bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of Transitioning From In-Person to Virtual Heart Transplantation Selection Committee Meetings: Observational Study
Authors: Shan Rongzi , Chandra Neha V , Hsu Jeffrey J , Fraschilla Stephanie , Moore Melissa , Ardehali Abbas , Nsair Ali , Parikh Rushi V 
Published: March 2022

Background
Heart transplant selection committee meetings have transitioned from in-person to remote video meetings during the COVID-19 pandemic, but how this impacts committee members and patient outcomes is unknown.

Objective
The aim of this study is to determine the perceived impact of remote video transplant selection meetings on usability and patient care and to measure patient selection outcomes during the transition period from in-person to virtual meetings.

Methods
A 35-item anonymous survey was developed and distributed electronically to the heart transplant selection committee. We reviewed medical records to compare the outcomes of patients presented at in-person meetings (January-March 2020) to those presented during video meetings (March-June 2020).

Results
Among 83 committee members queried, 50 were regular attendees. Of the 50 regular attendees, 24 (48%) were physicians and 26 (52%) were nonphysicians, including nurses, social workers, and coordinators; 46 responses were received, 23 (50%) from physicians and 23 (50%) from nonphysicians, with 41 responses fully completed. Overall, respondents were satisfied with the videoconference format and felt that video meetings did not impact patient care and were an acceptable alternative to in-person meetings. However, 54% (22/41) preferred in-person meetings, with 71% (15/21) of nonphysicians preferring in-person meetings compared to only 35% (7/20) of physicians (P=.02). Of the 46 new patient evaluations presented, there was a statistically nonsignificant trend toward fewer patients initially declined at video meetings compared with in-person meetings (6/24, 25% compared to 10/22, 45%; P=.32).

Conclusions
The transition from in-person to video heart transplant selection committee meetings was well-received and did not appear to affect committee members’ perceived ability to deliver patient care. Patient selection outcomes were similar between meeting modalities.
Formación del profesorado, enseñanza y evaluación. Experiencias de estudiantes portugueses
Authors: Pinheiro Cláudia , Flores Maria Assunção , Cristóvão Francisco 
Published: March 2022

Este artículo, procedente de un estudio más amplio, trata de comprender cómo los estudiantes que serán futuros profesores describen su experiencia en un curso de formación de profesores, concretamente en lo que respecta a las prácticas de enseñanza y evaluación. Los datos fueron recolectados a través de grupos focales con 30 estudiantes inscritos en un curso en el área de docencia. Los resultados apuntan a la prevalencia de prácticas docentes más tradicionales y a la falta de articulación entre la teoría y la práctica, aunque también hay aspectos que hacen referencia a diferentes grados de implicación de los alumnos en las actividades del aula y a diferentes dinámicas de interacción entre profesores y alumnos. Aunque los participantes destacan la importancia de la diversidad de los métodos de evaluación, y algunos admiten la relevancia de los portafolios y la retroalimentación oportuna y pertinente, sobresale el predominio de los exámenes y el trabajo en grupo.
Evaluation of effective factors on pain in patients undergoing sleep apnea surgery
Authors: Heidari Reihaneh , Najafzadeh Mahsa , Erfaniyan Reza , Razmpa Ebrahim , Emami Hamed , Heidari Matineh 
Published: March 2022

Objectives: The aim of this study was to investigate the factors affecting postoperative pain.
Methods: This descriptive cross-sectional study was performed on patients referred to the hospital to determine the factors affecting postoperative pain for patients with obstructive sleep apnea (OSA). Patients' information was recorded: age, sex, weight, height, body mass index, duration of surgery, possible complications, and anesthesia. Patients were evaluated for pain according to VAS criteria. The first time a patient requested a drug was recorded in 24 hours after surgery and data was then analyzed.
Results: A total of 40 patients were enrolled in the study, including 14 women (35%) and 26 men (65%). The mean age of patients was 41.55 ± 7.43 years. Examination of the relationships between other variables with patients' pain intensity showed a statistically significant difference between patients' pain intensity with other variables such as history of stroke (P = 0.005), history of cardiovascular disease (P = 0.048), history of drug abuse (P = 0.046) and type of analgesia received after surgery (P = 0.032). In multivariate analysis of the studied data, no statistically significant relationship was found between any of the variables with the intensity of patients' postoperative pain. The variances of height, weight, body mass index, duration of surgery and the first time of application of analgesic after surgery did not differ in different groups of pain intensity variables. But a significant difference was found between the two variables of age and pain intensity of patients (P <0.05).
Conclusion: The results of this study showed a statistically significant difference in pain intensity with a history of stroke, cardiovascular disease, history of drug abuse and also the type of analgesia received after surgery. The serious complications caused by tolerating acute postoperative pain, especially the long-term effects of experiencing severe pain, necessitates more attention to pain control.
Formulasi Masker Gel Peel-Off Berbahan Ekstrak Biji Kopi Robusta (Coffea canephora) Khas Lampung
Authors: Yasir Angga Saputra , Suryaneta Suryaneta , Fahmi Achmad Gus , Saputra Iwan Syahjoko , Hermawan Dessy , Berliyanti Rery Tri 
Published: March 2022

