bluuebunny/crossref_metadata_2025_split huggingface dataset:
Designing Mixed Reality-Based Indoor Navigation for User Studies
Authors: Liu Bing , Ding Linfang , Wang Shengkai , Meng Liqiu 
Published: May 2022

AbstractMixed reality (MR) is increasingly applied in indoor navigation. With the development of MR devices and indoor navigation algorithms, special attention has been paid to related cognitive issues and many user studies are being conducted. This paper gives an overview of MR technology, devices, and the design of MR-based indoor navigation systems for user studies. We propose a theoretical framework consisting of spatial mapping, spatial localization, path generation, and instruction visualization. We summarize some critical factors to be considered in the design process. Four approaches to constructing an MR-based indoor navigation system under different conditions are introduced and compared. Our gained insight can be used to help researchers select an optimal design approach of MR-based indoor navigation for their user studies.
Bullshit in the Sustainability and Transitions Literature: a Provocation
Authors: Kirchherr Julian 
Published: May 2022

AbstractResearch on sustainability and transitions is burgeoning. Some of this research is helping to solve humankind’s most pressing problems. However, as this provocation argues, up to 50% of the articles that are now being published in many interdisciplinary sustainability and transitions journals may be categorized as “scholarly bullshit.” These are articles that typically engage with the latest sustainability and transitions buzzword (e.g., circular economy), while contributing little to none to the scholarly body of knowledge on the topic. A typology of “scholarly bullshit” is proposed which includes the following archetypes: boring question scholarship, literature review of literature reviews, recycled research, master thesis madness, and activist rants. Since “scholarly bullshit” articles engage with the latest academic buzzwords, they also tend to accumulate significant citations and are thus welcomed by many journal editors. Citations matter most in the metric-driven logic of the academic system, and this type of scholarship, sadly, is thus unlikely to decrease in the coming years.
Emotional characteristics and theme mining of star-rated hotels from the perspective of social sensing: a case study of Nanchang City, China
Authors: Wang Jingbo , Xia Yu , Wu Yuting 
Published: May 2022

AbstractMining hotel social sensing data and analyzing its spatial and temporal characteristics can provide decision support for hotel managers. Present research on this topic is limited to the overall hotel industry and text mining. Here, we first obtain POI and reviews for star-rated hotels in Nanchang from 2018 to 2021. Secondly, the hotel POI (Point of Interest) is combined with the sentiment value of customer reviews. Finally, comparative analysis and topic mining of Spatio-temporal aspects of text reviews of different star-rated hotels are conducted using sentiment analysis, spatial analysis, and thematic social network analysis. Results show that: (1) Hotel star rating and hotel review sentiment value are significantly positively correlated. The seasonal trends of different star rating hotel sentiment values are similar, but are highest in summer and lower in autumn; (2) The highest sentiment value is seen for friends’ outings and the lowest is for business trips; (3) Customer reviews of star-rated hotels focus on three aspects: facilities, service, and location. Three-star hotels focus on the stay experience, while four-star hotels focus on the breakfast situation. Exploring hotel social sensing data can intuitively illustrate hotel selection’s behavioral patterns and spatial-temporal characteristics. The methods of this study can expand the application of social sensing data in different fields, such as the tourism and restaurant industries.
Hasimoto Maps for Nonlinear Schrödinger Equations in Minkowski Space
Authors: Gürbüz Nevin Ertug , Yüzbası Zühal Küçükarslan , Yoon Dae Won 
Published: May 2022

AbstractIn this paper, we study the vortex filament flow for timelike and spacelike curves in Minkowski 3-space. The vortex filament flow equations of the timelike and the spacelike curves are equivalent to the nonlinear Schrödinger equation and the heat equation, respectively. As a consequentce, we prove that a soliton of the nonlinear Schrödinger equations of the timelike curve gives a solution of a traveling wave on a line at infinity. Also, we study a solution of a traveling wave of the nonlinear Schrödinger equations of the spacelike curve in terms of a new complex frame. Finally, we discuss the method to find the exact shape of the timelike and the spacelike curves from the vortex filament by solving the Frenet vectors of these curves and provide applications to illustrate the method.
Parametric cost estimation models of civil aircraft for the preliminary aircraft design phase
Authors: Al-Shamma O. , Ali R. 
Published: May 2022

