Miracle-dz/UniFAR-FTUs huggingface dataset:
Deep learning in histopathology: A review

Histopathology is diagnosis based on visual examination of tissue sections under a microscope. With the growing number of digitally scanned tissue slide images, computer‐based segmentation and classification of these images is a high‐demand area of research. Convolutional neural networks (CNNs) constitute the most popular classification architecture for a variety of image classification problems. However, applying CNNs to histology slides is not a trivial task and has several challenges, ranging from variations in the colors of slides to excessive high resolution and lack of proper labeling. In this advanced review, we introduce the application of CNN‐based architectures to digital histological image analysis, discuss some problems associated with such analysis, and look at possible solutions.
Adaptation and psychological problems and suggestions for solution of foreign students studying at medical faculty

Aim: Students who change places due to social, economic, geographical, cultural, and war reasons are likely to experience difficulties while adapting to the new environment. The aim of this study is to identify adaptation and psychological problems experienced by foreign students and to present suggestions to faculty education commissions to improve the health and education conditions. Materials and Methods: The study was conducted between January and March 2020. The universe of the study consisted of all foreign students in the 2019-2020 academic year studying at the medical school. No sampling method was used in the study by aiming to reach the entire population. Foreign students studying at the Faculty of Medicine filled out a questionnaire including the educational problems experienced by the students and Beck’s Depression Inventory (BDI). Results: The most common problems of foreign students were as; language problems in 50 (49.0%) students, being away from family in 31 (30.4%) students, and financial problems in 21 (20.6%) students. It was found that 39.2% (n = 40) of the students had minor depression, 29.4% (n = 30) had mild depression, 26.5% (n = 27) had moderate depression and 4.5% (n = 5) had severe depression scores according to BDI. 69.5% of the students stated that they faced negative behaviors because they were foreigners. Conclusion: Supportive interventions can prevent the development of depression by providing academic and psychological relief to foreign students.
Obtaining Salt Stress-Tolerant Eggplant Somaclonal Variants from In Vitro Selection

An efficient regeneration protocol was applied to regenerate shoots on salt stress-tolerant calli lines of aubergine (Solanum melongena). These NaCl-tolerant cell lines were obtained by two different methods. On the one hand, the developed callus tissue was transferred to a medium with a continuous salt content of 40, 80, 120, or 160 mM NaCl. On the other hand, the callus tissue was subjected to a stepwise increasing salinity to 160 mM NaCl every 30 days. With the second method, calli which could be selected were characterized by compact growth, a greenish color, and absence of necrotic zones. When grown on salt-free medium again, NaCl-tolerant calli showed a decline in relative growth rate and water content in comparison to the control line. This was more obvious in the 120 mM NaCl-tolerant callus. Lipid peroxidase activity increased in 40 and 80 mM NaCl-tolerant calli; yet did not increase further in 120 mM-tolerant callus. An increase in ascorbic acid content was observed in 80 and 120 mM NaCl-tolerant calli compared to the 40 mM NaCl-tolerant lines, in which ascorbic acid content was twice that of the control. All NaCl-tolerant lines showed significantly higher superoxide dismutase (SOD) (208–305–370 µmol min−1 mg−1 FW) and catalase (CAT) (136–211–238 µmol min−1 mg−1 FW) activities compared to control plants (231 and 126 µmol min−1 mg−1 FW). Plants were regenerated on the calli lines that could tolerate up to 120 mM NaCl. From the 32 plants tested in vitro, ten plants with a higher number of leaves and root length could be selected for further evaluation in the field. Their high salt tolerance was evident by their more elevated fresh and dry weight, their more increased relative water content, and a higher number and weight of fruits compared to the wild-type parental control. The presented work shows that somaclonal variation can be efficiently used to develop salt-tolerant mutants.
Effects of Process Parameters on the Yield of Alkali from Oil Palm Male Inflorescence (Ash).

This study investigated the effects of process parameters on the yield of alkali from oil palm male inflorescence ash. The dried stalk of the oil palm inflorescence bunches were size reduced and burned in an incinerator in the presence of air. A measured quantity of the ash was dissolved in known quantity of distilled water in a 500ml glass reactor to obtain the alkali. Different stirring speeds, temperature, concentration and time were considered during the experiment for the production of the alkaline solution. Finally the concentrations of the different alkaline samples were determined from the experimental runs. The optimum parameter values were found to be a time of 50mins, a stirring speed of 500rpm, a temperature of 50 0 C, and a concentration of 60g/l of distilled water. An optimum yield of 11.74% alkalinity was recorded. Standard statistical software design expert (8.0.2) was applied in the plotting of various graphs and generation of the ANOVA table from which a linear model was developed. From the model equation it was observed that parameter B which is the stirring speed gave the highest effect and also of highest significance. These facts were subsequently validated.
Atmospheric profiling synthetic observation system at THz

