Miracle-dz/UniFAR-FTUs huggingface dataset:
Clinico-Pathological Correlation in Dermatological Disorders: A Retrospective Audit of 332 Skin Biopsies from a Tertiary Care Center

Background: Skin biopsy is a frequently employed tool by the dermatologists with several factors that are known to influence its diagnostic yield as well as interpretation. The objective of our study was to analyze the clinico-pathological concordance and discordance rates in various dermatological conditions and study the factors affecting the same. Materials and Methods: We retrospectively analyzed 332 biopsies conducted over a period of 1 year and looked for clinico-pathological correlation and tabulated the results. Results: The overall concordance rate observed in the present study was 70.48% (234 out of 332). Out of 234 concordant cases, 175 of them (74.8%) were concordant with the first differential diagnosis mentioned on the histopathology requisition form, thus revealing an acceptable level of clinico-pathological correlation. The concordance was observed to be 66.87% when only one differential was mentioned on the requisition forms, whereas it increased to 73.96% when more than one diagnosis was offered (P = <0.00001). However, the adequacy of clinical description on the histopathological requisition form was not observed to significantly impact the clinico-pathological correlation in the present study. Conclusion: An acceptable level of clinico-pathological concordance was observed in the present study thus reinforcing skin biopsy as an indispensable tool in the dermatological practice. However, continuous effort in the form of regular audits in the department, interdepartmental discussions between pathologists and clinicians, and repeat biopsies in case of discordancy would help in identifying and addressing the deficiencies that impact the diagnostic yield of histopathology and which would ultimately result in better patient care.
Dislocation Propagation into MBE Grown GaAs Layers under the Condition of Misfit Dislocation Generation

Dislocation propagation under a misfit dislocation generation condition into an MBE grown GaAs layer from a nearly dislocation-free indium-doped substrate and the epi-layer/substrate interface is investigated. Thermally stress-induced substrate dislocations of 60°-type lying on {111} planes are usually forced to bend at the interface. However, grown-in substrate dislocations with composite Burgers vectors, which are propagated from a seed-crystal, are not forced and penetrate into the epi-layer. Moreover, dislocations independent of substrate dislocations emerge in the epi-layer from the interface.
Can portable Colposcopes Replace Standard-of-care Colposcopes? A Crossover Trial of Two Portable Colposcopes with a Standard-of-Care Video Colposcope

Background: Screen positive women need to be triaged by colposcopy which is a major challenge in low-middle income countries. Portable colposcopes may overcome many challenges, reduce referrals and enable a single visit approach. This study assessed the performance of portable colposcopes and potential to reduce referral. Method: This crossover randomised study enrolled women aged 25 to 65 years with abnormal screening result or cervical symptoms. All women underwent visual inspection with acetic acid (VIA), HPV test, colposcopy with two portable colposcopes (Gynocular®, Gynius, Sweden, and Pocket® transvaginal colposcope, Duke University, NC, USA) and a standard video colposcope, and biopsy. Colposcopic Swede score agreement between portable and video colposcopes, as well as agreement of Swede score with histology were calculated for each device. The potential impact of portable colposcopes in a single visit approach was assessed based on the final diagnosis. Results: Among 250 subjects, 27(10.80%) had high-grade cervical intraepithelial neoplasia (CIN2+) lesions. Swede scores for Pocket and Gynocular colposcopes were similar to video colposcope in 248 (99.20%) and 247 (98.80%) subjects, respectively (agreement scores 0.9969 and 0.9954, respectively). At a Swede score cut-off of ≥5, all three devices had identical sensitivity, specificity, positive and negative predictive value of 96.30%, 92.30%, 60.50% and 99.50,. Ablative treatment offered at field setting would result in optimal treatment in 52.0% and 85.1% cases when screened with VIA and HPV test respectively; using Pocket colposcope could improve this to 94.0% and 95.9%, respectively. Overtreatment and referral rates reduced from 46.8% and 12.4% to 4.8% and 6.0%, respectively, when VIA test is followed by triage with pocket colposcope. These outcomes were comparable to screening with HPV followed by colposcopy triage. Conclusions: Pocket colposcope performed comparably to the video colposcope. Used by healthcare providers in the field setting, they can augment the results of VIA significantly.
Double Exponential Formulas for Numerical Integration

