Miracle-dz/UniFAR-FTUs huggingface dataset:
From General to Situational Privacy Concerns: A New Mechanism to Explain Information Disclosure in Social Networks

: Today, people spend many hours each day on social networking activities, through which they share a great deal of information with others. Prior research has shown that unlike many other online contexts (e.g., e-commerce), users of social networking sites (SNSs) tend to share their personal information almost irrespective of their concerns for information privacy (CFIP). It has raised the question that do people really care for their privacy in SNSs? In this study, by developing a new conceptual model, based on privacy calculus theory, and testing it using a scenario-based survey (N=180), we discuss that the inconsistency reported in the literature (i.e., information sharing in SNSs in the presence of CFIP) is mainly due to lack of proper conceptualization and operationalization of models in those studies. Our results show that prior research widely lacks parallelism between the operationalization levels of CFIP and willingness to share information. Moreover, we show that situational factors such as sensitivity of information and perceived control over privacy play a critical role in explaining the decision-making mechanism for information disclosure in SNSs.
Communications of the Association for Information Systems Communications of the Association for Information Systems

: In this study, we investigate the relationship between the occupational culture of information technology (IT) personnel and knowledge sharing in organizations. We suggest that some elements of IT occupational culture affect knowledge sharing among IT personnel and business end users. Drawing on cultural psychology, we present one possible approach through which IT occupational culture manifests through six elements of organizational structure (i.e., stories, symbols, power structures, control systems, and rituals and routines) and affects the knowledge-sharing process. In doing so, we better understand behaviors related to knowledge sharing and IT diffusion in organizations beyond the limitations of previous IT-diffusion studies.
Communications of the Association for Information Systems Communications of the Association for Information Systems

: The Internet of things (IoT) is emerging as an integrated set of digital innovations with the potential to unleash unprecedented opportunities and create significant challenges from both technological and societal perspectives. The IoT’s emergence signals many valuable opportunities (particularly for information systems (IS) scholars) to conduct scholarly inquiries. We posit that, since the IS discipline operates at the intersection of information technologies’ (IT) social, business, and technical aspects, IS scholars have a unique capacity to understand and contribute to advancing research on this new topic and associated phenomena. We outline the IoT’s distinctive attributes and their implications for existing IS research traditions. Furthermore, we highlight some illustrative research perspectives from which IS scholars can study the IoT. We highlight a research agenda for IS in two different ways. First, we discuss four IS characteristics that change based on IoT elements: 1) the physio-digital continuum, 2) multi-level exploration of IS, 3) composite affordance, and 4) heterogeneity. Second, we discuss the ways in which the IoT opens up research opportunities based on its impact on four major thematic domains: 1) organizations, 2), technology, 3) individuals, and 4) society.
Soil respiration across three contrasting ecosystem types:comparison of two portable IRGA systems

An accurate assessment of soil respiration is critical for understanding and predicting ecosystem responses to anthropogenic perturbation such as climate change, pollution, and agriculture. Infra-red gas analyzer (IRGA)–based field measurement is the most widely used technique for assessing soil-respiration flux rates. In this study, respiration rates obtained with two common IRGA systems (LI-COR 8100 and PP Systems EGM-4) were compared across three ecosystem types. Our results showed that both methods were highly comparable in their flux estimates, but the associated methodology used (notably the use or absence of a soil collar) resulted in greater uncertainty in flux rates and a greater degree of intrasite variation. Specifically, the use of collars significantly decreased the flux estimate for both IRGAs compared to the no-collar estimate. The disturbance caused by collar insertion was assumed to be a major factor in causing the differing flux estimates, with root and mycorrhizal severance likely being the main contributor. We conclude that the two IRGAs used in this study can be reliably compared for overall flux estimates but emphasis is needed to validate a common measurement methodology.
Synthesis and characterization of versatile MgO–ZrO2 mixed metal oxide nanoparticles and their applications

