bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-contact concentration measurement of high-viscosity aqueous solutions
Authors: Iwasaki Kazuma , Fujii Sho , Kimura Tsuyoshi , Yamamoto Masaya , Tanabe Tadao 
Published: June 2024

Abstract

To evaluate the concentration dependence of THz spectra, we used THz time-domain spectroscopy (THz-TDS) to measure the transmittance of aqueous solution samples of ethylene glycol and glycerol at room temperature in the frequency range of 0.4 THz and below, and analyzed the spectra in the region below 0.2 THz where water absorption is low. The results showed that for both ethylene glycol and glycerol samples, the interference spectral shape based on the change in dielectric constant changed as the liquid concentration was varied. Peak separation was performed on the peaks of the obtained spectra, and a comparison of the change in peak position with concentration showed a shift in the peak at 0.17 THz for both samples. The shifts between 60% and 100% reagent concentrations are approximately 0.003 THz for ethylene glycol and 0.006 THz for glycerol. The shift for glycerol, which has three hydroxy groups (OH groups) and thus has greater intermolecular interactions, is twice that of ethylene glycol. Glycerol showed a linear relationship between concentration change and peak shift. These results indicate that non-contact concentration measurement using terahertz waves is possible and that higher viscosity is more suitable as a measurement target.
Subsurface Structures of the 2016 Mihoub Earthquake Sequence in North-Central Algeria Using Local Earthquake Tomography
Authors: kameche kheireddine , hammoud beldjoudi , issam abacha , ghania dabouz 
Published: June 2024

Abstract

This study investigates the Mihoub region within the Blida Mountains of the Tellian Atlas(Abacha et al., 2014), an area prone to earthquakes due to the Africa-Eurasia plate convergence since the Late Cretaceous. We present both the 1910 Aumale earthquake (Ms 6.6 and I0=VIII) and the 2016 seismic sequence (Mw 5.3). Using local seismic tomography (LET) with Local Tomography Software in its twelfth version (LOTOS 12), we analyze velocity anomaly patterns and their correlation with subsurface structures in the Mihoub area. Our dataset includes 503 well-localized aftershocks from the 2016 seismic sequence. Results show consistent patterns, with positive anomalies associated with rigid block structures and negative anomalies associated with basins, recent formations, and tectonic structures. In particular, a NE-SW corridor of low-velocity anomalies aligns with Miocene and Oligocene formations. Mainshock and aftershock epicenters from the 2016 sequence align with the boundary between low and high-velocity anomalies, indicating the Mihoub Fault zone. Fault depth analysis suggests a maximum depth of 8 km, consistent with previous research. Vertical sections confirm similar azimuths and dips of fault segments involved in the 2016 and 2014 mainshocks. This study provides valuable insights into velocity anomaly patterns and their relationship to fault structures, enhancing the understanding of fault systems and seismic hazards in the Mihoub area.
Resource misallocation and market inefficiency: Investigating the healthcare sector when considering undesirable output
Authors: Shen Zhiyang , Baležentis Tomas 
Published: June 2024

Abstract

Numerous scholars have integrated the consideration of undesirable (bad) outputs into data envelopment analysis methods for evaluating environmental efficiency or productivity. However, there has been limited application of this approach to assess the operational performance of hospitals that involves bad outputs. This study specifically focuses on the mortality of hospital patients as a bad output, and the underlying assumption is that patients with severe medical conditions tend to choose higher-tier hospitals with better medical conditions for treatment. These critically ill patients may inherently exhibit elevated mortality rates. Moreover, when a surge of such patients inundates a hospital, constraints in equipment, staffing levels, and quality may impede the continuity of medical care. Essentially, insufficient resources to attend to patients can result in an upswing in the number of deaths. Therefore, utilizing provincial-level hospital data in China, this paper analyzes how resource misallocation affects patient mortality. Furthermore, it explores potential strategies for optimizing resources in order to enhance the overall efficiency and effectiveness of healthcare delivery.
JEL: I12; I18; H51.
Preparation of novel double cross-linked hydrogels of dietary fibers and proteins from soybeans as scaffolds for cultured meat
Authors: Fang Huicheng , Yu Wei , Gao Boyan , Niu Yuge , Yu Liangli 
Published: June 2024

