Profiles Of Various Types Research Articles

Differentiating anxiety profiles in medical students: a latent profile analysis

ABSTRACT Previous studies have confirmed a high prevalence of anxiety among medical students. The present study aimed to identify distinct medical student anxiety profiles to develop targeted interventions. A cross-sectional study was conducted with 735 medical students (346 males and 389 females) recruited voluntarily from mainland China. Latent profile analysis (LPA) was applied to explore profiles of various types of anxiety, including test anxiety, academic anxiety, social anxiety, career choice anxiety, general anxiety, and trait anxiety. The results showed that LPA yielded four profiles, comprising 17.14, 20.82, 21.50, and 40.54% of the sample respectively. Specifically, Class 1 (17.14%) showed the highest levels of multiple types of anxiety, particularly the highest level of general anxiety. Class 2 (20.82%) and Class 3 (21.50%) showed moderate levels of anxiety, but they displayed different patterns across various types of anxiety except for social anxiety. Class 4 (40.54%) displayed the lowest levels of anxiety across all types. These profiles differed in academic status and depression. Further, the multinomial logistic regression analysis showed that the high-anxiety group (Class 1) was more likely to be elder students, with lower sports frequency and a higher degree of self-handicapping. These results call for the need to move beyond linear relations among global constructs to address the complexity of anxiety coping and highlight the importance of customized intervention for these heterogeneous groups.

OVERVIEW OF CHANGES IN THE STRUCTURE OF ASSORTMENTS AND COSTS OF BUILDING PROFILES IN UKRAINE

Purpose. The main purpose of the publication is a qualitative and quantitative analysis of the changes associated with the implementation of new standards for rolled steel in recent years in the domestic regulatory framework. Also, an additional purpose is to estimate changes in the cost structure of certain types of rolled metal in Ukraine over the past 5 years. Methodology. In order to achieve the main purpose, both the rolled steel standards currently in force in Ukraine and the canceled previous standards were examined in detail. Comparison of standards for sheet profiles was carried out according to the criteria of the number of standard sizes and the profiles themselves in the standard. Comparison of standards for shaped profiles was carried out according to several criteria – the number of available standard sizes of profiles, the number of profiles themselves, the mass indicators of the largest and smallest profiles, as well as the efficiency indicators (nuclear distance and the square of the radius of inertia) of the largest and smallest profiles according to the standard. To assess changes in the cost structure of assortment profiles of various types, a quantitative comparison of their absolute and relative market value was carried out based on data from open electronic resources for the past 5 years. Findings. At present, in the part of standards for the range of steel products in Ukraine, a systematic and full-fledged update of the regulatory framework is taking place, with the full preservation of our own national heritage. The need to develop and implement a standard for flat hot-rolled broad-banded sheet, specialized and improved standards for hot-rolled bars and for cold-bent square and rectangular profiles, as well as the need to provide the official status of the standard for I-bars with parallel edges of the shelves are the main problematic issues in the part of the assortment normative base at the moment. Originality. In this publication, a theoretical estimation of modern changes in the current normative base of Ukraine, which regulates the issue of the range of steel rolled metal, is presented. In particular, 2 types of sheet metal, 5 types of shaped hot-rolled steel and 3 types of shaped cold-bent profiles, which are the most widely used for steel building structures, were analyzed. The main performance indicators of profiles according to old and new standards are calculated. Practical value. In the practical part of the completed review, changes in the cost structure of the main types of rolled steel over the past 5 years in Ukraine were estimated. The main problematic issues of the current assortment base of Ukraine are separately identified and practical recommendations for their elimination are provided.

A non-autonomous Gardner equation and its integrability: Solitons, positons and breathers

The work studies some integrable properties and soliton type solutions of a non-autonomous Gardner equation with damping and forcing terms. A bilinear form, a bilinear Bäcklund transformation and a Lax pair are derived for the considered Gardner equation explicitly. K-Soliton solution with proper existence condition, smooth positons, breathers and their interaction solutions are presented via the bilinear form. Moreover, the amplitude as well as velocity of the soliton solutions are derived, and a first-order breather solution and a second-order smooth positon are generated from the two-soliton solution. The interaction between a single-breather solution and the single-soliton solution and the interaction of a second-order smooth positon and the single-soliton solution are studied analytically, based on the three-soliton solution. Profiles of various types of the obtained solutions and their interactions are illustrated graphically.

