada. Terdapat banyak metode untuk melakukan pengukuran suatu kinerja, salah satunya adalah metode IT Balanced Scorecard. Penggunaan metode ini dikarenakan metode ini dapat memberikan gambaran kinerja sistem informasi berdasarkan empat perspektif yaitu perspektif kontribusi perusahaan, perspektif orientasi pengguna, perspektif penyempurnaan operasional dan perspektif orientasi masa depan. Tujuan penelitian ini adalah melakukan pengukuran kinerja sistem informasi pada Kribo.id menggunakan IT Balanced Scorecard dan membuat rekomendasi perbaikan terhadap kinerja sistem informasi sesuai dengan hasil pengukuran yang dilakukan. Hasil penelitian menunjukkan bahwa Kribo.id pada keempat perspektif berkategori cukup.
Implementasi Algoritma Apriori untuk Mendapatkan Pola Kelulusan Mahasiswa
Authors: Anas Azwar , Zebua Ade Jermawinsyah
Published: May 2022

Data transactions that occur every day will become chunks of data in an institution's database. These chunks of data have no value if mining is not carried out in obtaining interesting knowledge and information. The purpose of this study was to analyze chunks of graduation data for STIE-Graha Karya Muara Bulian students, in order to obtain patterns formed from predetermined variables. The method used is the Apriori Algorithm. This is in accordance with the main function of this algorithm, which is to analyze the frequent itemset. The results showed that for the 2-itemset data the highest support value was the combination of Female Gender and Work with a value of 34%, while the highest confidence value was in the combination of a Grade Point Average above 3.5 and Work with a score of 85%. As for the 3-itemset, the highest support value is in the combination if the GPA is above 3.5, gender is female and the work status reaches 14% and confidence is 90%.
Prototype Sistem Informasi Manajemen Stok Berbasis Web Pada Toko Jasmine
Authors: Masgo Masgo , Santoso Santoso
Published: May 2022

Abstract

 

Jasmine shop is one of the shops in Jambi city that sells merchandise such as sheets, bed covers and pillowcases. In carrying out transactions for recording and managing stock of goods, they want to switch to a web-based computer application system, which so far still uses manual recording with books. So that problems often occur in the form of: recording errors, errors in reporting stock items and the manual book is damaged so that it is difficult to know the old records and with the manual system the work becomes less effective and efficient. This study aims to design a web-based stock management information system. So that employees in recording, reporting and managing stock items can be done precisely and accurately. In this study, only a prototype of an information system was produced to be tested and could be further developed in the future. The methods used in this research are: field research, literature study, system requirements analysis, system modeling and system prototype. By designing a prototype system, it is expected that data processing can produce precise and accurate information so that it can assist superiors in making decisions and minimize data input errors.

 

Keywords : information system, stock management, prototype, web

 

Abstrak

 

Toko Jasmine adalah salah satu toko yang berada di kota Jambi yang menjual barang dagangan sprai, bedcover dan sarung bantal. Dalam melakukan transaksi pencataan dan manajemen stok barang ingin beralih ke sistem aplikasi komputer berbasis web, yang mana selama ini masih menggunakan pencataan manual dengan buku. Sehingga sering terjadi permasalahan berupa : kesalahan pencatatan, kesalahan laporan stok barang dan buku manual tersebut rusak sehingga kesulitan mengetahui pencatatan lama dan dengan sistem manual pekerjaan menjadi kurang efektif dan efesien. Penelitian ini bertujuan untuk merancang sistem informasi manajemen stok yang berbasis web.  Sehingga karyawan dalam melakukan pencatatan, laporan dan mengelola stok barang dapat dilakukan dengan tepat dan akurat. Dalam penelitian ini hanya menghasilan prototype sistem informasi untuk dapat diujicoba dan dapat lebih dikembangkan dikemudian hari. Metode yang digunakan dalam penelitian ini berupa : penelitian lapangan, studi literatur, analisa kebutuhan sistem, pemodelan sistem dan prototype sistem. Dengan perancangan prototype sistem ini diharapkan dalam pengolahan data agar dapat menghasilkan informasi yang tepat dan akurat sehingga dapat membantu atasan dalam mengambil keputusan serta meminimalisir kesalahan input data.