In this paper, we will introduce a dual-THz-band SIS (Superconductor-Insulator-Superconductor) heterodyne radiometer system developed for the atmospheric profiling synthetic observation system project (APSOS). This THz system is intended to have a durable and compact design to meet the challenging requirements of remote operation. The system as well as its major components such as antenna tipping, quasi-optics, cryogenics, SIS mixers and FFTS backend will be discussed thoroughly. Some scientific simulation focusing on the atmospheric profiling components at THz bands will also be investigated.
Relative reduction in annual soil loss in micro watersheds due to the relief and forest cover

With the intense debate, in Brazil, between landowners and public agencies about the amount of area with forest cover needed in different regions, there is an increase of the need for provision of technical data used as a basis for decision making. One of the criteria to evaluate the effect of forest cover in protecting water resources is the soil loss, which leads to several consequences on the environment, including the silting of the rivers. Therefore, this study aimed to evaluate the reduction in the soil loss in micro watersheds with different reliefs, size and location of forest cover, in the Corumbatai River watershed, in the state of Sao Paulo, using the Revised Universal Soil Loss Equation (RUSLE) in a GIS environment. For this study, 18 watersheds in three degrees of slope were selected, and 20 scenarios for land-use were established, by analyzing the influence of the PPA size, and the size and the location of the Legal Reserve. The results showed that: a) the effect of forest cover in reducing annual soil loss varies depending on the average slope of the watershed; b) the PPA width must be determined taking into account the slope of the watershed; c) the Legal Reserve must be located along the PPA. These provide better results in reducing annual soil loss.
Optimization of Resonant Inductive Wireless Power Transfer Using Multilayer Flat Spiral Coils

A method of using loading capacitors of varying sizes to experimentally determine the alternating current behavior of resistance and inductance for a multilayer flat spiral coil is presented. For the presented coil design, the Dowell method is shown to underpredict the alternating current resistance of the coil by as much as a factor of 4 for frequencies up to 10 kHz. A classical modification to the Dowell method produces improved results but still underpredicts the alternating current resistance by as much as a factor of 2. Curve fits of the form used in Dowell’s method are applied to experimentally obtained data, allowing for the identification of the frequency at which wireless power transfer efficiency is maximized. In addition, an analytical approach to predicting coil impedance vs the duty cycle of a rectangular wave applied voltage is presented and is shown to agree well with experimentally obtained results.
Printed nonuniform antenna array for WI‐FI sectorized communications

Wireless networks have joined to the sports venues, offering to the public a set of facilities, such as the access to email, news, and also to use the social networking, uploading their photos. New challenges have emerged to provide Wi‐Fi in this densely populated stadiums, such as increasing capacity and coverage. In this article, an access point antenna array to cover a sector of a stadium is presented. Its structure, designed in a low cost material allows to reduce the total manufacturing costs, an important factor due to the large number of antennas required in these venues. The material characteristic, the broad bandwidth of operation (300 MHz), along with to the low side lobe levels, important to reduce interference between sectors, makes this antenna well‐positioned for wireless communications in these particular locals. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2037–2041, 2015
Longitudinal impedance tuner using a new material, FINEMET

We have succeeded to cancel longitudinal space charge effects using an ‘impedance tuner’ at the KEK-PS. The impedance tuner consists of the new material, ‘FINEMET’, which has a large permeability over the beam spectrum region. The frequency shift of the coherent quadrupole mode is measured to infer a modified impedance. It turns out that unavoidable nonlinearity in a longitudinal rf bucket has to be treated carefully in order to digest the observed beam signals. We will describe here how to measure the impedance from the beam signal, how to analyze the effect of the impedance tuner, and how to succeed in canceling any space charge effects.
Two new species of oribatid mites of the genus Xenillus (Acari, Oribatida, Liacaridae) from Bolivia

Two new species of oribatid mites of the genus Xenillus (Oribatida, Liacaridae) are described from leaf litter in a rain forest in Bolivia. Xenillus pseudobolivianus sp. n. is similar to X. bolivianus and X. neonominatus in the morphology of lamellar cusp, length of bothridial and interlamellar setae and length and morphology of dorsal notogastral setae, but differs from both by the morphology of bothridial head and interlamellar and notogastral setae, the ornamentation of the notogaster, and the different length of some notogastral setae. Xenillus amboroensis sp. n. is similar to X. amazonensis, X. disjunctus, X. diversisetosus, X. fecundus, X. longipes, and X. ornatus in the morphology of bothridial seta, but differs from all by the morphology of lamellar cusp, the placement of the lamellar seta, and the different length of some notogastral setae.
Using Electronic Voting Systems Data outside Lectures to Support Learning

