bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Survey on Proxy Re-Signature Schemes for Translating One Type of Signature to Another
Authors: Chaudhari Shilpa , Aparna R. , Rane Archana 
Published: December 2021

AbstractProxy Re-Signature (PRS) complements well-established digital signature service. Blaze-Bleumer-Strauss discussed PRS in 1998 for translating a signature on a message from Alice into a signature from Bob on the same message at semi-trusted proxy which does not learn any signing-key and cannot produce new valid signature on new message for Alice or Bob. PRS has been largely ignored since then but it has spurred considerable research interest recently for sharing web-certificates, forming weak-group signatures, and authenticating network path. This article provides a survey summarizing and organizing PRS-related research by developing eight-dimensional taxonomy reflecting the directional feature, re-transformation capability, re-signature key location, delegatee involvement, proxy re-signing rights, duration-based revocation rights, security model environment, and cryptographic approach. Even though multi-dimensional categorization is proposed here, we categorize the substantial published research work based on the eighth dimension. We give a clear perspective on this research from last two-decades since the first PRS-protocol was proposed.
A Review on Privacy Requirements and Application Layer Security in Internet of Things (IoT)
Authors: Sudha K. Swapna , Jeyanthi N. 
Published: December 2021

Abstract
Internet of Things (IoT) is the predominant emerging technology that targets on facilitating interconnection of internet-enabled resources. IoT applications concentrate on automating different tasks that facilitate physical objects to act autonomously without any human interventions. The emerging and current IoT applications are determined to be highly significant for improving the degree of efficiency, comfort and automation for its users. Any kind of security breach on the system will directly influences the life of the humans In this paper, a comprehensive review on Privacy requirements and application layer Security in Internet of Things (IoT) is presented for exploring the possible security issues in IoT that could be launched over the individual layers of IoT architecture. This review explores different challenges of classical security solutions that are related to authentication, key management and cryptographic solutions.It also presents the details of existing access control and device authentication schemes with their pros and cons.
Dactylogyrus Infestation in Farmed Common Carp Cyprinus carpio from Aquaculture Facilities in Macedonia
Authors: Blazhekovikj-Dimovska Dijana , Stojanovski Stojmir 
Published: December 2021

Abstract
A total of 958 specimens of farmed common carp Cyprinus carpio from eight of the most significant and largest cyprinid aquaculture facilities in Macedonia (pond and cage culture systems) were examined for parasitological investigation for three years. The following parasite species of the genus Dactylogyrus were identified: Dactylogyrus extensus, Dactylogyrus minutus and Dactylogyrus anchoratus. The highest prevalence was determined for D. extensus (38.8%), followed by D. minutus (7.9%) and D. anchoratus (2.8%). The highest mean intensity was determined for D. extensus (6.2), followed by D. minutus (4.7) and D. anchoratus (3.8). By seasons, the highest prevalence (16.5%) was recorded for D. extensus in winter, while the lowest (0.6%) for D. minutus in autumn. The highest mean intensity (8.0) was also determined for D. extensus in winter, and the lowest (1.9) for D. minutus in spring.
Fish Biodiversity, Threat Status and Conservation Significance of the Jamuna River, Bangladesh
Authors: Paul Sulav Indra , Majumdar Bhaskar Chandra , Hasan Mahmudul , Sarker Apurbo Kumer , Baidya Arpan , Hakim Md. Azizul 
Published: December 2021

