bluuebunny/crossref_metadata_2025_split huggingface dataset:
A perturbation analysis based on group sparse representation with orthogonal matching pursuit
Authors: Liu Chunyan , Zhang Feng , Qiu Wei , Li Chuan , Leng Zhenbei 
Published: November 2020

Abstract
In this paper, by exploiting orthogonal projection matrix and block Schur complement, we extend the study to a complete perturbation model.
Based on the block-restricted isometry property (BRIP), we establish some sufficient conditions for recovering the support of the block 𝐾-sparse signals via block orthogonal matching pursuit (BOMP) algorithm.
Under some constraints on the minimum magnitude of the nonzero elements of the block 𝐾-sparse signals, we prove that the support of the block 𝐾-sparse signals can be exactly recovered by the BOMP algorithm in the case of

ℓ
2

\ell_{2}

and

ℓ
2

/

ℓ
∞

\ell_{2}/\ell_{\infty}

bounded total noise if 𝑨 satisfies the BRIP of order

K
+
1

K+1

with

δ

K
+
1

<

1

K
+
1

⁢

(

1
+

ϵ
A

(

K
+
1

)

)

2

+

1

(

1
+

ϵ
A

(

K
+
1

)

)

2

-
1

.

\delta_{K+1}<\frac{1}{\sqrt{K+1}(1+\epsilon_{\boldsymbol{A}}^{(K+1)})^{2}}+\frac{1}{(1+\epsilon_{\boldsymbol{A}}^{(K+1)})^{2}}-1.

In addition, we also show that this is a sharp condition for exactly recovering any block 𝐾-sparse signal with the BOMP algorithm.
Moreover, we also give the reconstruction upper bound of the error between the recovered block-sparse signal and the original block-sparse signal.
In the noiseless and perturbed case, we also prove that the BOMP algorithm can exactly recover the block 𝐾-sparse signal under some constraints on the block 𝐾-sparse signal and

δ

K
+
1

<

2
+

2

2
⁢

(

1
+

ϵ
A

(

K
+
1

)

)

2

-
1

.

\delta_{K+1}<\frac{2+\sqrt{2}}{2(1+\epsilon_{\boldsymbol{A}}^{(K+1)})^{2}}-1.

Finally, we compare the actual performance of perturbed OMP and perturbed BOMP algorithm in the numerical study.
We also present some numerical experiments to verify the main theorem by using the completely perturbed BOMP algorithm.
Direct and inverse scalar scattering problems for the Helmholtz equation in ℝ
m
Authors: Smirnov Yury G. , Tsupak Aleksei A. 
Published: November 2020

Abstract
The boundary value problem for the Helmholtz equation in the m-dimensional free space is considered. The problem is reduced to the Lippmann–Schwinger integral equation over the inhomogeneity domain. The operator of the integral equation is shown to be an invertible Fredholm operator. The inverse coefficient problem is considered. An application of the two-step method reduces the inverse problem to the source-type integral equation with a smooth kernel. Special classes of solutions to this equation are introduced. The uniqueness of a solution to the integral equation of the first kind is proved in the defined function classes.
Additional bi-clausal types of Japanese right-dislocations
Authors: Furuya Kaori 
Published: November 2020

Abstract
This article reexamines the syntax of Japanese Right Dislocation Constructions (RDCs) relative to their prosodic structures and explores their clausal nature. In the literature on Japanese RDCs, two major issues have been addressed: a mono-versus a bi-clausal structure and movement versus base-generation in terms of postverbal elements along with the identification of preverbal null elements. However, the prosodic structures of the constructions remain unexplored. The present article shows that the same surface string of an RDC may possibly have different prosodic structures and bear corresponding interpretations. This remarkable fact poses a challenge to a uniform analysis of the constructions. The article argues that Japanese RDCs are divided into mono- and bi-clausal types. While defending a mono-clausal analysis with movement for some RDCs, the present article proposes additional bi-clausal analyses besides the most prevailing analysis of other RDCs. The evidence suggests that Japanese RDCs make use of different linguistic strategies.
Lattice Sieving in Three Dimensions for Discrete Log in Medium Characteristic
Authors: McGuire Gary , Robinson Oisín 
Published: November 2020

