bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robustification of the k-means clustering problem and tailored decomposition methods: when more conservative means more accurate
Authors: Burgard Jan Pablo , Moreira Costa Carina , Schmidt Martin 
Published: July 2022

Abstractk-means clustering is a classic method of unsupervised learning with the aim of partitioning a given number of measurements into k clusters. In many modern applications, however, this approach suffers from unstructured measurement errors because the k-means clustering result then represents a clustering of the erroneous measurements instead of retrieving the true underlying clustering structure. We resolve this issue by applying techniques from robust optimization to hedge the clustering result against unstructured errors in the observed data. To this end, we derive the strictly and $$\Gamma $$
Γ
-robust counterparts of the k-means clustering problem. Since the nominal problem is already NP-hard, global approaches are often not feasible in practice. As a remedy, we develop tailored alternating direction methods by decomposing the search space of the nominal as well as of the robustified problems to quickly obtain feasible points of good quality. Our numerical results reveal an interesting feature: the less conservative $$\Gamma $$
Γ
-approach is clearly outperformed by the strictly robust clustering method. In particular, the strictly robustified clustering method is able to recover clusterings of the original data even if only erroneous measurements are observed.
Level-dependent effects of predation stress on prey development, lifespan and reproduction in mites
Authors: Wei Xiaoying , Zhang Zhi-Qiang 
Published: July 2022

AbstractIn predator–prey interactions, non-consumptive effects of predators have been less studied than consumptive effects. However, non-consumptive effects may have significant influences on prey and can change different aspects of their life history such as development, reproduction and lifespan. The odour and other cues associated with a predator, without direct contact, could induce stress in prey, leading to phenotypic changes in life history traits. In this study, we investigate how mild and strong predator-induced stress could affect prey life history. The prey (Tyrophagus putrescentiae) was exposed, from hatching to death, to three different levels of predation stress from its predator (Neoseiulus cucumeris) (1, 3 or 5 predator adults in an adjacent cage separated by a mesh screen). Compared with the control, both males and females under predator-induced stress had longer developmental time and shorter lifespan when the level of predation stress increased, showing significant level-dependence. In addition, females had reduced fecundity under predation stress. Sex-specific response to predation stress was observed under a low level of predation stress: females had greater reduction in lifespan than males. Furthermore, the reduction in female lifespan was due more from the decrease in the post-oviposition period than the decrease in the oviposition period. Future studies applying even milder levels of predation press, such as exposure of prey to predator cues only during part of the prey lifespan, may provide additional insights.
Developing, Validating, and Applying a Measure of Human Quality Treatment
Authors: McGhee Peter , Haar Jarrod , Ogunyemi Kemi , Grant Patricia 
Published: July 2022

AbstractHuman Quality Treatment (HQT) is a theoretical approach expressing different ways of dealing with employees within an organization and is embedded in humanistic management tenants of dignity, care, and personal development, seeking to produce morally excellent employees. We build on the theoretical exposition and present a measure of HQT-Scale across several studies including cross-culturally to enhance confidence in our results. Our first study generates the 25 items for the HQT-Scale and provides initial support for the items. We then followed up with a large study of managers (n = 363) from Nigeria in study 2, which confirms the theoretical properties of the five dimensions of HQT and highlights a two-factor construct: HQT Ethically Unacceptable and HQT Ethically Acceptable using a 20-item HQT-Scale. Study 3 with a large sample of New Zealand employees (n = 452) again confirms the nature of the construct and provides construct validity tests. Finally, using time-lagged data, study 4 (n = 308) focuses on New Zealand employees and job attitudes and behaviors, and a well-being outcome. That study not only confirms the theoretically implied effects but also shows the HQT Ethically Acceptable factor mediates the detrimental effects of HQT Ethically Unacceptable. Overall, our four studies provide strong support for the HQT-Scale and highlight important understandings of HQT and humanistic management in the workplace.
The gut microbiome, immune check point inhibition and immune-related adverse events in non-small cell lung cancer
Authors: Bredin Philip , Naidoo Jarushka 
Published: July 2022