Abstract
The present survey aimed to explore the fish fauna diversity, abundance and conservation status in the Jamuna River, a tributary of the River Brahmaputra, Bangladesh. During the study period from November 2018 to October 2019, a total of 55 species of fish were recorded, belonging to 6 orders, 20 families and 41 genera from the five selected stations near the river. Orders Cypriniformes and Siluriformes were recorded as the dominant group in the fish fauna community that comprises 34.55% and 30.91% of total species, respectively. Various types of Small Indigenous Species (SIS) and a total of 26 International Union for Conservation of Nature (IUCN) red-listed species were recorded. Population indices, viz. Shannon–Weaver index (H), Simpson’s dominance index (D), Simpson’s index of diversity (1-D), Margalef’s index (d) and Evenness (E), were applied to demonstrate the species diversity, richness and evenness of fish, and their overall values were 1.28-1.48, 0.26-0.33, 0.67-0.74, 1.22-1.46 and 0.77-0.86, respectively. To sustain the prospect of fisheries biodiversity in the Jamuna River of Bangladesh, different fish management and conservation plan of action specifically establishing and maintaining fish sanctuaries, banning indiscriminate fishing and the use of destructive fishing gears for the protection of the breeding and nursery grounds of fish should be taken into consideration with utmost priority.
Some notes on complex symmetric operators
Authors: Ferreira Marcos S. 
Published: December 2021

Abstract
In this paper we show that every conjugation C on the Hardy-Hilbert space H
2 is of type C = T *
𝒥T, where T is an unitary operator and

𝒥
f

(
z
)

=

f

(

z
¯

)

¯

\mathcal{J}f\left( z \right) = \overline {f\left( {\bar z} \right)}

with f ∈ H
2. Moreover we prove some relations of complex symmetry between the operators T and |T|, where T = U |T| is the polar decomposition of bounded operator T ∈ ℒ(ℋ) on the separable Hilbert space ℋ.
Effect of alpha-lipoic acid on arterial stiffness parameters in type 2 diabetes mellitus patients with cardiac autonomic neuropathy
Authors: Serhiyenko Victoria A. , Serhiyenko Ludmila M. , Sehin Volodymyr B. , Serhiyenko Alexandr A. 
Published: December 2021

Abstract

Objective. Significantly underdiagnosed, diabetes-associated cardiac autonomic neuropathy (CAN) causes a wide range of cardiac disorders that may cause life-threatening outcomes. This study investigated the effects of alpha-lipoic acid (ALA) on arterial stiffness and insulin resistance (IR) parameters in type 2 diabetes mellitus (T2D) patients and definite CAN.

Methods. A total of 36 patients with T2D and a definite stage of CAN were recruited. This investigation was carried out on two separate arms: traditional hypoglycemic therapy (n=18, control) and ALA (n=18) 600 mg in film-coated tablets/q.d. in addition to traditional hypoglycemic therapy. The duration of the study was three months.

Results. In subjects with T2D and definite stage of СAN, treatment with ALA resulted in a significant decrease of glucose, immunoreactive insulin concentration, and Homeostasis Model Assessment (HOMA)-IR (HOMA-IR) parameters; pulse wave velocity (PWV), aorta augmentation index (AIxao) during the active period of the day and decrease of PWV, AIxao, and brachial augmentation index during the passive period of the day compared with the results, obtained in the control group. Therefore, the administration of ALA to patients with T2D for three months promotes the improvement of glucose metabolism and arterial stiffness parameters.

Conclusions. In patients with T2D and definite stage of СAN treatment with ALA improved HOMA-IR and arterial stiffness parameters. These findings can be of clinical significance for the complex treatment of diabetes-associated CAN.
Nutrition management of Niemann Pick disease type C: A case report
Authors: Viana dos Santos Rejane , das Neves Ferreira Tamila , Oliveira de Almeida Daniela , Brito da Silva Fatal Lilian , Queiroz Araujo Edilene Maria 
Published: December 2021

Abstract

Objectives. We aim to report the clinical repercussions of a nutritional approach in a patient diagnosed with Niemann Pick disease type C (NPC) using miglustat as pharmacological therapy.

Case report. A 33-year-old woman diagnosed with NPC using miglustat was instructed to look for a dietary management at our nutrition service. Patient’s symptoms were weight loss and important gastrointestinal alterations. Our nutritional prescription was a high-calorie and high-protein, lactose- and sucrose-free diet, as well as a daily supplementation of L-glutamine, probiotics, omega 3, and coenzyme Q10. After two months, the patient had weight gain and improvement in the intestinal health.