Many years of research into using Electronic Voting Systems (EVS) within lectures has so far led to the conclusion that EVS is of beneficial value to students’ learning by involving students directly in conversation and deeper reflection. EVS researchers have proposed that using the voting data from EVS outside the lecture theatre may also benefit learning. They suggest that an Integrated Learning Environment (ILE) presenting this data would enable students to self-direct their learning and tutors to continue the dialogue from lectures. This thesis describes the implementation of such an ILE used within an introductory programming course at the University of Glasgow, in order to investigate these proposed benefits. The results show that there are certain benefits to this approach but these are small compared to the benefits within lectures. Only some questions are likely to generate these benefits and only some students seem to have an attitude towards learning to appreciate this. The results also show that there may not be reason to build an ILE to provide these benefits. This thesis discusses to what extent students use the questions in lectures as an instigator into deeper reflection and to what extent the EVS data can be used to provide an accurate assessment of students’ attainment. This thesis also discusses what impact the instructional design of the course has on students’ learning and uses this discussion to illuminate the findings. This reasoning leads to suggested changes to the instructional design to provide better opportunity for deeper reflection amongst the students. This suggestion is currently being trialled and judging from early observations seems prosperous.
A multi-year cross-validation experiment for estimating rice plant area index (PAI) over the JECAM-India test site from simulated RADARSAT constellation mission (RCM) compact polarimetric SAR data

ABSTRACT Using the cross-validation approach, strategies for estimating biophysical parameters are still pre-operational with synthetic aperture radar (SAR) data. In this regard, the Joint Experiment for Crop Assessment and Monitoring (JECAM) SAR inter-comparison experiments provide an opportunity for the potential implementation of cross-validation strategies for biophysical parameters retrieval utilizing the next-generation compact polarimetric (CP) modes available from the RADARSAT Constellation Mission (RCM). This work first uses the conventional semi-empirical Water Cloud Model (WCM) modified by exploiting the scattering power decompositions of CP measurements to estimate the Plant Area Index (PAI) for rice. The modified WCM (MWCM) is then inverted using the scattering power components from the decomposition. We compare the PAI estimates using MWCM- between the estimates obtained from (1) the conventional WCM using the RH and RV backscatter intensities and (2) MWCM- decomposition scattering powers. We exploit a time series of simulated compact-pol SAR data over the JECAM test site in Vijayawada, India, throughout 2018 and 2019. We use the C-band RADARSAT-2 full-pol data to simulate the RADARSAT Constellation Mission (RCM) compact-pol mode data. Utilizing the advantage of systematically collected multi-year SAR data and in-situ measurements, the present research also assesses the calibrated model transferability performances to another data set and cross-validation of a model in a multi-year experiment setting. The comparative analysis indicates potential improvements in PAI estimation with MWCM- scattering powers. A high range of correlation coefficient ( ) between the estimated and observed PAI is observed with good Root Mean Square Error (RMSE) of m2 m−2, and Mean Absolute Error (MAE) of m2 m−2.
Application of local and global particle swarm optimization algorithms to optimal design and operation of irrigation pumping systems

A particle swarm optimization (PSO) algorithm is used in this paper for optimal design and operation of irrigation pumping systems. An irrigation pumping systems design and management model is first introduced and subsequently solved with the newly introduced PSO algorithm. The solution of the model is carried out in two steps. In the first step an exhaustive enumeration is carried out to find all feasible sets of pump combinations able to cope with a given demand curve over the required period. The PSO algorithm is then called in to search for optimal operation of each set. Having solved the operation problem of all feasible sets, the total cost of operation and depreciation of initial investment is calculated for all the sets and the optimal set and the corresponding optimal operating policy is determined. The proposed model is applied to the design and operation of a real‐world irrigation pumping system and the results are presented and compared with those of a genetic algorithm. Two global and local versions of the PSO algorithm are used and their efficiencies are compared to each other and that of a genetic algorithm (GA) model. The results indicate that the proposed model in conjunction with the PSO algorithm is a versatile management model for the design and operation of real‐world irrigation pumping systems. Copyright © 2008 John Wiley & Sons, Ltd.
Customers' joining behavior in an unobservable GI/Geo/m queue

This paper studies the equilibrium balking strategies of impatient customers in a discrete-time multi-server renewal input queue with identical servers. Arriving customers are unaware of the number of customers in the queue before making a decision whether to join or balk the queue. We model the decision-making process as a non-cooperative symmetric game and derive the Nash equilibrium mixed strategy and optimal social strategies. The stationary system-length distributions at different observation epochs under the equilibrium structure are obtained using the roots method. Finally, some numerical examples are presented to show the effect of the information level together with system parameters on the equilibrium and social behavior of impatient customers.
Low-thermal-resistance flip-chip fine package for 1-W voltage regulator IC