AbstractSystemic treatment options for patients with lung cancer have expanded in recent years, with a number of immunotherapeutic strategies now in our treatment armamentarium. Toxicity of and resistance to treatment hold a major stake in lung cancer morbidity and mortality. Herein, we summarise the background, current evidence and potential mechanisms underlying the role of the commensal gut microbiota in immunotherapy outcomes such as response and toxicity in patients with non-small cell lung cancer (NSCLC).
Developed applicability of a bacterial cellulose matrix as a gelling substitute for plant tissue culture media
Authors: Ammar Gamal A. G. , Saleh Ahmed K. , Taha Tarek H. , El-Zawawy Waleed K. , Abdel-Fattah Yasser R. 
Published: July 2022

AbstractBacterial cellulose (BC) is a natural biodegradable, eco-friendly fiber, lying within the nanoscale range. It is reputable for its various physical and chemical qualities, like high hydrophilicity, immense crystallinity, ease of sterility, being toxin-free, and extremely pure. Adding to its wide applicability in different fields, this study evaluated the applicability of a developed gelling substitute for plant tissue culture media. The BC matrix was characterized under the acronym PLATIBACGEL (PLAnt TIssue Culture BActerial Cellulose GEL), formed by Komagataeibacter hansenii AS.5, preisolated from rotten apple waste. Scanning electron microscope, Fourier-transform infrared, X-ray diffractometer, and tensile strength analyses confirmed the formation of purified, porous, and heterogeneous densely packed multiple network polymers possessing cellulose properties. The water holding capacity (WHC) values of wet and dried BC membranes were 9179% and 226.9%, respectively, and the water absorption rate (WAR) of dry BC membranes was higher than that of wet membranes. Using BC as a tissue culture gelling agent, six genotypes from tomato and wheat seeds were cultured in vitro, for guaranteeing explant genetic diversity, over seven treatments. Treatment 5, included PLATIBACGEL as the main constituent, improved and sustained all in vitro seed germination, root penetration, and plant support. Likewise, repeated tomato micropropagation subcultures were successful. Results demonstrated applying PLATIBACGEL as a promising, reusable, cheap, and reliable alternative plant micropropagation media gelling agent. Wherefore, plant cellular developers and tissue-culturists can utilize bio-polymers like BC for better understanding plant cell response to different in vitro culturing conditions, with expected beneficial returns on gelling agents industry and markets as well.
Graphical abstract
Acute effects of caffeine and glucose intake on retinal vessel calibres in healthy volunteers
Authors: Gin Thomas J. , Ali Noha , Gnanasekaran Sivashanth , Hodgson Lauren A. B. , Lim Lyndell L. , Sandhu Sukhpal S. , Wickremasinghe Sanjeewa S. 
Published: July 2022

Abstract
Purpose
To evaluate the acute effects of caffeine and glucose intake on retinal vascular calibre of healthy adults.

Methods
This prospective crossover study was conducted at the Centre for Eye Research Australia (Melbourne, Australia). Standardized doses of 300 mg caffeine (approximately 3 cups coffee), 30 g glucose or 300 ml of water, were each given to 19 healthy subjects on separate days. Retinal photographs and blood pressure measurements were taken at baseline, 30-, 60- and 120-min after ingestion of each solution. Central retinal artery and vein equivalents (CRAE, CRVE) and the arterio-venule ratio were measured using computer-assisted software. The mean retinal vascular calibre measurements were compared between pre- and post-ingestion images.

Results
After caffeine intake, significant reductions were observed in mean CRAE of − 9.3 μm, − 10.4 μm and − 8.5 μm and CRVE of − 16.9 μm, − 18.7 μm and − 16.1 μm at 30-, 60- and 120-min after intake when compared with baseline (p ≤ 0.002 for all; paired t test). No significant changes were observed in mean retinal vascular calibre measurements after intake of either glucose or water when compared to baseline (p ≥ 0.072 for all). When controlling for baseline characteristics and blood pressure measurements, only caffeine intake had a significant effect on reducing both CRAE and CRVE at all time points post ingestion (p ≤ 0.003 for all, multiple linear regression model).