Conclusions. We found that nutritional prescription aided in the treatment of NPC and revealed that nutritional care represents an important strategy in the management of rare genetic diseases.
Growth Opportunities Utilization: Debt Overhang or Asymmetric Information?
Authors: Martono S. , Yulianto Arief , Wijaya Angga Pandu 
Published: December 2021

Abstract
Inter-industry has various capital structures to take advantage of growth opportunities due to agency differences and information asymmetric problems. This research aims to analyze: (1) the differences in leverage between industries and (2) the impact of shareholders–debtholders conflict and information asymmetric on growth opportunities. The firm-level data used is extracted from Indonesia Stock Exchange's annual reports from 2008 to 2019. Authors used the analysis of variance (ANOVA). The findings show differences in leverage between industries. However, they are relatively stable and not excessive for assets to prevent conflicts between managers and shareholders with debtholders. Equity is also not used to utilize growth to reduce the discretionary power (dilution) of shareholders. As a result, the use of opportunities and growth is limited. This study identifies agency problems and asymmetric information that determines independent companies' decisions in exploiting growth opportunities.
Slump Test: A New Empirical Model for High Yield Stress Materials
Authors: Kemer H. , Bouras R. , Sonebi M. , Mesboua N. , Benmounah A. 
Published: December 2021

Abstract
In order to decrease the fitting deviation between rheometrical measurements and empirical parameters using slump test, this paper proposes a new analytical method to evaluate the high yield stress of materials (cement pastes).In doing so, an experimental study was performed for measuring the empirical characteristics by cylindrical mold with different water to binder ratios (w/b) by aiming to increase the yield stress. Parallelly, experimental observations showed clearly the unyielded zone at flow stoppage of high yield stress samples. Based on these results, an idea was formed to applied metallic element at inlet of mold in order to push the spreading of paste. The obtained results of the model proposed in this paper were compared with the yield stress evaluated from shear flow curves using AR2000-rheometer with plate-plate geometry at rate-controlled. In fact, this study demonstrates the applicability and novelty of the present model in the process of relating the empirical parameters to yield stress.
Average Operating Pressure Effect on Water Supply Systems Performances. A Case Study for 12 Romanian Small Water Distribution Networks
Authors: Vitan E. , Hotupan Anca , Hadarean Adriana 
Published: December 2021

Abstract
The performance evaluation of an implemented water distribution network is in tight relation with the choice of adequate measures for water loss reduction. Hence, the consequences of placing the water network in a wrong performance category are bad and will conduct to unreasonably costs or considerable water loss volumes. Therefore, the evaluation of the water network performance level based on both Non-Revenue Water (NRW) and Infrastructure Leakage Index (ILI) indicators is to be recommended. This paper deals with the performance evaluation of water distribution systems based on the calculated performance indicators NRW and ILI. For this purpose, collected data for a period of one year from 12 Romanian small water distribution systems and two simplified average pressure determination methods were used.
Use of Technological Diagnosis in Rail Vehicle Engines Maintenance
Authors: Ondriga Jozef , Hrček Slavomír , Brumerčík František , Lukáč Michal 
Published: December 2021

Abstract
The paper aims to classify the maintenance of internal combustion engines in 812 series diesel multiple units, to analyse operating failures, and to identify methods and procedures for determining their current mechanical condition. The paper specifies the required procedures and methods for maintenance starting from the development of the DMU (diesel multiple units) 812 series to the present. It also focuses on understanding how diagnosis and control sensors are attached in individual cable harnesses. A protocol for diagnosing combustion engine defects is proposed in the final part of the paper. A part of the paper is a proposed list of codes for individual faults to facilitate the work. Another method proposed within this paper is the definition and attachment of individual sensor connections on the engine in the EDC (Electronic Diesel Control) M(S) 5 cable harness. Faults leading to engine stop are identified.
The Effect of the Range of a Modulating Phase Mask on the Retrieval of a Complex Object from Intensity Measurements
Authors: Karitans V. , Ozolinsh M. , Lapins A. , Fomins S. 
Published: December 2021