Abstract

The composited hydrogels derived from natural materials are getting attention in the field of cultured meat due to their advantages of biocompatibility and degradability as cell scaffolds. In this work, two edible cross-linking agents, transglutaminase (TGase) and/or calcium ions, were successfully used to cross-link soy protein isolated (SPI) and soy dietary fiber (SDF) to fabricate different scaffolds. The prepared scaffolds were characterized by structural, hydration, rheological and mechanical analysis. The double cross-linked scaffolds exhibited highest compressive moduli compared to the single cross-linked scaffolds and had an excellent liquid absorbing ability up to 309.45%, while its porosity was as high as 72.66%. In addition, NIH 3T3 cells were used to evaluate the biocompatibility of the scaffolds in vitro. The double cross-linked scaffolds could promote the expression of differentiation-related genes and were beneficial for cell adhesion and proliferation. In conclusion, present research provides a new approach to prepare cell scaffolds using soybean resources, which could be used in cultured meat applications.
The Membership in the World Trade Organization and Trade Policy Space in Developing Countries
Authors: GNANGNON Sena Kimm 
Published: May 2024

Abstract

Many scholars and commentators have argued that the membership in the World Trade Organization (WTO) has resulted in the restriction of developing countries’ trade policy space, preventing them from industrializing and promoting development. The present article has tested empirically this assertion, using a sample of 87 developing countries over period 1986–2020. It has shown that the WTO membership genuinely has restricted developing countries’ trade policy space, and countries that had larger trade policy space have experienced larger trade policy space restrictions. However, these outcomes mask different realities across sub-samples, including Least developed countries (LDCs) - that enjoyed more generous flexibilities in WTO rules - versus NonLDCs, and Article XII member states - those that undertook greater trade liberalization commitments – versus NonArticle XII member states. Finally, countries with larger trade policy space tended to secure a greater trade policy space, as they improved their participation in global trade.
JEL Classification: F13; F14.
Uptake of core outcome sets in pediatric clinical trials: a protocol
Authors: Lei Ruobing , Estill Janne , Florez Ivan , Li Qiu , Chen Yaolong , Williamson Paula 
Published: May 2024

Abstract

Introduction
A growing number of pediatric core outcome sets (COS) have been developed in the past 20 years. Previous studies have provided many useful insights into the uptake of COS. In addition to the awareness of COS among clinical trialists, some methodology of COS development (especially patient involvement) can promote COS uptake. However, the uptake of COS in pediatric clinical trials needs to be further explored. The aim of this study is to provide information on the rationale and use of pediatric COS in clinical trials, and to analyze in depth the awareness and views of COS developers and clinical trialists about the development and use of COS.
Methods and analysis
We will include all pediatric COS identified in our previous systematic review and those subsequently included in the COMET database. We will extract the data including the target condition, population, intervention, list of core outcomes, and the details of patient involvement. Next, we will search Clinicaltrials.gov for trials on health conditions addressed by the identified COS. The comparability of the scopes in each COS-trial pair and for the outcomes in each clinical trial that are exact matches, general matches, and non-matches with outcomes in each relevant COS will be assessed. Finally, we will conduct a survey and semi-structured interviews among COS developers and clinical trialists to examine their views.
Ethics and dissemination
Ethical approval for the study has been granted by the ethics committee of the Lanzhou University.
Strengths and limitations of the proposed study
The uptake of pediatric COS will be presented and analyzed in a comprehensive manner through comparative analysis of the literature and a combination of quantitative and qualitative methods. There will be language restrictions in the selection of the studies, and the survey and interview sample will include only subjects speaking English or Chinese. Both restrictions may limit the generalizability of our results.
Robot visual place recognition using COG_SC descriptor
Authors: YE Minying , LI Dingrui , GUO Dedi , IWATA Daiki , NODA Yudai , TSUKAHARA Kenta , Liang Jonathan Tay Yu , XIE Xingguang 
Published: May 2024

Abstract

One of the most active research areas in robotics is visual place recognition using a 3D laser Lidar. A promising research direction involves learning and recognition of scene descriptors, such as scan context descriptors. These descriptors map 3D point clouds to 2D point clouds. Although the scan-context descriptor has a high recognition performance, it is still expensive image data and cannot be handled with low-capacity non-deep models. To address this, we have developed a novel feature descriptor by combining COG (center of gravity) with scan-context descriptor.
Effluence of thymol content by supercritical fluid extraction system from ajwain (Trachyspermum ammi L.)
Authors: N.R. Sardar , R.V. Prasad , H.G Bhatt , K.S. Damle 
Published: June 2024