A heterogeneous, versatile nano-magnesia-zirconia or MgO–ZrO2 (MZ) catalyst was prepared by an ultra dilution method. The as-synthesised catalyst was characterized by several analytical techniques such as XRD, particle size analysis, BET surface area, thermogravimetric analysis (TGA), differential thermal analysis (DTA), FT-IR spectroscopy, SEM (scanning electron microscope), TEM (transmission electron microscope) and XPS (X-ray fluorescence spectroscopy). The surface area is found to be 268 m2 g−1. The catalytic activity of MZ was tested for various important organic reactions such as cross-aldol condensation, N-benzyloxycarbonylation of amines, reduction of aromatic nitrocompounds, and synthesis of 1,5-benzodiazepines. It has been observed that for all reactions MZ shows a good catalytic activity. All corresponding products were obtained in good to excellent yield under mild conditions. The MgO-ZrO2 catalyst can be prepared from inexpensive precursors, has high surface area, and is reusable and recyclable for all reactions.
Influence of sources and meteorology on surface concentrations of gases and aerosols in a coastal industrial complex

Industrial emissions are a notorious source of atmospheric pollution in the Cubatao industrial park of Southern Brazil, where dispersion is restricted by surrounding mountain ranges. It is shown here that road transport is also a large source of gases and aerosols, which can dominate pollutant concentrations at ground level, depending on meteorological conditions. SO2 was released mainly by industry, while road transport was a major source of NOx. Rapid removal of NO2 and SO2 was attributed to fast gas phase and heterogeneous reactions, respectively. Average PM10 concentrations increased by an order of magnitude during sea breeze fumigation, and high particulate pollution events were associated with vehicular activity. It is demonstrated that fast-response portable instrumentation can provide a useful alternative to measurements at fixed network sites for spatial (horizontal and vertical) mapping of atmospheric pollutants.
Convergent synthesis of siloxane starburst dendrons and dendrimers via hydrosilylation

New highly branched starburst dendrons and dendrimers containing siloxane linkages were convergently synthetized via hydrosilylation. Allyl cyanide all allybis[4-(hydroxydimethylsilyl)phenyl]-methylsilane were used as the starting material and building block, respectively. The allyl group was a synthon of (N,N-diethylamino)silane, which was a suitable electrophilic silicon species. The starburst dendrons and dendrimers were constructed starting at the point which became the periphery of the molecule
Ascorbate Oxidation Catalyzed by Bis(histidine)copper(II)

The kinetics of ascorbic acid oxidation by molecular oxygen, catalyzed by bis(histidine)copper(II) (CuL22+), was followed in 0.1 M phosphate buffer at pH 7.0. Saturation of the oxidation rate was observed at increasing O2, ascorbate and CuL22+ concentrations. The oxidation state of the copper ion during the catalysis and the concentration of the ascorbyl radical were followed by ESR and/or by optical spectroscopy. No significant reduction of Cu(II) was observed under vacuum or in the presence of oxygen at ascorbate concentrations <20 mM. Evidence for the binding of ascorbate to CuL22+ was found by ESR, and a stability constant of 20 M-1 was estimated. We suggested a mechanism which is consistent with our experimental findings and explains some of the contradictory data reported in the past by various authors. The saturation of the reaction rate on increasing [CuL22+] is explained in terms of its catalytic effect on ascorbate oxidation and the superoxide dismutase-like activity of this complex. The experim.
Chain Dynamics and Strain-Induced Crystallization of Pre- and Postvulcanized Natural Rubber Latex Using Proton Multiple Quantum NMR and Uniaxial Deformation by in Situ Synchrotron X-ray Diffraction

