bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prevalence of helminth parasites in some commercially important fish species of River Anambra, Nigeria
Authors: Nwadike C. C. , Ilozumba P. C. O. , Amaechi E. C. , Okeke O. A. , Nnatuanya, I. O. , Okeke J. J. , Afoemezie P. I. , Udeh, N. P. 
Published: March 2024

The demand for fish as a source of protein is on the increase. However, sustainable productivity by fish farmers is constrained by parasitic infections. Thus, an investigation was conducted on the prevalence of helminth parasites in some commercially important fish species of River Anambra, Nigeria. A total of 521 fishes belonging to 6 families (Claroteidae, Synodontidae, Mormyridae, Osteoglossidae, Bagridae, and Clariidae) and 20 species caught with hooks, nets, and local traps were examined using standard parasitological techniques. The overall prevalence was 23.80%. Fish samples belonging to 6 families had the following prevalence of infection: Bagridae (0.00%), Clariidae (2.11 %), Claroteidae (1.53%), Mormyridae (0.0%), Osteoglossidae (14.97%) and Synodontidae (5.18%). Helminth parasites recovered were: Weyonia species (4.65%), Weyonia youdeowii (15.97%), Weyonia synodontis (3.33%), Sandonella sandoni (37.41%), Polyonchobothrium clarias (17.98 %), Plerocercoid larva (13.33%) and unidentified cestode (35.47%) (Cestoda); Emoleptalea species (4.65%) (Trematoda); Procamallanus laeviconchus (2.72%), Dujardinascaris species (1.36%), Spirocamallanus species (3.99%) (Nematoda); Neoechinorhynchus species (24.61%), Tenuisentis niloticus (34.62%) and unidentified acanthocephalan (6.25%) (Acanthocephala). Weyonia species, Weyonia youdeoweii, and W. synodontis were recovered from synodontids only. Acanthocephalan, cestodes, nematodes and trematodes were found in decreasing order of abundance. The presence of trematode Emoleptalea sp in Clarias gariepinus is a new host record of the parasite for the geographical area.
THE EEFECT OF SMARTPHONE ON STUDENTS’ SPEAKING SKILLS
Authors: Amaliah Amaliah 
Published: March 2024

The aim of this research is to find out the Effect of Smartphone on Students’ Speaking Skill. The research design was used pre-experimental research with one group pre-test and post-test. This research was conducted at SMP Negeri 3 Bissappu. The researcher was used total sampling technique. The researcher uses this technique because all the members of the selected had similar characteristic and the same relatively baseline knowledge based on their test examination average scores. The total number of samples was 30 students from class VII. The Speaking tests were administered in the pretest and posttest. The instrument was intended to measure the students’ enrichment of speaking. The test Speaking aspects in this research are: fluency, vocabulary, pronunciation, accuracy and comprehensibility. Based on the research findings and discussion in the previous chapter, the researcher concludes that the use of Smartphone enriches the students’ speaking skill; it is proved by the mean score of the students’ posttest. The t-test of the students’ speaking achievement in posttest was smaller than ? (0.000 < 0.05). It meant that the H1 of the hypothesis was accepted
EMPLOYING QAR STRATEGY TO IMPROVE STUDENTS’ READING COMPREHENSION
Authors: Hendri Jon 
Published: March 2024

The objectives of the research was to see how Question Answer Relationship (QAR) strategy assisted students to improve their reading comprehension and describe the situation when Question Answer Relationship (QAR) strategy was employed in the reading class. The researcher was applied pre experimental design. The population was the Second Grade Students of SMPN ciptodadi in 2021/2022 Academic Year. The total number of population is 30 students. The researcher was used purposive sampling technique. relatively baseline knowledge based on their test examination average scores. The total number of sample was 30 students from class. In analyzing the numerical data, the writer was used SPSS for windows. After implementing the research, the researcher concludes that The use of Question Answer Relationship (QAR) strategy in teaching reading enriches the students’ reading comprehension; it is proved by the mean score of the students’ posttest. The t-test of the students’ reading achievement in posttest was smaller than ? (0.000 < 0.05). It meant that the H1 of the hypothesis was accepted
THE EFFECT OF INTEGRATIVE LEARNING MODEL TYPE NETWORKED IN LISTENING
Authors: Kaharuddin Kaharuddin 
Published: March 2024