Conclusion
Caffeine is associated with an acute vasoconstrictive effect on retinal arterioles and venules in healthy subjects. Factors other than blood pressure-induced autoregulation play a significant role in caffeine-associated retinal vasoconstriction.
Enhanced Flux Pinning Performance of Bulk MgB2 via Immersion of Synthetic Motor Oil
Authors: Santosh M. , Sai Srikanth A. , Muralidhar M. 
Published: July 2022

AbstractThe present investigation focuses on the incorporation of synthetic motor oil as an inexpensive, rich carbon source in bulk MgB2 superconductor and its effect on superconducting and flux pinning properties. A set of three MgB2 bulk samples were prepared from commercial high-purity powders of Mg metal and amorphous B powder utilizing a conventional in situ solid-state reaction process. Before sintering, the MgB2 samples were immersed in used and new synthetic motor oil for a standby time of 30 min and sintered in pure Ar atmosphere at 775 °C for 3 h. X-ray powder diffractometer (XRD) analysis confirmed that single-phase formation of MgB2 with a small shift in X-ray diffraction peaks especially at (110) towards the peak position due to the effect of carbon substitution into the boron sites in lattice for samples immersed in new and used synthetic oil. The magnetization measurements indicated the Tc (onset) value to somewhat decrease to 37.5 K as a result of carbon doping. Microstructural observations with scanning electron microscopy (SEM) suggested that fine nano-sized MgB2 grains improved self-field critical current density around 3.8 × 105 A/cm2 at 20 K for all samples studied. Further, the high-field critical current density (Jc) was improved especially for the sample immersed in used synthetic motor oil with the value of 2.7 × 104 A/cm2, 6 × 103 A/cm2 at 20 K, and at 3 T and 4 T, which is higher as compared to pure-MgB2 sample. In essence, the results signify that the bulk MgB2 samples immersed with used synthetic motor oil would improve the bulk performance at high magnetic fields indicating to be a viable option for industrial applications.
On product-one sequences over subsets of groups
Authors: Fadinger Victor , Zhong Qinghai 
Published: July 2022

AbstractLet G be a group and $$G_0 \subseteq G$$

G
0

⊆
G

be a subset. A sequence over $$G_0$$

G
0

means a finite sequence of terms from $$G_0$$

G
0

, where the order of elements is disregarded and the repetition of elements is allowed. A product-one sequence is a sequence whose elements can be ordered such that their product equals the identity element of the group. We study algebraic and arithmetic properties of monoids of product-one sequences over finite subsets of G and over the whole group G, with a special emphasis on the infinite dihedral group.
Second-order relations and nomic regularities
Authors: Friend Toby 
Published: July 2022

AbstractBird’s Ultimate Argument sought to show that Armstrong’s N relationships involving categorical universals can’t entail nomic regularities. In N’s place Bird offered the non-categorical SR relation. Two kinds of objection have been raised: either Bird’s own alternative metaphysics fails in just the same way as Armstrong’s or the target of Bird’s argument may anyway have a way out of the problem. My aim is to reclaim the victory for Bird. I argue that the responses in defence of Armstong’s N relationships fail to acknowledge that Bird was explicitly concerned with Armstrong’s commitment to a categoricalist view of universals. Moreover, Bird’s alternative account does not suffer the same problem since his metaphysics of properties is essentialist. Nevertheless, Bird’s account does need elaborating on to explainwhySR relationships entail their regularities. I offer Schaffer’s Axiomatic Solution as a candidate for this purpose.
The identification game: deepfakes and the epistemic limits of identity
Authors: Öhman Carl 
Published: July 2022