Abstract
In many fields of science, it is often impossible to preserve the information about the phase of the electromagnetic field, and only the information about the magnitude is available. This is known as the phase problem. Various algorithms have been proposed to recover the information about phase from intensity measurements. Nowadays, iterative algorithms of phase retrieval have become popular. Many of these algorithms are based on modulating the object under study with several masks and retrieving the missing information about the phase of an object by applying mathematical optimization methods. Several of these algorithms are able to retrieve not only the phase but also the magnitude of the object under study. In this study, we investigate the effect of the range of modulation of a mask on the accuracy of the retrieved magnitude and phase map. We conclude that there is a sharp boundary of the range of modulation separating the successfully retrieved magnitude and phase maps from those retrieved unsuccessfully. A decrease in the range of modulation affects the accuracy of the retrieved magnitude and phase map differently.
Influence of “Productive” Impurities (Cd, Na, O) on the Properties of the Cu2ZnSnS4 Absorber of Model Solar Cells
Authors: Sergeyev D. , Zhanturina N. , Aizharikov A. , Popov A.I. 
Published: December 2021

Abstract
The study focuses on the optical properties of the CZTS multicomponent semiconductor absorber with 3 % “production” impurities of Cd, Na, O within the framework of the density functional theory using the generalized gradient approximation and the SCAPS program, as well as investigates their influence on the performance and efficiency of CZTS-solar cells. The results showed that the introduction of Cd, Na, O impurities would lead to a decrease in the intensity of the absorption bands at 2.06 eV and 2.55 eV. The density of states CZTS: (Cd, Na, O) was determined from first principles, and it was revealed that impurities of Cd and O atoms would lead to a decrease in the band gap (to 0.9 eV and 0.79 eV), and an increase in Na impurity absorption (1.2 eV). It was also found that a decrease in the band gap led to a decrease in the open circuit voltage, and it was also shown that “industrial” impurities led to a decrease in the efficiency of energy conversion of solar cells to 2.34 %.
WO3 as Additive for Efficient Photocatalyst Binary System TiO2/WO3
Authors: Knoks A. , Kleperis J. , Bajars G. , Grinberga L. , Bogdanova O. 
Published: December 2021

Abstract
Two different methods of synthesis of TiO2/WO3 heterostructures were carried out with the aim to increase photocatalytic activity. In this study, anodic TiO2 nanotube films were synthesized by electrochemical anodization of titanium foil. WO3 particles were applied to anodic Ti/TiO2 samples in two different ways – by electrophoretic deposition (EPD) and insertion during the anodization process. Structural and photocatalytic properties were compared between pristine TiO2 and TiO2 with incorporated WO3 particles. Raman mapping was used to character-ise the uniformity of EPD WO3 coating and to determine the structural composition. The study showed that deposition of WO3 onto TiO2 nanotube layer lowered the band gap of the binary system compared to pristine TiO2 and WO3 influence on photo-electrochemical properties of titania. The addition of WO3 increased charge carrier dynamics but did not increase the measured photo-current response. As the WO3 undergoes a phase transition from monoclinic to orthorhombic at approximately 320 ℃ proper sequence WO3 deposition could be beneficial. It was observed that secondary heat treatment of WO3 lowers the photocurrent.
Investigation of the Flow-Based Fast Reroute Model with Implementation of a Multimedia Quality Protection Scheme
Authors: Lemeshko O. , Yevdokymenko M. , Yeremenko O. , Kunicina N. , Ziravecka A. 
Published: December 2021