The aim of this research is to identify the effectiveness of the Networked Type Integrative Learning Model in Listening for Class VII Students at UPT SMPN 8 Bangkala Barat, Kab. Jeneponto. The researcher was applied pre-experimental design the population is the first-grade students of UPT SMPN 8 Bangkala Barat, Kab. Jeneponto in academic year 2021/2022. In analyzing the numerical data, the writer was used SPSS for windows. Based on the discussion above, we can conclude that There is an influence of the networked type of integrative learning model on the results of the listening ability of Class VII UPT SMPN 8 Bangkala Barat, Kab. Jeneponto. This can be seen from the research results above that the p-value from the pretest and posttest is lower than ? (0.000<0.05) and the degree of freedom is 22. The t-test value from the pretest and posttest can be concluded that there is a significant difference. This shows that the alternative hypothesis (H1) is accepted and, of course, the null hypothesis (H0) is rejected. This shows that the application of the networked type of integrative learning model to Class VII students at UPT SMPN 8 Bangkala Barat, Kab. Jeneponto can improve students' listening skills
Caracterización de las mujeres emprendedoras sociales de los municipios cordilleranos del departamento del Quindío, Colombia
Authors: Millán Chica Arcesio 
Published: March 2024

El objeto de la presente investigación estuvo orientado a la determinación de los factores que inciden en el emprendimiento social de las mujeres de los municipios cordilleranos del Quindío, a partir de factores culturales, sociales y económicos que hacen parte del entorno de emprendimiento. De esta forma, se logró identificar el impacto en la intención emprendedora y las características propias de las mujeres emprendedoras y, por ende, nuevas formas de incentivar y apoyar estos emprendimientos, de tal manera que se aporte al fortalecimiento de la dinámica empresarial de la región, en especial, de la zona cordillerana del departamento, además de desarrollar una cultura emprendedora que pueda generar a la población estabilidad económica a futuro y que se procure por la generación de empleo en la comunidad local, regional y nacional. Para llevar a cabo el presente trabajo de investigación con total rigurosidad, se ha planteado una metodología en la cual se propone la realización de un estudio descriptivo exploratorio. El instrumento de recolección de información propuesto es la encuesta y se emplearán los métodos estadísticos descriptivos para la interpretación de la información recolectada.
Automated Handwritten Equation Solver
Authors: Hussien Shereen 
Published: March 2024

Mathematics has an important role in person’s life, so solving the mathematical equations is an essential. Solving mathematical expressions is not restricted to just students but also for mathematicians, physicists and scientists. Solving the mathematical equations is an interesting process.The traditional method of solving math expressions is unsatisfactory as the user should learn different rules and approaches for each mathematical equation. Also, these methods may take long time in complex or obscure problems which makes them subject to user errors and mistakes. The challenging in mathematical expressions must be written in a specific format, users prefer to write them on paper as an easy entering way than other computerized tools.
This paper used the technology to introduce a new method over the traditional one using pen and paper. The equation handwriting easiness is blended (merge/integrate) with the advanced computer technologies speed to solve the equations with flexible robust way. An interface introduces that allows capturing the equations contained in an image then solving it without making the user dive into the complex rules. Various types of equations could be entered to this application (linear/nonlinear/quadratic) with achieving a convenient accuracy 95.7%.
Localizando el patrimonio invisible
Authors: Guerrero de Llanos Eva 
Published: March 2024

La presente investigación tiene tres objetivos: el estudio de documentos de archivo, elaboración de bases de datos y creación de plataforma QGIS donde aparezca la información relativa a más de mil quinientos Buques de Estado hundidos de competencia de la Administración General del Estado, en una horquilla cronológica comprendida entre 1450 y 1850. De este modo y en este orden, se procederá al desarrollo de la investigación.
Lo que distingue a esta investigación es su capacidad para fusionar disciplinas tradicionales con tecnologías avanzadas demostrando cómo el patrimonio histórico puede ser revitalizado y apreciado en un contexto contemporáneo. Este estudio sirve como un ejemplo poderoso de cómo la archivística puede converger de manera efectiva con las nuevas tecnologías geográficas, creando una sinergia que permite un análisis más profundo y contextualizado de los naufragios de Buques de Estado a lo largo de los siglos, ya que el uso de QGIS como plataforma de visualización y análisis geoespacial abre nuevas perspectivas en la interpretación de estos eventos históricos. En última instancia, este estudio resalta la importancia de la colaboración interdisciplinaria y la evolución constante de las técnicas de investigación histórica para enriquecer nuestro conocimiento del pasado y su relación con el mundo geográfico.
The present research is focused on the study of archival documents, the creation of databases, and the integration of this information into the QGIS platform, concerning approximately fifteen hundred State Ships that sank under the jurisdiction of the General State Administration, within a chronological range spanning from 1450 to 1850.
What sets this research apart is its ability to merge traditional disciplines with advanced technologies, showcasing how historical heritage can be revitalized and appreciated in a contemporary context. This study serves as a powerful example of how traditional archival practices can effectively converge with new geographic technologies, creating a synergy that enables a deeper and more contextual analysis of State Shipwrecks throughout the centuries. The use of QGIS as a platform for geospatial visualization and analysis opens new perspectives in the interpretation of these historical events.
Ultimately, this research underscores the importance of interdisciplinary collaboration and the ongoing evolution of historical research techniques to enrich our understanding of the past and its relationship with the geographical world.
Impacts of ice-nucleating particles on cirrus clouds and radiation derived from global model simulations with MADE3 in EMAC
Authors: Beer Christof G. , Hendricks Johannes , Righi Mattia 
Published: March 2024