Transition from undular jump to breaking jump

ABSTRACTIn the present study, a one-dimensional governing equation with a vertical acceleration term is used to analyse the free surface profile of various types of jumps. Initially, the surface profile of various types of jumps are reproduced analytically by using a suitable eddy diffusivity term. The approximations of the surface profile for various jumps are then verified numerically. Based on the comparisons, an empirical relationship between the Froude number and the turbulent diffusivity coefficient is established. The proposed empirical relationship is used in the governing equation to compute the various jumps, where an implicit two dimensional flow is assumed. The obtained results are compared with the experimental data to assure the transition of flow from undular jump to breaking jump. The comparisons of numerical results of wave profiles, pressure distribution, wave length and wave amplitude with the existing experimental data for various Froude numbers indicated the suitability of the proposed empirical relationship. Finally, the transitions of flow from undular jump to breaking hydraulic jump are discussed.

Who would continue to work from home in Hong Kong as the COVID-19 pandemic progresses?

This study aims a more thorough understanding of individuals' motivations and determinants of working from home (WFH) at various phases of the pandemic. To achieve this research goal, we analyze attitudes towards WFH, the profiles of various types of workers engaged in WFH, and the determinants of the current and future expected frequency of WFH among 816 workers in Hong Kong. We identify four types of teleworkers: (1) those with little employer support, (2) those distracted with tech problems, (3) those with good home office, and (4) those with substantial employer support. Separate latent-class choice models present that WFH frequencies in early phases of the pandemic (and at the moment), attitudes towards WFH, and certain constraining/facilitating factors affect the (expected) frequency of WFH. This study provides valuable insights into the types of teleworkers and the determinants of WFH, which will help policymakers create ways to encourage (or discourage) the future frequency of WFH.

Targeted and untargeted metabolomic analyses and biological activity of Tibetan tea

Tibetan tea is not only a national product of geographical identity, but also a traditional beverage inherits Chinese tradition. This study evaluated the metabolic profiles and biological activity in four Tibetan teas. 83 non-volatile metabolites were identified as differentially expressed metabolites, including amino acids and their derivatives, phenolic acids, flavonoids, nucleotides and their derivatives, terpenes, alkaloids, organic acids, lipids and others. CC and 131 were rich in terpenoids and lipids. MZ contained the highest contents of amino acids and their derivatives, phenolic acids and flavonoids. 26 key volatile compounds were considered as odor-active compounds. MZ showed the highest level of antioxidant and hypoglycemic activity. Statistics analysis indicated that polyphenols, flavonoids and catechins were significantly correlated (|r| ≥ 0.7, P < 0.05) with biological activities. This study indicated significant differences in the metabolic profiles of various types of Tibetan tea, which provided a clear database for quality detection of Tibetan tea.

Phase microscopy and surface profilometry by digital holography

Quantitative phase microscopy by digital holography is a good candidate for high-speed, high precision profilometry. Multi-wavelength optical phase unwrapping avoids difficulties of numerical unwrapping methods, and can generate surface topographic images with large axial range and high axial resolution. But the large axial range is accompanied by proportionately large noise. An iterative process utilizing holograms acquired with a series of wavelengths is shown to be effective in reducing the noise to a few micrometers even over the axial range of several millimeters. An alternate approach with shifting of illumination angle, instead of using multiple laser sources, provides multiple effective wavelengths from a single laser, greatly simplifying the system complexity and providing great flexibility in the wavelength selection. Experiments are performed demonstrating the basic processes of multi-wavelength digital holography (MWDH) and multi-angle digital holography (MADH). Example images are presented for surface profiles of various types of surface structures. The methods have potential for versatile, high performance surface profilometry, with compact optical system and straightforward processing algorithms.