Kopi robusta (Coffea canephora) merupakan salah satu komoditas unggulan yang berada di Provinsi Lampung. Selain sebagai olahan minuman, biji kopi robusta juga dapat dimanfaatkan sebagai bahan tambahan alami dalam sediaan produk kosmetik. Masker gel peel-off merupakan salah satu jenis produk kosmetik yang dapat berfungsi sebagai anti-aging pada wajah. Pada penelitian ini, formulasi masker gel peel-off berhasil dipreparasi dengan memanfaatkan ekstrak biji kopi robusta. Metode formulasi masker gel peel-off dilakukan melalui proses in-situ. Hasil uji fitokimia menunjukkan senyawa metabolit sekunder yang terkandung dalam ekstrak biji kopi robusta yaitu alkaloid, flavonoid, saponin, dan tannin. Analisis spektrofotometer UV-vis menunjukkan kadar senyawa flavonoid sebesar 5,86 mg/g. Hasil uji pH masker gel peel-off menggunakan ekstrak kopi robusta sebesar 5,3. Masker gel peel-off tidak menyebabkan reaksi iritasi pada kulit. Sifat fisik dari masker gel peel-off terlihat berwarna coklat dengan bentuk semisolid. Hasil uji aktivitas antioksidan masker gel peel-off menunjukkan nilai IC50 sebesar 7,104 ppm. Dari data yang ada dapat disimpulkan bahwa senyawa flavonoid dalam ekstrak biji kopi robusta sangat berpengaruh terhadap aktivitas antioksidan dalam formulasi sediaan masker gel peel-off.
Glycosylated stigmasterol from the rind of Napoleonaea imperialis
Authors: Ndukwe Gloria Ihuoma , Jack Ibiba Reuben , Ekong Rachael Elijah 
Published: March 2022

Abstract

Napoleonaea imperialis rinds were separated from the seeds and extracted via maceration using methanol. The crude methanol extract was partitioned with n-hexane and dichloromethane to yield n-hexane fraction (11.01 g), dichloromethane fraction (35.16 g) and methanol fraction (101.75 g). Dichloromethane fraction was chromatographed and purified to give a compound whose structure was elucidated using one-dimension and two-dimension nuclear magnetic resonance (NMR) experiments. The isolated compound was characterized as glycosylated stigmasterol.
Calcium Oxalate Crystal Yield in Various Gravity Environments
Authors: Egusquiza Riann J. , Runyon Robert Benjamin , Ringel Jordan , Seber Craig W.C. , Leyva Gonzalo , Correa Jose , Roland Coulibaly Datoliban , Umar Mujahid , Xiao Ming , Bushoven John T. , Goto Joy J. 
Published: March 2022

Abstract
An experimental chamber and hand-manipulated syringe apparatus were designed, tested, and utilized to assess calcium oxalate crystal yield in Terrestrial-g (1 g), micro-g (0.01 g), Lunar-g (0.16 g), and Martian-g (0.38 g). Aqueous solutions of calcium chloride (100 mM) and oxalic acid (200 mM) were mixed to precipitate calcium oxalate crystals. Gravitational differences were hypothesized to result in differences in the yield of crystal formation. These data are essential for efforts to better understand the correlation between calcium oxalate crystal formation and the production of kidney stones often associated with long-term space missions. The analyses of crystal formation produced in the micro-g (≅0.01 g) conditions of this study suggest that calcium oxalate monohydrate formation yield is slightly greater than those produced in Terrestrial-g conditions.
A Balloon-Based Payload for Exposing Microorganisms in the Stratosphere (E-MIST)
Authors: Smith David J. , Thakrar Prital J. , Bharrat Anthony E. , Dokos Adam G. , Kinney Teresa L. , James Leandro M. , Lane Michael A. , Khodadad Christina L. , Maguire Finlay , Maloney Phillip R. , Dawkins Nicole L. 
Published: March 2022