Abstract. Atmospheric aerosols can act as ice-nucleating particles (INPs) and influence the formation and the microphysical properties of cirrus clouds, resulting in distinct climate effects. We employ a global aerosol–climate model, including a two-moment cloud microphysical scheme and a parameterization for aerosol-induced ice formation in cirrus clouds, to quantify the climate impact of INPs on cirrus clouds (simulated period 2001–2010). The model considers mineral dust, soot, crystalline ammonium sulfate, and glassy organics as INPs in the cirrus regime. Several sensitivity experiments are performed to analyse various aspects of the simulated INP–cirrus effect regarding (i) the ice-nucleating potential of the INPs, (ii) the inclusion of ammonium sulfate and organic particles as INPs in the model, and (iii) the model representations of vertical updraughts. The resulting global radiative forcing of the total INP–cirrus effect, considering all different INP types, assuming a smaller and a larger ice-nucleating potential of INPs, to explore the range of possible forcings due to uncertainties in the freezing properties of INPs, is simulated as −28 and −55 mW m−2, respectively. While the simulated impact of glassy organic INPs is mostly small and not statistically significant, ammonium sulfate INPs contribute a considerable radiative forcing, which is nearly as large as the combined effect of mineral dust and soot INPs. Additionally, the anthropogenic INP–cirrus effect is analysed considering the difference between present-day (2014) and pre-industrial conditions (1750) and amounts to −29 mW m−2, assuming a larger ice-nucleating potential of INPs. In a further sensitivity experiment we analyse the effect of highly efficient INPs proposed for cirrus cloud seeding as a means to reduce global warming by climate engineering. However, the results indicate that this approach risks an overseeding of cirrus clouds and often results in positive radiative forcings of up to 86 mW m−2 depending on number concentration of seeded INPs. Idealized experiments with prescribed vertical velocities highlight the crucial role of the model dynamics for the simulated INP–cirrus effects. For example, resulting forcings increase about 1 order of magnitude (−42 to −340 mW m−2) when increasing the prescribed vertical velocity (from 1 to 50 cm s−1). The large discrepancy in the magnitude of the simulated INP–cirrus effect between different model studies emphasizes the need for future detailed analyses and efforts to reduce this uncertainty and constrain the resulting climate impact of INPs.
Evolution of winter precipitation in the Nile river watershed since the last glacial
Authors: Meyer Vera Dorothee , Pätzold Jürgen , Mollenhauer Gesine , Castañeda Isla S. , Schouten Stefan , Schefuß Enno 
Published: March 2024

