bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Context of Public Policy on the Sharing Economy
Authors: Koczetkow Błażej , Klimczuk Andrzej 
Published: January 2022

AbstractThe purpose of this chapter is to analyse approaches to the sharing economy from the perspective of public policy science. In the first part of the text, attention is paid to perceiving the development of the emerging sharing economy not only as phenomenon with positive economic effects but also as a set of public problems (e.g., on the labour market and for existing economic structures) that require intervention at the level of national governments as well as at international level. Subsequent sections identify possible actions for regulating the development of the sharing economy. The role of soft law, stakeholders’ networks, self-regulation and standardisation are discussed in the chapter. The summary includes potential directions for further research.
From Uberisation to Commoning: Experiences, Challenges, and Potential Pathways of the Sharing Economy in Food Supply Chains in Europe
Authors: Simonovits Bori , Balázs Bálint 
Published: January 2022

AbstractThe chapter explores a broad dimensionality of experiences, learnings, challenges, and potential pathways of the sharing economy in food supply chains. Through technology-enabled business applications, the mobilisation of underutilised assets has been successfully facilitated in the foodservice industry. Community-based models have been relying on the mutual risk-sharing of producers and consumers. Service models and the uberisation of food, when contract workers use their personal vehicles to deliver food to customers, has gained more acknowledgement during the COVID-19 times. Based on our qualitative study, various peer-to-peer production and collaborative consumption initiatives are presented in this chapter to assess how the idea of sharing economy entered the food sector. Our arguments are substantiated with varied case examples at multiple value chain points (e.g., production, processing, transport, and consumption).
Unpacking the Financial Services and Crowdfunding Evolution in the Sharing Economy
Authors: Lukasiewicz Agnieszka , Santa Mijalche 
Published: January 2022

AbstractSharing economy is a phenomenon emerging in all aspects of social and business practices. While its impact is most prominent in the mobility and accommodation domain, some of the earliest demonstrations of the benefits of the sharing economy have occurred in financial services. Financial services in the sharing economy range from peer-to-peer lending to crowdfunding with participation from new start-ups and incumbent financial service providers with for-profit or non-profit goals. Given the variety of elements represented in financial services, there is a great need to collect and connect what has been done and to identify some common themes, which will serve as a basis for future discussions on the evolution of financial services in the sharing economy.
Smart Contract Vulnerability Detection Based on Symbolic Execution Technology
Authors: Liu Yiping , Xu Jie , Cui Baojiang 
Published: January 2022

AbstractWith the rapid development of the blockchain, smart contract technology has been widely applied. The number of smart contracts has grown at a high rate and nearly at an average of thousands per day. However, the correctness and security of the smart contract itself are facing huge problems. The well-known DAO vulnerability, and Parity multi-signature wallet’ vulnerabilities have leaded to a hundreds of millions dollars loss, and they are both caused by the security problems of smart contracts. Once the smart contract vulnerability is exploited, it is very likely to bring the loss of cryptocurrencies, the disorder of the financial order and other catastrophic consequences. Therefore the security of smart contracts is imminent. This project has designed and implemented a vulnerability detection system of Ethereum smart contract. The system uses the assembly instruction sequences of the smart contract to generate the control flow graph, then performs symbolic execution and vulnerability constraint solving over the control flow. The system can detect some common types of vulnerabilities, such as the integer overflow and underflow vulnerability, reentry vulnerability and unchecked call return value vulnerability. It has a high accuracy of detection result, and gives support for export vulnerability report.
Research on the Relationship Between Chinese Nicknames and Accounts in Social Networks
Authors: Han Yi , Liu Xiangyu , Du Yanhui , Lu Tianliang 
Published: January 2022