AbstractThe fast development of synthetic media, commonly known as deepfakes, has cast new light on an old problem, namely—to what extent do people have a moral claim to their likeness, including personally distinguishing features such as their voice or face? That people have at least some such claim seems uncontroversial. In fact, several jurisdictions already combat deepfakes by appealing to a “right to identity.” Yet, an individual’s disapproval of appearing in a piece of synthetic media is sensible only insofar as the replication is successful. There has to be some form of (qualitative) identity between the content and the natural person. The question, therefore, is how this identity can be established. How can we know whether the face or voice featured in a piece of synthetic content belongs to a person who makes claim to it? On a trivial level, this may seem an easy task—the person in the video is A insofar as he or she is recognised as being A. Providing more rigorous criteria, however, poses a serious challenge. In this paper, I draw on Turing’s imitation game, and Floridi’s method of levels of abstraction, to propose a heuristic to this end. I call it the identification game. Using this heuristic, I show that identity cannot be established independently of the purpose of the inquiry. More specifically, I argue that whether a person has a moral claim to content that allegedly uses their identity depends on the type of harm under consideration.
Molecular signatures of organic particulates as tracers of emission sources
Authors: Cecinato Angelo , Bacaloni Alessandro , Romagnoli Paola , Perilli Mattia , Balducci Catia 
Published: July 2022

AbstractChemical signature of airborne particulates and deposition dusts is subject of study since decades. Usually, three complementary composition markers are investigated, namely, (i) specific organic compounds; (ii) concentration ratios between congeners, and (iii) percent distributions of homologs. Due to its intrinsic limits (e.g., variability depending on decomposition and gas/particle equilibrium), the identification of pollution sources based on molecular signatures results overall restricted to qualitative purposes. Nevertheless, chemical fingerprints allow drawing preliminary information, suitable for successfully approaching multivariate analysis and valuing the relative importance of sources. Here, the state-of-the-art is presented about the molecular fingerprints of non-polar aliphatic, polyaromatic (PAHs, nitro-PAHs), and polar (fatty acids, organic halides, polysaccharides) compounds in emissions. Special concern was addressed to alkenes and alkanes with carbon numbers ranging from 12 to 23 and ≥ 24, which displayed distinct relative abundances in petrol-derived spills and exhausts, emissions from microorganisms, high vegetation, and sediments. Long-chain alkanes associated with tobacco smoke were characterized by a peculiar iso/anteiso/normal homolog fingerprint and by n-hentriacontane percentages higher than elsewhere. Several concentration ratios of PAHs were identified as diagnostic of the type of emission, and the sources of uncertainty were elucidated. Despite extensive investigations conducted so far, the origin of uncommon molecular fingerprints, e.g., alkane/alkene relationships in deposition dusts and airborne particles, remains quite unclear. Polar organics resulted scarcely investigated for pollution apportioning purposes, though they looked as indicative of the nature of sources. Finally, the role of humans and living organisms as actual emitters of chemicals seems to need concern in the future.
Health Service Use for Mental Health Reasons in a Cohort of People Who Use Methamphetamine Experiencing Moderate to Severe Anxiety or Depression
Authors: Duncan Zoe , Kippen Rebecca , Sutton Keith , Ward Bernadette , Quinn Brendan , Dietze Paul 
Published: July 2022

Abstract
This study examined health service use for mental health reasons in a cohort of people who use methamphetamine and experience anxiety or depression. Data were derived from baseline surveys of a subset of 429 participants from the ‘VMAX’ study. Anxiety and depression were measured using the Generalized Anxiety Disorder-7 instruments and the Patient Health Questionnaire-9. Sequential logistic regression determined correlates of health service use for mental health reasons. Lower odds of health service use for mental health reasons were evident for those living in a medium/small rural town (aOR = 0.27, CI = 0.12, 0.62), ≥ weekly methamphetamine use (aOR = 0.51, CI = 0.27, 0.99), and not utilising professional support for methamphetamine use in the 12 months prior (aOR = 0.19, CI = 0.12, 0.30). People who use methamphetamine frequently use health services for mental health issues. Further work is needed to determine the effectiveness of these services for this population.
Does a gender pay gap exist on executive boards? An empirical multilevel analysis of executive board compensation in German listed companies
Authors: Handschumacher-Knors Franziska 
Published: July 2022

