bluuebunny/crossref_metadata_2025_split huggingface dataset:
The surgical correction of refractory venous trophic ulcers
Authors: Katorkin S. E. , Kushnarchuk M. J. , Melnikov M. A. , Zhukov A. A. , Kravtsov P. F. , Repin A. A. 
Published: April 2021

Objectives. To study the effectiveness of layered dermatolipectomy and endoscopic fasciotomy in the surgical treatment of refractory venous trophic ulcers.Materials and methods. Patients (n = 105) of the C6 clinical class underwent crossectomy and short stripping. In group I (n = 35), free autodermoplasty of trophic ulcers with a perforated flap was performed. In group II (n = 36), shave therapy and autodermoplasty were performed. In group IIІ (n = 34), fasciotomy, shave therapy and autodermoplasty were performed. Long-term results of treatment were studied in the period from 1 to 12 months.Results. Complete healing of venous trophic ulcers was observed in group I at 49,4 ± 7,2, in II – at 31,4 ± 4,7, in III – at 32,1 ± 3,6 days сутки (t1-2 = 2,09; p1-2 = 0,049; t1-3 = 2,24; p1-3 = 0,024; t2-3 = 0,03; p2-3 = 0,763). Full engraftment of an autograft graft was recorded in 7 (19,4 %) patients of group I, in 27 (77,1 %) cases in group II and in 27 (79,4 %) patients of comparison group III (χ21-2 = 23,674; p1-2 = 0,001; χ21-3 = 25,173; p1-3 = χ22-3 = 0,052; p2-3 = 0,826).Conclusion. Layered dermatolipectomy with autodermoplasty and endoscopic decompression fasciotomy is an effective method for the treatment of persistent refractory venous trophic ulcers.
GEOMORFOLOGIA DO SEMIÁRIDO: PROPOSTA METODOLÓGICA DE REPRESENTAÇÃO CARTOGRÁFICA E INTERPRETAÇÃO DO RELEVO EM ESCALA DE DETALHE
Authors: Lima Kleber Carvalho , Lupinacci Cenira Maria 
Published: April 2021

O desenvolvimento de uma cartografia do relevo em escala de detalhe no semiárido brasileiro apresenta diversos aspectos a serem considerados, de maneira a subsidiar consistentemente, pesquisas geomorfológicas em contextos locais. Nesse artigo, objetivou-se apresentar uma proposta metodológica de mapeamento geomorfológico de detalhe para setores cristalinos da Depressão Sertaneja semiárida, desenvolvida por meio de estudo de caso. Os procedimentos metodológicos envolveram a preparação da base de dados, análise de manuais de mapeamento geomorfológico pré-existentes, trabalhos de campo, elaboração de chave de interpretação e a representação gráfica das formas de relevo. Desse modo, foram representados atributos morfográficos e morfométricos do relevo, bem como a hidrografia, topografia, feições antrópicas, litologia, cronologia e elementos estruturais. O mapeamento geomorfológico elaborado contribuiu para o entendimento da organização espacial das formas de relevo nas áreas de estudo, além de contribuir com a interpretação dos fatos geomorfológicos. Assim, acredita-se que os procedimentos técnicos desenvolvidos podem ser aplicados em áreas com características semelhantes, ou ainda, serem adaptados a diferentes contextos no próprio semiárido.
Investigation of Bi2S3 nanorods photocatalytic activity under visible light for the degradation of dye from aquatic system
Authors: Keerthana Subramaniyan , Yuvakkumar Rathinam , Kumar Ponnusamy Senthil , Ravi Ganesan , Velauthapillai Dhayalan , Vo Dai-Viet Nguyen 
Published: April 2021

