bluuebunny/crossref_metadata_2025_split huggingface dataset:
Predicting Satisfaction With Chat-Counseling at a 24/7 Chat Hotline for the Youth: Natural Language Processing Study
Authors: Hornstein Silvan , Lueken Ulrike , Wundrack Richard , Hilbert Kevin 
Published: December 2024

Background
Chat-based counseling services are popular for the low-threshold provision of mental health support to youth. In addition, they are particularly suitable for the utilization of natural language processing (NLP) for improved provision of care.

Objective
Consequently, this paper evaluates the feasibility of such a use case, namely, the NLP-based automated evaluation of satisfaction with the chat interaction. This preregistered approach could be used for evaluation and quality control procedures, as it is particularly relevant for those services.

Methods
The consultations of 2609 young chatters (around 140,000 messages) and corresponding feedback were used to train and evaluate classifiers to predict whether a chat was perceived as helpful or not. On the one hand, we trained a word vectorizer in combination with an extreme gradient boosting (XGBoost) classifier, applying cross-validation and extensive hyperparameter tuning. On the other hand, we trained several transformer-based models, comparing model types, preprocessing, and over- and undersampling techniques. For both model types, we selected the best-performing approach on the training set for a final performance evaluation on the 522 users in the final test set.

Results
The fine-tuned XGBoost classifier achieved an area under the receiver operating characteristic score of 0.69 (P<.001), as well as a Matthews correlation coefficient of 0.25 on the previously unseen test set. The selected Longformer-based model did not outperform this baseline, scoring 0.68 (P=.69). A Shapley additive explanations explainability approach suggested that help seekers rating a consultation as helpful commonly expressed their satisfaction already within the conversation. In contrast, the rejection of offered exercises predicted perceived unhelpfulness.

Conclusions
Chat conversations include relevant information regarding the perceived quality of an interaction that can be used by NLP-based prediction approaches. However, to determine if the moderate predictive performance translates into meaningful service improvements requires randomized trials. Further, our results highlight the relevance of contrasting pretrained models with simpler baselines to avoid the implementation of unnecessarily complex models.

Trial Registration
Open Science Framework SR4Q9; https://osf.io/sr4q9
Preparation and Characterization of Encapsulated <i>Cymbopogon citratus</i> Essential Oils in Alginate/Chitosan Complexes Using Ion-Gel Technique
Authors: Pham Huynh Mai , Nguyen Thuong Nhan Phu , Van Chi Khang , Mai Huynh Cang 
Published: December 2024

In this study, the alginate/chitosan complexes were prepared to encapsulate lemongrass essential oils (Cymbopogon citratus). Essential oils are secondary metabolites that are easily changed under environmental influences (temperature, pH, light). This research opened a new line in protecting essential oils from adverse effects from the surrounding environment. The ion-gel encapsulation technique combined with alginate/chitosan complexes has been applied to encapsulate C. citratus essential oil. The factors were surveyed including homogenization time (10–20 min), concentration of Tween 80 (0–5% w/w), concentration of sodium alginate (1.5–3.5% w/v), concentration of essential oils (20–40% w/w), concentration of CaCl2 (1.0–2.5% w/v), concentration of chitosan (0.5–2.0%), and pH of chitosan solution (4–6). The properties of products have been determined including moisture content as 80.39%, encapsulation yield as 98.79%, encapsulation efficiency as 88.74% with homogenization time as 15 min, concentration of Tween 80 as 1.5%, concentration of sodium alginate as 2.5% (w/v), concentration of essential oils as 30% (w/w), concentration of CaCl2 as 2.5% (w/v), concentration of chitosan as 2.0% (w/w), and pH chitosan solution as 5. The main chemical compositions of essential oils before and after encapsulation, such as citral, myrcene, and limonene, have still remained.
Synthesis of Aragonite from Precipitated Calcium Carbonate: A Pilot Scale Study
Authors: Sari Ellyta , Desmiarti Reni , Zulhadjri Zulhadjri , Alif Matlal Fajri , Rosadi Maulana Yusup , Arief Syukri 
Published: December 2024