Abstract

Supercritical fluid extraction has emerged as a highly efficient and selective method for extracting essential oils from spices. The aim of this study was to investigate the outcomes of supercritical fluid extraction in terms of both yield and extraction of valuable essential oil from ajwain. Factors such as temperature (35 to 55°C), pressure (100 to 300 bar), dynamic duration (30 to 150 min), and static time (30 to 90 min) were evaluated to determine the concentration of thymol through the use of a central composite design for supercritical fluid extraction, and the extraction process was optimized. The optimal factors were found to be 35°C, 300 bar pressure, 65 minutes of dynamic time, and 30 minutes of static time. The essential oil yield with a thymol content of 60% was 3.9%.
Wheel path planning for flute grinding of non-cylindrical solid end-mills based on circular arc projection
Authors: Ren Lei , Zhang Zheng , Li Yong , Xiang Daohui , Ma Junjin , Cui Xiaobin 
Published: June 2024

Abstract

Flute grinding is a crucial process in solid end-mill manufacturing, because the generated flute parameters, i.e. helix angle, rake angle, core radius, and flute width, have significant effects on the cutting performance of end-mills. However, the flute grinding of non-cylindrical solid end-mills is still challenging due to the variable flute parameters along the tool axis. This paper proposes an accurate and efficient method of wheel path planning for flute grinding of non-cylindrical solid end-mills based on circular arc projection. The wheel path determined by the new method can accurately generate the designed variable helix angle, variable rake angle, variable core radius, and variable flute width. The rake angle is guaranteed by the conjugate condition between the wheel surface and the cutting-edge curve. Equivalent errors of core radius and flute width are introduced in this work based on circular arc projection. The accuracy of the two parameters is ensured by minimizing the sum of squares of the two equivalent errors. Simulations and experiments are conducted to validate the method. Three types of non-cylindrical end-mills i.e. tapered end-mill, tapered barrel end-mill, and barrel end-mill, are considered in the validation. The measured results indicate that the generated flute parameters coincide well with the designed ones at different axial positions of the end-mills.
Heterogeneous electro-Fenton removal of polyacrylamide in aqueous solution over CoFe2O4 catalyst
Authors: Xu Shanshan , Yang Yi , Li Fanxiu 
Published: June 2024

ABSTRACT

Polyacrylamide (PAM) in environmental water has become a major problem in water pollution management due to its high molecular mass, high viscosity and non-absorption by soil. CoFe2O4 with strong magnetic properties was prepared by solvent-thermal synthesis method and used as the catalyst for the removal on PAM in heterogeneous Electro-Fenton (EF) system. It showed that the removal efficiency of PAM by the heterogeneous EF system using CoFe2O4 catalyst was 92.01% at pH 3 after 120 min. Further studies indicated that ·OH was the most significant active species for the removal of PAM, and the contribution of ·O2− and SO4·− for the removal of PAM was less than 15%. The reusability test and XRD, XPS, FTIR analyses proved that the catalyst had good stability. After a repeated use for five times, the catalyst still had a high PAM removal rate and stable structure. The valence distribution and functional groups of the phase components of the catalyst did not change significantly before and after the reaction. The possible mechanism of catalyst activation of H2O2 was deduced by mechanism investigation. The CoFe2O4 is an efficient and promising catalyst for the removal of PAM wastewater.
Cone Beam Computed Tomography Analysis of Post Space in Bifurcated Premolars Using ParaPost and Peeso Reamer Drills
Authors: Alqahtani Abdulaziz Saleh , Almonabhi Omar Nasser , Almutairi Abdulmajeed Moh. , Alnatsha Reem R. 
Published: June 2024

Introduction
Core buildups are usually maintained by the usage of posts. Even so, in curved and narrow canals, such as bifurcated premolars, excessive dentin removal during post-space preparation can result in a vertical root fracture or perforation. In order to preserve root canal dentin during post-space preparation of bifurcated premolars, this study examined and analyzed the effects of two widely used drills: Peeso Reamer (Dentsply Maillefer, Ballaigues, Switzerland) and ParaPost (Coltene/Whaledent, Inc., Altstätten, Switzerland). We also examined the risks associated with using Cone-beam Computed Tomography (CBCT).