Abstract. Between 14.5 and 5 ka, the Sahara was vegetated owing to a wet climate during the African humid period. However, the climatic factors sustaining the “green Sahara” are still a matter of debate. Particularly the role of winter precipitation is poorly understood. Using the stable hydrogen isotopic composition (δD, where D stands for deuterium) of high molecular weight (HMW) n-alkanoic acids in a marine sediment core from the eastern Mediterranean, we provide a continuous record for winter precipitation in the Nile river delta spanning the past 18 kyr. Pairing the data with δD records from HMW n-alkanes from the same core, we show that HMW n-alkanoic acids constantly derived from the delta, while the HMW n-alkanes also received significant contributions from the headwaters between ∼ 15–1 ka when fluvial runoff enhanced. This enables us to reconstruct the evolution of Mediterranean (winter) and monsoonal (summer) rainfall in the Nile river watershed in parallel. In the delta, the Heinrich stadial 1 (HS1) evolved in two phases, with a dry episode between ∼ 17.5–16.0 ka, followed by wet conditions between ∼ 16–14.5 ka. Winter rainfall enhanced substantially between 11–6 ka, lagging behind the intensification of the summer monsoon by ca. 3 kyr. Heavy winter rainfall resulted from a southern position of the Atlantic storm track combined with elevated sea surface temperatures in the eastern Mediterranean, reinforcing local cyclogenesis. We show that during the green Sahara, monsoon precipitation and Mediterranean winter rainfall were both enhanced and infer that the winter rainfall zone extended southwards, delivering moisture to the Sahara. Our findings corroborate recent hypotheses suggesting that winter rains that extended southward were a crucial addition to the northward displacement of the summer monsoon in helping to sustain a green Sahara.
GPS displacement dataset for the study of elastic surface mass variations
Authors: Peidou Athina , Argus Donald F. , Landerer Felix W. , Wiese David N. , Ellmer Matthias 
Published: March 2024

Abstract. Quantification of uncertainty in surface mass change signals derived from Global Positioning System (GPS) measurements poses challenges, especially when dealing with large datasets with continental or global coverage. We present a new GPS station displacement dataset that reflects surface mass load signals and their uncertainties. We assess the structure and quantify the uncertainty of vertical land displacement derived from 3045 GPS stations distributed across the continental US. Monthly means of daily positions are available for 15 years. We list the required corrections to isolate surface mass signals in GPS estimates and screen the data using GRACE(-FO) as external validation. Evaluation of GPS time series is a critical step, which identifies (a) corrections that were missed, (b) sites that contain non-elastic signals (e.g., close to aquifers), and (c) sites affected by background modeling errors (e.g., errors in the glacial isostatic model). Finally, we quantify uncertainty of GPS vertical displacement estimates through stochastic modeling and quantification of spatially correlated errors. Our aim is to assign weights to GPS estimates of vertical displacements, which will be used in a joint solution with GRACE(-FO). We prescribe white, colored, and spatially correlated noise. To quantify spatially correlated noise, we build on the common mode imaging approach by adding a geophysical constraint (i.e., surface hydrology) to derive an error estimate for the surface mass signal. We study the uncertainty of the GPS displacement time series and find an average noise level between 2 and 3 mm when white noise, flicker noise, and the root mean square (rms) of residuals about a seasonality and trend fit are used to describe uncertainty. Prescribing random walk noise increases the error level such that half of the stations have noise > 4 mm, which is systematic with the noise level derived through modeling of spatially correlated noise. The new dataset is available at https://doi.org/10.5281/zenodo.8184285 (Peidou et al., 2023) and is suitable for use in a future joint solution with GRACE(-FO)-like observations.
Disentangling coastal groundwater level dynamics in a global dataset
Authors: Nolte Annika , Haaf Ezra , Heudorfer Benedikt , Bender Steffen , Hartmann Jens 
Published: March 2024

Abstract. Groundwater level (GWL) dynamics result from a complex interplay between groundwater systems and the Earth system. This study aims to identify common hydrogeological patterns and to gain a deeper understanding of the underlying similarities and their link to physiographic, climatic, and anthropogenic controls of groundwater in coastal regions. The most striking aspects of GWL dynamics and their controls were identified through a combination of statistical metrics, calculated from about 8000 groundwater hydrographs, pattern recognition using clustering algorithms, classification using random forest, and SHapley Additive exPlanations (SHAPs). Hydrogeological similarity was defined by four clusters representing distinct patterns of GWL dynamics. These clusters can be observed globally across different continents and climate zones but simultaneously vary regionally and locally, suggesting a complicated interplay of controlling factors. The main controls differentiating GWL dynamics were identified, but we also provide evidence for the currently limited ability to explain GWL dynamics on large spatial scales, which we attribute mainly to uncertainties in the explanatory data. Finally, this study provides guidance for systematic and holistic groundwater monitoring and modeling and motivates a consideration of the different aspects of GWL dynamics, for example, when predicting climate-induced GWL changes, and the use of explainable machine learning techniques to deal with GWL complexity – especially when information on potential controls is limited or needs to be verified.
PERSEPSI PESERTA DIDIK TERHADAP VIDEO PEMBELAJARAN MATEMATIKA PADA PASCA PANDEMI COVID-19 KELAS VIII UPT SPF 35 MAKASSAR
Authors: Nurlatu Mega , Hamid Sundari , Jainuddin Jainuddin 
Published: March 2024