AbstractWith the increasing integration of mobile Internet into people’s daily life, generally a user will register several different network applications at the same time. Therefore, there are many virtual identities belonging to one person on the Internet, and the similarity analysis of cross-platform network identities is of great significance in the field of network security. This paper studied the Chinese user nicknames and virtual identity recognition in domestic social networking. Considering that account nicknames, to some extent, can reflect the characteristics of the account owners’ naming habits and preferences, and that the information of nickname is easier to obtain than other registration information, we collected the nickname information of users who registered on three application platforms: WeChat, Weibo and Alipay. At the same time, according to the characteristics of account nicknames and their probability distribution, we determined the characteristic indicators that can be used to calculate the similarity of nicknames. Finally, this paper optimized the Jaro distance and Jaro-Winkler distance algorithms, and proposed an identity algorithm suitable for domestic social networks, especially calculating the similarity of Chinese nicknames, and verified the effectiveness of the algorithm on the basis of large-scale real data.
Celestial OPEs and w1+∞ algebra from worldsheet in string theory
Authors: Jiang Hongliang 
Published: January 2022

Abstract
Celestial operator product expansions (OPEs) arise from the collinear limit of scattering amplitudes and play a vital role in celestial holography. In this paper, we derive the celestial OPEs of massless fields in string theory from the worldsheet. By studying the worldsheet OPEs of vertex operators in worldsheet CFT and further examining their behaviors in the collinear limit, we find that new vertex operators for the massless fields in string theory are generated and become dominant in the collinear limit. Mellin transforming to the conformal basis yields exactly the celestial OPEs in celestial CFT. We also derive the celestial OPEs from the collinear factorization of string amplitudes and the results derived in these two different methods are in perfect agreement with each other. Our final formulae of celestial OPEs are applicable to general dimensions, corresponding to Einstein-Yang-Mills theory supplemented by some possible higher derivative interactions. Specializing to 4D, we reproduce all the celestial OPEs for gluon and graviton in the literature. We consider various string theories, including the open and closed bosonic string, as well as the closed superstring theory with $$ \mathcal{N} $$
N
= 1 and $$ \mathcal{N} $$
N
= 2 worldsheet supersymmetry. In the case of $$ \mathcal{N} $$
N
= 2 string, we also derive all the $$ \overline{\mathrm{SL}\left(2,\mathbb{R}\right)} $$

SL

2
ℝ

¯

descendant contributions in the celestial OPE; the soft sector of such OPE just yields the w1+∞ algebra after rewriting in terms of chiral modes. Our stringy derivation of celestial OPEs thus initiates the first step towards the microscopic realization of celestial CFT dual to string theory in flat spacetime.
Supersymmetric spindles
Authors: Ferrero Pietro , Gauntlett Jerome P. , Sparks James 
Published: January 2022

Abstract
In the context of holography, we analyse aspects of supersymmetric geometries based on two-dimensional orbifolds known as spindles. By analysing spinc spinors on a spindle with an azimuthal rotation symmetry we show that under rather general conditions there are just two possibilities, called the ‘twist’ and the ‘anti-twist’, which are determined by the quantized magnetic flux through the spindle. A special case of the twist is the standard topological twist which is associated with constant and chiral spinors. We construct solutions of D = 5 and D = 4 STU gauged supergravity theories that are dual to D3-branes and M2-branes wrapping spindles, respectively, which realize both the anti-twist, as seen before, but also the twist. For the wrapped D3-brane solutions we reproduce the central charge of the gravity solution from the dual field theory by analysing the anomaly polynomial of $$ \mathcal{N} $$
N
= 4 SYM theory. We also discuss M5-branes wrapped on spindles both from a gravity and a field theory point of view.
Axion string signatures: a cosmological plasma collider
Authors: Agrawal Prateek , Hook Anson , Huang Junwu , Marques-Tavares Gustavo 
Published: January 2022