129. Is it possible to recover from distal junctional kyphosis occurrence and reoperation?

<h3>BACKGROUND CONTEXT</h3> Distal junctional kyphosis (DJK) remains a primary concern for surgeons performing cervical deformity (CD) surgery. Postoperative complications from CD surgeries often render patients with worse recovery profiles which require reoperation. It is paramount to understand possible DJK recovery profiles for various types of surgical patients. <h3>PURPOSE</h3> Identify if DJK patients successfully recover from treatment/reoperation. <h3>STUDY DESIGN/SETTING</h3> Retrospective review of prospectively collected database. <h3>PATIENT SAMPLE</h3> This study included 145 cervical deformity (CD) patients with baseline and 1-year follow-up. <h3>OUTCOME MEASURES</h3> Complications;reoperations; HRQL, alignment. <h3>Methods</h3> CD patients(patients) were identified if they developed DJK. DJK angle (DJKA) was defined as >10° change in kyphosis between LIV and LIV-2 and a >10° index angle. Patients were stratified into two groups: 1) those who received a reoperation for DJK (Reop DJK) and those that did not have DJK (no DJK). Normalized HRQL scores at baseline and follow-up intervals (3 months, 6 months, 1 year, 2 years) were generated. Normalized HRQLs were plotted and area under the curve was calculated, generating one number describing overall recovery (Integrated Health State [IHS]). <h3>Results</h3> A total of 145 CD patients included. Of these patients, 32% developed DJK postop (56 years, 28.5kg/m2, 53% Female) with 12.8% of these cases being severe. By DJK occurrence: 24.2% within 3 months, 45.4% at 6 months, 31.4% by 1 year. Of these DJK patients, 25.5% received a reoperation. Upon presentation, Reop DJK patients had a worse PI-LL (-11.0 vs .11), worse NSR-Neck (8.7 vs 6.9), and a worse NDI (65.7 vs 53.9; all p<0.05). After receiving operation for their DJK, these patients displayed a worse pain recovery profile identified by their IHS-adjusted score when compared to No DJK patients for NRS-Neck between baseline to 3 months (19.7 vs 11.5; p<0.05). If these patients remain hyperkyphotic (T1-T12) postop, the IHS-adjust scores identified worse long-term recovery (3 months to 2 years) as identified by their EQ5D (52.5 vs 57.5; p<0.05). However, if reop DJK patients are matched according to their age-adjusted SVA (Lafage et al), they were identified to have better short-term recovery than DJK reop patients who were not matched by their NSR-Neck (7.0 vs 11; p<0.05) and then eventually normalizes with the latter's recovery course (p>0.05). Having DJK and not receiving a reop did not have much of an effect on recovery despite DJK angle, however; when compared to DJK reop, when nonop DJK angle was greater than 20°, the IHS-score mJOA adjusted resulted in greater long-term recovery (nonReop:59.9 vs Reop: 48.4; p<0.05). <h3>Conclusions</h3> Of the total DJK patients in this study, 25.5% received a reoperation. These patients had a worse pain recovery profile than non-DJK patients. However; when matched to their age-adjusted SVA, reop DJK patients were shown to have an improved short-term recovery than if they went unmatched according to their IHS-adjusted NSR-Neck. <h3>FDA DEVICE/DRUG STATUS</h3> This abstract does not discuss or include any applicable devices or drugs.

