Effect of UV-Irradiation and Ozone Exposure on Thermal and Mechanical Properties of PLA/LDPE Films

The mechanical properties of polymer composites based on polylactide vary significantly over a wide range of values. It has been established that photodegradation of low-density polyethylene – polylactide blends occurs both in the amorphous and in the crystalline phase of the PLA matrix, which leads to deterioration of the mechanical properties of the studied mixtures. Ozonolysis affects the strength parameters of polylactide-polyethylene samples as well as photodegradation. By the differential scanning calorimetry it is determined that the melting point of polylactide decreases by 2-4 °C, the glass transition temperature - by 1-3 °C, while the degree of crystallinity increases by 3-6%. In the process of ozonolysis, the thermophysical characteristics of PLA/LDPE have changed.

Comparison of perturbative and non-perturbative methods in f(R) gravity

In this work, we investigate the structure and properties of neutron stars in $$R^2$$ R 2 gravity using two approaches, viz: the perturbative and non-perturbative methods. For this purpose, we consider NS with several nucleonic, as well as strange EoS generated in the framework of relativistic mean field models. The strange particles in the core of NS are in the form of $$\Lambda $$ Λ hyperons and quarks, in addition to the nucleons and leptons. In both the approaches, we obtain mass–radius relation for a wide range of values of the extra degree of freedom parameter a arising due to modification of gravity at large scales. The mass–radius relation of the chosen equation of states lies well within the observational limit in the case of GR. We identify the changes in the property of neutron star in the background of f(R) gravity, and compare the results in both the methods. We also identify the best suited method to study the modified gravity using the astrophysical observations.

ANSWER: Annotation Software for Electronic Reporting

PURPOSE To better use genetic testing, which is used by clinicians to explain the molecular mechanism of disease and to suggest clinical actionability and new treatment options, clinical next-generation sequencing (NGS) laboratories must send the results into reports in PDF and discrete data element format (HL7). Although most clinical diagnostic tests have set molecular markers tested and have a set range of values or a binary result (positive or negative), the NGS genetic test could examine hundreds or thousands of genes with no predefined list of variants. Although there are some commercial and open-source tools for clinically reporting genomics results for oncology testing, they often lack necessary features. METHODS Using several available software tools for data storage including MySQL and MongoDB, database querying with Python, and a web-based user application using JAVA and JAVA script, we have developed a tool to store and query complex genomics and demographics data, which can be manually curated and reported by the user. RESULTS We have developed a tool, Annotation SoftWare for Electronic Reporting (ANSWER), that can allow molecular pathologists to (1) filter variants to find those meeting quality control metrics in the genes that are clinically actionable by diagnosis; (2) visualize variants using data generated in the bioinformatics analysis; (3) create annotations that can be reused in future reports with association specific to the gene, variant, or diagnosis; (4) select variants and annotations that should be reported to match the details of the case; and (5) generate a report that includes demographics, reported variants, clinical actionability annotation, and references that can be exported into PDF or HL7 format, which can be electronically sent to an electronic health record. CONCLUSION ANSWER is a tool that can be installed locally and is designed to meet the clinical reporting needs of a clinical oncology NGS laboratory for reporting.

ON THE QUALITATIVE QUALITATIVE CHARACTERISTICS OF THE RESULT OF GROUPING ELECTRIC RADIO PRODUCTS INTO HOMOGENEOUS GROUPS

В работе представлен подход к определению меры однородности набора элементов - электрорадиоизделий, основанный на введении двух понятий: характеристики качества деления набора на группы и области качественного деления, как области значений характеристик качества деления, соответствующего разделению набора на однородные группы. This work presents an approach for determination of the homogeneity in a set of elements (semiconductor devices) based on the introducing two concepts: characteristic of the quality of dividing a set into groups and an area of qualitative division, as the range of values of characteristics of the quality of dividing, corresponding to dividing a set into homogeneous groups.