Abstract
Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 was synthesized by employing solvothermal route. X-ray diffraction, UV-vis absorption, photoluminescence, Raman, scanning electron microscopic studies confirmed the structural, optical, morphological behaviors. The XRD pattern of Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 correlated well with JCPDS # 65-2435. The crystallite size was found to be 57, 49 and 40 nm. The photoluminescence spectra showed the semiconducting property of the prepared Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3. The absorption spectra of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 nanorods were well matched with the spectra of the previous report. The band gap of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 was calculated to be 1.56, 1.45 and 1.3 eV in reducing order. The morphology of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 samples showed the development of nanorods. 10 ml EG-Bi2S3 sample showed better development of nanorods with the addition of ethylene glycol. The agglomeration was considerably reduced with the mixing of solvent. 10 ml EG- Bi2S3 sample investigated showed 86% of efficiency towards dye degradation. The narrow band gap, defined morphology of 10 ml EG- Bi2S3 made a positive result towards efficient photocatalytic activity.
An Effect of 24-hour Temperature Change on Outpatient and Emergency and Inpatient Visits for Cardiovascular Diseases in Northwest China
Authors: Shi Qin , Wei Xingfu , Liu Yanli , Meng Xiangyan , Zhu Wenzhi , Wang Minzhen , Wang Yufeng , Kang Feng , Bai Yana , Nie Yonghong , zheng shan 
Published: April 2021

Abstract
Background: Some studies suggested 24-hour temperature change (TC24) was one of the potential risk factors for human health. However, evidence of the short-term effect of TC24 on outpatient and emergency department (O&ED) visits and hospitalizations for cause-specific cardiovascular diseases (CVDs) is still limited. Objective: To explore the short-term effects of TC24 on O&ED visits and hospitalizations for CVDs in northwest China which is an area with large temperature variation.Method: The O&ED visits records for CVDs of 3 general hospitals and the inpatient records for CVDs of 4 general hospitals were collected from January 1, 2013 to December 31, 2016, in Jinchang City, northwest China. Meteorological and air pollution data were also obtained during the same study period from local meteorological monitoring stations and environmental monitoring station, respectively. A generalized additive model (GAM) with Poisson regression was employed to analyze the effects of TC24 on O&ED visits and hospitalizations for CVDs. Results: V-shaped relationship were found between TC24 and O&ED visits and hospitalizations for CVDs including total CVD, hypertension, coronary heart disease (CHD) and stroke. Stratified analysis showed that men and patients over 65 years old were more susceptible to temperature changes. Whether heating may modify the effects of TC24 on O&ED visits and hospitalizations for CVDs.Conclusion: TC24 can affect the O&ED visits and hospitalizations for CVDs in this study. This study provides useful data for policy makers to better prepare local responses to the impact of changes in temperatures on population health.
Capturing the colloidal microplastics with plant-based nanocellulose networks
Authors: Leppänen Ilona , Lappalainen Timo , Lohtander Tiia , Jonkergouw Christopher , Arola Suvi , Tammelin Tekla 
Published: April 2021

Abstract
Microplastics accumulate to various aquatic organisms causing serious health issues, and they have raised concerns about human health by entering our food chain. The recovery techniques for the most challenging colloidal fraction even for the analytical purposes are limited. Here we show how hygroscopic nanocellulose network acts as an ideal capturing material even for the tiniest nanoplastic particles. We reveal that the entrapment of particles from the aqueous environment is a result of the network’s hygroscopic nature - a feature which is further intensified with the high surface area. We determine the nanoplastic binding mechanisms using surface sensitive methods, and interpret the results with the random sequential adsorption (RSA) model. The microplastic uptake does not rely on any specific interfacial interaction but rather on the water transport behavior of nanocellulose. These findings hold potential for the explicit quantification of the microplastics from different environments, and eventually, provide solutions to collect those directly on-site where they are produced.
Left Ventricular Strain and Left Atrial Strain Are Impaired During Hemodialysis in Children
Authors: Doan Tam T , Sriva Poyyapakkam , Liu Asela , Wilkes J. Kevin , Idrovo Alexandra , Akcan-Arikan Ayse , Swartz Sarah , Geer Jessica , Altman Carolyn A. , Ayres Nancy A. , Loar Robert W. , Pignatelli Ricardo 
Published: April 2021