A Hybrid Energy System Workflow for Energy Portfolio Optimization

This manuscript develops a workflow, driven by data analytics algorithms, to support the optimization of the economic performance of an Integrated Energy System. The goal is to determine the optimum mix of capacities from a set of different energy producers (e.g., nuclear, gas, wind and solar). A stochastic-based optimizer is employed, based on Gaussian Process Modeling, which requires numerous samples for its training. Each sample represents a time series describing the demand, load, or other operational and economic profiles for various types of energy producers. These samples are synthetically generated using a reduced order modeling algorithm that reads a limited set of historical data, such as demand and load data from past years. Numerous data analysis methods are employed to construct the reduced order models, including, for example, the Auto Regressive Moving Average, Fourier series decomposition, and the peak detection algorithm. All these algorithms are designed to detrend the data and extract features that can be employed to generate synthetic time histories that preserve the statistical properties of the original limited historical data. The optimization cost function is based on an economic model that assesses the effective cost of energy based on two figures of merit: the specific cash flow stream for each energy producer and the total Net Present Value. An initial guess for the optimal capacities is obtained using the screening curve method. The results of the Gaussian Process model-based optimization are assessed using an exhaustive Monte Carlo search, with the results indicating reasonable optimization results. The workflow has been implemented inside the Idaho National Laboratory’s Risk Analysis and Virtual Environment (RAVEN) framework. The main contribution of this study addresses several challenges in the current optimization methods of the energy portfolios in IES: First, the feasibility of generating the synthetic time series of the periodic peak data; Second, the computational burden of the conventional stochastic optimization of the energy portfolio, associated with the need for repeated executions of system models; Third, the inadequacies of previous studies in terms of the comparisons of the impact of the economic parameters. The proposed workflow can provide a scientifically defendable strategy to support decision-making in the electricity market and to help energy distributors develop a better understanding of the performance of integrated energy systems.

Processing modes influence on the sensory profile of various types of coffee

Technological modes of coffee beans processing are constantly developing and improving, which raise the quality of the second most consumed drink in the world after water and meeting an increasingly demand. This paper describes various processing modes and their effect on the organoleptic properties of the coffee drink. The interrelation of climatic features of the raw material growing region, coffee processing and roasting modes, and storage conditions makes it possible to obtain a product with an individual taste profile.

CLINICO-PATHOLOGICAL STUDY OF SINONASAL MASSES

INTRODUCTION The nose is the most prominent part of the face with substantial aesthetic and functional significance. It is one of the few organs of body invested with an aura of emotional and cultural importance. Anatomical location of the nose and it passage have been regarded as the direct avenue to the brain, man’s source of intelligence and spirituality. AIMS AND OBJECTIVES To study the incidence, clinical presentation and pathological profile of various types of sinonasal masses at Tata Main Hospital, Jamshedpur, Jharkhand. To detect the variation of clinical presentation of sinonasal masses in relation to Age, Sex, Risk factors and Occupation, clinical presentation and the histopathological diagnosis of sinonasal masses. Compare the results of this study with the results of the previous workers. MATERIAL &amp; METHODS: This Prospective, observational study was done in the department of Otorhinolaryngology, Tata Main Hospital, Jamshedpur, Jharkhand. 90 patients presenting with the features of nasal obstruction, nasal discharge, headache, anosmia / hyposmia, epistaxis, facial deformity, ear &amp; eye symptoms will be evaluated by taking history and thorough ENT and head and neck examination(including nasal endoscopy) and subjecting them for the procedure. RESULT Out of 90 patients, 59(65.56%) were males and 31(34.44%) were females. In our study, among non neoplastic masses 34 were male and 26 were female. For non-neoplastic lesions the average age of presentation was 36.2 years. Mean age of presentation was 37.21 years. CONCLUSION Emergence of newer surgical, medical and radiological intervention have open up a new chapter with these type of patients. . Awareness regarding the disease process and health education should be provided to people regarding smoking, maintenance of hygienic condition and utilization of health facilities.

Image-Based Measurement of Wave Interactions with Rubble Mound Breakwaters

Over the past decade, the use of imaging devices to perform quantitative measurements has seen wide-scale adoption and has become integral to the emerging fields of research, such as computer vision and artificial intelligence. Recent studies, published across a wide variety of fields, have demonstrated a vast number of ways through which image-based measurement systems can be used in their respective fields. A growing number of studies have demonstrated applications in coastal and ocean research. Edge detection methods have been used to measure water surface and bedform elevation from recorded video taken during wave flume experiments. The turbulent mixing of air and water, induced by the breaking waves and the runup processes, poses a particular problem for the edge-detection methods, since they rely on a sharp contrast between air and water. In this paper, an alternative method for tracking water surface, based on color segmentation, is presented. A set of experiments were conducted whereby the proposed method was used to detect water surface profiles for various types of breaking waves interacting with a rubble mound breakwater. The results were further processed to compute the surface velocity during runup. The time-history of surface velocity is shown to closely parallel the point measurements taken nearby the instrumented armor unit. These velocities can potentially serve as boundary conditions for determining the dynamic loads exerted on the armour units. Further, the image processing results are used to remove the time-varying buoyant force from the measured force acting on an individual armour unit, providing additional insight into how the forces develop over time.