Abstract
Lattice sieving in two dimensions has proven to be an indispensable practical aid in integer factorization and discrete log computations involving the number field sieve. The main contribution of this article is to show that a different method of lattice sieving in three dimensions will provide a significant speedup in medium characteristic. Our method is to use the successive minima and shortest vectors of the lattice instead of transition vectors to iterate through lattice points. We showcase the new method by a record computation in a 133-bit subgroup of

F

p
6

${{\mathbb{F}}_{{{p}^{6}}}}$

, with p
6 having 423 bits. Our overall timing is nearly 3 times faster than the previous record of a 132-bit subgroup in a 422-bit field. The approach generalizes to dimensions 4 or more, overcoming one key obstruction to the implementation of the tower number field sieve.
Pseudo-free families of computational universal algebras
Authors: Anokhin Mikhail 
Published: November 2020

Abstract
Let Ω be a finite set of finitary operation symbols. We initiate the study of (weakly) pseudo-free families of computational Ω-algebras in arbitrary varieties of Ω-algebras. A family (Hd
| d ∈ D) of computational Ω-algebras (where D ⊆ {0, 1}*) is called polynomially bounded (resp., having exponential size) if there exists a polynomial η such that for all d ∈ D, the length of any representation of every h ∈ Hd
is at most

η
(
|
d
|
)

(

resp
.,

|

H
d

|

≤

2

η
(
|
d
|
)

)

.

$\eta (|d|)\left( \text{ resp}\text{., }\left| {{H}_{d}} \right|\le {{2}^{\eta (|d|)}} \right).$

First, we prove the following trichotomy: (i) if Ω consists of nullary operation symbols only, then there exists a polynomially bounded pseudo-free family; (ii) if Ω = Ω
0 ∪ {ω}, where Ω
0 consists of nullary operation symbols and the arity of ω is 1, then there exist an exponential-size pseudo-free family and a polynomially bounded weakly pseudo-free family; (iii) in all other cases, the existence of polynomially bounded weakly pseudo-free families implies the existence of collision-resistant families of hash functions. In this trichotomy, (weak) pseudo-freeness is meant in the variety of all Ω-algebras. Second, assuming the existence of collision-resistant families of hash functions, we construct a polynomially bounded weakly pseudo-free family and an exponential-size pseudo-free family in the variety of all m-ary groupoids, where m is an arbitrary positive integer.
A trade-off between classical and quantum circuit size for an attack against CSIDH
Authors: Biasse Jean-François , Bonnetain Xavier , Pring Benjamin , Schrottenloher André , Youmans William 
Published: November 2020

AbstractWe propose a heuristic algorithm to solve the underlying hard problem of the CSIDH cryptosystem (and other isogeny-based cryptosystems using elliptic curves with endomorphism ring isomorphic to an imaginary quadratic order 𝒪). LetΔ= Disc(𝒪) (in CSIDH,Δ= −4pforpthe security parameter). Let 0 <α< 1/2, our algorithm requires:A classical circuit of size2O˜log(|Δ|)1−α.$2^{\tilde{O}\left(\log(|\Delta|)^{1-\alpha}\right)}.$A quantum circuit of size2O˜log(|Δ|)α.$2^{\tilde{O}\left(\log(|\Delta|)^{\alpha}\right)}.$Polynomial classical and quantum memory.Essentially, we propose to reduce the size of the quantum circuit below the state-of-the-art complexity2O˜log(|Δ|)1/2$2^{\tilde{O}\left(\log(|\Delta|)^{1/2}\right)}$at the cost of increasing the classical circuit-size required. The required classical circuit remains subexponential, which is a superpolynomial improvement over the classical state-of-the-art exponential solutions to these problems. Our method requires polynomial memory, both classical and quantum.
Towards Isogeny-Based Password-Authenticated Key Establishment
Authors: Taraskin Oleg , Soukharev Vladimir , Jao David , LeGrow Jason T. 
Published: November 2020

Abstract
Password authenticated key establishment (PAKE) is a cryptographic primitive that allows two parties who share a low-entropy secret (a password) to securely establish cryptographic keys in the absence of public key infrastructure. We propose the first quantum-resistant password-authenticated key exchange scheme based on supersingular elliptic curve isogenies. The scheme is built upon supersingular isogeny Diffie-Hellman [15], and uses the password to generate permutations which obscure the auxiliary points. We include elements of a security proof, and discuss roadblocks to obtaining a proof in the BPR model [1]. We also include some performance results.
SLC25A19 deficiency and bilateral striatal necrosis with polyneuropathy: a new case and review of the literature
Authors: Porta Francesco , Siri Barbara , Chiesa Nicoletta , Ricci Federica , Nika Lulash , Sciortino Paola , Spada Marco 
Published: November 2020