AbstractWe study early and late time signatures of both QCD axion strings and hyperlight axion strings (axiverse strings). We focus on charge deposition onto axion strings from electromagnetic fields and subsequent novel neutralizing mechanisms due to bound state formation. While early universe signatures appear unlikely, there are a plethora of late time signatures. Axion strings passing through galaxies obtain a huge charge density, which is neutralized by a dense plasma of bound state Standard Model particles forming a one dimensional “atom”. The charged wave packets on the string, as well as the dense plasma outside, travel at nearly the speed of light along the string. These packets of high energy plasma collide with a center of mass energy of up to 109GeV. These collisions can have luminosities up to seven orders of magnitude larger than the solar luminosity, and last for thousands of years, making them visible at radio telescopes even when they occur cosmologically far away. The new observables are complementary to the CMB observables for hyperlight axion strings that have been recently proposed, and are sensitive to a similar motivated parameter range.
Wirksamkeit der Hörgeräteversorgung bei hochgradigem Hörverlust
Authors: Engler Max , Digeser Frank , Hoppe Ulrich 
Published: January 2022

Zusammenfassung
Hintergrund
In der Praxis liegt das unilaterale Einsilberverstehen mit Hörgerät bei 65 dB SPL (EV65(HG)) häufig unter dem maximalen Einsilberverstehen aus dem Sprachaudiogramm (mEV), insbesondere bei Hörgeräteträgern mit hochgradigem Hörverlust. Diese Arbeit zielte darauf ab, den Wirkungsgrad Q der Hörgeräteversorgung, den Quotienten aus EV65(HG) und mEV, bei Hörgeräteträgern mit hochgradigem bis an Taubheit grenzendem Hörverlust zu untersuchen.

Material und Methoden
Es wurden Daten aus In-situ-Messungen, dem Reinton- und Sprachaudiogramm und dem Sprachverstehen mit und ohne Hörgerät von 93 Ohren von 64 Patienten ausgewertet. Die Patienten stellten sich im Jahr 2019 für eine Hörgerätekontrolle in unserem Hörzentrum vor. Es wurden die Abweichung der in-situ gemessenen frequenzabhängigen Ausgangspegelwerte von den Zielvorgaben der präskriptiven Anpassformeln NAL-NL2 und DSL v5.0 analysiert. Für die Parameter EV65(HG) und Q wurden jeweils die Spearman-Korrelationskoeffizienten für den Sprachverständlichkeitsindex (SII) berechnet.

Ergebnisse
Bei mehr als 67 % der Hörgeräteeinstellungen stimmten die Ausgangspegelwerte mit den Zielkurven für NAL-NL2 oder DSL v5.0 im Bereich von ±5 dB für Frequenzen von 0,5 bis 4 kHz für 65 dB SPL überein. Trotzdem wurde das mEV mit Hörgerät bei 65 dB SPL nicht erreicht (mittlere Abweichungen: 34,4 %). EV65(HG) und Q waren jedoch am besten, wenn Zielwerte für DSL v5.0 bei 65 dB SPL erreicht wurden, was mit einem höheren SII einhergeht.

Schlussfolgerung
Für Hörgeräteträger mit hochgradigem bis an Taubheit grenzendem Hörverlust führen die Anpassformeln NAL-NL2 und DSL v5.0 nicht zu einer solchen Verstärkung, dass bei Alltagssprache von 65 dB SPL das mEV erreicht wird. Es bleibt zu untersuchen, ob alternative Präskriptionen mit besserer Hörbarkeit für Eingangspegel von 50 und 65 dB SPL den Wirkungsgrad der Hörgeräteversorgung verbessern könnten.
Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS)
Authors: Jacobs Martin , Hilmers Torben , Leroy Benjamin M. L. , Lemme Hannes , Kienlein Sebastian , Müller Jörg , Weisser Wolfgang W. , Pretzsch Hans 
Published: January 2022