The CO2 mineralization pathway is considered a promising option for carbon capture usage and storage because the captured CO2 can be permanently stored, and secondly industrial waste (i.e., petrochemical refinery, lime, and cement kiln dust) can be recycled into value-added carbonate materials by controlling the crystal polymorphs and properties of mineral carbonate. This study investigated the CO2 mineralization utilized for the synthesis of precipitated calcium carbonate (PCC) via low temperatures at 30 °C and 55 °C with the addition of 50 and 75 g/L of ammonium chloride (NH4Cl). The pilot scale of PCC production was established to simultaneously produce PCC with low energy demand by reporting the feasibility of economic analysis and to develop the mineral carbonation that can transform limestones and CO2, which was captured from the petrochemical refinery process into economically valuable PCC. It is found that the aragonite phase of PCC can be generated at a room temperature of 30 °C by adjusting the CO2 flow rate. In addition, the use of NH4Cl, which transformed into ammonium carbonate ((NH4)2CO3) during the calcination process, can maintain the stable aragonite phase by varying the NH4Cl concentration.
Optimizing Dye-Sensitized Solar Cell (DSSC) Performance through Synergistic Natural Dye Combinations from <i>Beta vulgaris</i> L., <i>Curcuma longa</i> L., and <i>Pandanus amaryllifolius</i>
Authors: Kusumawati Nita , Setiarso Pirim , Muslim Supari , Zakiyah Nafisatus , Rahmawati Khofifatul , Fachrirakarsie Fadlurachman Faizal 
Published: December 2024

This study optimizes dye-sensitized solar cell (DSSC) performance using a combination of natural dye components extracted from Beta vulgaris L. (beetroot), Curcuma longa L. (turmeric), and Pandanus amaryllifolius (pandanus leaf). These plants were selected for their natural pigments—betacyanin, curcuminoids, and chlorophyll—which potentially act as DSSC sensitizers. Dyes were extracted via maceration with ethanol solvent (1:6 sample:solvent ratio) for 24 h. Filtrates were combined in various ratios to test DSSC performance. The optimal C4 dye combination, with a 2:1:1 ratio (betacyanin:curcumin:chlorophyll), demonstrated the best performance. The UV-vis analysis revealed complex interactions and synergistic effects among dye combinations, characterized by increased light absorption in the 400–700 nm range. Cyclic voltammetry analysis showed favorable energy band gap values, confirming the pigments' suitability for DSSC applications. FTIR analysis confirmed the stable coexistence of the three dyes without new bond formation. Photovoltaic performance testing showed the C4 three-dye combination achieved the highest energy conversion efficiency of 3.57%. These results demonstrate the potential of this dye combination to contribute to the development of sustainable and efficient solar energy conversion in DSSCs.
Synthesis of Water-Soluble Menthol Derivatives Using Response Surface Methodology
Authors: Nisar Shafaq , Hanif Muhammad Asif , Rashid Umer , Jilani Muhammad Idrees , Bhatti Ijaz Ahmad , Ali Imtiaz , Zieniuk Bartłomiej 
Published: December 2024

In this study, menthol was glycosylated with starch in the presence of α-amylase to produce menthyl maltoside (MenM) as the primary product. Optimization of the experimental parameters, including the menthol-starch ratio, enzyme concentration, temperature, and time, was performed using response surface methodology (RSM). The RSM-generated model displayed adequate accuracy and reasonable predictability for the MenM yield under the specified experimental conditions. Under the optimized reaction conditions of the menthol-to-starch ratio of 1:3 (50 °C, 18 h) and enzyme concentration of 50 U, the highest yield of MenM (23.7%) was obtained. Fourier transform infrared and nuclear magnetic resonance spectroscopies were employed to analyze the synthesized menthol derivative MenM. Compared with standard menthol, the synthesized menthol derivatives displayed various biological activities, including antioxidant, antibacterial, antifungal, and insecticidal properties. The results of this study demonstrate the effectiveness of RSM-optimized synthesis of MenM from the glycosylation of menthol with starch. This study showed that MenM is highly soluble in water and can be easily stored owing to its non-volatile nature.
New Insights of Response Surface Methodology Approach in Optimizing Total Phenolic Content of <i>Zanthoxylum acanthopodium</i> DC. Fruit Extracted Using Microwave-Assisted Extraction and the Impact to Antioxidant Activity
Authors: Sumaiyah Sumaiyah , Murwanti Retno , Illian Didi Nurhadi , Lubis Muhammad Fauzan , Tampubolon Keshia 
Published: December 2024