Abstract

Objectives
Biallelic mutations in the SLC25A19 gene impair the function of the thiamine mitochondrial carrier, leading to two distinct clinical phenotypes. Homozygosity for the c.530G > C mutation is invariably associated to Amish lethal microcephaly. The second phenotype, reported only in 8 patients homozygous for different non-Amish mutations (c.373G > A, c.580T > C, c.910G > A, c.869T > A, c.576G > C), is characterized by bilateral striatal necrosis and peripheral polyneuropathy. We report a new patient with the non-Amish SLC25A19 phenotype showing compound heterozygosity for the new variant c.673G > A and the known mutation c.373G > A.

Case presentation
The natural history of non-Amish SLC25A19 deficiency is characterized by acute episodes of fever-induced encephalopathy accompanied by isolated lactic acidosis and Leigh-like features at magnetic resonance imaging (MRI). Acute episodes are prevented by high-dose thiamine treatment (600 mg/day). As shown in the new case, both mild clinical signs and basal ganglia involvement can precede the acute encephalopathic onset of the disease, potentially allowing treatment anticipation and prevention of acute brain damage. Peripheral axonal neuropathy, observed in 7 out of 9 patients, is not improved by thiamine therapy. In two early treated patients, however, peripheral neuropathy did not occur even on long-term follow-up, suggesting a potential preventive role of treatment anticipation also at the peripheral level.

Conclusions
Non-Amish SLC25A19 deficiency is an extra-rare cause of Leigh syndrome responsive to thiamine treatment. Ex adiuvantibus thiamine treatment is mandatory in any patient with Leigh-like features.
First report on the nationwide prevalence of paediatric type 1 diabetes in Serbia and temporal trends of diabetes ketoacidosis at diagnosis—a multicentre study
Authors: Stankovic Sandra , Vukovic Rade , Vorgucin Ivana , Zdravkovic Vera , Folic Nevena , Zivic Sasa , Ignjatovic Aleksandra , Rancic Natasa , Milenkovic Tatjana , Todorovic Slađana , Mitrovic Katarina , Jesic Maja , Sajic Silvija , Bojic Vlada , Katanic Dragan , Dautovic Slavica , Cvetkovic Vesna , Saranac Ljiljana , Markovic Slavica , Tucakovic Tatjana , Lesovic Snezana , Ljubojevic Mirjana , Ilic Tatjana , Vrebalov Mirjana , Mikic Marina , Jelenkovic Bratimirka , Petrovic Rada , Saric Snezana , Simić Danijela , Cukanovic Milanko , Stankovic Miodrag 
Published: November 2020

Abstract
We aimed to collect data on all paediatric patients who were diagnosed with type 1 diabetes mellitus (T1DM) between the years 2000 and 2019 in Serbia and estimate for the first time its prevalence. Also, the trends of diabetes ketoacidosis (DKA) occurrence at the time of diagnosis are monitored. We collected and retrospectively analysed the data of patients <19 years with newly diagnosed T1DM. T1DM was diagnosed in 3134 patients (53.2% male). Total number of youth <19 years with T1DM was 1735 with prevalence of 135.25/100000 at the end of study period. T1DM was diagnosed most frequently between the ages of 5 and 11 years (42.1%). At the time of diagnosis, 35.7% presented in DKA. The incidence and severity of DKA were more significant at the youngest age (p<0.001). There were significant annual percentage increase (2.2%) in the number of new cases of DKA (p=0.007). Conclusion: This first report of nationwide prevalence of T1DM in youth shows that Serbia is among countries with high prevalence of T1DM in youth. System changes are needed in order to provide better quality of health care to these patients.
A considerable asymptomatic proportion and thromboembolism risk of pregnant women with COVID-19 infection in Wuhan, China
Authors: Wang Yulan , Liang Xinyue , Wang Hui , Li Li , Xiong Guoping , Mi Lan 
Published: November 2020

Abstract

Objectives
The coronavirus disease 2019 (COVID-19) had become a worldwide pandemic, however, information is limited on the asymptomatic proportion and thromboembolism risk of pregnant women with infection.