AbstractKey messageTLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level.AbstractFoliation strongly determines all tree growth processes but can be reduced by various stress factors. Insect defoliation starts at variable times and is one stress factor that may affect photosynthetic processes and cause immediate reactions like refoliation, which are difficult to detect by surveys repeated at 1-year intervals. This study used a large-scale field experiment in German oak/mixed forests affected by gypsy moths (Lymantria dispar) to test the use of terrestrial laser scanning (TLS) for detecting inter-annual foliation and growth losses at the individual tree level caused by the gypsy moth. The experiment comprised two levels of gypsy moth defoliation risk, high (H) and low (L), as well as two pest control treatment levels: spraying with the insecticide Mimic (M) or unsprayed control (C). The factorial design consisted of four treatment combinations (HC, HM, LC, and LM), applied to 11 spatial blocks with a total of 44 plots. The TLS approach detected the defoliation caused by the gypsy moth, estimated as leaf area and crown perforation parameters. For the first time, TLS-derived tree foliation was evaluated based on inter-annual stem growth. Leaf area and crown perforation showed a correlation of + 0.6 and – 0.35, respectively, with basal area increments. Furthermore, this study revealed subsequent growth losses in the same year due to defoliation. Our results show that TLS can offer new opportunities to develop new indicators that monitor foliation at the individual tree level. The crown perforation can describe defoliation or the tree’s vitality based on one scanning campaign, whereas the leaf area needed at least two.
Would they do it again? Final treatment decisions in malignant brain tumour patients—a caregiver’s perspective
Authors: Rapp Marion , von Sass Christiane , Backhaus Clara , Hänggi Daniel , Kamp Marcel Alexander , Sabel Michael 
Published: January 2022

Abstract
Purpose
Overall survival of malignant brain tumour patients has significantly been increased over the last years. However, therapy remains palliative, and side effects should be balanced. Once terminal phase is entered, both patients and caregivers may find it hard to accept, and further therapies are demanded. But little is known about this highly sensitive period. Therefore, we analysed the last therapy decisions from the family caregiver’s perspective. Would they support their beloved ones in the same way or would they now recommend a different therapy decision?

Methods
Caregivers of deceased malignant brain tumour patients, treated at our neurooncological centre between 2011 and 2017, were included. We designed a questionnaire to analyse the impact of the last therapy decision (resection, chemotherapy, radiotherapy), focusing on probable repeat of the choice taken and general therapy satisfaction. Independent variables, for example “satisfaction with therapy”, were analysed using linear regression analysis, the coefficient of determination R2 and the standardized regression coefficient β. The binary logistic regression analyses were taken to illustrate relationships with the dichotomously scaled outcome parameter “re-choice of therapy”. Odds ratio analyses were used to determine the strength of a relationship between two characteristics.

Results
Data from 102 caregivers (life partners (70.6%)) were analysed retrospectively. Each 40% of patients died in a hospice or at home (20% in a hospital). In 67.6% the last therapy was chemotherapy followed by radiotherapy (16.7%) and surgery (15.7%). A positive evaluation of the last therapy was significantly correlated to re-choosing of respective therapy (chemo-/radiotherapy: p = 0.000) and satisfaction with informed consent (p = 0.000). Satisfaction regarding interpersonal contact was significantly correlated to satisfaction with resection (p = 0.000) and chemotherapy (p = 0.000 27 caregivers (28.7%) felt overburdened with this situation).

Conclusion
This analysis demonstrates a significant correlation between a positive relation of patient/caregiver/physician and the subjective perception of the latest therapy. It underlines the central role of caregivers, who should be involved in therapy discussions. Neurooncologists should be specially trained in communication and psycho-oncology.
Burden of severe maternal peripartum mental disorders in low- and middle-income countries: a systematic review
Authors: Kalra Harish , Tran Thach , Romero Lorena , Chandra Prabha , Fisher Jane 
Published: January 2022