AbstractUsing a three-stage multilevel model, this paper investigates whether the compensation of female and male members of top management teams differs systematically. For this, the payment and the determinants of compensation of approximately 600 executive board members of German DAX, MDAX, and SDAX companies in the years 2016–2019 were analysed. The differences in remuneration are theoretically founded at the company level by agency theory and at the individual level by human capital theory. The empirical results show that women receive lower compensation than men on average throughout the period under review. However, these differences in pay are especially attributable to the fact that women serve on average for a shorter period on the executive board and rarely hold the CEO position. There is also evidence that executive compensation depends directly on individual attributes (length of service on and position in the board) and company-specific characteristics (firm size and performance) that differ systematically between men and women, but gender determines compensation only indirectly through these factors. The study also confirms that women are still underrepresented on executive boards. With these results, this paper contributes to corporate governance research in the context of the dualistic board system and encourages the discussion about women in leadership positions.
Predicting axillary lymph node metastasis in breast cancer using the similarity of quantitative dual-energy CT parameters between the primary lesion and axillary lymph node
Authors: Terada Kanako , Kawashima Hiroko , Yoneda Norihide , Toshima Fumihito , Hirata Miki , Kobayashi Satoshi , Gabata Toshifumi 
Published: July 2022

Abstract
Purpose
To evaluate the similarity of quantitative dual-energy computed tomography (DECT) parameters between the primary breast cancer lesion and axillary lymph node (LN) for predicting LN metastasis.

Materials and methods
This retrospective study included patients with breast cancer who underwent contrast-enhanced DECT between July 2019 and April 2021. Relationships between LN metastasis and simple DECT parameters, similarity of DECT parameters, and pathological and morphological features were analyzed. ROC curve analysis was used to evaluate diagnostic ability.

Results
Overall, 137 LNs (39 metastases and 98 non-metastases) were evaluated. Significant differences were observed in some pathological (nuclear grade, estrogen receptor status, and Ki67 index) and morphological characteristics (shortest and longest diameters of the LN, longest-to-shortest diameter ratio, and hilum), most simple DECT parameters, and all DECT similarity parameters between the LN metastasis and non-metastasis groups (all, P < 0.001–0.004). The shortest diameter of the LN (odds ratio 2.22; 95% confidence interval 1.47, 3.35; P < 0.001) and the similarity parameter of 40-keV attenuation (odds ratio, 2.00; 95% confidence interval 1.13, 3.53; P = 0.017) were independently associated with LN metastasis compared to simple DECT parameters of 40-keV attenuation (odds ratio 1.01; 95% confidence interval 0.99, 1.03; P =0.35). The AUC value of the similarity parameters for predicting metastatic LN was 0.78–0.81, even in cohorts with small LNs (shortest diameter < 5 mm) (AUC value 0.73–0.78).

Conclusion
The similarity of the delayed-phase DECT parameters could be a more useful tool for predicting LN metastasis than simple DECT parameters in breast cancer, regardless of LN size.
Investigating the Dimensional Accuracy and Surface Roughness for 3D Printed Parts Using a Multi-jet Printer
Authors: Chand Ramesh , Sharma Vishal S. , Trehan Rajeev , Gupta Munish Kumar , Sarikaya Murat 
Published: July 2022

AbstractThe shortcoming of conventional manufacturing (CM) is that it cannot manufacture geometrically complex parts with high repeatability and good surface properties. In order to overcome these shortcomings of CM, additive manufacturing (AM) is the major alternative to the CM. However, the usefulness and performance of parts manufactured through AM are closely correlated with dimensional accuracy and surface roughness, SR (Ra). Therefore, an investigation was carried out in this study for dimensional accuracy and surface roughness of 3D printed parts fabricated in different orientations. In the investigation, four orientation patterns are considered. The part is lying on the base (A), part is lying on the long edge (B), part is lying on the short edge (C), and the part is inclined to 45°(D) to the surface of the base plate (refer to Fig. 2). Orientations, i.e., A, B, C, and D, were explored for the variations in dimensional deviation and SR. In addition, an analysis was carried out using scanning electron microscopy (SEM) on fabricated parts. The results obtained exhibit a variation in dimensional accuracy and change in SR with different part orientations. Among all orientations, the largest surface area of the component in contact with the base plate (A) was the most suitable.