 

Kata kunci : sistem informasi , manajemen stok, prototype, web
Gambaran Model Pemberdayaan Penyandang Prediabetes di Wilayah Kerja Puskesmas Cimahi Utara Kota Cimahi Tahun 2011
Authors: Rumahorbo Hotma , Karjatin Atin , Rahmat Mamat
Published: May 2022

ABSTRAK : Prediabetes merupakan prakondisi Diabetes dengan risiko absolut DMT2 sebesar 2-10kali. Diabetes merupakan faktor risiko penyakit Jantung dan Stroke yang merupakan penyebab utamakematian di Indonesia. Diabetes dapat dicegah dengan memperbaiki pola makan dan pola latihan fisikpenyandang Prediabetes. Penelitian bertujuan untuk memperoleh gambaran model pemberdayaanpenyandang Prediabetes yang dapat memperbaiki pola makan dan pola latihan fisik di Wilayah kerjaPuskesmas Cimahi Utara, Kota Cimahi Tahun 2011.Jenis dan disain penelitian adalah studi kualitatifdengan disain fenomenologi. Responden berjumlah 18 orang, terdiri dari penyandang prediabetes,kader, perawat, kepala puskesmas dan kasie p2p. Pengumpulan data dilakukan dengan carawawancara mendalam dan diskusi kelompok terfokus dan pengolahan dan analisis datamenggunakan pendekatan Collazii. Hasil penelitian menunjukkan belum dijumpai modelpemberdayaan yang sedang atau yang akan digunakan dalam meningkatkan pola makan dan polalatihan fisik penyandang prediabetes. Kegiatan pengendalian penyakit prediabetes baru pada tahapdeteksi faktor risiko dengan skrining glukosa darah pada penduduk yang berusia diatas 18 tahun.Direkomendasikan agar dikembangkan model pemberdayaan pasien prediabetes yang sesuai dengansituasi dan kondisi sumber daya yang ada di masyarakat serta melibatkan masyarakat secaramaksimal.
Thesis Review: Dis/identifications and Dis/articulations: Young Women and Feminism in Aotearoa/New Zealand
Authors: Connor Helene
Published: May 2022

In this thoroughly researched, skillfully written thesis, the author explores young women’s dis/identifications with feminism, and dis/articulations of feminism, within contemporary Aotearoa/New Zealand. The premise of the research is that whilst many young women value the work of the early feminists in terms of gender equality and individual freedom for themselves, only a small number position themselves as feminist. Indeed, the author identified research with young women in the United Kingdom, the United States, Germany and Canada which supported this premise. Comparative research on young women’s identifications with feminism in Aotearoa/New Zealand, was, however, absent within the literature and this thesis set out to address this gap. Overall, the thesis addresses the New Zealand context with considerable scholarly integrity and depth, demonstrating originality and a well-considered analytical response to the data.
Thesis Review: The Manifestation of Race in Everyday Communication Interactions in New Zealand
Authors: Henson Donna
Published: May 2022

This thesis presents an interesting and thoughtful autoethnographic inquiry into the manifestation of race in everyday communication interactions in New Zealand. An uncommon choice of both topic and method in the local communication disciplinary context, Revell presents a partial collaborative autoethnographic approach to the study that entails the reflexive analysis of qualitative data drawn from solicited participant diaries, semi-structured interviews, and focus groups. The resultant thesis presents a methodologically compelling and theoretically significant contribution to the field of communication research generally, and the discussion of race in the local context specifically.
Thesis Review: Evaluating the Impact of Social Change Catalyst on Urban Community Development: A Case Study of LIN Centre for Community Development in Ho Chi Minh City, Vietnam by Chau Doan-Bao
Authors: Ayallo Irene
Published: May 2022

In this thesis, the author evaluates the impact of the Listen – Inspire – Nurture (LIN) Center’s model of participatory urban community development in Ho Chi Minh City (HCMC). It evidences how LIN has supported urban not-for-profit organisations (NPOs) to alter their self-perception from ‘charity organisations’ to being part of community development processes. Using a participatory communication approach, LIN has encouraged dialogue with and among stakeholders and provided robust information to the community. Consequently, NPOs have become more confident in their own capacities and have more stable financial support. In addition, the corporate sector has a better understanding of the not-for-profit sector and is making a stronger contribution to the development of NPOs in HCMC. These outcomes contribute to effective and sustainable community development in HCMC.
نمذجة العلاقة بين إدراك جودة الخدمة ورضا الزبون دراسة ميدانية على زبائن شركة موبيليس بالأغواط (الجزائر)
Authors: Naidjat Abdelhamid
Published: May 2022

