bluuebunny/crossref_metadata_2025_split huggingface dataset:
Accuracy and precision of cementless and cemented stem placement using CT-based navigation.
Authors: Hiraiwa Toshihito , Tokunaga Kunihiko 
Published: March 2024

Few surgeons use computer assisted surgery for stem placement in THA because its accuracy is notsufficient rather than that for acetabular cup placement. Recently, cemented stem can be available in CT- based navigation, however, accuracy and precision of cemented stem alignment has not been reported. We compared accuracy and precision between cementless and cemented stems using the same CT-based navigation (Stryker hip navigation). We analyzed 43 cases (10 men, 33 women; average age 69.3 years) using cementless and cemented stem (Accolade II stem and Exeter stem [Stryker]) after CT-based navigation assisted THA. The differences (average ± standard deviation of absolute values) between the pre- and post-operative angles of stem anteversion were 3.8 ± 3.0° in the cementless group, and 2.4±1.8° in cemented group, respectively. There was a significant difference in precision in stem anteversion between the two groups. The accuracy and the precision of stem anteversion using the taper-wedge stem in this study was comparable to the previous reports using CT-based navigation. However, the precision of stem alignment with cemented stems was more accurate. When we used cemented stem, stem alignment consisted of 4 factors (stem flexion, varus, anteversion, and depth) could be completely controlled by checking the numbers on the navigation screens until bone cement hardened. Therefore, precision of cemented stem alignment using CT-based navigation are more accurate than that of cementless stems.
nnU-Net for the Automatic Knee Segmentation from CT Images: A Comparative Study with a Conventional U-Net Model
Authors: Maintier Ludivine , Clavé Arnaud , Maguet Ehouarn , Stindel Eric , Burdin Valérie , Dardenne Guillaume 
Published: March 2024

This study aims at comparing the nnU-Net, an open-source deep learning framework, with a previous customized U-Net model that we developed for the automatic segmentation of tibial and femoral bones from CT scans. The main purpose of our work is to develop a segmentation module that could be integrated into a surgical planning software for the design of customized Total Knee Prosthesis. The nnU-Net framework was chosen for its user-friendly design and features developed for medical imaging.The same dataset of 112 CT scans of lower limbs from 63 patients was used to train and test both our customized U-Net model and the nnU-Net model. All these data were manually annotated. The evaluation was done by computing the Average Symetric Surface Distance, the Dice Coefficient, the Hausdorff Distance, the precision, the recall and the Jaccard Index. Both models yielded similar results on these metrics, but the nnU-Net model is easier to setup.The performances of both models are also consistent with the literature, however, further tests on pathological data will be needed.
PERANCANGAN DAN IMPLEMENTASI SECURITY DAN SISTEM KENDALI OTOMATIS SMART HOME MENGGUNAKAN NODEMCU
Authors: Setiady Kevin Wijaya , Ginting Jusia Amanda 
Published: March 2024

<p>Kondisi ekonomi yang semakin sulit pada masa pandemi COVID-19 menjadi alasan utama tingkat kriminalitas. Salah satunya adalah pencurian yang terjadi di perumahan. Kadang-kadang kelalaian pemilik rumah dalam memeriksa celah menjadi celah bagi para pelaku untuk melakukan pencurian, dengan membuat sistem keamanan dapat menjadi solusi atas masalah diatas karena penelitian ini dilakukan untuk mengatasi masalah keamanan tersebut dengan alat yang diharapkan dapat memberikan sistem dan kenyamanan terhadap pemilik rumah. <br /> Alat keamanan berupa sensor-sensor yang dipasang pada bagian gerbang, pintu depan, dan jendela. Sensor ini akan berfungsi dengan cara mengirim notifikasi ke <em>smartphone</em> pemilik rumah ketika sensornya terpicu. Pengujian prototipe dilakukan guna mengetahui kesalahan dan kekurangan dari rancangan sistem sehingga memudahkan dalam perbaikan.</p><p>Hasil pengujian menunjukkan bahwa mikrokontroler yang digunakan seperti esp32-cam &amp; nodemcu mampu mengendalikan sensor pir, <em>relay</em>, <em>solenoid doorlook, laser</em> sensor, ldr sensor dan <em>magnetic</em> sensor dengan baik dan berjalan sesuai dengan fungsi yang ditujukan yaitu membangun sistem keamanan. Implementasi dalam memasang sensor sebagai salah satu cara untuk melakukan pencegahan terjadinya pencurian rumah bisa menjadi pertimbangan dalam melindungi rumah.</p><p>Kata Kunci: </p>
The treatment of error in learners of Russian as a foreign language: Visual analytics
Authors: González-Hidalgo Inés de los Ángeles , Barros García Benamí , Arroyo-Machado Wenceslao 
Published: March 2024