A low-thermal-resistance flip-chip fine package (FFP) for a voltage regulator IC is described. This FFP is a chip size package (CSP) developed for low-pin-count ICs. It consists of an alumina ceramic substrate, flip-chip bonded ICs and underfill resin. The thermal conductivity of the alumina ceramic substrate is about 50 times greater than that of the resin used in conventional plastic mold packages. The thermal path from the heat source in the IC chip to the substrate is very short because the IC, which has Au bumps, is flip-chip bonded to the metal pattern on the ceramic substrate. This offers superior thermal resistance to that in conventional plastic mold packages. The finite element method (FEM) was used to simulate the thermal resistance reduction effects of varying the substrate size and material, the copper-pattern area and the via holes on the printed circuit board (PCB). An actual thermal resistance of 130/spl deg/C/W (0.96 W power dissipation at T/sub j/=150/spl deg/C) was observed in a 3.0/spl times/3.0/spl times/0.65 mm FFP mounted on a 6/spl times/10 mm copper-pattern PCB. This value is almost the same as that arrived at in simulations, and that of To-252, a conventional plastic mold package.
Energy Conservation Opportunities in an Industrial Boiler System

In this study, an experimental study has been performed for a natural gas fueled boiler operating at 42,000-kPa pressure and 713.15-K temperature with a nominal capacity of 33.33 kg/s to find improvement in the boiler efficiency. Temperature, pressure, velocity, and gas emissions measurements have been made and energy, mass balances, and exergy analysis have been formed. Then, efficiency of boiler, potential energy saving options and saving quantities, investment costs, and payback period for normal operating conditions have been calculated. From the measured data, the boiler and exergetic efficiency were calculated as 88.28 and 36.7%, respectively. It is seen that the main efficiency losses are leakage of air in the rotary type air heaters, operation of the boiler at high excess air/fuel ratios, operation of the boiler under the rated load, surface thermal losses, and high flue gas temperatures. The largest part of the boiler efficiency losses is due to the air leakage in the rotary type air heater. Due .
Probabilistic evaluation of available power of a renewable generation system consisting of wind turbines and storage batteries: A Markov chain method

A major drawback of renewable power sources is their fluctuant characteristics. To overcome this drawback, a battery storage system is the prevalent way to smooth the fluctuation of renewable power sources. It is a critical problem whether such a smooth can lead to a constant output power for a renewable generator consisting of renewable power source and the associated battery storage system. This paper provides a probabilistic answer for this problem by making use of Markov Chain method. The obtained results are analytic and their efficacy is verified by a comparison with that the Monte Carlo simulation technique.
Chromatographic Method for Quantification of Tenofovir in Pharmaceutical Formulations: Comparison with Spectrophotometric Method

Aims: An efficient therapeutic drug or antiviral agent to treat Covid-19 is still not available. But, previously licensed pharmaceuticals to treat other virus infections are usedon an off-label basis either alone or in combination. Tenofovir emerged as a promising treatment for Covid-19 in September 2020. It is an antiretroviral drug that is active against many viruses. This study explains the development and asessment of liquid chromatographic and UV spectrophotometric methods to quantify tenofovir in raw materials and tablets. Methods: HPLC analyzes were performed using a C18 column and a mobile phase composed of 20 mM KH2PO4, with a flow rate of 0.8 mLmin-1 and UV detection at 260 nm. For the spectrophotometric analyzes, ultra-pure water was used as a solvent. UV spectrum of standard and sample solution were recorded between 200 and400 nm and Tenofovir was detected using a wavelength of 260 nm. Both methods have been validated according to the procedures described in ICH guidelines Q2(R1) for the validation of analytical methods. Results: The results showed that both spectrophotometric and liquid chromatographic methods were linear, precise, accurate, rugged and robust with relative standard deviation R.S. D. % values less than 1%, and the recovery percentage was within standard limits (98-102%). Then a statistical comparison of these two analytical methods was performed, and the results of both methods showed no significant difference. It was found that both methods were not statistically significant with respect to each other in the 95% confidence interval (p<0.05). As a result, the proposed methods were found to be highly effective and could be used for routine analysis of tenofovir in pharmaceutical formulations.
A Guide to Scleral Lens Fitting

Video: How to Use Scleral Lenses Produced by the Scleral Lens Education Society, this 10-minute video demonstrates and explains how patients should apply, remove and care for their lenses, including: • Hand hygiene and lens inspection • How to use application and removal devices • How to prevent air bubbles and why this is important • Proper lens cleaning and storage • Lens case hygiene The video is available at: sclerallens.org/how-use-scleral-lenses A Guide to Scleral Lens Fitting Written by Eef van der Worp, BOptom, PhD, FAAO, this well-researched guide provides detailed information on scleral lens designs, fitting steps and troubleshooting. It is available in English, French, Spanish, German, Serbian and Italian. To receive a hard copy, contact your local Boston Products laboratory or download a full-text version at: commons.pacificu. edu/mono/4/