The structural development and morphology in unvulcanized and vulcanized (both pre- and postvulcanized) natural rubber latex were studied in a relaxed state and under deformation by multiple-quantum (MQ) NMR and in situ wide-angle X-ray diffraction (WAXD), respectively. Vulcanization was carried out using both sulfur and peroxide, showing important differences on the spatial distribution of cross-links according to the source of vulcanizing agents. Sulfur prevulcanization promotes the formation of highly homogeneous networks in the dispersed rubber particles, whereas peroxide vulcanization makes broader spatial cross-link distributions. The latter is compatible with the formation of core–shell network structures. Molecular orientation and strain-induced crystallization were analyzed by both stress–strain relations and WAXD. An increase in the vulcanizing agent concentration led to an increase in modulus and crystalline fractions. For sulfur vulcanization, the additional heat treatment (postvulcanization) .
Anti-senescence and anti-wrinkle activities of 3—bromo—4,5—dihydroxybenzaldehyde from Polysiphonia morrowii Harvey in human dermal fibroblasts

Objective: To investigate the anti-senescence effect of 3-bromo-4,5- dihydroxybenzaldehyde (BDB) from Polysiphonia morrowii Harvey in human dermal fibroblasts (HDF). Methods: HDF were subjected to treatment of BDB and then treated with hydrogen peroxide (H2O2) to induce premature senescence. Senescence-associated β-galactosidase (SA-β-gal) activity in HDF was determined using the SA-β-gal staining method. Intracellular reactive oxygen species (ROS) production was measured using the 2’,7’-dichlorodihydrofluorescein diacetate assay. Western blotting assay was performed to assess the level of antioxidant enzyme glutathione peroxidase 1 (GPX1). In addition, intracellular collagen and collagenase contents were analyzed using the respective ELISA kits. Elastase activity in HDF supernatants was measured from p-nitroaniline release and normalized using total protein content. Results: Treatment of HDF with H2O2 increased the activity of SAP-gal, but BDB pre-treatment resulted in the reduction of SA-β- gal activity. Moreover, BDB significantly reduced H2O2-induced intracellular ROS production. BDB also markedly increased the level of GPX1, which was inhibited by 400 µM of H2O2. Furthermore, in in vitro study, BDB significantly increased intracellular collagen content and decreased matrix metalloproteinase-1 and elastase activities in HDF. Conclusions: Our results demonstrate that BDB shows anti- senescence and anti-wrinkle activities in vitro.
Comparison of whole-body bone scintigraphy with axial skeleton magnetic resonance imaging in the skeletal evaluation of carcinoma prostate

Introduction: Whole-body bone scintigraphy (WBBS) is considered to be the standard of care in the initial skeletal evaluation of patients with carcinoma prostate. Magnetic resonance imaging (MRI) is a potential alternative technique for detecting bone metastasis. The objective of this study was to compare the diagnostic performance of WBBS with a single-photon emission computed tomography–computed tomography (SPECT-CT) correlation of the suspicious WBBS lesions to the axial skeleton (AS)-MRI in diagnosing bone metastasis in patients with carcinoma prostate. Methods: WBBS and AS-MRI were both performed during the initial skeletal evaluation in 35 patients of carcinoma prostate with the prostate-specific antigen (PSA) in the range of 10–50 ng/ml. Suspicious lesions on the WBBS were correlated on SPECT CT. The presence or absence of metastasis was determined by best valuable comparator. The validity parameters of WBBS and AS-MRI were computed and compared. Results: The sensitivity, specificity, positive predictive value, and negative predictive value of WBBS and AS-MRI for detecting patients with bone metastasis were 55.6%, 88.5%, 62.5%, 85.2% and 100.0%, 96.2%, 90.0%, 100%, respectively. The kappa value and the accuracy of WBBS were 0.457 and 80.0%, respectively. The kappa value and accuracy of AS-MRI were 0.928 and 97.1%, respectively. Conclusions: The diagnostic performance of AS-MRI in detecting patients with bone metastasis due to carcinoma prostate is superior to that of WBBS with SPECT-CT correlation of the suspicious lesions in the PSA range of 10–50 ng/ml.
Effect of hormones on auditory processing abilities in females