A family of numerical quadrature formulas is introduced by application of the trapezoidal rule to infinite integrals which result from the given integrals f b \ f(x)dx by suitable variable transformations x = <j)(u}. These formulas are characterized by having double exponential asymptotic behavior of the integrands in the resulting infinite integrals as ii-»±oo, and it is shown both analytically and numerically that such formulas are generally optimal with respect to the ecomony of the number of sampling points. §
Effects of planting pattern and sowing method on the seed yield of safflower, oilseed rape, and lupin

Abstract The effects of sowing methods, sowing rates, and plant patterns on seed yield of safflower, oilseed rape, and lupin crops were investigated in trial plots. Conventional sowing methods, precision sowing in wide rows and precision sowing to an on-the-square pattern were compared. Safflower and lupin seed yields increased when precision sown to an approximately on-the-square pattern, but gave no further increase when sown accurately on-the-square. The roller drill method of sowing oilseed rape at high populations gave the best yield of this crop. A safflower radial trial gave an optimum plant population of 1.6 million plants per hectare.
Extreme charge density SrTiO3/GdTiO3 heterostructure field effect transistors

We report on the fabrication and electrical characteristics of the first SrTiO3/GdTiO3 (STO/GTO) heterostructure field-effect transistors (HFETs). The high two-dimensional electron gas (2DEG) density of 3 × 1014 cm−2 formed due to the polar discontinuity at the STO/GTO interface was used as a channel to create inverted HFETs. Plasma O2 treatment was found to reduce current leakage by 3 orders of magnitude at reverse bias, leading to rectifying Schottky behavior. A charge modulation of 0.6 × 1014 cm−2 is reported here, which represents the highest sheet charge modulated in any planar field effect transistor to date.
Approximating the effect of the Casimir force on the instability of electrostatic nano-cantilevers

In this paper, the homotopy perturbation method (HPM) is used to investigate the effect of the Casimir force on the pull-in instability of electrostatic actuators at nano-scale separations. The proposed HPM is employed to solve nonlinear constitutive equations of cantilever beam-type nanoactuators. An analytical solution is obtained in terms of convergent series with easily computable components. Basic design parameters such as critical cantilever tip deflection and pull-in voltage of the nano-cantilevers are computed. As special cases of this work, freestanding nanoactuators and electrostatic micro-actuators are investigated. The analytical HPM results agree well with numerical solutions and those from the literature.
Perturbation theory for the evaluation of the normalised cutoff frequencies in radially inhomogeneous fibres

A simple perturbation theory has been used to study the normalised cutoff frequencies of radially inhomogeneous fibres. The formalism has been developed with a truncated parabolic-index profile as zero-order solution. Numerical calculations have been carried out for α-profiles and have been found to be in good agreement with more rigorous approaches reported by previous authors.
System for measurement of low yield neutron pulses from D–D fusion reactions based upon a 3He proportional counter

A conventional neutron detection technique was adapted to measure low neutron yields from D–D fusion pulses. This method uses a 3He proportional counter surrounded by a paraffin moderator. Electric signals generated in the 3He tube are fed into a preamplifier. The output of the preamplifier is directly connected to a digital oscilloscope. The time-integrated signals represent the charge generated in the 3He tube which is proportional to the total neutron yield. The integration time is determined by the preamplifier and moderator characteristics within some hundreds of microseconds. No meaningful neutron background was detected during this time window. The system, previously calibrated, was used to measure the neutron yield (<106 neutron/pulse) generated in a fast and very small plasma focus device designed to operate with energies of tens of Joules. Neutron yields as low as 103 neutrons per pulse were measured.
Associations of suicide-related media reporting characteristics with help-seeking and suicide in Oregon and Washington