تعتبر جودة الخدمة في قطاع الاتصالات من أهم المعايير والأصول لتقييم الزبائن وإرضائهم، وبالتالي زيادة ولاءهم وزيادة متوسط معدل الاحتفاظ بهم، حيث نجد من بين محددات جودة الخدمة الأشياء الملموسة، الاعتمادية، الاستجابة، الاطمئنان والتعاطف، والتي تلعب دورا محوريا في رضا الزبائن. وتشير البحوث السابقة إلى أن تصورات الزبائن وتوقعاتهم أكثر احتمالا أن تكون مختلفة عبر قطاعات الخدمات، وبالتالي تبحث هذه الورقة في تأثير محددات جودة الخدمة على درجة رضا الزبائن بوكالة شركة موبيليس بالأغواط (عينة من 382 زبون) من خلال نموذج أداء الخدمة (SERVPERF).
الجرائم الالكترونية من خلال مؤشرات عالمية وآثارها على المؤسسات
Authors: Wahiba Abedalrahim , Bensaid Amin , Abedelrahim Nadia
Published: May 2022

للجرائم الالكترونية آثارا سلبية على الاقتصاد وبشكل مباشر على الشركات خاصة المؤسسات المصرفية حيث أنها الأكثر عرضة لهذا النوع من الجرائم، ويرجع ذلك كون النقود هي السلعة التي تتعامل بها هذه المؤسسات، وقد سببت الجرائم الالكترونية خسائر مالية فادحة سنويا لهذه الشركات بالإضافة إلى خسارة الثقة التي يضعها فيها الزبائن. وهكذا أصبحت الجرائم الالكترونية حجر عقبة أمام نمو وازدهار المؤسسات وجذب أكبر عدد ممكن من الزبائن وكسب ثقتهم، وتفاقمت المشكلة أكثر فأكثر على الرغم من الأساليب الأمنية المتطورة وأحدث التقنيات المستخدمة، والتقارير العالمية التي تصدرها الهيئات المتخصصة توضح حجم المشكلة في مختلف أنحاء العالم وتؤكد أن الولايات المتحدة هي الأكثر تضررا بشكل مستمر.
ما الذي يقود سعر النفط الخام؟ تحليل للمحددات والعوامل المسببة للصدمات
Authors: Boukheroufa Abedelslam , Bellaouar Sulaiman
Published: May 2022

منذ سبعينيات القرن الماضي، أصبح سعر النفط شديد التقلب، ويتميز بحالة من عدم اليقين حول مساراته. في هذه الورقة نحاول إعادة النظر في الأسباب الحقيقية التي كانت وراء أهم الصدمات، من خلال تحليل العوامل الأساسية وهي: الطلب والعرض، والعوامل الأخرى التي من المرجح أنها ساهمت في بعض الصدمات وهي: المضاربة المالية؛ والمضاربة في السوق المادي؛ والمخزونات. وذلك من خلال تحليل بيانات هذه العوامل وتتبع تزامن التغيرات التي حدثت فيها مع التغيرات في السعر، وبالاستعانة بمسح لنتائج وآراء الأدبيات. توصلنا إلى أن صدمات العرض تؤثر على سعر النفط، ولكن، في حالة ما إذا كان الطلب ينمو بمعدل مستمر وثابت نسبيا. ولا يمكن القول إن العرض أو الطلب هو المحدد الرئيسي، وإنما سعر النفط يتحدد من خلال تفاعل كل من قوى العرض والطلب كغيره من أسعار السلع الأخرى. العوامل الأخرى يمكن أن يكون لها أثر غير مباشر على السعر، بحيث تساهم في زيادة حدة بعض الصدمات، ليس كعامل جديد مستقل، ولكن من خلال تأثيرها على العرض والطلب.
الإفصاح المحاسبي في النظام المحاسبي المالي وبورصة الجزائر
Authors: Garaddi Abedlkader
Published: May 2022