AbstractPeripartum severe mental disorders (PSMDs) encompass schizophrenia, affective psychosis, and psychotic and non-psychotic forms of bipolar disorders. PSMDs are well documented in high-income countries. However, much less is known about the prevalence of PSMDs in low- and middle-income countries (LMICs). The aim was to review the available literature systematically and estimate the prevalence of PSMDs among women in LMICs. We searched the Ovid MEDLINE, Embase, PsycINFO, CINAHL and Maternity and Infant Care databases systematically from the date of inception to Dec 31, 2020, for English-language publications with data on the prevalence of PSMDs among women in World Bank–defined LMICs. Selection of studies, extraction of data and assessment of study quality were each undertaken independently by at least two of the investigators. A total of five studies (completed in three countries spanning two continents) met the inclusion criteria. Five studies reported cumulative incidence of postpartum psychosis (ranging from 1.1 to 16.7 per 1000 births). We found no studies on the prevalence of severe mental disorder during pregnancy in these settings. Marked heterogeneity in methodology precluded meta-analysis. These findings indicate that PSMDs occur at a similar prevalence in low- and middle-income to high-income countries. However overall, there is a paucity of high-quality evidence from these settings. There is a need for rigorous studies with standardized methods to increase knowledge of the nature, prevalence, and determinants of PSMDs among women in resource-constrained LMICs to inform policies, service development, program planning and health professional training.
A design space for RDF data representations
Authors: Sagi Tomer , Lissandrini Matteo , Pedersen Torben Bach , Hose Katja 
Published: January 2022

AbstractRDF triplestores’ ability to store and query knowledge bases augmented with semantic annotations has attracted the attention of both research and industry. A multitude of systems offer varying data representation and indexing schemes. However, as recently shown for designing data structures, many design choices are biased by outdated considerations and may not result in the most efficient data representation for a given query workload. To overcome this limitation, we identify a novel three-dimensional design space. Within this design space, we map the trade-offs between different RDF data representations employed as part of an RDF triplestore and identify unexplored solutions. We complement the review with an empirical evaluation of ten standard SPARQL benchmarks to examine the prevalence of these access patterns in synthetic and real query workloads. We find some access patterns, to be both prevalent in the workloads and under-supported by existing triplestores. This shows the capabilities of our model to be used by RDF store designers to reason about different design choices and allow a (possibly artificially intelligent) designer to evaluate the fit between a given system design and a query workload.
Joanne Knight Breast Health Cohort at Siteman Cancer Center
Authors: Colditz Graham A. , Bennett Debbie L. , Tappenden Jennifer , Beers Courtney , Ackermann Nicole , Wu Ningying , Luo Jingqin , Humble Sarah , Linnenbringer Erin , Davis Kia , Jiang Shu , Toriola Adetunji T. 
Published: January 2022

AbstractPurposeThe Joanne Knight Breast Health Cohort was established to link breast cancer risk factors, mammographic breast density, benign breast biopsies and associated tissue markers, and blood markers in a diverse population of women undergoing routine mammographic screening to study risk factors and validate models for breast cancer risk prediction.MethodsWomen were recruited from November 2008 to April 2012 through the mammography service at the Joanne Knight Breast Health Center at Washington University in St. Louis, Missouri. Baseline questionnaire risk factors, blood, and screening mammograms were collected from 12,153 women. Of these, 1,672 were excluded for prior history of any cancer (except non-melanoma skin) or diagnosis of breast cancer within 6 months of blood draw/registration for the study, for a total of 10,481 women. Follow-up is through linking to electronic health records, tumor registry, and death register. Routine screening mammograms are collected every 1–2 years and incident benign breast biopsies and cancers are identified through record linkage to pathology and tumor registries. Formal fixed tissue samples are retrieved and stored for analysis. County-level measures of structural inequality were derived from publicly available resources.ResultsCohort Composition: median age at entry was 54.8 years and 26.7% are African American. Through 2020, 74% of participants have had a medical center visit within the past year and 80% within the past 2 years representing an average of 9.7 person-years of follow-up from date of blood draw per participant. 9,997 women are continuing in follow-up. Data collected at baseline include breast cancer risk factors, plasma and white blood cells, and mammograms prior to baseline, at baseline, and during follow-up.ConclusionThis cohort assembled and followed in a routine mammography screening and care setting that serves a diverse population of women in the St. Louis region now provides opportunities to integrate study of questionnaire measures, plasma and DNA markers, benign and malignant tissue markers, and repeated breast image features into prospective evaluation for breast cancer etiology and outcomes.