AbstractIn the preliminary design phase of aircraft design, estimating the production cost accurately is a challenging task. At this stage, many design parameters that affect the overall cost are still undefined. This paper establishes cost-estimation models for civil, commercial aircraft using a parametric cost analysis (PCA) approach. Aircraft are characterised based on their size, ranging from a wide body to executive jets, into four categories. Key design parameters, such as maximum take-off weight, number of passengers, range, wing area, span, fuselage length, to name a few, are likely to be available in the preliminary design stage and significantly impact the aircraft design. These variables either directly or indirectly affect the overall production cost or performance. The PCA approach includes both correlation and multiple linear regression techniques. The empirical models thus developed were able to predict the aircraft cost with an error of less than ±4% for all aircraft categories considered. Two aircraft in each defined category were not part of the PCA models and were used to verify the models. The proposed models provide the ability to estimate the aircraft cost quickly in the early stages of the preliminary design phase and provide the possibility of performing parametric studies involving the key variables to determine the cost sensitivity to the main design parameters.
Almost all orbits of the Collatz map attain almost bounded values
Authors: Tao Terence 
Published: May 2022

Abstract
Define the Collatz map

${\operatorname {Col}} \colon \mathbb {N}+1 \to \mathbb {N}+1$

on the positive integers

$\mathbb {N}+1 = \{1,2,3,\dots \}$

by setting

${\operatorname {Col}}(N)$

equal to

$3N+1$

when N is odd and

$N/2$

when N is even, and let

${\operatorname {Col}}_{\min }(N) := \inf _{n \in \mathbb {N}} {\operatorname {Col}}^n(N)$

denote the minimal element of the Collatz orbit

$N, {\operatorname {Col}}(N), {\operatorname {Col}}^2(N), \dots $

. The infamous Collatz conjecture asserts that

${\operatorname {Col}}_{\min }(N)=1$

for all

$N \in \mathbb {N}+1$

. Previously, it was shown by Korec that for any

$\theta> \frac {\log 3}{\log 4} \approx 0.7924$

, one has

${\operatorname {Col}}_{\min }(N) \leq N^\theta $

for almost all

$N \in \mathbb {N}+1$

(in the sense of natural density). In this paper, we show that for any function

$f \colon \mathbb {N}+1 \to \mathbb {R}$

with

$\lim _{N \to \infty } f(N)=+\infty $

, one has

${\operatorname {Col}}_{\min }(N) \leq f(N)$

for almost all

$N \in \mathbb {N}+1$

(in the sense of logarithmic density). Our proof proceeds by establishing a stabilisation property for a certain first passage random variable associated with the Collatz iteration (or more precisely, the closely related Syracuse iteration), which in turn follows from estimation of the characteristic function of a certain skew random walk on a

$3$

-adic cyclic group

$\mathbb {Z}/3^n\mathbb {Z}$

at high frequencies. This estimation is achieved by studying how a certain two-dimensional renewal process interacts with a union of triangles associated to a given frequency.
Assessing the success of the first cheetah reintroduction in Malawi
Authors: Sievert Olivia , Fattebert Julien , Marnewick Kelly , Leslie Alison 
Published: May 2022

AbstractIn an effort to restore parts of their historical geographical range, and in recognition of their ability to restore ecosystem functioning and of the financial benefits they can provide through ecotourism, large carnivores have been reintroduced in many protected areas from which they were previously extirpated. Similar to dispersing animals, translocated individuals often undertake long-distance exploratory movements before establishing home ranges. Post-release monitoring of reintroduced carnivores is common, but the mechanisms of population establishment are rarely examined, limiting our understanding of reintroduction success. We monitored survival and post-release movements of seven cheetahs Acinonyx jubatus reintroduced to Liwonde National Park, Malawi, to evaluate early population establishment. Exploratory phases post-release lasted 29–174 days. Duration of pre-release holding periods in the boma had no significant effect on daily distance moved. Males travelled significantly farther and established home ranges later than females. All cheetahs showed release site fidelity and all females birthed their first litter within 4 months of release. Within 2 years of reintroduction, the newly established population consisted of 14 cheetahs, with demographic attributes similar to those recorded in the source populations. Based on individual settlement, survival and reproduction rates, we deemed this reintroduction successful in re-establishing a breeding population of cheetahs in Liwonde. Our findings suggest the drivers of settlement and population establishment for reintroduced cheetahs are complex, highlighting the importance of assessing and reporting post-release monitoring data.
Global distribution of Echinococcus granulosus genotypes in domestic and wild canids: a systematic review and meta-analysis
Authors: Shams Morteza , Khazaei Sasan , Naserifar Razi , Shariatzadeh Seyyed Ali , Anvari Davood , Montazeri Fattaneh , Pirestani Majid , Majidiani Hamidreza 
Published: May 2022