Methods
Three operators with varying levels of experience treated a total of 72 removed bifurcated premolars, dividing them into equal groups. The rotary ProFile system (Dentsply Sirona, Charlotte, NC) was utilized for root canal treatments, and gutta-percha size #30/0.4 was used for obturation. Peeso Reamer #2 and ParaPost #1 were then used to prepare the palatal canals. CBCT was used to assess the total mean intracanal spaces of 3 mm, 5 mm, and 7 mm that were measured both preoperatively and postoperatively. To compare the mean dentin thickness within the canal area across all groups, we used analysis of variance testing. We detected complications, like deviations or perforations, using mesiodistal periapical radiographs.

Results
When utilizing the Peeso Reamer, the mean dentin thickness (0.749 mm) was slightly more than when using the ParaPost (0.736 mm) with p=0.16. There was no significant difference in the mean dentin thickness of the canal area between the Peeso Reamer and the ParaPost drills. The Pesso Reamer drill had fewer complications since it matched the canal configuration, while the Parapost drill removed somewhat more dentin in the canal area. Only seven teeth with minimum deviation from the center of the canal during preparation were produced by the Peeso Reamer drill (20% of teeth having deviation), whereas twenty-one teeth had deviations (72.2% of teeth) and eight had furcal perforations generated by the ParaPost.

Conclusion
Within the limitations of our study, the Pesso Reamer drill caused little more dentin removal than the ParaPost drill. However, the Peeso Reamer had fewer risks and was safer to use in bifurcated premolars. The ParaPost drill is not recommended in bifurcated premolars due to the high risks of deviation and perforation because they have narrow canals. The selection of an appropriate drill for post-space use in bifurcated premolars is essential for successful patient outcomes.
Disharmonisasi Keluarga : Pemicu Timbulnya Perilaku Lesbian Dalam Diri Remaja
Authors: Zahra Fadia , Wilodati Wilodati , Wahyuni Sri 
Published: June 2024

Penyimpangan orientasi seksual lesbian bukanlah perilaku yang muncul secara spontan tanpa sebab. Dianalisis faktor disharmonisasi dalam keluarga, dimana terdapat ketidakselarasan fungsi di dalam sebuah keluarga. Kegagalan satu atau beberapa anggota keluarga dalam menjalankan kewajiban peran mereka menyebabkan kondisi retaknya struktural peran sosial dalam suatu unit keluarga. Peranan yang negative dari ketidakharmonisan keluarga terhadap perkembangan sosial anak mempengaruhi perkembangan kecakapan-kecakapan anak, salah satunya adalah gangguan emosional dan perilaku penyimpangan orientasi seksual. Penelitian ini menggunakan pendekatan kualitatif dengan metode studi kasus yang bertujuan untuk memahami pengalaman dan persepsi remaja lesbian secara lebih mendalam dan kontekstual. Penelitian ini melibatkan remaja pelaku lesbian dan orangtua dari remaja lesbian tersebut dengan menggunakan teknik wawancara mendalam. Hasil penelitian menunjukkan bahwa ditemukan disharmonisasi keluarga sebagai pemicu dan latar belakang remaja menjadi lesbian secara terperinci sebagai berikut: (1). Konflik dan pertengkaran orangtua, (2). Peran Ayah yang tidak ideal, (3). Trauma melihat pengalaman keluarga dan saudara, (4). Pola asuh orangtua yang tidak efektif. Kondisi tersebut menyebabkan remaja mencari kenyamanan diluar rumah dengan jalan yang tidak baik, sehingga berdampak pada: (1). Gangguan emosional, (2). Masalah perilaku (3). Rendahnya harga diri dan rasa percaya diri, (4). Gangguan kesehatan, (5). mencapai dalam membentuk hubungan sosial, (6). Respons kesadaran beragama anak. Peran keluarga dalam kehidupan anak sangat penting dan berpengaruh pada perkembangan anak secara keseluruhanKata kunci : disharmonisasi, lesbian, , pola asuh orangtua, remaja
Penggunaan model guided writing untuk meningkatkan kemampuan menulis tegak bersambung pada siswa kelas 2 SD Al Basyariyah
Authors: Suwijaya Lika Agustin , Samsudin Asep , Setiyadi Ruli 
Published: June 2024