يهدف النظام المحاسبي المالي إلى تقريب الممارسة المحاسبية في الجزائر مع الممارسات المحاسبية الدولية التي تسعى إلى تحقيق متطلبات الأسواق المالية وذلك بتوفير المعلومات المالية الملائمة للمستثمرين لاتخاذ قراراتهم المالية. وبورصة الجزائر كأي بورصة أخرى في العالم تحتاج لتوفير معلومات مالية ذات مصداقية وجودة، ولا يتحقق ذلك إلا بفرض قواعد تضبط الإفصاح والشفافية عن المعلومات المالية الخاصة بالمؤسسات المدرجة في البورصة وذلك لزيادة ثقة المستثمرين وتعاملاتهم وصولا إلى تحقيق كفاءة السوق. توصلت الدراسة أن الإفصاح المحاسبي في ظل تطبيق النظام المحاسبي يوفر معلومات مالية تتميز بالملائمة والشفافية مما يزيد في مصداقيتها، حيث ينعكس ذلك على زيادة فعالية أداء البورصة.
قياس رأس المال البشري –قياس ما لا يمكن قياسه-
Authors: Aboud Souad
Published: May 2022

بالنظر إلى الدور الاستراتيجي الهام الذي أصبح يحتله رأس المال البشري في نجاح المؤسسة وتميزها، تزايد الاهتمام به أكثر من خلال البحث في طرق قياسه، لمعرفة القيمة الاقتصادية للموارد البشرية، ومن ثم إدراج معلومات رقمية عنها في القوائم المالية للمؤسسة، وتسجيلها والتعامل معها كباقي الاصول الاخرى التي تدخل في حيازة المؤسسة.
دور حاضنات الأعمال في دعم البحث العلمي -دراسة حالة الجزائر-
Authors: Khouani Leila , Choaib Baghdad
Published: May 2022

يتلخص دور الجامعة في التعليم العالي والبحث العلمي، فعلاوة على هذه المهمة التقليدية أصبحت الجامعة تمثل دور فاعل في استثمار مخرجات الجامعة عن طريق إنشاء حاضنات بحثية تقام داخل مؤسسات التعليم العالي من جامعات ومعاهد، للاستفادة من خدمات الخبراء والبحوث المقدمة من طرف الأساتذة والطلبة.  تعمل هذه الحاضنات على تجسيد الإبداعات والابتكارات لتطوير أفكار، وأبحاث، وتصميمات الأساتذة، والباحثين بالاستفادة من الورش والمخابر المتوفرة بالجامعة. تتجلى مهمة هذه الورقة البحثية في إبراز دور حاضنات الأعمال في استيعاب أصحاب الإنتاج الفكري وعلاقتهم بالبحث العلمي والجامعة.
دراسة تحليلية للدور التنموي للمؤسسات الصغيرة والمتوسطة في الجزائر (2000-2017)
Authors: Zouake Alhouass , Ferhat Abbas
Published: May 2022

عرفت الجزائر جهودا كثيرة لتطوير المؤسسات الصغيرة والمتوسطة، وتوسع نطاق هذه الجهود ليشمل المستوى التشريعي والتنظيمي، فضلا عن اعتماد عدة سياسات لتعزيز مساهمة هذه المؤسسات في التنمية الاقتصادية والاجتماعية، لذا تهدف هذه الدراسة إلى التعرف على ثمار هذه الجهود من خلال رصد تطور هذه المؤسسات من جهة، وإبراز تأثير هذا التطور على دورها الاقتصادي والاجتماعي من جهة أخرى
قاعدة الاستثمار الأجنبي 51-49 في الجزائر بين إلزامية التبنّي والمطالبة بالتخلّي
Authors: Djabbar Souad , Lebik Mohamed bachir
Published: May 2022

اتّخذت الجزائر من خلال قاعدة 51-49 % التي جاء بها قانون المالية التكميلي لسنة 2009 موقفا حذرا من الاستثمار الأجنبي، إذ اعتبرها بعض المستثمرين وخاصة الأجانب أنّها تعيق تدفّقه إلى الجزائر، غير أنّ الدولة تعتبره أمرا لا نقاش فيه ويتعلّق بالسيادة الوطنية. سنحاول في هذه الورقة استعراض مختلف المواقف من تطبيق قاعدة 51-49 والتي تنقسم إلى ثلاث: هناك من يرفضها تماما ويدعوا للانفتاح التام على الاستثمارات الأجنبية، من يؤيّدها تماما باعتبارها تحفظ سيادة الدولة وتعزّز من حضورها الاقتصادي في اقتصاد هش مثل اقتصاد الجزائر، وآخرون لديهم موقف وسطي ينادون بتحديد القطاعات والمشاريع التي تخضع لهذه القاعدة بُغية تشجيع الاستثمار الأجنبي.