Abstract
Purpose
We aimed to investigate intradialytic changes in ventricular and atrial function using speckle tracking echocardiography (STE) in pediatric hemodialysis (HD).
Methods
Children with HD vintage > 3 months were enrolled, and echocardiography was performed prior to, during, and after HD. STE was analyzed using GE EchoPAC. Left ventricular (LV) global longitudinal strain (GLS), strain rate (Sr), and mechanical dispersion index (MDI) were calculated as the average from 3 apical views; diastolic strain (Ds) and Sr from 4-chamber tracing; left atrial strain (LAS) and Sr from the 4- and 2-chamber views.
Results
A total of 15 patients were enrolled at a median age of 12 years (IQR 8, 16) and median HD vintage of 13 months (IQR 9, 25). GLS worsened during HD (-15.8 ± 2.2% vs -19.9 ± 1.9%, p < 0.001). Post-HD GLS was associated with BP decrease (coefficient = 0.62, p = 0.01). LV MDI and systolic Sr did not change. LV Ds progressively worsened (-8.4% (-9.2, -8.0) vs − 11.9% (-13.4, -10.3), p < 0.001). LAS changes at mid-HD returned to baseline post-HD. Ds, DSr, LAS, LASr were not associated with BV removal or BP decrease (p > 0.1).
Conclusions
Intradialytic LV strain and LAS changes consistent with subclinical systolic and diastolic dysfunction were observed during HD in children. Changes in Ds, DSr, LAS, and LASr were not associated with BP change or BV removal and may be related to the disease progression. Longitudinal study using these novel indices may unfold the effect of these subclinical changes on long-term cardiovascular health in children requiring chronic HD.
Congestion Control investigation into 5G V2V
Authors: CHIHI Houda , Boualegue Ridha 
Published: April 2021

Abstract
Congestion control is a hot research topic according to the continuous increase of traffic density together with great mobility of cars. In this context, in this survey we present an overview about the different vehicle to vehicle (V2V) communication enablers by describing the difference between them performing better driving assistance together with efficient congestion control ensuring driving safety. New radio (NR) 5G is the heuristic enabler which provides scalability and reliability towards vehicular communication. Indeed, NR 5G is the best solution supporing the great increase of network density. 5G technology is expected to allow much advanced services and application with a huge capacity of data exchange. Congestion occurance impacts the quality of service of vehicular network, for this accurate quantification is required. In our analysis we consider channel busy rate CBR as indicator of network density. Channel load control is mondatory to overcome traffic jam which could be highlighted by different metrics. The connectivity between cars is modeled with a game theory framework considering a non cooperative vehicular mobility. Each vehicle adjusts its transmitted power in dynamic way taking into account the traffic density measured by channel busy rate (CBR). Consequently, we follow a theoretical modeling to determine the efficient allocated power ensuring awareness messages exchange without saturating the communication channel under the respect of a fixed threshold. Therefore, channel saturation control is investigated following a theoretical analysis exploiting game theory under the assumption of a non cooperative strategy. Each vehicle acts as a player presenting a specific driving behavior different to the other cars participating into the same scenario. The optimization framework is about determining the optimal allocated power for congestion minimization.
Occurrence, Distribution, and Ecological Risk Assessment of Emerging and Legacy Contaminants in the Kadicha River in Lebanon
Authors: Merhabi Fatme , Gomez Elena , Amine Helmieh , Rosain David , Halwani Jalal , Fenet Hélène 
Published: April 2021

Abstract
The Kadicha river basin in Northern Lebanon is an illustrative example of multiple pressures encountered in the Mediterranean region: it is a small coastal river affected by rapid urbanization, population growth (drastically impacted by the influx of Syrian refugees), and a chronic default of wastewater treatment. In this context, multiple classes of contaminants may attain the river accumulating in sediment. However, very little information is available in the literature on the contamination status in such stressed Mediterranean contexts. This study proposed a first contamination evaluation of a small Mediterranean river submitted to multiple pressures. Two sediment sampling campaigns along sites impacted by increasing urban gradient within the Kadicha river basin were performed to determine the occurrence and the environmental risks of both emerging and legacy contaminants. The results revealed the detection of the 41 studied compounds. The highest concentrations were attained by PAHs and polycyclic musks (up to 311.79, 94.22, and 81.13 ng/g of dry weight for PAH, cashmeran, and galaxolide, respectively). The discontinuous urbanized upstream area and the estuary were the most contaminated areas of the river. An environmental risk assessment showed a hazard quotient (HQ) higher than 1 for both legacy and emerging compounds (EHMC and 4-MBC), indicating a potential risk to benthic species. Monitoring campaigns and implementation of wastewater treatment plants should be encouraged as the anthropogenic pressure on small Mediterranean rivers will increase over the years.
On Channel Estimation for Rician fading with the phase-shift in Cell-Free Massive MIMO system
Authors: Amadid Jamal , boulouird Mohamed , Belhabib Abdelfettah , Zeroual Abdelouhab 
Published: April 2021