Abstract
The survival and transit of microorganisms in Earth's upper atmosphere is relevant to terrestrial ecology and astrobiology, but the topic is understudied due to a scarcity of suitable flight systems. We designed, built, and flew a self-contained payload, Exposing Microorganisms in the Stratosphere (E-MIST), on a large scientific balloon launched from New Mexico on 24 August 2014. The payload carried Bacillus pumilus SAFR-032, a highly-resilient spore-forming bacterial strain originally isolated from a NASA spacecraft assembly facility. Our test flight evaluated E-MIST functionality in the stratosphere, including microbiological procedures and overall instrument performance. Herein, we summarize features of the E-MIST payload, protocols, and preliminary results that indicate it is possible to conduct a tightly-controlled microbiological experiment in the stratosphere while collecting pertinent environmental data. Additional studies of this nature may permit survival models for microbes traveling through Earth's harsh upper atmosphere. Moreover, measuring the endurance of spacecraft-associated microbes at extreme altitudes may help predict their response on the surface of Mars.
Effect of Friction Dampers on Seismic Response of Steel Frames
Authors: Oance Ionuț-Sergiu , Gelmambet Sunai 
Published: March 2022

Abstract
This paper deals with effect of friction dampers on seismic response of 2D steel frames in comparison with structures stiffened by large sections and centrally braced. For the present study three structures with six storeys are subjected to a time history analysis. To study the effect of dampers in structures in comparison with structures stiffened by large sections and centrally braced, are analysed the relative level displacements, maximum displacement on the top, variation of lateral acceleration at the last level and variation of the maximum seismic base shear force depending on the lateral rigidity. The results indicate that placement of friction dampers improve the response of structures in all analyzed terms.
A Study on the Urban Redevelopment of Ovidiu’s Shoreline
Authors: Mociu Nicolae-Costin 
Published: March 2022

Abstract
This study adds to what most studies lack in understanding the process and context of urban regeneration. Only by understanding the local, national, and global contexts and processes of urban regeneration can inferences, lessons, and best practices be made. The objective of this study is to review the literature on urban regeneration and evaluate contemporary alterations and their implications for future city renewal. The rehabilitation of Ovidiu’s waterfront is a unique issue, considering the city’s location, its openness to Lake Siutghiol, which is separated from the Black Sea by only a 400m wide cordon, and the presence of the Roman camp and the aqueduct that previously supplied the Roman castle of Tomis. Lake Siutghiol has considerable growth potential due to the direct connection between Ovidiu and Mamaia, a popular tourist destination recently attracting many investors.
Brăila’s Historical Monuments
Authors: Iordache Mădălina , Grămescu Ana Maria 
Published: March 2022

Abstract
The historic center of Brăila begins with “Trajan Square”, a special cultural area with monuments that distinguish it among national cultural values: the Church of the “Holy Archangels Michael and Gabriel” and the “Maria Filotti” Theater. These heritage buildings in cities preserve the memory of the original structure.
Building a Privacy-Preserving Smart Camera System
Authors: Beugin Yohan , Burke Quinn , Hoak Blaine , Sheatsley Ryan , Pauley Eric , Tan Gang , Hussain Syed Rafiul , McDaniel Patrick 
Published: March 2022

Abstract
Millions of consumers depend on smart camera systems to remotely monitor their homes and businesses. However, the architecture and design of popular commercial systems require users to relinquish control of their data to untrusted third parties, such as service providers (e.g., the cloud). Third parties therefore can (and in some instances have) access the video footage without the users’ knowledge or consent—violating the core tenet of user privacy. In this paper, we present CaCTUs, a privacy-preserving smart Camera system Controlled Totally by Users. CaCTUs
returns control to the user; the root of trust begins with the user and is maintained through a series of cryptographic protocols, designed to support popular features, such as sharing, deleting, and viewing videos live. We show that the system can support live streaming with a latency of 2 s at a frame rate of 10 fps and a resolution of 480 p. In so doing, we demonstrate that it is feasible to implement a performant smart-camera system that leverages the convenience of a cloud-based model while retaining the ability to control access to (private) data.
Privacy-Preserving Positioning in Wi-Fi Fine Timing Measurement
Authors: Schepers Domien , Ranganathan Aanjhan 
Published: March 2022