Zanthoxylum acanthopodium DC., a unique spice plant from North Sumatra, is rich in beneficial secondary metabolites, particularly phenolic compounds. This study utilized the microwave-assisted extraction method to enhance the extraction of these bioactive compounds. The goal was to determine the optimal extraction conditions, including solvent concentration (X1), microwave power (X2), and extraction time (X3) to maximize the total phenolic content (TPC) of Z. acanthopodium fruit. A Box-Behnken design, part of response surface methodology, was used with three factors at three levels: X1 (50%, 75%, and 100% ethanol in water), X2 (180, 300, and 450 W), and X3 (3, 8.5, and 14 min). The phenolic compounds in the optimized extract were identified using LC-HRMS, and its antioxidant activity was measured using radical scavenging activity assays. The statistical analysis indicated a significant quadratic model (p-value < 0.05), with a high R2 of 86.25%. Optimal conditions for maximum TPC (159.637 ± 5.72 mg GAE/g) were achieved with 50% ethanol, 450 W, and 8.5 min, outperforming conventional extraction methods. Compared to the non-optimized extract, the optimized extract also exhibited strong antioxidant activity, particularly in DPPH radical inhibition. This method successfully optimized TPC in Z. acanthopodium fruit, enhancing its antioxidant properties.
Analysis of Hg(II) Metal by Voltammetric Method Using a Carbon Electrode Modified with EDTA from Used Tire Waste
Authors: Sukoma Sukoma , Alva Sagir , Safitri Eka , Julinawati Julinawati , Mustanir Mustanir , Fonna Syafrizal , Ihsan Muhammad , Dara Fitri , Dayanti Meri , Arifin Ahmad Kamal , Suhud Khairi 
Published: December 2024

Development of a carbon electrode sensor from used tire waste via pyrolysis, modified with ethylenediaminetetraacetic acid (EDTA) for mercury detection using the cyclic voltammetry (CV) method. EDTA plays a role in metal complexation due to its strong response to mercury metal. The FTIR results of the carbon electrode and EDTA show a C–N bond at a wavenumber of 1,217.08 cm−1, indicating the presence of EDTA. The SEM results reveal a clear difference between the unmodified carbon electrode and the EDTA-modified carbon electrode. The calibration graph is linear, with an R2 value of 0.9961, a sensitivity of 0.3472, as well as LoD and LoQ values of 0.03 and 0.08 ppm, respectively. The correlation coefficient is less than 2%, and the %recovery is within the allowable error range. Mercury measurements in Sungai Mas water samples, Aceh Barat, using voltammetry and AAS, exceed the threshold set by Indonesian Government Regulation (PPRI) No. 22 of 2021. The t-test results for the two Hg measurement methods at a 5% significance level (α) show that tcalculated < ttable (0.083 < 2.571). This indicates no significant difference between the voltammetry and AAS methods for measuring Hg concentrations in water.
A Comparative Study of LiNCA Cathode Recycled from Spent Lithium-Ion Batteries and Synthesized from Metal Precursor
Authors: Jumari Arif , Apriliani Enni , Yudha Cornelius Satria , Purwanto Agus , Syahrial Anne Zulfia , Pita Rengga Wara Dyah 
Published: December 2024

Spent lithium NCA (LiNCA) battery was recycled using organic and inorganic acids and the performances were compared against the cathode synthesized from precursor. The metals in the spent cathode were leached using sulfuric or citric acid and coprecipitated into ternary metal oxalate (TMO) after reduction and lithium separation. Subsequently, the coprecipitated solution was used for cathode synthesis. Leaching efficiencies for nickel, cobalt and aluminum using citric acid were 85.6, 94.1, and 99%, respectively, while the efficiencies using sulfuric acid were 96, 98, and 100%, respectively. TMO produced from coprecipitation had the same physical characteristics. It was important to acknowledge that all cathodes also had similar physical characteristics. The electrochemical tests showed that commercial cathodes had the highest capacity of 150 mAh/g. This was followed by those from precursors, sulfuric acid leaching, and citric acid leaching, which recorded 142, 135, and 130 mAh/g, respectively. Based on the cycle test at 1C, the sample from citric acid leaching was 86% after 20 cycles compared to others at 82–83%. The results suggested that spent LiNCA could be regenerated into new cathodes using acid with performance comparable to those synthesized from precursor. This presented a viable alternative for LiNCA cathode synthesis.
Continuous Glucose Monitor Accuracy for Diabetes Management in Hospitalized Children
Authors: Garg Neha , Lewis Kamryn , White Perrin C. , Adhikari Soumya 
Published: December 2024

OBJECTIVE
The adoption of continuous glucose monitors (CGMs) in inpatient settings in the pediatric population has been slow because of a scarcity of data on their reliability in hospitalized children.