Abstract
Channel estimation (CE) is a crucial phase in wireless communication systems, especially in cell-free (CF) massive multiple input multiple output (M-MIMO) since it is a dynamic wireless network. Therefore, this work is introduced to study CE for CF M-MIMO system in the uplink phase, wherein the performance of different estimators are evaluated, discussed, and compared in various situations. We assume the scenario in which each access point has prior knowledge of the channel statistics. The phase-aware-minimum mean square error (PA-MMSE) estimator, the non-phaseaware-MMSE (NPA-MMSE) estimator, and the least-squares estimator are the three
estimators which are exploited in this work. Besides, we consider the Rician fading channel in which the line-of-sight path is realized with a phase-shift that models the users’ mobility where the considered phase-shift follows a uniform distribution. On the other hand, the mean-squared error metric is employed in order to evaluate the performance of each estimator, where an analytical and simulated result is provided for the PA-MMSE estimator and the NPA-MMSE estimator in order to assert our numerical results.
MCDM Approach to Improve the Quality of Broadcasting Technique in Wireless Ad-hoc Networks
Authors: AHMAD NAEEM , Sethi Shuchi , Hasan Md Gulzarul , Barbhuiya Rejaul Karim 
Published: April 2021

Abstract
Contemporary research work in the field of Wireless Ad-hoc Networks (WANETs) are focused on most important issue of performance, minimize the congestion in the network. A number of research proposals have come up with innovative query transmission approaches in order to scale down congestion, route latency and energy consumption to the feasible extent. It has been shown experimentally that these approaches have mainly focused on checking propagation of route query using query broadcast repealing technique which unfortunately paves way to additional routing overhead. This leads to increased energy-consumption which offsets the benefits. This paper introduces a self-aware query-broadcast approach which is dynamic in nature and obtains desirable path in discovery phase without counterbalancing the advantages reaped from confining the request zones. The proposed approach relies on Analytic Hierarchy Process (AHP), which utilizes the routing metrics in estimating the weighing factors for combined weight metrics. For evaluation of the proposed technique, critical and analytical assessment is done in terms of query-diffusion, packet-delivery ratio and route-latency. The results reveal the proposed approach is ideal, optimal and highly practical for application in WANETs.
Application Based Performance Analysis of a Priority Flow Divider Valve Using Power Hydraulic Systems
Authors: Kumar Dharmendra , Mahato Anil C 
Published: April 2021

Abstract
Priority flow divider valve (PFDV) splits the flow in two different paths: Primary flow path and Secondary flow path. It can be used in twice applications: a system needs to perform dual functions against dual loads simultaneously and to obtain a stable flow by supplying a compensated flow from secondary flow line to the primary flow line using an energy storage device and a control valve. Two different hydraulic systems are identified to analyze the steady and dynamic performance of the PFDV. The first hydraulic system with PFDV is designed for automobile steering system with a load sensing control strategy in the presence of multiple actuators whereas second system is designed for wind turbine hydraulic power transmission to obtain stable power from it in the absence of generator. Both power hydraulic systems are modeled using bond graph technique and simulated in SYMBOLS SHAKTI software to analyze the PFDV performance.
Evaluation of Radiation Maculopathy after Treatment of Choroidal Melanoma with Ruthenium-106 using Optical Coherence Tomography Angiography
Authors: Torkashvand Ali , Riazi-Esfahani Hamid , Ghassemi Fariba , Pour Elias Khalil , Masoomian Babak , Zarei Mohammad , Fadakar Kaveh , Arjmand Mojtaba , Tayebi Freshteh , Ekradi Leila , Moghaddam Hamid Abrishami , Mahmoudi Tahereh , Daneshmand Reihaneh , Faghihi Hooshang 
Published: April 2021