AbstractWith the standardization of Wi-Fi Fine Timing Measurement (Wi-Fi FTM; IEEE 802.11mc), the IEEE introduced indoor positioning for Wi-Fi networks. To date, Wi-Fi FTM is the most widely supported Wi-Fi distance measurement and positioning system. In this paper, we perform the first privacy analysis of Wi-Fi FTM and evaluate devices from a wide variety of vendors. We find the protocol inherently leaks location-sensitive information. Most notably, we present techniques that allow any client to be localized and tracked by a solely passive adversary. We identify flaws inWi-Fi FTM MAC address randomization and present techniques to fingerprint stations with firmware-specific granularity further leaking client identity. We address these shortcomings and present a privacy-preserving passive positioning system that leverages existing Wi-Fi FTM infrastructure and requires no hardware changes. Due to the absence of any client-side transmission, our design hides the very existence of a client and as a side-effect improves overall scalability without compromising on accuracy. Finally, we present privacy-enhancing recommendations for the current and next-generation protocols such as Wi-Fi Next Generation Positioning (Wi-Fi NGP; IEEE 802.11az).
RegulaTor: A Straightforward Website Fingerprinting Defense
Authors: Holland James K , Hopper Nicholas 
Published: March 2022

Abstract
Website Fingerprinting (WF) attacks are used by local passive attackers to determine the destination of encrypted internet traffic by comparing the sequences of packets sent to and received by the user to a previously recorded data set. As a result, WF attacks are of particular concern to privacy-enhancing technologies such as Tor. In response, a variety of WF defenses have been developed, though they tend to incur high bandwidth and latency overhead or require additional infrastructure, thus making them difficult to implement in practice. Some lighter-weight defenses have been presented as well; still, they attain only moderate effectiveness against recently published WF attacks. In this paper, we aim to present a realistic and novel defense, RegulaTor, which takes advantage of common patterns in web browsing traffic to reduce both defense overhead and the accuracy of current WF attacks. In the closed-world setting, RegulaTor reduces the accuracy of the state-of-the-art attack, Tik-Tok, against comparable defenses from 66% to 25.4%. To achieve this performance, it requires 6.6% latency overhead and a bandwidth overhead 39.3% less than the leading moderate-overhead defense. In the open-world setting, RegulaTor limits a precision-tuned Tik-Tok attack to an F
1-score of. 135, compared to .625 for the best comparable defense.
PUBA: Privacy-Preserving User-Data Bookkeeping and Analytics
Authors: Fetzer Valerie , Keller Marcel , Maier Sven , Raiber Markus , Rupp Andy , Schwerdt Rebecca 
Published: March 2022

Abstract
In this paper we propose Privacy-preserving User-data Bookkeeping & Analytics (PUBA), a building block destined to enable the implementation of business models (e.g., targeted advertising) and regulations (e.g., fraud detection) requiring user-data analysis in a privacy-preserving way. In PUBA, users keep an unlinkable but authenticated cryptographic logbook containing their historic data on their device. This logbook can only be updated by the operator while its content is not revealed. Users can take part in a privacy-preserving analytics computation, where it is ensured that their logbook is up-to-date and authentic while the potentially secret analytics function is verified to be privacy-friendly. Taking constrained devices into account, users may also outsource analytic computations (to a potentially malicious proxy not colluding with the operator).We model our novel building block in the Universal Composability framework and provide a practical protocol instantiation. To demonstrate the flexibility of PUBA, we sketch instantiations of privacy-preserving fraud detection and targeted advertising, although it could be used in many more scenarios, e.g. data analytics for multi-modal transportation systems. We implemented our bookkeeping protocols and an exemplary outsourced analytics computation based on logistic regression using the MP-SPDZ MPC framework. Performance evaluations using a smartphone as user device and more powerful hardware for operator and proxy suggest that PUBA for smaller logbooks can indeed be practical.
Baseline Laboratory Parameters for Assessment of Iron Deficiency in Patients with Inflammatory Bowel Diseases
Authors: Sargautiene Vanda , Leice Alevtina , Gavars Didzis 
Published: March 2022