Introduction: Central auditory information processing is influenced by the changing hormonal levels across the menstrual cycle, which might affect auditory perception. The present study aimed to assess auditory processing abilities in females across different phases of the menstrual cycle. Methods: A total of 21 participants (11 females and 10 males) in the age range of 18 to 25 years were recruited in the study. Group 1 included 11 healthy female participants with a regular menstrual cycle and Group 2 included 10 healthy male participants. The participants were evaluated for all the major auditory processes to assess central auditory processing. Auditory closure was assessed through speech perception in noise test in Kannada; binaural integration was assessed through the dichoticconsonant vowel (CV) test. The temporal processing was assessed through a gap detection test (GDT) and working memory was assessed using a digit span test. The central auditory assessment in Group 1 was done during the three menstrual phases namely early follicular stage (days 1 to 3), late follicular and early luteal (days 12 to 14), and late luteal (days 23 to 26). In Group 2, the central auditory assessment was done three times with each trial separated by the same number of days equaling the different phases as in females. Results: Results showed no significant differences in dichotic CV test, speech perception in noise test, GDT and working memory test (P > 0.05) in both Groups 1 and 2. Conclusion: To conclude, there is no difference in central processing abilities across three different phases of the menstrual cycle.
Putative periodontal pathogens in persisting periodontal pockets of endodontic origin

Background: The microbial profile of endodontically treated teeth, presenting with a persisting deep periodontal pocket, secondary to a primary endodontic lesion, draining through the gingival crevice, has received very less attention. This observational study was done to evaluate if these sites with persisting pockets of endodontic origin persist because they have acquired bacteria which are considered as putative periodontal pathogens. Materials and Methods: Subgingival plaque samples were collected from fifty patients diagnosed with a primary endodontic and a secondary periodontal lesion that persisted even after completion of the root canal treatment. Clinical parameters such as probing pocket depth, clinical attachment level, plaque index, furcation, and tooth mobility were recorded. Real-time polymerase chain reaction was used to determine the possible association between six bacteria, which are frequently associated with periodontal and endodontic lesions. Results: The mean cycle threshold value for Treponema denticola (Td) was found to be 33.74, and for Enterococcus faecalis (Ef), it was 34.39. With regard to clinical attachment loss, Td (P < 0.04) and Parvimonas micra (P < 0.05) had a significant correlation. Conclusion: Ef (92%) and Td (86%) were found to be most prevalent. Porphyromonas gingivalis and Tannerella forsythia were in minimal to nonexistent levels.
Utility of gastric ultrasound in evaluating nil per os status in a child

Although rare, the aspiration of gastric contents can lead to significant morbidity or even mortality in pediatric patients receiving anesthetic care. For elective cases, routine preoperative practices include the use of standard nil per os times to decrease the risk of aspiration. However, patients may fail to adhere to provided NPO guidelines or other patient factors may impact the efficacy of standard NPO times. Gastric point-of-care ultrasound provides information on the volume and quality of gastric contents and may allow improved patient management strategies. We present a 4-year-old patient who presented for bilateral myringotomy with tympanostomy tube insertion, who was found to have evidence of a full stomach during preoperative gastric ultrasound examination. The use of preoperative gastric point-of-care ultrasound in evaluating stomach contents and confirming NPO times is reviewed and its application to perioperative practice discussed.
Firibastat, the first-in-class brain aminopeptidase a inhibitor, in the management of hypertension: A review of clinical trials