Penelitian ini dilakukan dengan tujuan untuk mengetahui persepsi peserta didik terhadap video pembelajaran matematika pada pasca pandemi Covid-19 siswa kelas VIII UPT SPF SMP Negeri 35 Makassar. Jenis penelitian ini menggunakan metode penelitian deskriptif dengan data kualitatif, untuk mendapatkan cara dengan wawancara. Subjek dalam penelitian ini adalah siswa kelas VIII 3 UPT SPF SMP Negeri 35 Makassar. Faktor yang mempengaruhi persepsi dibagi menjadi tiga indikator, yaitu: (1 Penyerapan terhadap rangsang atau objek luar individu),(2 pengertian penerimaan yang memiliki pemahaman yang cepat dan menarik oleh individu), dan (3 penilaian evaluasi terhadap individu). Hasil penelitian menunjukan bahwa persepsi siswa kelas VIII 3 terhadap video pembelajaran matematika adalah sangat baik. Secara keselururuhan faktor persepsi dikategorikan sangat positif.

Kata kunci: Persepsi peserta didik, video pembelajaran matematika, dan pasca pandemi.
PENGARUH PERHATIAN ORANG TUA DAN FASILITAS BELAJAR TERHADAP HASIL BELAJAR MATA PELAJARAN MATEMATIKA KELAS VIII SMP NEGERI 35 MAKASSAR
Authors: Amijoyo Sardiman , Jainuddin Jainuddin , Hamid Sundari 
Published: March 2024

Penelitian ini dilakukan dengan tujuan untuk mengetahui Pengaruh Perhatian Orang Tua Dan Fasilitas Belajar Terhadap Hasil Belajar Mata Pelajaran Matematika Kelas VIII SMP Negeri 35 Makassar. Jenis penelitian ini adalah penelitian expost facto dengan pendekatan kuantitatif. Sampel penelitian ini adalah siswa kelas VIII sebanyak 99 orang. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah kuesioner. Data yang diperoleh diolah menggunakan SPSS 22. Hasil penelitian menunjukkan berdasarkan enam indikator dalam pengaruh perhatian orang tua yakni, pemberian bimbingan belajar, pengawasan terhadap anak, pemberian penghargaan dan hukuman, pemenuhan kebutuhan belajar, menciptakan suasana belajar yang tenang dan tentram, dan memperhatikan kesehatan, diperoleh nilai rata-rata indikator sebesar 81,04%, dan fasilitas belajar sebesar 83,09%, terbukti mempengaruhi hasil belajar mata pelajaran matematika kelas VIII SMP Negeri 35 Makassar. Dari hasil uji regresi berganda diperoleh bahwa nilai nilai signifikasi 0,000 < 0,05 yang berarti bahwa variabel perhatian orang tua dan fasilitas belajar berpengaruh terhadap hasil belajar kelas VIII SMP Negeri 35 Makassar.
PENGARUH PENGGUNAAN MEDIA ANIMASI PEMBELAJARAN BAHASA INDONESIA TERHADAP HASIL BELAJAR SISWA KELAS IV UPT SPF SDN PAMPANG KOTA MAKASSAR
Authors: Iren Fefbrianti , Asdar Asdar , Angreani A. Vivit 
Published: March 2024

Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh penggunaan media animasi pembelajaran bahasa Indonesia terhadap hasil belajara siswa. Jenis penelitian ini adalah penelitian eksperimen dengan desain penelitian Pre-Experimental One Group Pretest-Posttest, yaitu memberikan tes sebelum adanya perlakuan, kemudian memberikan tes setelah adanya perlakuan dengan menggunakan media animasi. Sampel dalam penelitian ini adalah siswa kelas IV-a sebanyak 29 orang. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah observasi, tes dan dokumentasi yang dianalisis dengan statistik deskriptif dan inferensial. Hasil penelitian menunjukkan bahwa ada pengaruh penggunaan media animasi pembelajaran bahasa Indonesia terhadap hasil belajar siswa. Hal ini dapat dilihat berdasarkan hasil analisis bahwa nilai tHitumg tTabel = 19,70 1,703 dan dapat disimpulkan bahwa terdapat pengaruh yang signifikan pada penggunaan media animasi pembelajaran bahasa Indonesia terhadap hasil belajar siswa kelas IV UPT SPF SDN Pampang Kota Makassar.