There are well-known challenges in the assessment of learning in general, and especially in foreign language learning. The treatment of error in the classroom is a recent topic of research and one that has given rise to multiple approaches to pinpoint, identify and classify the errors made by learners of foreign and second languages. This article presents a methodological model based on visual analytics and education data mining to optimise teacher intervention in the face of individual and collective errors in the Russian language classroom. The methodology has been tested on learners of Russian as a foreign language at the University of Granada. It comprised an online questionnaire for skills assessment, with 75 questions that were classified by grammatical category and sub-category. It was filled out by the learners of the 2021/2022 academic year, yielding 31 responses. The responses were then analysed through visual analytics and education data mining techniques. Clustering questions and learners allowed the identification of different error patterns and groups of learners with common errors. This serves to demonstrate the usefulness of these techniques for classroom assessment.
Multilingual Crowdsourcing Motivation on Global Social Media. Case Study: TED OTP
Authors: Cámara de la Fuente Lidia 
Published: March 2024

Crowdsourcing has emerged in recent year as a new form of volunteering activity. The distributed nature of online volunteers enabled global organizations to mobilize talents from around the world. In this spirit, the past decade has witnessed a vibrant expansion of intercultural virtual collaborative efforts within the crowdsourced audiovisual translation communities. The aim of our work is to characterise key motivational factors driving volunteer translators to engage in these intercultural collaboration endeavours within one of those virtual communities. As a case in point, I will study TED[1], a global communication platform where people from all over the world interact with each other creating, sharing, exchanging and commenting on content within a virtual community and several networks. At TED unpaid volunteers translate audiovisual content into 100 languages, within the framework of an online translation project: the Open Translation Project, hereinafter referred to as OTP. I asked a group of 177 OTP participants who range across 35 different languages and are geographically distributed over four continents, to pinpoint key motivation factors for becoming volunteer translators. [1] TED stands for Technology, Entertainment and Design
A Strong Gram Classification of Non-negative Unit Forms of Dynkin Type 𝔸r
Authors: Jiménez González Jesús Arturo 
Published: March 2024

An integral quadratic form q : ℤ n → ℤ is usually identified with a bilinear form [Formula: see text] satisfying [Formula: see text] for any vector x in ℤ n, and such that its Gram matrix with respect to the canonical basis of ℤ n is upper triangular. Two integral quadratic forms are called strongly (resp. weakly) Gram congruent if their corresponding upper triangular bilinear forms (resp. their symmetrizations) are equivalent. If q is unitary, such upper triangular bilinear form is unimodular, and one considers the associated Coxeter transformation and its characteristic polynomial, the so-called Coxeter polynomial of q with this identification. Two strongly Gram congruent quadratic unit forms are weakly Gram congruent and have the same Coxeter polynomial. Here we show that the converse of this statement holds for the connected non-negative case of Dynkin type 𝔸 r ( r ≥ 1) and arbitrary corank, and use this characterization to complete a combinatorial classification of such quadratic forms started in [Fundamenta Informaticae 184(1):49–82, 2021] and [Fundamenta Informaticae 185(3):221–246, 2022].
Assessment of thermographic tools for the validation of physics-based models of an induction sealing process
Authors: Giangolini Matteo , Betti Beneventi Giovanni , Babini Andrea 
Published: March 2024

Measure of temperature dynamics in induction sealing processes is of paramount importance for the validation of physics-based models. In this work, commonly used commercial tools for temperature measurements, such as thermocouples, pyrometers and thermal cameras, are benchmarked for the characterization of the temperature dynamics occurring in multilayer aluminum foil-based packaging material undergoing relatively fast (i.e., ×100 ms) induction heating transients.
ANÁLISE DA DISTRIBUIÇÃO E ABUNDÂNCIA DAS ESPÉCIES DE ARRAIA Dasyatis geijskesi E Dasyatis guttata, CAPTURADAS COM REDE DE ARRASTO PARA PEIXE, EM PESCARIAS EXPERIMENTAIS NA COSTA NORTE DO BRASIL
Authors: Holanda Francisco Carlos A. Fonteles , Santos Francisco José da Silva , Filho Mutuso Asano 
Published: March 2024