The Use of Hybrid Energy Storage Devices for Balancing the Electricity Load Profile of Enterprises

In this article, the authors consider the possibility of using a hybrid energy storage system to even out the load profile of the enterprise. Solving the problem of rational use of energy storage taking into account the initial variable load schedule will significantly reduce not only the cost of electricity consumption by the enterprise, but also the costs of its production. Detailed characteristics of batteries with various types of electrolytes and supercapacitors are given. A model of the active scheme of a hybrid electric energy storage system consisting of a lithium-ion battery and a supercapacitor unit with the corresponding characteristics is presented. The model was carried out by using the SimPowerSystems software in MatLab. During the simulation, the temperature and the aging effects and of the batteries were not taken into account. The selfdischarge parameter of the battery was also not presented. As a result of the simulation, discharge characteristics of supercapacitors and batteries were obtained based upon which the expediency of their combined use for leveling load profiles of various types was substantiated. The paper presents the results of the simulation of operating modes of a hybrid energy storage device, combining the advantages of two types of energy storage devices, as well as a diagram of delivered power to the network, corresponding to the specified parameters. The paper provides a mathematical description of the increasing power by hybrid storage system resulting from the combined use of supercapacitors and batteries. The paper presents the dependence of the power increase ratio on the frequency and the pulse current duty ratio, which proves that the maximum possible output power of the hybrid storage system can be several times greater than the power of a single battery having the same parameters.

Mass Spectrometry Imaging Enables Discrimination of Renal Oncocytoma from Renal Cell Cancer Subtypes and Normal Kidney Tissues

Precise diagnosis and subtyping of kidney tumors are imperative to optimize and personalize treatment decision for patients. Patients with the most common benign renal tumor, renal oncocytomas, may be overtreated with surgical resection because of limited preoperative diagnostic methods that can accurately identify the benign condition with certainty. In this study, desorption electrospray ionization (DESI)-mass spectrometry (MS) imaging was applied to study the metabolic and lipid profiles of various types of renal tissues, including normal kidney, renal oncocytoma, and renal cell carcinomas (RCC). A total of 73,992 mass spectra from 71 patient samples were obtained and used to build predictive models using the least absolute shrinkage and selection operator (Lasso). Overall accuracies of 99.47% per pixel and 100% per patient for prediction of the three tissue types were achieved. In particular, renal oncocytoma and chromophobe RCC, which present the most significant morphologic overlap and are sometimes indistinguishable using histology alone, were also investigated and the predictive models built yielded 100% accuracy in discriminating these tumor types. Discrimination of three subtypes of RCC was also achieved on the basis of DESI-MS imaging data. Importantly, several small metabolites and lipids species were identified as characteristic of individual tissue types and chemically characterized using tandem MS and high mass accuracy measurements. Collectively, our study shows that the metabolic data acquired by DESI-MS imaging in conjunction with statistical modeling allows discrimination of renal tumors and thus has the potential to be used in the clinical setting to improve treatment of patients with kidney tumor. SIGNIFICANCE: Metabolic data acquired by mass spectrometry imaging in conjunction with statistical modeling allows discrimination of renal tumors and has the potential to be used in the clinic to improve treatment of patients.

BIOINDICATION IN ECOLOGICAL ASSESSMENT OF ERODED SOILS IN MOUNTAIN AREAS

In the article it is provided a material on determination of quantitative and qualitative composition, as well as invertebrates’ distribution in the profile of various types of the eroded mountain soils; on determination of regional regularities of alterations in the morphogenetic structure, agrochemical and agrophysical indicators of eroded mountain and foothill (typical sierozem soils, dark sierozem soils, mountain brown carbonate, mountain brown typical, mountain brown weakly leached) soils; on determination of the correlative relationship between soil fauna (earthworms, mollusks, nematodes, ticks, collembolans) and soil properties.