Basic principles of descriptive statistics in medical research

Descriptive statistics provides tools to explore, summarize and illustrate the research data. In this tutorial we discuss two main types of data - qualitative and quantitative variables, and the most common approaches to characterize data distribution numerically and graphically. This article presents two important sets of parameters - measures of the central tendency (mean, median and mode) and variation (standard deviation, quantiles) and suggests the most suitable conditions for their application. We explain the difference between the general population and random samples, that are usually analyzed in studies. The parameters which characterize the sample (for example, measures of the central tendency) are point estimates, that can differ from the respective parameters of the general population. We introduce the concept of confidence interval - the range of values, which likely includes the true value of the parameter for the general population. All concepts and definitions are illustrated with examples, which simulate the research data.

Computational Study Regarding CoxFe3−xO4 Ferrite Nanoparticles with Tunable Magnetic Properties in Superparamagnetic Hyperthermia for Effective Alternative Cancer Therapy

The efficacy in superparamagnetic hyperthermia (SPMHT) and its effectiveness in destroying tumors without affecting healthy tissues depend very much on the nanoparticles used. Considering the results previously obtained in SPMHT using magnetite and cobalt ferrite nanoparticles, in this paper we extend our study on CoxFe3−xO4 nanoparticles for x = 0–1 in order to be used in SPMHT due to the multiple benefits in alternative cancer therapy. Due to the possibility of tuning the basic observables/parameters in SPMHT in a wide range of values by changing the concentration of Co2+ ions in the range 0–1, the issue explored by us is a very good strategy for increasing the efficiency and effectiveness of magnetic hyperthermia of tumors and reducing the toxicity levels. In this paper we studied by computational simulation the influence of Co2+ ion concentration in a very wide range of values (x = 0–1) on the specific loss power (Ps) in SPMHT and the nanoparticle diameter (DM) which leads to the maximum specific loss power (PsM). We also determined the maximum specific loss power for the allowable biological limit (PsM)l which doesn’t affect healthy tissues, and how it influences the change in the concentration of Co2+ ions. Based on the results obtained, we established the values for concentrations (x), nanoparticle diameter (DM), amplitude (H) and frequency (f) of the magnetic field for which SPMHT with CoxFe3−xO4 nanoparticles can be applied under optimal conditions within the allowable biological range. The obtained results allow the obtaining a maximum efficacy in alternative and non-invasive tumor therapy for the practical implementation of SPMHT with CoxFe3−xO4 nanoparticles.

Study of the Optical, Electrical, Structural and Morphological Properties of Electrodeposited Lead Manganese Sulphide (PbMnS) Thin Film Semiconductors for Possible Device Applications

Semiconductor thin films of lead manganese sulphide (PbMnS) have been successfully deposited on florinated tin oxide (FTO) conductive glass substrate using an electrodeposition method. Lead acetate (Pb(CH3COO)2), manganese sulphate (MnSO4.H2O) and thiourea (CH4N2S) were the precursor used for cadmium (Cd2+), manganese (Mn2+) and sulphur (S2-) sources respectively. The concentration of manganese (Mn2+) was varied while keeping the concentrations of Pb2+ and S2- constant at 0.2 M and 0.1 M respectively. The deposited films were annealed at temperature of 250 oC and subjected for optical, electrical, structural and morphological characterizations. The results of the characterizations showed that the deposited thin films of PbMnS have high absorbance, high absorption coefficient throughout VIS and NIR regions. The band gap energy of the films is tuned to the order of 1.9 eV to 2.0 eV and tends to constant as concentration of Mn2+ increased. The electrical properties (electrical resistivity and conductivity) of the films are dependent on the concentration of Mn2+ and film thickness. The range of values of the electrical properties is found to be within the range of values for semiconductor materials. The XRD analysis revealed that the deposited thin films of PbMnS is crystalline but the crystallinity declined with increase in concentration of Mn2+. The SEM morphology showed that the surfaces of the films are highly homogeneous in nature and particle sizes are uniform on the substrate with the majority of the particles been spherical in shape. These observed properties exhibited by the deposited thin films of PbMnS make the films good materials for many optoelectronic and electronic applications such as solar cell, light emitting diode (LED), photodetector etc.