Entre os meses de fevereiro de 1998 e dezembro de 1999, foram realizados seis cruzeiros a bordo do navio de pesquisa Almirante Paulo Moreira, pertencente ao CEPNOR/IBAMA. O mesmo utiliza como apetrecho de pesca, rede de arrasto de fundo, abertas por portas de ferro. Durante os trabalhos foram coletados dados referentes a abundância e distribuição de duas das principais espécies de arraias capturadas, pertencentes à família Dasyatidae e ambas com ampla distribuição ao longo da costa. Dasyatis geijskesi , em bora seja uma espécie restrita ao Norte do Brasil, não mostrou capturas significativas. Durante as análises, o que ficou constatada foi a predominância da espécie Dasyatis guttata , com aproximadamente 90% da captura total em peso. Com relação à sazonalidade, as maiores capturas aconteceram durante o período seco, entre os meses de agosto e dezembro. Para o estudo da distribuição das espécies na coluna d’água, foram estabelecidos três estratos de profundidades (< 50 m, entre 50 m e 100 m e > 100 m), nos quais foram analisa das CPUE e CPUA, obtendo-se 338,00 kg/hora e 18,56 kg/ha, respectivamente, sendo os maiores valores encontrados em profundidades acima de 100 m, para a espécie D. guttata
Posting on „Nie szczepimy („We don’t vaccinate”) Internet forum
Authors: Cianciara D , Szmigiel A 
Published: March 2024

<p>ABSTRACT</p>
<p>INTRODUCTION. In Poland, there is a visible strengthening of hesitant attitudes towards vaccination, as well as institutionalization and politicization of hesitancy. The Internet is an important source of information about vaccinations. People who are looking for such information can find negative opinions on the web, so it is important to keep track of the content there. There is no national research on Internet anti-vaccination content.<br />AIM. To examine posting on the online forum “Nie szczepimy” (We don’t vaccinate).<br />MATERIAL AND METHODS. The number of new users and new posts in the years 2008-2018 was examined, as well as the type of content and design of the selected 407 posts from 2009-2015. Categories according to Wolfe RM et al. (2002) were used for coding content and design of posts.<br />RESULTS. The number of users and posts was increasing for the first four years and then started to decrease. The most frequently discussed topic was the relation between vaccination and idiopathic illnesses (26.1%). The most common design was providing links to anti-vaccine sites (29.9%)<br />CONCLUSIONS. The content of the posts is very diverse and shows numerous users’ doubts. A significant part of the posts had a strongly emotional form. It would be important to regularly monitor various services and forms of communication on the Internet in terms of the content of anti-vaccinaton information.</p>
<p>STRESZCZENIE</p>
<p>WSTĘP. W Polsce widoczne jest umacnianie sceptycznych postaw wobec szczepień, a także instytucjonalizacja i upolitycznienie sceptycyzmu. Internet jest ważnym źródłem informacji o szczepieniach. Osoby, które szukają takich informacji mogą znaleźć w sieci opinie negatywne, dlatego ważne jest śledzenie zawartych tam treści. Nie ma krajowych badań na temat treści w Internecie będących w opozycji wobec szczepień<br />CEL PRACY. Charakterystyka tzw. postowania (tj. zamieszczania postów, czyli wiadomości) na forum internetowym „Nie szczepimy”.<br />MATERIAŁ I METODY. Badano liczbę nowych użytkowników i nowych postów na forum w latach lat 2008-2018 oraz rodzaj treści i formy wybranych 407 postów z lat 2009-2015. Do analizy treści i formy zastosowano klucz wg Wolfe RM i wsp. (2002).<br />WYNIKI. Liczba użytkowników i postów zwiększała się przez pierwsze cztery lata, a następnie malała. Najczęściej poruszaną tematyką był związek szczepień z chorobami idiopatycznymi (26,1%). Najczęstszą formą było podawanie linków do stron antyszczepionkowych (29,9%).<br />WNIOSKI. Treść postów jest bardzo różnorodna i pokazuje liczne wątpliwości użytkowników. Znaczna część postów miała silnie emocjonalną formę. Ważne byłoby regularne monitorowanie różnych usług i form komunikacji w Internecie pod kątem zawartości informacji antyszczepionkwoych.</p>
Hunting, Planting and Malaria: How Cameroonian Ecosystems Changed the Basel Missionaries’ Worldviews
Authors: Lunkwitz Diana 
Published: March 2024