Abstract
Iron deficiency (ID) and its late stage, iron deficiency anaemia, are often overlooked conditions in patients with inflammatory bowel disease (IBD). The study is primarily aimed at the need for first-phase screening for ID in patients with IBD using laboratory baseline parameters such as ferritin and C-reactive protein (CRP). Laboratory data of 4558 unique patients with IBD was analysed. For first-phase screening of ID, the thresholds of serum ferritin < 30 µg/l in the absence of inflammation (CRP < 5 mg/l) and serum ferritin < 100 µg/l in the presence of inflammation (CRP > 5 mg/l) were used. The study revealed that ferritin analysis was conducted for only one third of the enrolled unique patients with IBD over a five-year period. First-phase ID screening showed that decrease in ferritin values was found in 56% of unique IBD patients over this period, as determined using CRP and ferritin during the same blood collection (same referral number). Haemoglobin (Hb) tests were performed in 93% of unique IBD patients in the five-year period. A decrease in Hb was found in 21% of unique patients with Crohn’s disease, 20% of patients with ulcerative colitis, and in 5% of patients with unspecified non-infective gastroenteritis and colitis.
Body Muscle Mass Metabolic Data Analysis in Association with Crohn’s Disease Activity
Authors: Zaļizko Polina , Urbāne Monta , Roshofa Terēze Hermīne , Mokricka Viktorija , Meija Laila , Bodnieks Edgars , Puķītis Aldis 
Published: March 2022

Abstract
Malnutrition is a common complication of Crohn’s disease (CD) patients and it is correlated with alterations of the body composition and disease activity. Our prospective pilot study included hospitalised CD patients, age ≥ 18 years. Patients were assessed using the Nutritional Risk Score (NRS2002), the Malnutrition Universal Screening Tool (MUST), and body bioelectrical impedance analysis. Twenty-three hospitalised patients (median age 36.5, interquartile range (IQR): 28.5–51.5 years) were enrolled; the median CD activity index was 128 (IQR = 6.0–207.0). The study group comprised 48% (n = 11) patients with low CD activity and 52% (n = 12) with high disease activity. According to NRS2002 and MUST, 70% (n = 16) CD patients had malnutrition risk and were in need of nutritional support. The median BMI was lower for the CD group (21.10 [IQR = 19.2–23.3]) than for the control group (23.4 [IQR = 21.5–25.8]) (p = 0.014). In terms of deviation from standard weight, 39% (n = 9) of CD patients showed reduced % body fat. Reduced muscle mass was observed in 48% (n = 11) of CD patients. CD patients with high disease activity had a noticeably increased risk of malnutrition. Identification of the reduction in soft lean muscle mass in CD patients can be used as an anticipatory indicator of disease activity.
Socioeconomic Factors and Changes in Food Choice and Availability During COVID-19 Restrictions in Latvia
Authors: Pitkēviča Ieva , Pumpure Elizabete , Graviņa Marta Laura , Mihailova Darja , Briedīte Ieva , Rezeberga Dace , Kantāne Ināra , Ķīvīte-Urtāne Anda , Lazdāne Gunta 
Published: March 2022

Abstract
The COVID-19 pandemic changed the life of many. The study aimed to identify fragile groups of the population regarding nutrition during the COVID-19 restriction period. An online survey was conducted from 26 July to 3 September 2020. A total of 1173 answers were received from persons aged 18–68 years living in Latvia. The results showed that food availability mainly was not limited, although for 15.3% responders restrictions caused increased worries about not having enough food, and 12.2% noted a decrease in the ability to eat preferred food. Responders aged 40–54 noted that they ate less, and that their food stocks were scarce in comparison with other age groups. Almost 50% of responders increased food consumption. One-fifth of responders increased consumption of foods of low nutritional value, especially among 25–39 year old persons and in households where the economic situation became worse. Fragile groups regarding nutrition in times of COVID-19 restrictions included households whose economic situation became worse during the COVID-19 restrictions, younger people who increased food consumption together with consumption of food of low nutritional value, and persons aged 40–54 years. The data from the study serve as an indicator that more detailed research is needed to determine whether crises such as the COVID-19 pandemic are changing dietary habits and food availability in the population.