Abstract
In this paper, a tensor flow-based fast reroute model with multimedia quality protection is proposed. In the model, the conditions for implementing a multipath routing strategy and flow conservation are introduced taking into account possible packet loss at the network nodes and preventing overloading communication links both when using the primary and backup routes. At the same time, the novelty of the proposed solution is the formalization of the conditions of protection of the Quality of Experience level in terms of multimedia quality along the primary and backup routes. These conditions have been obtained during the tensor formalization of the network, which made it possible to calculate the quality of service indicators: packet loss probabilities, as well as the average end-to-end delay for audio and video flows transmitted in the multimedia session using the primary and backup routes, respectively. As a criterion for the optimality of the obtained solutions, a condition has been selected related to maximizing the overall performance of the infocommunication network. The results of the research of the proposed model confirm the adequacy of the numerical research results obtained for solving the problem of fast rerouting with link/node protection.
Antecedents of Service Innovative Behavior: The Role of Spiritual Leadership and Workplace Spirituality
Authors: Alfarajat Hebah Suliman , Emeagwali Okechukwu Lawrence 
Published: December 2021

Abstract

Background: Managers in labor-intensive industries are facing challenges on how to encourage innovation, as services are mostly offered by employees and not machines. Intense competition in the service and hospitality industry calls for more innovative work behavior exhibition among employees, and the question on how enterprises can nurture innovative behavior remains unanswered. The objective of the research is to clarify the inter-relationship between spiritual leadership and workplace spirituality and how their collective effect can nurture employee service innovative behavior in the hospitality industry by drawing on relational energy theory.

Methodology: Data were obtained using a survey quantitative research method based on a convenience sampling technique from (n = 867) employees working in four- and five-star Jordanian hotels. A partial least squares structural equation modeling (PLS-SEM) technique was applied to assess the proposed research model and hypotheses.

Results: Findings from PLS-SEM show that spiritual leadership impacts and increases the level of workplace spirituality and service innovative behavior among employees. Workplace spirituality increases the level of service innovative behavior and mediates the relationship between spiritual leadership and service innovative behavior.

Conclusion: Spiritual leadership and workplace spirituality initiatives and practices can be beneficial for hospitality enterprises in terms of service innovative behavior. Moreover, the key point is that hospitality HR practitioners should not only focus on selecting, training, and appointing leaders with spiritual characteristics, but also on creating a spiritual work atmosphere to enable employees to exhibit service innovative behaviors. The results did not only advance our knowledge concerning the nexus and importance of spirituality in the workplace, but also validates and reveals the importance of spirituality on innovative behavior in the Arabian context.
Narcissistic Leadership and Workplace Deviance: A Moderated Mediation Model of Organizational Aggression and Workplace Hostility
Authors: Alhasnawi Hussein Hurajah , Abbas Ali Abdulhassan 
Published: December 2021

Abstract

Background: Workplace Deviance are among the most common phenomena observed in organizations. This might be attributed to narcissistic style of leadership and the manifestations of organizational aggression. It is further aggravated by increased workplace hostility. The main purpose of this research is to observe the impact of moderated mediation of organizational aggression and workplace hostility upon the relationship between narcissistic leadership and workplace deviance.

Methodology: A cross-sectional investigation was conducted using self-survey method. With 673 participants in the study, the author used an electronic questionnaire (Google Forms) to collect data from employees working at five food product companies in Iraq. Mediation model, moderation analysis, and moderated mediation models were evaluated using Structural Equation Modeling (SEM) for which AMOS V.23 software was used.

Results inferred that organizational aggression partially mediates a positive relationship between narcissistic leadership and workplace deviance. Further, the relationship between organizational aggression and workplace deviance depends on the changes in level of workplace hostility. Moreover, the study empirically supports the fundamentals of moderated mediation model. In other terms, the study infers that indirect effect of narcissistic leadership in workplace deviance through organizational aggression has been significantly moderated by workplace hostility.

Conclusion: When leaders adopt narcissistic behaviors to achieve their personal interests, it leads to increased organizational aggression and workplace deviance that eventually increase the levels of workplace hostility. Accordingly, moderated mediation model provides a better understanding about how narcissistic leadership, organizational aggression, and workplace hostility all work together to influence workplace deviance.