AbstractThe current systematic review and meta-analysis demonstrate the genotypic distribution of canine echinococcosis worldwide. Studies published from the inception until 21 May 2021 were screened, relevant articles were selected and the random-effect model was used to draw forest plots with 95% confidence intervals (CIs). Totally, 44 articles were included, mostly examined dogs (37 records), followed by wolf (8 records), jackal (7 records), fox (3 records), pump fox (3 records) and coyote (1 record). Echinococcus granulosus sensu stricto (G1–G3) and G6/7 cluster of Echinococcus canadensis were the most common genotypes among canids. Most studies were conducted in Asia and Europe with 17 and 15 datasets, respectively. Exclusively, Iran possessed the highest number of studies (10 records). Meta-analysis showed that the pooled molecular prevalence of echinococcosis was 33.82% (95% CI 24.50–43.83%). Also, the highest and lowest prevalence of canine echinococcosis was calculated for South America (66.03%; 95% CI 25.67–95.85%) and Europe (19.01%; 95% CI 9.95–30.16%). Additionally, there were statistically significant differences between the global prevalence of echinococcosis in canines and publication year, continent, country, sample type, host and molecular test. These findings will elevate our knowledge on the poorly known canine echinococcosis worldwide.
Investigation of atrial mass by multi-imaging and biopsy
Authors: Mingas Odete R. , Rebelo Mónica , Duarte Ximo , Anjos Rui 
Published: May 2022

AbstractThe authors describe the case of a child with a history of relapsed acute lymphoblastic leukaemia with a giant intra-auricular lymphomatous mass, submitted to investigation by multiple imaging methods and biopsy.
The Response by International Emergency Medical Teams Following the Beirut Harbor Explosion in 2020 – Who Were They, When Did They Arrive, What Did They Do, and Were They Needed?
Authors: Wolff Emeli , Shankiti Iman , Salio Flavio , von Schreeb Johan 
Published: May 2022

AbstractIntroduction:On August 4, 2020, a massive explosion struck the Beirut Harbor in Lebanon. Approximately 220 people were killed and around 7,000 were injured, of which 12% were hospitalized. Despite being weakened by economic crisis and increasing numbers of coronavirus disease 2019 (COVID-19) cases, the national health care system responded promptly. Within a day, international health care assistance in the form of International Emergency Medical Teams (I-EMTs) started arriving. Previous studies have found that I-EMTs have arrived late and have not been adapted to the context and dominating health care needs. The aim of this study was to document the organization, type, activity, and timing of I-EMTs deployed to Beirut and to discuss their relevance in relation to medical needs.Methods:Data on all deployed I-EMTs were retrieved from all available sources, including internet searches, I-EMT contacts, and from the World Health Organization (WHO) EMT coordination cell (EMT CC) in Lebanon. The WHO EMT classification was used to categorize deployed teams. Information on characteristics, timing, and activities was retrieved and systematically assessed.Results:Nine I-EMTs were deployed to Beirut following the explosion. Five were equivalent to EMT Type 2 (field hospitals), out of which three were military. The first EMT Type 2 arrived within 24 hours, while the last EMT set up one month after the explosion. Four civilian I-EMTs provided non-clinical support as EMT Specialized Care Teams. A majority of the I-EMTs were focused on trauma care. Three of the four I-EMT Specialized Care Teams were rapidly re-tasked to support COVID-19 care in public hospitals.Conclusion:A majority of the deployed I-EMT Type 2 were military and focused on trauma care rather than the normal burden of disease including COVID-19. Re-tasking of EMTs requires flexible EMTs. To be better adapted, the I-EMT response should be guided by a systematic assessment of both health care capacities in the affected country as well as the varying health effects of hazards before deployment.
Word order preference in sign influences speech in hearing bimodal bilinguals but not vice versa: Evidence from behavior and eye-gaze
Authors: Manhardt Francie , Brouwer Susanne , van Wijk Eveline , Özyürek Aslı 
Published: May 2022