Abstract
BACKGROUND: To assess the impact of brachytherapy on macular microvasculature utilizing optical coherence tomography angiography (OCTA) in treated choroidal melanoma.METHODS: In this retrospective observational case series, we reviewed the recorded data of the patients with choroidal melanoma treated with rheuthenium-106 (106Ru) plaque radiotherapy with follow-up period of more than 6 months. Automatically measured OCTA retinal parameters were analyzed after image processing. The non-irradiated fellow eye is considered as the control.RESULTS: Thirty-one eyes of 31 patients with the mean age of 51.1 years were recruited. Six eyes had no radiation maculopathy (RM). From 25 eyes with RM, nine eyes (36%) revealed a burnout macular microvasculature with imperceptible vascular details. Foveal and optic disc radiation dose had the highest value to predict the burnout pattern (ROC, AUC: 0.763, 0.727). Superficial and deep foveal avascular zone (FAZ) were larger in irradiated eyes in comparison to healthy eyes (1629 µm2 vs. 428 µm2, P =0.005; 1837 µm2 vs 268 µm2, P =0.021; respectively). Foveal and parafoveal vascular area density (VAD) and vascular skeleton density (VSD) in both superficial and deep capillary plexus (SCP and DCP) were decreased in all irradiated eyes in comparison with control eyes (P< 0.001). Compared with fellow healthy eyes, irradiated eyes without RM had significantly lower VAD and VSD at foveal and parafoveal DCP (all P<0.02). However, these differences at SCP were not statistically significant. CONCLUSION: The OCTA is a valuable tool for evaluating RM. Initial subclinical microvascular insult after 106Ru brachytherapy is more likely to occur in DCP. The deep FAZ area was identified as a more critical biomarker of BCVA than superficial FAZ in these patients.
A novel Double Tier Cryptographic System (nDTCS) to Reinforce Patients’ Privacy in Contemporary COVID-19 Telemedicine
Authors: BHOWMIK ANIRBAN , DEY JOYDEEP , KARFORMA SUNIL 
Published: April 2021

Abstract
In this modern COVID-19 telemedicine industry, privacy and security of patients’ information is the most open challenge to keep it intact. Considering the current legal regulations, every hospital must impose a prominent security technique to maintain a secure electronic health records system. The realization of telemedicine is another notable advancement in the field of medical sciences. The healthcare services have increased its throughput with the help of Internet based computing. Recently, security flaws on patient’s information have become a more significant challenge in electronic healthcare system. Electronics health record i.e. collection of health related patients’ information are extremely sensitive in nature. So, it is very relevant to impose an advanced security techniques in such systems. Here, we have focused on security issues likes of technical safeguards. A novel Double Tier Cryptographic System (nDTCS) have been proposed here. We had proposed a modified logistic map and linear congruence based security model for the secured telemedicine transactions with an authentication technique. For encryption and decryption purpose, two keys have been used which were intermediate key, and session key. The modified logistic map and secret sharing were the backbone of the proposed technique. This new approach of key generation provides newness as well as extra robustness in our proposed technique. The chaotic sequences in the ranges of I and n on the initial values , and t respectively were noted under this technique test. 264, 2256, 21024, 24096, 216384hand 265536 were the possibilities of combined key space volumes. The different types of mathematical experiments like randomness test, brute force, histogram analysis and their obtained results have guided that it is very secured and efficient for patients’ data transmission in health sectors.
TEMPO-Oxidized Cellulose Hydrogel Fiber Cell Load, a Cell Support System Proof of Concept&nbsp;
Authors: Rios Mariana Alves , Barbugli Paula Aboud , Iemma Mônica Rosas Costa , Grande Rafael , Carvalho Antônio José Felix , Trovatti Eliane 
Published: April 2021

Abstract
The development of new cell carriers systems are crucial for application in regenerative medicine, once they deliver the cells to the injured tissue to trigger the repair and stimulate the regeneration of the new tissue, and so far various carrier systems have been investigated in this regard. Here we report on the synthesis and characterization of a new cell carrier system in fiber shape where the cells osteo-1 are incorporated into the oxidized cellulose nanofibers suspension and then complexed with calcium ions in a pulling process giving rise to the fiber loaded with cells. The microscopic images showed the success of the proposed method to incorporate the cells into the fibers. The results of the in-vitro viability tests indicated the capability of the fibers to keep the cells alive and to mineralize them, indicating that their osteogenic capability was not affected. In addition, the fiber disintegration studies showed the system is capable of releasing the cells, suggesting the potential of the fibers as a new assembled hydrogel carrier cell therapy.