How did the land change the missionary? Almost all early missionaries, sent by the Basel Mission to the African colony Kamerun of the German Empire, died of malaria ( Klimafieber). On the fourth day after arrival in 1886 the first missionary died. In any case, Cameroonian ecosystems reshaped the self-conception and worldviews of missionaries. They used hunter's language, romanticised and conquered the land and its imagined virgin forests; Basel missionaries became strangers to themselves – involved in plantation policy, violent against, but at the same time absolutely dependent on, the local population.Most anthropological or historical studies on the Basel Mission and other Protestant missions in Cameroon focus on politics, economics, education and how the missionaries did change the land. However, how African agency influenced missionaries’ perspectives and activities is rarely acknowledged or discussed, which has so far limited historiographical works to a humanocentric understanding of mission.The article explores how the worldviews of the missionaries (especially Friedrich Autenrieth, Paul Steiner and Heinrich Norden) were challenged by the natural environment. In particular, it investigates how concepts of God, mission, culture/nature and human were renegotiated and reshaped while working and travelling the land. This analysis of printed travelogues, novels and articles therefore combines the question of the missionaries’ reactions to climate, disease, fauna, flora and the montane environment with an examination of how these were presented to specific target groups.To concentrate on the agency of African ecosystems consequently decentres the historiography of Christian mission that has separated the human from the non-human agency of nature.1
Organic mass and protein extraction from secondary sewage sludge via multi-step physical alkali- and acid-based treatment
Authors: Skripsts Eriks , Klaucans Elvis , Mezule Linda 
Published: March 2024

The perception of sewage sludge has been shifting from waste to resource, leading to various technological proposals for its management and resource recovery. This study explores a two-step sewage sludge treatment using different pathways—physical-alkali followed by physical-acid, and physical-acid followed by physical-alkali hydrolysis—to understand the efficiency of organic matter (OM) and Kjeldahl nitrogen extraction, and protein solubilization. Hydrolysis of the sewage sludge was performed with 3 M H2SO4 and 2.8 M NaOH and combined with physical treatment—thermal, ultrasonication, microwave irradiation, and cavitation. The results showed that cavitation chemical hydrolysis in an alkaline environment (CCH-alkali) extracted the highest amount of OM—up to 79.0%. When further cavitation chemical hydrolysis in an acid environment (CCH alkali–acid) was performed, OM extraction reached 90.2%. Physical-alkali treatment showed better performance in resource recovery from secondary sludge (SS) in both treatment steps. The highest protein extraction rate of 23,046 mg/L in the supernatant was obtained using SS treatment with microwave chemical hydrolysis in an alkaline environment (MCH-alkali). Although physical-acid treatment resulted in reduced protein solubilization and OM extraction, it provides a higher protein hydrolysis rate. Organic nitrogen compounds were better extracted with thermal-alkali treatment, reaching 95.3% removal. The study showed that different physical treatment methods demonstrate selective resource recovery or extraction performance.
An ultra-sensitive biosensor based on surface plasmon resonance and weak value amplification
Authors: Zhang Lizhong , He Mingyi , Xu Yang , Guo Cuixia , Zhou Chongqi , Guan Tian 
Published: March 2024

An ultra-sensitive phase plasmonic sensor combined with weak value amplification is proposed for the detection of IgG, as a model analyte. Phase detection is accomplished by self-interference between the p-polarization and the s-polarization of the light. With the principles of weak value amplification, a phase compensator is used to modulate the coupling strength and enhance the refractive index sensitivity of the system. On a simple Au-coated prism-coupled surface plasmon resonance (SPR) structure, the scheme, called WMSPR, achieves a refractive index sensitivity of 4.737 × 104 nm/RIU, which is about three times higher than that of the conventional phase-based approach. The proposed WMSPR biosensor gives great characteristics with a high resolution of 6.333 × 10−8 RIU and a low limit of detection (LOD) of 5.3 ng/mL. The results yield a great scope to promote the optimization of other SPR biosensors for high sensitivity.
Adaptation and psychometric properties of a brief version of the general self-efficacy scale for use with artificial intelligence (GSE-6AI) among university students
Authors: Morales-García Wilter C. , Sairitupa-Sanchez Liset Z. , Morales-García Sandra B. , Morales-García Mardel 
Published: March 2024