Abstract An unfortunate subset of hypertensive patients develops resistant hypertension in which optimal doses of three or more first-line antihypertensive drugs fail to sufficiently control blood pressure. Patients with resistant hypertension represent a high-risk and difficult-to-treat group, and such patients are at amplified jeopardies for substantial hypertension-related multi-organ failure, morbidity, and mortality. Thus, there is a pressing requirement to better improve blood pressure control through the pharmaceutical generation of novel classes of antihypertensive drugs that act on newer and alternative therapeutic targets. The hyperactivity of the brain renin-angiotensin system (RAS) has been shown to play a role in the pathogenesis of hypertension in various experimental and genetic hypertensive animal models. In the brain, angiotensin-II is metabolized to angiotensin-III by aminopeptidase A (APA), a membrane-bound zinc metalloprotease enzyme. A large body of evidence has previously established that angiotensin-III is one of the main effector peptides of the brain RAS. Angiotensin-III exerts central stimulatory regulation over blood pressure through several proposed mechanisms. Accumulating evidence from preclinical studies demonstrated that the centrally acting APA inhibitor prodrugs (firibastat and NI956) are very safe and effective at reducing blood pressure in various hypertensive animal models. The primary purpose of this study is to narratively review the published phase I–II literature on the safety and efficacy of APA inhibitors in the management of patients with hypertension. Moreover, a summary of ongoing clinical trials and future perspectives are presented.
Fault Diagnosis for Power Converters based on Random Forests and Feature Transformation

Power converters have been key enablers of many energy conversion fields, and it is a trend to apply artificial intelligent (AI) technology to power converters to improve stability. A novel fault diagnosis method based on the combination of random forests (RFs) and feature transformation is proposed in this paper. Firstly, the three-phase AC fault currents of three-phase PWM rectifier are analyzed as examples. Secondly, the feature transformation, a novel current trajectories slopes based method, is adopted to transform the fault currents data. With the help of feature transformation, the fault diagnosis classifier can obtain a good load adaptability. And then the RFs based method, a data-driven method, is employed to train the fault diagnosis classifier with the fault current trajectories slopes data. Finally, the proposed method is carried out on an three-phase PWM rectifier system, which can detect and locate the open-circuit faults of IGBTs.
Effect of Yellowfin Tuna Bone Derived Hydroxyapatite on Hela and Vero Cell Line Proliferation

This study aimed to evaluate the proliferation of Vero and Hela cells after exposed to yellowfin tuna bone derived hydroxyapatite (THA). Vero and Hela cells were cultured in M199 medium and RPMI respectively, supplemented with 10% FBS, 2% Penicillin and Streptomycin, and 0.5% fungizone. The cells were exposed to various concentrations (12.5 to 100 μg/ml) of THA for 24 and 48 hours. The proliferation of the cells was examined using MTT assay. The results showed that the proliferation percentage of Vero and Hela cells was more than 100% in all treatment groups. ANOVA showed no statistically difference in the optical density (OD) values among the groups of Vero cells exposed to THA for 24 and 48 hours (p>0.05). However, OD values of the Vero cells exposed to 25, 50 and 100 μg/ml THA after 48 hours exposure were significantly higher compared to the control group (p<0.05). ANOVA showed statistically difference in the OD values among the Hela cells (p<0.05) after 24 and 48 hours exposure to various concentration of THA. In conclusion, Vero and Hela cells enhance their proliferation after exposed to THA, suggesting the potency of THA to be used as a biomaterial. Experimental article (J Int Dent Med Res 2020; 13(4): 1299-1303)
Optimization of ultraviolet laser doping for crystalline silicon solar cells with a novel segmented selective emitter design

This paper reports on the use of ultraviolet laser for forming segmented selective emitters on POCl 3 n + –p–p + solar cells. Laser scan speed, pulse power, and repetition rate are optimized to minimize laser‐induced defects, which are found to enhance recombination and reduce the local open‐circuit voltage. Laser‐doped selective emitters formed by locally driving in additional phosphorous from the diffusion glass are well suited for an etchback process without the need for a mask. In this paper, we show a novel selective emitter design that is segmented instead of continuous, combined with an emitter etchback process gives an efficiency improvement of about 0.3% absolute over a standard industrial type solar cell and 0.2% absolute improvement over a non‐segmented selective emitter solar cell. Copyright © 2012 John Wiley & Sons, Ltd.