Methods
All 32 pregnant women with COVID-19 who were admitted to the hospital in Wuhan during the outbreak from January 20 to March 18, 2020, were retrospectively reviewed for the clinical records, laboratory tests, chest CT scans, and neonatal outcomes.

Results
There were 17 of the 32 patients (53%) with no subjective symptoms before admission, and 13 (41%) remained asymptomatic throughout hospitalization. There were 28 patients (88%) showing typical radiographic evidence of pneumonia on chest CT. The patients with COVID-19 were found in an increased risk of thromboembolism with much higher D-dimer levels than uninfected pregnant women. One neonate with asphyxia and positive immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies was reported.

Conclusions
The considerable asymptomatic proportion of pregnant women with COVID-19 indicates symptom-based screening would miss a number of cases. Chest CT could provide a useful screening resource during the COVID-19epidemic outbreak. Anticoagulation therapy for the postpartum patients may be helpful for good prognosis. The findings provide important information for the hospital isolation, control strategies and clinical therapy.
The effect of mask use on maternal oxygen saturation in term pregnancies during the COVID-19 process
Authors: Toprak Erzat , Bulut Ayça Nazlı 
Published: November 2020

Abstract

Objectives
Our aim was to evaluate the effect of standard surgical and N-95 respiratory mask use on maternal oxygen saturation, vital signs and result on non-stress tests in term pregnancies.

Methods
It is a prospective observational study. The study included healthy, not in labor, singleton pregnant women of 370/7–410/7 weeks who were applied to our hospital for routine obstetric control examination between March 1, 2020, and August 31, 2020. Patients were randomised by coin toss method. Oxygen saturation, systolic, and diastolic arterial blood pressure, pulse, respiratory rate, and temperature of pregnant women using surgical masks and respiratory masks were measured before and after the non-stress test. The tolerance of the masks was also evaluated. Student’s t-test was used for variables showing parametric distribution and the Mann Whitney U-test was used for non-parametric tests. The categorical variables between the groups was analyzed by using the Chi square test or Fisher Exact test. The statistical significance level was taken as p<0.05 in all tests.

Results
A total of 297 pregnant women using masks were included in the study. The effect of mask type on oxygen saturation before and after the non-stress test was found to be significant (97.1±1.8 corresponds to 95.3±2.6 for the surgical mask, p=0.0001; 97.8±1.7 corresponds to 93.7±2.0 for the respiratory mask, p=0.0001). Mask tolerance of patients using respiratory masks was significantly higher than those using surgical masks (mean 8, 1–10, p=0.0001).

Conclusions
Surgical mask and respiratory mask usage decreased significantly in oxygen saturation in term pregnancies.
By Insurers, For Insurers: The UK’s Liability Regime for Autonomous Vehicles
Authors: Davey James 
Published: November 2020

Abstract
The United Kingdom has enacted legislation to govern the liability of highly autonomous vehicles. The chosen method is peculiar, with liability placed on motor (auto) insurers despite the lack of a corresponding liability on road users. This article seeks to explain why the UK government was so invested in maintaining mass market motor insurance policies (instead of a system based on motor manufacturer liability) and suggests that the answer lies in insurers’ desire to harvest customer data. We are the product.
Nero and Britannicus in thepompa circensis: The Circus Procession as Dynastic Ceremony in the Court of Claudius
Authors: Sumi Geoffrey S. 
Published: November 2020

SummaryAs part of the events marking Nero’s assumption of thetoga virilisin 51 CE, he along with Britannicus led the circus procession (pompa circensis) in advance of games in the Circus Maximus. The aim of this paper is to reconstruct thispompa circensis, both in its processional elements and route through the city. The presence of potential successors along with images of the deified and honored dead of the imperial family shows how this ceremony evolved and expanded in the Principate to become a dynastic ceremony. The route of the newly modifiedpompa circensis, marked by monuments built by or dedicated to members of the imperial family, also had become increasingly dynastic. An essential element of thepompa circensiswas the participation of the senate and equestrian order as well as the urban plebs, an act of performed consensus fully realized when the procession ended in the Circus Maximus. This circus procession, as reconstructed here, has further implications for the larger question of the imperial succession under Claudius.
Mapping the Topics and Evolutions of Chinese Children’s Bestsellers
Authors: Hu Jiming , Zheng Xiang , Wen Peng , Xu Jie 
Published: November 2020