Â Â Â Â Â Â Â Â Â Â Â Â Â Penelitian ini bertujuan untuk menelaah pembelajaran menulis tegak bersambung pada siswa kelas 2 SD Al Basyariyah dengan menggunakan model guided writing. Metode penelitian yang digunakan yaitu mix method. Subjek pada penelitian ini yaitu 25 orang siswa pada kelas 2 SD Al Basyariyah yang terdiri dari 15 siswa perempuan dan 10 siswa laki-laki. Instrumen penelitian berdasarkan hasil observasi dan angket siswa mengenai proses pembelajaran yang berlangsung selama masa penelitian dengan menggunakan model guided writing. Dari hasil penelitian yang dilakukan, dan berdasarkan pembahasan yang mendeskripsikan seluruh proses pembelajaran yang dilakukan selama penelitian, dapat disimpulkan bahwa terdapat peningkatan kemampuan siswa baik itu selama proses pembelajaran, hal ini dapat diketahui dari hasil posr test dan pretwst serta observasi yang dilakukan. Berdasarkan skenario dan implementasi keterampilan siswa terdapat peningkatan kemampuan yang signifikan. Respon siswa sangat baik dalam proses penelitian yang berlangsung. Kendala maupun kesulitian yang dihadapi siswa selama masa penelitian adalah sulit berkonsentrasi dan mengganggu teman
MENGATASI KESULITAN DALAM MENGAMBIL KEPUTUSAN KARIR MENGGUNAKAN PENDEKATAN TRAIT AND FACTOR
Authors: Manasikana Arina , Kiswantoro Arista , Sumarwiyah Sumarwiyah 
Published: June 2024

The purpose of the research conducted was to find factors that cause students to experience difficulties in career decision making and help overcome difficulties in career decision making. This research uses a trait and factor approach. This type of research is qualitative case study. The research subjects were students of class XI electronics and XII graphical production at SMK N 1 Kalinyamatan. The data collection techniques used are observation, interview, and documentation techniques. The data analysis used is flow data analysis or flow (flow model analysis). The results of the study prove that the application of the Trait and Factor approach with the problem of difficulty in making student career decisions is effective in dealing with these problems. The problems of counselee I and counselee II have the same causal factors, which are differences of opinion with parents and the family economy and not knowing their talents and interests and not knowing about the world of work. The implementation of the trait and factor approach to the problem can be handled well, the counselee can make career decisions about his future and understand the consequences of the choices he makes.
Benefits of Alginate and Spirulina Supplementation to the Growth and Resistance Against Salinity Exposure in Litopenaues vannamei Post-Larvae
Authors: Yudiati Ervia , Kurniawan Putri Nadhira Rachmani , Putri Alifia Nabilla , Falah Inda Hawa Al , Azhar Nuril , Sedjati Sri , Arifin Zaenal , Santosa Gunawan Widi 
Published: May 2024

Abstract

Litopenaeus vannamei, a highly adaptable shrimp species known for its growth, thrives in environmental conditions with proper water quality. However, salinity stress poses a significant challenge, compromising shrimp survival and growth. To optimize shrimp feed, the inclusion of alginate and Spirulina sp. offers benefits such as enhanced growth and resistance to environmental stress. This research aims to assess the impact of adding Spirulina sp., alginate, and their combination on the survival rate, resistance to the salinity shock test, and growth of L. vannamei. In this study, a completely randomized design (CRD) method with nine different feed doses was used. The treatments included control, supplementation of Alg 1 (alginate 1 g/kg feed), Alg 3 (alginate 3 g/kg feed), Alg 5 (alginate 5 g/kg feed), Sp 3 (spirulina 3 mg/kg feed), Sp 6 (spirulina 6 mg/kg feed), Sp 9 (spirulina 9 mg/kg feed), AS 1+1 (alginate 1 g/kg feed + spirulina 1 mg/kg feed), AS 2+3 (alginate 2 g/kg feed + spirulina 3 mg/kg feed), and AS 3+5 (alginate 3 g/kg feed + spirulina 5 mg/kg feed). The supplementation of feed was given during the fourteen-day rearing period. The results of the study show that the supplementation of Sp 9 (spirulina 9 mg/kg feed) led to a significant growth (α = 0.05). All treatments supplemented with alginate and/or Spirulina sp. water extract had a significant effect (α = 0.05) on the resistance to the salinity shock test. The different treatments in L. vannamei feed supplementation significantly influenced (α = 0.05) shrimp survival. Polysaccharides and antioxidant properties in alginate and Spirulina sp. have an important role in increasing the growth and resistance to salinity shock of L. vannamei.