EVALUASI KERUSAKAN PERKERASAN LENTUR RUAS TOL JAKARTA-CIKAMPEK DAN ALTERNATIF PENANGANANNYA

The most common causes of road damage are the design life of the road that has been passed, waterlogging on the road due to poor drainage, or even traffic load which can cause the service life of the road to be shorter than planned. To find out the conditions on the Jakarta-Cikampek Toll Road. Calculates the value of road pavement conditions calculated using the Indeks Kondisi Perkerasan (IKP) on the Jakarta-Cikampek Toll Road. To find out what kind of treatment we should do for the damage that occurs. The Indeks Kondisi Perkerasan is a quantitative indicator of pavement conditions that has a range of values ranging from 0 – 100, with a value of 0 representing the worst pavement condition while 100 representing the best pavement condition. The IKP method has a level of handling type for each IKP value. According to the IKP guidelines, the type of handling that must be carried out with an average IKP value of 96,32 is routine maintenance. For further research, it’s necessary to conduct a direct survey, so that accurate results can be obtained. It is necessary to study with various methods to be able to compare the level of accuracy of a method. ABSTRAKPenyebab kerusakan jalan yang paling umum adalah umur rencana jalan yang telah dilewati, genangan air pada jalan yang diakibatkan drainase yang buruk, atau bahkan beban lalu lintas yang berlebihan yang dapat menyebabkan umur pakai jalan akan menjadi lebih pendek daripada perencanaannya. Untuk mengetahui kondisi pada jalan Tol Jakarta-Cikampek. Menghitung nilai kondisi perkerasan jalan jika dihitung dengan Indeks Kondisi Perkerasan (IKP) pada ruas Tol Jakarta-Cikampek. Untuk mengetahui penanganan seperti apa yang harus kita lakukan terhadap kerusakan yang terjadi. Kondisi Perkerasan atau IKP adalah indikator kuantitatif (numerik) kondisi perkerasan yang mempunyai rentang nilai mulai 0 – 100, dengan nilai 0 nya menyatakan kondisi perkerasan paling jelek sementara 100 menyatakan kondisi perkerasan terbaik. Metode IKP memiliki tingkat jenis penanganan tiap nilai IKP. Menurut pedoman IKP, jenis penanganan yang harus dilakukan dengan nilai IKP rata-rata 96,32 adalah pemeliharaan rutin. Untuk penelitian selanjutnya, perlu untuk survei secara langsung, supaya hasil yang didapat lebih maksimal. Perlu diteliti dengan metode yang beragam untuk dapat membandingkan tingkat keakuratan sebuah metode.

On elevating the reliability of the hygienic assessment of water quality of natural sources of drinking water supply

Introduction. As new toxic substances accumulate in water bodies, improving the reliability of the hygienic assessment of water quality is put forward in the first place. For the correct solution of this problem, it is relevant to use the direct comparison of deterministic quantities such as the maximum permissible concentration (MPC) of toxic pollutants with the result of its measurements (C) and methods of approach for evaluating the results of research. Material and methods. To improve the reliability of hygienic assessment of water quality in the proposed method tolerance control, envisaging the elucidation of the implementation type inequality and estimation of the probability of this event: where is the risk of false imprisonment. The number of concurrent measurements of water quality parameters guaranteeing an acceptable level of risk of error of research results is established by the authority of sanitary-epidemiological supervision, receiving a limited level of tolerable error taking into account the possibilities of metrological assurance of conformity assessment/quality of water and its normative level. Results. It is shown that in cases when the compliance of controlled safety indicators is evaluated, the values of which are limited on both sides, as is the case when studying the physiological usefulness of water, it is necessary to establish a two-way range of values of the permissible probability of violation of the specified requirements. Conclusion. First installed: the rule “if it is impossible to argue that controlled water quality indicators do not meet hygienic requirements. Thus requirements are met” is not equivalent to the law “if the indicators meet the requirements, then they can’t be inappropriate”, which more reliably indicates compliance with these requirements.

Maximisers for Strichartz inequalities on the torus

We study the existence of maximisers for a one-parameter family of Strichartz inequalities on the torus. In general, maximising sequences can fail to be precompact in L 2 ( T ) , and maximisers can fail to exist. We provide a sufficient condition for precompactness of maximising sequences (after translation in Fourier space), and verify the existence of maximisers for a range of values of the parameter. Maximisers for the Strichartz inequalities correspond to stable, periodic (in space and time) solutions of a model equation for optical pulses in a dispersion-managed fiber.