RESEARCH DESIGN AND METHODS
We retrospectively reviewed the accuracy of the Dexcom G6 CGM system in pediatric patients with diabetes admitted to our academic children’s hospital from March 2018 to September 2023. We cross-referenced the Dexcom Clarity database against an internal database of inpatient admissions to identify all children with CGM data admitted to the hospital. We recorded sensor glucose readings from Clarity and values for point-of-care (POC) glucose, blood urea nitrogen (BUN), and pH from the electronic medical record. CGM accuracy and clinical reliability were measured by mean absolute relative difference (MARD) and Clarke error grid (CEG) analyses.

RESULTS
There were 3,200 admissions of children with diabetes in this period, of which 277 (from 202 patients age 2–18 years) had associated CGM data. Paired CGM and POC measurements (n = 2,904) were compared, resulting in an MARD of 15.9%, with 96.6% of the values in zones A and B of the CEG analysis. Approximately 62% of paired values fell within a 15% or 15 mg/dL difference, whichever was larger (15%/15 mg/dL range), 74% within 20%/20, and 88% within 30%/30. Serum pH, sodium, and BUN had no impact on CGM values or absolute relative difference in linear regression analysis.

CONCLUSIONS
CGMs demonstrated acceptable accuracy in hospitalized children with diabetes. CGM data should be integrated into hospital electronic records to optimize management.
The Effect of Video Camera, Microphone and Chat Box Use on Social Presence and Engagement in an Online Group Activity
Authors: Minosky Shayna , El Aini Nachwa , Justus Brandon , Bali Tanisha 
Published: December 2024

With the rapidly expanding availability of online courses, concerns have been raised about student engagement and connection within the online environment. Using an experimental design, we examined the effects of video camera, microphone, and chat box communication mediums on students’ experiences of social presence, peer rapport, motivation, satisfaction, and anxiety. A total of 133 undergraduate students were randomly assigned to a video, audio, or chat box condition and asked to complete an online interactive group task and a post-task survey. One-ways ANOVAs indicated that participants in the chat box condition reported lower levels of social presence, peer rapport, motivation and satisfaction compared to both the video and audio conditions, with no differences between the video and audio conditions. Those in the video condition reported higher anxiety levels than those in the chat box condition. We recommend that students participate in their online classes using video cameras and/or microphones to increase engagement and interpersonal connections with peers.
PEMBERDAYAAN PEREMPUAN MELALUI PROGRAM KEWIRAUSAHAAN PEMANFAATAN LAHAN PEKARANGAN DALAM MENINGKATKAN PENDAPATAN KELUARGA
Authors: Fajri Nida Nur , Herwina Wiwin , Laksono Bayu  Adi 
Published: December 2024

Pemberdayaan masyarakat dianggap sebagai langkah utama dalam mewujudkan proses pembangunan yang dilakukan oleh pemerintah dengan menggali potensi sumberdaya alam dan sumber daya manusia. tujuan dalam penelitian ini adalah untuk mengetahui proses Pemberdayaan Perempuan Melalui Program Pemanfaatan Lahan Pekarangan dan Pengolahan Hasil Tanaman Bayam. Penelitian ini dilakukan dengan focus pada pemberdayaan perempuan melalui program pemanfaatan lagan guna meningkatkan pendapatan keluarga yang ada pada Wirausaha Bolu Gulung Ayam Kelompok Wanita Tani Cipatani Kota Tasikmalaya. Metode penelitian yang digunakan yaitu deskriptif dengan pendekatan kualitatif. Subjek penelitian yang digunakan dalam penelitian ini diantaranya yaitu penyuluh, ketua wanita tani dan tiga anggota wanita tani. Teknik analisis data yang digunakan dalam penelitian ini adalah model analisis interaktif yang telah dengan metode pengumpulan data melalui wawancara, observasi dan dokumentasi. Hasil penelitian yang telah dilakukan menunjukkan bahwa untuk mewujudkan pemberdayaan perempuan melalui program rintisan memanfaatkan pekarangan dan mengolah produk bayam memiliki beberapa proses, dimulai dengan menarik anggota yang mayoritas berusia 40- 60 tahun, Hasil yang telah diolah oleh anggota kelompok wanita tani Cipatani yaitu salah satunya bolu bayam dan keripik bayam dengan penghasilan perbulannya 50.000 sampai dengan 250.000 tergantung banyaknya konsumen yang membeli. Anggota kelompok wanita tani juga menjual hasil olahannya melalui media dan marketplace online. Kata Kunci: Pemberdayaan, Pemanfaatan Lahan Pekarangan, Pendapatan Keluarga.
PERAN DAN EKSISTENSI JURNALIS OLAHRAGA DI JAWA TENGAH DALAM MENYAJIKAN BERITA OLAHRAGA DI ERA DIGITAL
Authors: Prakosa Himawan , Nurrachmad Limpad 
Published: December 2024