AbstractWe investigated cross-modal influences between speech and sign in hearing bimodal bilinguals, proficient in a spoken and a sign language, and its consequences on visual attention during message preparation using eye-tracking. We focused on spatial expressions in which sign languages, unlike spoken languages, have a modality-driven preference to mention grounds (big objects) prior to figures (smaller objects). We compared hearing bimodal bilinguals’ spatial expressions and visual attention in Dutch and Dutch Sign Language (N = 18) to those of their hearing non-signing (N= 20) and deaf signing peers (N= 18). In speech, hearing bimodal bilinguals expressed more ground-first descriptions and fixated grounds more than hearing non-signers, showing influence from sign. In sign, they used as many ground-first descriptions as deaf signers and fixated grounds equally often, demonstrating no influence from speech. Cross-linguistic influence of word order preference and visual attention in hearing bimodal bilinguals appears to be one-directional modulated by modality-driven differences.
Biological Evaluation of a Series of Amine-Containing Mixed-Ligand Copper(II) Coordination Compounds with 2-(2-hydroxybenzylidene)-N-(prop-2-en-1-yl)hydrazinecarbothioamide
Authors: Gulea Aurelian , Toderas Ion , Garbuz Olga , Ulchina Ianina , Graur Vasilii , Railean Nadejda 
Published: May 2022

Abstract
Five compounds 2-(2-hydroxybenzylidene)-N-(prop-2-en-1-yl)hydrazinecarbothioamide (H2L), bis[μ2-2-({2-[(prop-2-en-1-yl)carbamothioyl]hydrazinylidene}methyl)phenolato-S,N,O:O]diaquadicopper(II) nitrate (1), bis[μ2-2-({2-[(prop-2-en-1-yl)carbamothioyl]hydrazinylidene}methyl)phenolato-S,N,O:O]diimidazoldicopper(II) nitrate (2), bis[μ2-2-({2-[(prop-2-en-1-yl)carbamothioyl]-hydrazinylidene}methyl)phenolato-S,N,O:O]bis-(3,5-dibromopyridine)dicopper(II) nitrate (3), bis[μ2-2-({2-[(prop-2-en-1-yl)carbamothioyl]-hydrazinylidene}methyl)phenolato-S,N,O:O]bis(4-methylpyridine)dicopper(II) nitrate hexahydrate (4) were synthesized. The antiproliferative properties of these compounds toward cancer cell lines RD, HeLa, and normal cell line MDCK have been investigated. The tested complexes surpass Doxorubicin (DOXO) in the efficiency of anticancer activity as their IC50 values toward cancer cells are lower than the corresponding values of DOXO and the selectivity indexes exceed the corresponding SI value of DOXO. The tested compounds demonstrated a high antioxidant effect against ABTS•+ radical cations as well as low toxicity on Daphnia magna.
The Earth’s Outer Exospheric Density Distributions Derived From PROCYON/LAICA UV Observations
Authors: Cucho‐Padin Gonzalo , Kameda Shingo , Sibeck David G. 
Published: May 2022

AbstractCurrent three‐dimensional, data‐based models for the terrestrial exosphere have been derived from measurements of optically thin Lyman‐alpha (Ly‐α) emissions scattered by neutral hydrogen atoms. Such models are only valid for the middle exospheric region (3–8 Earth radii geocentric distances) since the orbital paths of the space‐based platforms used to acquire Ly‐α radiance were located within the exosphere, thus precluding the proper detection of the faint outer exospheric emission. Notwithstanding, accurate specifications of density distributions beyond 8 RE are needed to support comprehensive studies of the solar‐terrestrial interactions. Two upcoming missions, the Solar wind Magnetosphere‐Ionosphere Link Explorer and the Lunar Environment Heliospheric X‐ray Imager, will image the Earth’s magnetosheath in soft X‐rays, and neutral densities are crucial to extract ion distributions through inversion of the acquired images. This work develops a technique to estimate the Earth’s outer exospheric density distributions using far‐ultraviolet wide‐field data acquired by the Lyman‐Alpha Imaging Camera (LAICA) onboard the Proximate Object Close Flyby with Optical Navigation mission. Our approach formulates an inverse problem based on the linearity between measurements of scattered Ly‐α flux and the local atomic hydrogen density, which is solved using the Bayesian approach known as Maximum a posteriori estimation. We use the LAICA image to derive global, 3‐D hydrogen density distributions at 6–20 RE geocentric distances. We find that the spatial structure of the outer exosphere agrees well with the predictions of radiation pressure theory. Further, we find that the hydrogen density at the 10 RE subsolar point is 26.51 atoms/cm3.
Spatiotemporal Variability of Earthquake Source Parameters at Parkfield, California, and Their Relationship With the 2004 M6 Earthquake
Authors: Zhang Jiewen , Chen Xiaowei , Abercrombie Rachel E. 
Published: May 2022