BackgroundIndividual beliefs about one’s ability to carry out tasks and face challenges play a pivotal role in academic and professional formation. In the contemporary technological landscape, Artificial Intelligence (AI) is effecting profound changes across multiple sectors. Adaptation to this technology varies greatly among individuals. The integration of AI in the educational setting has necessitated a tool that measures self-efficacy concerning the adoption and use of this technology.ObjectiveTo adapt and validate a short version of the General Self-Efficacy Scale (GSE-6) for self-efficacy in the use of Artificial Intelligence (GSE-6AI) in a university student population.MethodsAn instrumental study was conducted with the participation of 469 medical students aged between 18 and 29 (M = 19.71; SD = 2.47). The GSE-6 was adapted to the AI context, following strict translation and cultural adaptation procedures. Its factorial structure was evaluated through confirmatory factorial analysis (CFA). Additionally, the factorial invariance of the scale based on gender was studied.ResultsThe GSE-6AI exhibited a unidimensional structure with excellent fit indices. All item factorial loads surpassed the recommended threshold, and both Cronbach’s Alpha (α) and McDonald’s Omega (ω) achieved a value of 0.91. Regarding factorial invariance by gender, the scale proved to maintain its structure and meaning in both men and women.ConclusionThe adapted GSE-6AI version is a valid and reliable tool for measuring self-efficacy in the use of Artificial Intelligence among university students. Its unidimensional structure and gender-related factorial invariance make it a robust and versatile tool for future research and practical applications in educational and technological contexts.
Benign Brenner tumor of the ovary: two-dimensional and contrast-enhanced ultrasound features—a retrospective study from a single center
Authors: Chen Mei , Liao Shusheng , Cao Yong , Mao Meiya , Jia Xiupeng , Zhang Shengmin , Xu Youfeng 
Published: March 2024

ObjectiveBenign Brenner tumor (BBT) is a rare ovarian tumor, and there are few discrete reports about its manifestation in an ultrasound. This study sought to investigate the two-dimensional (2D) and contrast-enhanced ultrasound (CEUS) features of this entity.MethodsThis is a retrospective single-center study. The clinical manifestations, laboratory examination, and ultrasound data of 25 female patients with BBT were confirmed by pathology when they underwent 2D and/or CEUS examination at Ningbo First Hospital from January 2012 to June 2023. The ultrasound findings of the patients were analyzed using the terminology of the International Organization for the Analysis of Ovarian Tumor and were read by two senior sonographers who reached an agreement.ResultsAmong the all 25 patients, most of them were unilateral, and only one patient was bilateral. Thus, 26 lesions were found: 44.0% (11/25) were in the left and 52.0% (13/25) were in the right. Moreover, 53.84% (14/26) were solid lesions, 15.38% (4/26) were mixed lesions, and 26.92% (7/26) were cystic lesions. Among the solid-type patients, 42.85% (6/14) of the cases were with calcification. Upon laboratory examination, 12.0% (3/25) of the patients had high carbohydrate antigen 125 (CA-125) level, and 19.04% (4/21) of the patients had an elevated carbohydrate antigen724 (CA-724) level in the serum tumor markers. In the hormone test, 14.28% (3/21) were found to have a high postmenopausal estrogen level and 14.28%(3/21) were found to have a high level of follicle-stimulating hormone (FSH). One patient with complex manifestations and three with solid manifestations were examined by CEUS to observe the microcirculation perfusion of the tumor. One with solid and cystic separation was rapidly hyperenhanced and cleared, and the filling subsided faster than the uterus. The postoperative pathological diagnosis was benign Brenner tumor with mucinous cystadenoma. The other three cases were solid adnexal lesions, which showed isoenhancement on CEUS and disappeared slowly, synchronizing with the uterus. The CEUS results were considered as benign tumors and confirmed by pathology.ConclusionsBBT can show ovarian cystic, mixed cystic and solid type, and solid echo in 2D ultrasound. Unilateral ovarian fibrosis with punctate calcification is an important feature of BBT in 2D ultrasound. However, for solid adnexal masses and mixed cystic and solid masses with unclear diagnosis, if CEUS shows isoenhancement or hyperenhancement, the possibility of BBT cannot be excluded.