Bencana Covid-19 memaksa kegiatan dilakukan secara daring, yang mengakibatkan perubahan signifikan dalam bidang informasi dan komunikasi masyarakat. Di era digital, informasi dapat disampaikan secara real-time dan akurat. Organisasi media di Jawa Tengah berperan penting dalam menyampaikan berita dengan tepat waktu. Penelitian ini bertujuan untuk mengetahui peran dan eksistensi jurnalis olahraga di Jawa Tengah dalam menyajikan berita olahraga di era digital.Metode dalam penelitian ini menggunakan metode kualitatif deskriptif, teknik pengumpulan data menggunakan wawancara, dan dokumentasi dengan validitas diperiksa melalui triangulasi sumber. Analisis data dilakukan dengan menggunakan model analisis Miles dan Huberman.Hasil penelitian menunjukkan bahwa jurnalis olahraga berperan penting dalam menyampaikan informasi kepada masyarakat. Mereka melakukan riset dan mencari referensi sebelum menerbitkan berita olahraga. Tantangan utama bagi mereka adalah kecepatan publikasi di era digital dan koneksi internet yang buruk.Jurnalis olahraga berperan sangat penting dalam menyajikan berita dengan selalu meneliti secara mendalam sebelum mencari berita dan keberadaan jurnalis olahraga dapat diketahui melalui hasil beritanya di media online, serta tantangan dan kendala seorang jurnalis olahraga di era digital adalah kecepatan pemberitaan dan koneksi internet yang tidak stabil pada saat publikasi berita.
Problem Solving Method through Mathematics Home Media to Stimulate Early Childhood Cognitive Development
Authors: Dewi Dewi , Yusdiana Yusdiana , Azzahra Nurma Annisa , Anarky Lheo 
Published: December 2024

Pemecahan masalah adalah diantara bentuk kemampuan kognitif yang penting dikembangkan sejak usia dini. Banyak metode untuk mengembangkan kemampuan ini, satu diantaranya adalah melalui metode problem solving. Penelitian ini bertujuan untuk mengetahui sejauh mana efektivitas penggunaan metode problem solving dengan dukungan media rumah matematika dalam mengembangkan kemampuan kognitif anak usia dini. Pendekatan penelitian yang peneliti gunakan adalah kuantitatif dengan jenis eksperimen. Sampel dalam penelitian ini yaitu anak usia dini yang ada di kelas B1 dan B2 TK Islamiyah Pontianak. Pengambilan sampel dilakukan dengan teknik total sampling, sedangkan data dikumpulkan melalui teknik observasi, teknik tes dan dokumentasi. Hasil penelitan menunjukkan bahwa, perkembangan kognitif anak di kelas kontrol sebelum menggunakan metode problem solving berbantuan media rumah matematika belum berkembang dengan baik, dengan perolehan nilai total skor sebesar 1130. Sementara, pada kelas eksperimen, kemampuan kognitif anak mengalami peningkatan yaitu dengan total perolehan skor sebesar 1205. Berdasarkan hal tersebut maka, penggunaan metode problem solving berbantuan media Rumah Matematika dapat meningkatkan kemampuan kognitif anak usia dini.
Problem solving is one of the forms of cognitive ability that is important to develop from an early age. There are many methods to develop this ability, one of which is through the problem-solving method. This study aims to determine the extent of the effectiveness of the use of problem-solving methods with the support of mathematics-based home media in developing early childhood cognitive abilities. The research approach used by the researcher is a quantitative type of experiment. The sample in this study is early childhood in grades B1 and B2 of Pontianak Islamiyah Kindergarten. Sampling was carried out using the total sampling technique, while data was collected through observation techniques, test techniques, and documentation. The results of the research show that the cognitive development of children in the control class before using the problem-solving method assisted by mathematics home media has not developed well, with a total score of 1130. Meanwhile, in the experimental class, the child’s cognitive ability has increased, with a total score of 1205. Based on this, the use of the problem-solving method assisted by the mathematics home medium can improve the cognitive abilities of early childhood.