AbstractEarthquake stress drop is an important source parameter that directly links to strong ground motion and fundamental questions in earthquake physics. Stress drop estimations may contain significant uncertainties due to such factors as variations in material properties and data limitations, which limit the applications of stress drop interpretations. Using a high‐resolution borehole network, we estimate stress drop for 4551 (M0‐4) earthquakes on the San Andreas Fault at Parkfield, California, between 2001 and 2016 using spectral decomposition and an improved stacking method. To evaluate the influence of spatiotemporal variations of material properties on stress drop estimations, we apply different strategies to account for spatial variations of velocity and attenuation changes, and divide earthquakes into three separate time periods to correct temporal variations of attenuation. These results show that appropriate corrections can significantly reduce the scatter in stress drop estimates, and decrease apparent depth and magnitude dependence. We find that insufficient bandwidth can cause systematic underestimation of stress drop estimates and increased scatter. The stress drop measurements from the high‐frequency borehole recordings exhibit complex stable spatial patterns with no clear correlation with the nature of fault slip, or the slip distribution of the 2004 M6 earthquake. Temporal variations are significantly smaller, less well resolved and varying spatially. They do not affect the long‐term stress drop spatial variations, suggesting local material properties may control the spatial heterogeneity of stress drop.
Theranostic of orthotopic gliomas by core-shell structured nanoplatforms
Authors: Carlos Luís D. 
Published: May 2022

AbstractSmart designed core-shell nanostructures formed by a YVO4: Nd3+ nanoparticle as the core, the sonosensitizer hematoporphyrinmonomethyl ether as the carrier, and MnO2 nanosheets as the shell demonstrate bimodal imaging and highly efficient sonodynamic therapy of orthotopic gliomas.
Structural insights into the activation of somatostatin receptor 2 by cyclic SST analogues
Authors: Bo Qing , Yang Fan , Li Yingge , Meng Xianyu , Zhang Huanhuan , Zhou Yingxin , Ling Shenglong , Sun Demeng , Lv Pei , Liu Lei , Shi Pan , Tian Changlin 
Published: May 2022

AbstractThe endogenous cyclic tetradecapeptide SST14 was reported to stimulate all five somatostatin receptors (SSTR1–5) for hormone release, neurotransmission, cell growth arrest and cancer suppression. Two SST14-derived short cyclic SST analogues (lanreotide or octreotide) with improved stability and longer lifetime were developed as drugs to preferentially activate SSTR2 and treat acromegalia and neuroendocrine tumors. Here, cryo-EM structures of the human SSTR2–Gi complex bound with SST14, octreotide or lanreotide were determined at resolutions of 2.85 Å, 2.97 Å, and 2.87 Å, respectively. Structural and functional analysis revealed that interactions between β-turn residues in SST analogues and transmembrane SSTR2 residues in the ligand-binding pocket are crucial for receptor binding and functional stimulation of the two SST14-derived cyclic octapeptides. Additionally, Q1022.63, N2766.55, and F2947.35 could be responsible for the selectivity of lanreotide or octreotide for SSTR2 over SSTR1 or SSTR4. These results provide valuable insights into further rational development of SST analogue drugs targeting SSTR2.
Limiting motorboat noise on coral reefs boosts fish reproductive success
Authors: Nedelec Sophie L. , Radford Andrew N. , Gatenby Peter , Davidson Isla Keesje , Velasquez Jimenez Laura , Travis Maggie , Chapman Katherine E. , McCloskey Kieran P. , Lamont Timothy A. C. , Illing Björn , McCormick Mark I. , Simpson Stephen D. 
Published: May 2022

AbstractAnthropogenic noise impacts are pervasive across taxa, ecosystems and the world. Here, we experimentally test the hypothesis that protecting vulnerable habitats from noise pollution can improve animal reproductive success. Using a season-long field manipulation with an established model system on the Great Barrier Reef, we demonstrate that limiting motorboat activity on reefs leads to the survival of more fish offspring compared to reefs experiencing busy motorboat traffic. A complementary laboratory experiment isolated the importance of noise and, in combination with the field study, showed that the enhanced reproductive success on protected reefs is likely due to improvements in parental care and offspring length. Our results suggest noise mitigation could have benefits that carry through to the population-level by increasing adult reproductive output and offspring growth, thus helping to protect coral reefs from human impacts and presenting a valuable opportunity for enhancing ecosystem resilience.