Abstract
Children’s books involve a large number of topics. Research on them has been paid much attention to by both scholars and practitioners. However, the existing achievements do not focus on China, which is the fastest growing market for children’s books in the world. Studies using quantitative analysis are low in number, especially on the intellectual structure, evolution patterns, and development trends of topics of children’s bestsellers in China. Dangdang.com, the biggest Chinese online bookstore, was chosen as a data source to obtain children’s bestsellers, and topic words in them were extracted from brief introductions. With the aid of co-occurrence theory and tools of social network analysis and visualization, the distribution, correlation structures, and evolution patterns of topics were revealed and visualized. This study shows that topics of Chinese children’s bestsellers are broad and relatively concentrated, but their distribution is unbalanced. There are four distinguished topic communities (Living, Animal, World, and Child) in terms of centrality and maturity, and they all establish their individual systems and tend to be mature. The evolution of these communities tends to be stable with powerful continuity.
Research on the Factors Influencing the Reading Motivation of Social Media Users from the Perspective of Reading Promotion in China
Authors: Wang Han , Fang Qing , Chen Ye , Guan Lingshuang , Dong Ting 
Published: November 2020

Abstract
With the rapid development of information technology and mobile Internet access, social media content has become extremely abundant and open, and users have become heavily dependent on social reading. As a result, users’ reading motivation has greatly changed from traditional reading to digital reading to social reading. Exploring the potential effects of social reading can contribute to providing strategies to accurately target high-quality reading content to help promote reading with social media. Drawing upon the use and gratifications theory and reading motivation scales, the current study examines the effectiveness of reading motivation to explore in depth the influencing mechanism of users’ reading on social media. Structural equation modeling is employed to empirically test the impact factor model. The results indicate that social media users’ reading motivation mainly includes entertainment, self-presentation, information acquisition, social promotion, and social interaction. Regarding the overall contribution, social motivation is the most important factor in social media reading activities, followed by intrinsic reading motivation and information reading motivation. The findings and their implications are discussed to provide suggestions for social media operators promoting high-quality reading.
Beyond Providing Information: An Analysis on the Perceived Service Quality, Satisfaction, and Loyalty of Public Library Customers
Authors: Oh Dong-Geun 
Published: November 2020

Abstract
This study investigates the customers’ perceptions on three traditional dimensions of the perceived library service quality (library personnel; library resources and user services; and facilities and equipment), customer satisfaction, and customer loyalty of the public library users. Survey data using simplified questionnaires were analyzed which were collected from 1015 users of public libraries in 2015 and 2019 respectively in South Korea. The results show that they were generally satisfied with public library services and want to visit them again and/or recommend them to others based on the good perceptions on the public library service quality, because the means of each variable on a Likert 5-point scale was fairly high: customer satisfaction 3.85, customer loyalty 4.12, and perceived service quality 3.80 (library personnel 3.80, library resources and user services 3.81, and facilities and equipment 3.79). Each of three dimensions of perceived service quality had statistically significant positive impacts both on customer satisfaction and on the loyalty of the users, and that customer satisfaction had statistically significant positive impacts on customer loyalty. Different groups by gender, age, education, and occupation show the mean differences in customer loyalty. This article suggests research and managerial implications and limitations of the study.
Interactional role shift as communicative project in student teachers’ oral presentations
Authors: Christensson Johan 
Published: November 2020

Abstract
Focusing on Swedish student teachers’ oral presentations in a rhetoric class, this article studies interactional role shift as a multimodal practice. The role shifts under scrutiny concern shifting from student teacher to teacher, thus anticipating the students’ future profession. A central feature of the article is a discussion of how role shift may be conceptualised as a communicative project, thus highlighting the different modes of communication used by the students, and consequently to examine its potential as a facilitator of students’ professional and academic development. The data was collected using an ethnographical approach, resulting in a collection of 21 video-recorded oral presentations, together with other relevant semiotic resources. The data is analysed by the employment of concepts from nexus analysis and the notion of communicative projects. Through a discourse analytical approach to social action in interaction, the analysis shows how role shifts are constructed of patterns of smaller actions that add up to three primary actions: setting the scene, changing perspective, and performing the new role. These primary actions are multimodally chained together, and the results demonstrate how social actors use instructional texts in combination with multimodal recourses in order to perform their role shifts.