Objective: Specific content characteristics of suicide media reporting might differentially impact suicides in the population, but studies have not considered the overarching theme of the respective media stories and other relevant outcomes besides suicide, such as help-seeking behaviours. Methods: We obtained 5652 media reports related to suicide from 6 print, 44 broadcast and 251 online sources in Oregon and Washington states, published between April 2019 and March 2020. We conducted a content analysis of stories regarding their overarching focus and specific content characteristics based on media recommendations for suicide reporting. We applied logistic regression analyses to assess how focus and content characteristics were associated with subsequent calls to the US National Suicide Prevention Lifeline (Lifeline) and suicides in these two states in the week after publication compared to a control time period. Results: Compared to a focus on suicide death, a focus on suicidal ideation, suicide prevention, healing stories, community suicide crises/suicide clusters and homicide suicide was associated with more calls. As compared to a focus on suicide death, stories on suicide prevention and stories on community suicide crises/suicide clusters were also associated with no increase in suicides. Regarding specific content characteristics, there were associations that were largely consistent with previous work in the area, for example, an association of celebrity suicide reporting with increases in suicide. Conclusion: The overall focus of a media story may influence help-seeking and suicides, and several story characteristics appear to be related to both outcomes. More research is needed to investigate possible causal effects and pathways.
Finite-Horizon $H_{\infty }$ Consensus Control of Discrete Time-Varying Multiagent Systems: A Dynamic Event-Based Learning Approach

This article addresses the finite-horizon <inline-formula><tex-math notation="LaTeX">$H_{\infty }$</tex-math></inline-formula> consensus problem for general discrete time-varying multiagent systems with energy-bounded external disturbances and limited network bandwidth resource. A dynamic event-based learning approach is proposed to produce a dynamic discrete-time event-triggered scheme and a dynamic distributed <inline-formula><tex-math notation="LaTeX">$H_{\infty }$</tex-math></inline-formula> consensus protocol. Based on the local state information, the dynamic distributed <inline-formula><tex-math notation="LaTeX">$H_{\infty }$</tex-math></inline-formula> consensus protocol is developed to guarantee the <inline-formula><tex-math notation="LaTeX">$H_{\infty }$</tex-math></inline-formula> consensus of the general discrete time-varying multiagent systems with external disturbances. Besides, a novel criterion is established by employing the Lyapunov theory and considering the special dynamic triggering constraint, and the corresponding recursive learning algorithm is developed. In contrast with the previous works, the proposed dynamic event-based approach results in less network bandwidth utilization, and the novel recursive algorithm brings less conservatism of the designed controller. Finally, the effectiveness of the corresponding algorithm and the advantages of the proposed dynamic event-based approach are testified by a numerical simulation.
UBVIJHK Photometric Study of the Open Cluster NGC 2849

We present UBVIJHK photometry of the open cluster NGC 2849. Color-magnitude diagrams (CMDs) of this cluster show a well-defined main sequence and a sparse red giant branch. In spite of a relatively large color excess of E(B - V) = 0.50 ± 0.04, our color-color analysis shows that the interstellar reddening toward this cluster is compatible with the standard extinction model. The cluster also has a broad main sequence indicative of binary sequence rather than differential reddening or field contamination, as suggested elsewhere. From the ultraviolet excess, we estimate the metallicity to be [Fe/H] = -0.24 ± 0.12. A distance modulus of (m - M)0 = 13.93 ± 0.17 is obtained from zero-age main-sequence fitting. A CMD comparison with the Padua theoretical models published by Bertelli and coworkers gives an age of log t = 8.8 ± 0.1.
Shaping local information in Thailand: Hidden contradictions in the digitisation activities of the Provincial University Library Network (PULINET)

Local information (LI) in Thailand covers resources related to Indigenous and local knowledge (ILK), and cultural heritage. Thailand’s provincial universities have the national responsibility of digitising LI, enforced through the Provincial University Library Network’s (PULINET’s) Local Information Working Group (LIWG). The aim of this study is to explore how the LIWG’s digitisation activities contribute to the shaping of LI as national concern and resource. Empirical data come from interviews with 23 LIWG professionals in 2016–2017. A qualitative content analysis is performed within an overall activity theory framework with emphasis on overt and unobtrosive manifestations of contradictions through a combination of Engeström’s and Blackler’s typologies. The results show that primary contradictions exist in the form of incompatible conceptions of LI between individual group members and the group’s consensus-oriented LI definition. Secondary contradictions emerge as incongruences between group members’ general conceptions of LI, and specific digitisation activities of the LIWG. In general, LI is conceptualised as dynamic, situated, collective, culture-nature integrated resources with strong applied-use value, in line with international ILK definitions and agendas. The actual LIWG activities, however, circumscribe this conception through a restricted focus on formal regional delimitations; prominent objects; societally desirable expressions; and an academic/research framing. Overall, the findings illustrate that the LIWG’s activities contribute to shape LI as a tool for national social and cultural unity that exclude marginalised groups and societally undesirable LI expressions. In these activities, the primary and secondary types of contradictions are hidden and counteracted, rather than used as constructive opportunities for learning, change, and development. The study provides a unique, internationally framed, perspective on LI and related digitisation activities in Thailand. Methodologically, the study is case specific, limited to a cross-section in time and to data from interview accounts of LIWG members.
Mass renormalization in classical electrodynamics

The electromagnetic mass of a charged object can be calculated by three independent methods: (1) mu=u/c2, where u is the field energy of the object at rest, (2) mp=p/v, where p is the field momentum when the particle is moving at speed v, and (3) ms=F/a, where F is the self‐force when the object has acceleration a. In the context of a simple dumbbell model we demonstrate that mp=ms, but these in general exceed mu.
Activation volume and magnetization reversal of nanoparticle films composed of magnetically isolated Fe–Pt nanoparticles

We report on activation volume and magnetization reversal of Fe–Pt nanoparticle films. In order to diminish coalescence and sintering during high-temperature annealing above 700K, carbon overcoats are deposited on Fe–Pt nanoparticle-films. TEM observations reveal that grains in the Fe–Pt nanoparticle-films are kept to be 5–6nm in size even after annealing at 873K; the particle size is close to the crystalline size estimated by Scherrer’s formula as 5nm from x-ray diffraction. In-plane coercivity at room temperature is 2.5kOe; the activation volume (1.16×10−19cm3) at around the coercivity is almost equal to the physical volume of the particles observed by TEM, suggesting that the nanoparticles are magnetically isolated and the magnetization reversal is based on rotation mode in the carbon-coated nanoparticle films.
Mental Health Issues Associated With COVID-19 Among the Elderly Population: A Narrative Review

Since its discovery in December 2019, coronavirus disease 2019 (COVID-19) has been affecting humanity in economic, social, physical, and psychological manner. During COVID-19, the older population needs special consideration since they have a greater risk of developing serious illnesses. We used a narrative review approach to identify the relevant articles. PubMed, Scopus, and Google Scholar databases were searched for the following keywords: (mental health OR mental illness(es) OR anxiety OR depression OR irritability) AND (elderly OR older people OR aged 60 years or more) AND (Covid-19 OR pandemic OR chronic diseases) AND (mitigate OR manage). In the initial search, we found 948 articles related to our search string, and only 33 studies were included in this narrative review. The results demonstrated that the elderly population is more prone to mental health issues associated with COVID-19. This narrative review also reported that loneliness, stress, depression, anxiety, sleep disturbance, and suicidal ideation symptoms are experienced by the elderly during the pandemic. Our results also demonstrate that interventions, such as community activities through social interactions, and the use of digital technologies could improve the quality of life of older people and help in the mitigation and management of the adverse effects of COVID-19.
Identification of the Current Transport Mechanism in a Vertical Zr/LaB6/p-Diamond Schottky Barrier Diode for Low-Power Highly Sensitive Temperature Sensor

We proposed a low-power highly sensitive temperature sensor based on a diamond Schottky barrier diode (SBD) with an inserted lanthanum hexaboride (LaB6) interlayer at the Zr/diamond interface. The Zr/LaB6/p-diamond SBD exhibits excellent thermal stability with rectification ratios higher than <inline-formula> <tex-math notation="LaTeX">$10^{{10}}$ </tex-math></inline-formula> in a wide temperature range of 298–573 K. The Schottky barrier height (SBH) increases, whereas the ideality factor decreases with increasing temperature. This SBD delivers a high SBH of 2.06 eV and an ideality factor close to 1 at 573 K. In addition, a thermionic emission (TE) theory assumes the Gaussian distribution of SBH to be the dominating current transport mechanism (CTM) for Zr/LaB6/diamond SBD, due to the existence of SBH inhomogeneities at Zr/diamond interface. Meanwhile, the extracted values of the mean SBH and Richardson constant are 2.74 eV and 82.43 A/cm<inline-formula> <tex-math notation="LaTeX">$^{{2}}~\cdot ~\text{K}^{{2}}$ </tex-math></inline-formula>, respectively, which are much closer to their theoretical values of 2.72 eV and 96 A/cm<inline-formula> <tex-math notation="LaTeX">$^{{2}}~\cdot ~\text{K}^{{2}}$ </tex-math></inline-formula>, respectively. Furthermore, a high thermal sensitivity of 5.1 mV/K is obtained for a temperature sensor based on this SBD. Our results suggest the great potential of adopting this SBD structure for high-performance temperature sensors.
Are Drugs Associated with Microscopic Colitis? A Systematic Review and Meta-Analysis

There is growing evidence of the association of Microscopic Colitis (MC) with the use of specific medications such as proton pump inhibitors (PPIs), Selective serotonin reuptake inhibitors (SSRIs), Non-Steroidal anti-inflammatory drugs (NSAIDs), Statins and H2-receptor antagonists (H2RA). In our study, we calculated the pooled odds of MC in patients using these drugs. We performed a detailed search of major databases, including PubMed/Medline, Scopus, web of science, and Embase, to include the studies in which odds of MC were reported after using above mentioned drugs. A random-effects model was used to pool the estimates. Thirteen studies were included in our analysis consisting of 304,482 patients (34,194 cases and 270,018 controls). In eight studies, the control group consisted of a random population selected based on age, gender and same birth year, whereas 3 studies recruited patients who presented with diarrhea and underwent colonoscopy and biopsy to rule out MC. Two studies reported odds of MC for both diarrhea and random control groups. Patients taking PPIs were more likely to develop MC, AOR 2.65 (95% CI 1.81–3.50, I2 98.13%). Similarly, higher odds of association were found in patients taking SSRIs (OR 2.12, 95% CI 1.27–2.96, I2 96.46%), NSAIDs (OR 2.02, 95% CI 1.33–2.70, I2 92.70%) and Statins (OR 1.74, 95% CI 1.19–2.30, I2 96.36%). No difference in odds of developing MC was seen in patients using H2RA compared to the control group (OR 2.70, 95% CI 0.32–5.08, I2 98.67%). We performed a subgroup analysis based on the control group and found higher odds of MC in patients on PPIs compared to the random control group (OR 4.55, 95% CI 2.90–6.19, I2 98.13%). Similarly, higher odds of MC were noted for SSRI (OR 3.23, 95% CI 1.54–4.92, I2 98.31%), NSAIDs (OR 3.27, 95% CI 2.06–4.48, I2 95.38%), and Statins (OR 2.23, 95% CI 1.41–3.06, I2 98.11%) compared to the random control group. Contrary lower odds of MC were seen in the PPI and H2RA group compared to the diarrhea control group (OR 0.68, 95% CI 0.48–0.88, I2 7.26%), (OR 0.46, 95% CI 0.14–0.78, I2 0%) respectively. We found no difference in odds of MC in patients on SSRIs (OR 0.96, 95% CI 0.49–1.42, I2 37.89%), NSAIDs (OR 1.13, 95% CI 0.49–1.76, I2 59.37%) Statins (OR 0.91, 95% 0.66–1.17, I2 0%) and H2RA (OR 3.48, 95% CI −0.41–7.36, I2 98.89%) compared to the diarrhea control group. We also analyzed the association use of PPIs and NSAIDs with the development of collagenous colitis (CC) and lymphocytic colitis. Only the use of NSAIDs was associated with increased odds of developing collagenous colitis (OR 1.61, 95% CI 1.50–1.72, I2 0%). No increased odds of CC and LC were seen in PPI users. PPIs, NSAIDs, SSRIs, and Statins are associated with an increased risk of MC compared to the random control group. On the contrary, the use of PPIs, NSAIDs, SSRIs, and Statins is not associated with an increased risk of MC when compared to the diarrhea control group.
Prandtl and Rayleigh numbers dependences in Rayleigh-Bénard convection

Using low-temperature gaseous helium close to the critical point, we investigate the Prandtl-number dependence of the effective heat conductivity (Nusselt number) for a 1/2 aspect ratio Rayleigh-Bénard cell. Very weak dependence is observed in the range 0.7 < Pr < 21; 2 × 108 < Ra < 2 × 1010: the absolute value of the average logarithmic slope δ = (∂ln Nu/∂ln Pr)Ra is smaller than 0.03. A bimodality of Nu, with 7% difference between the two sets of data, is observed, which could explain some discrepancies between precise previous experiments in this range.