Clinical profile of tuberculosis in children

Aim: The study aimed to describe the clinical profile tuberculosis (TB) in children at various ages. Materials and Methods: Clinical profile of various types of TB and factors associated with them was compared. Results: A total of 135 children were diagnosed with TB in the study period. The mean age of the presentation was 5.3 ± 3.5 years. Common clinical features at presentation included fever in 112 (83%), cough in 63 (46.7%), and loss of appetite in 51 (37.8%). On biochemical evaluation, 72 (74.22%) of 97 records showed raised erythrocyte sedimentation rate (ESR) levels. One hundred and twenty-one (89.6%) children had received Bacille Calmette–Guerin (BCG) vaccination, 44 (32.6%) were found to be tuberculin skin test (TST) positive, and 58 (43%) were malnourished. On diagnosis, pulmonary TB was seen in 49 patients (36.3%), neuro TB in 20 (14.8%), TB lymphadenopathy in 12 (8.9%), abdominal TB, TB serositis and latent TB in 11 cases (8.2%) each, musculoskeletal involvement in 8 (5.9%) cases, and 6 (4.4%) showed disseminated form. The rest two of them were diagnosed with BCGosis and atypical mycobacterium infection. On statistical analysis, it was found that fever (P = 0.002) and raised ESR (P = 0.045) were least common in abdominal TB and disseminated TB, whereas loss of appetite was more common in disseminated TB and least in abdominal TB (P = 0.02). Conclusion: Pulmonary TB is the most common type of TB in children with boys more affected as compared to girls. TST is positive in less than half of the children with TB. Fever is the most common symptom of TB in children. In abdominal TB and disseminated TB, ESR was normal, and fever was absent. Loss of appetite is commonly seen in disseminated TB.

Diameter-Dependent Degradation of 11 Types of Carbon Nanotubes: Safety Implications

Understanding the biodegradation profiles of various types of carbon nanotubes (CNTs) is important for their safe use according to their structural characteristics. To investigate the relationship between the biodegradation and the physicochemical properties of CNTs, sodium hypochlorite was used to degrade CNTs because it is believed to be a key oxidizer of CNTs inside macrophages and neutrophils. The complete degradation of CNTs in response to sodium hypochlorite was confirmed, and the half-lives of 11 different types of commercially available single-wall CNTs (SWNTs), carbon nanohorns (CNHs), and multiwall CNTs (MWNTs) in sodium hypochlorite were determined. The degradation of CNTs generally correlated with diameter, as follows: SWNTs ≥ CNHs > thinner MWNTs > thicker MWNTs. In addition, defects and the degree of dispersion also affected the degradation rate, but these were not the primary factors determining CNT degradation.

Incidence of dengue fever and its clinical profile during an outbreak in a rural area in Tamil Nadu

Background: In Southeast Asian countries, dengue is the major cause of pediatric morbidity and mortality and in that India reports the maximum number of cases. The annual incidence of dengue in India ranges from 8 to 33 million cases per year and an increased risk of dengue virus infection in children older than 5 years of age have been documented. Aim: The main objective of this study was to assess the incidence of dengue among the fever cases and to assess the clinical profile of various types of dengue fever and also to assess the predictive variables for the severity of dengue and their clinical outcomes. Methodology: A prospective longitudinal study was conducted at a pediatric hospital in a rural area of Tamil Nadu for a period of 6 months. A total of 325 patients were included in the study based on the study period and the inclusion criteria. For all the cases that were having a fever, basic blood investigations which includes hemoglobin, total count, and platelet count were performed along with peripheral smear study for malaria, dengue card test, and liver function test. Further, dengue positive patients were grouped into non-severe and severe dengue fever based on the operational definition formulated by the WHO. Results: The overall incidence of dengue among all the patients with fever was 71.3% among which 83.6% were non-severe dengue and the remaining 13.6% of the patients had severe dengue. Clinical signs such as palmar erythema, splenomegaly, and bleeding manifestations were more common in severe dengue patients than that of non-severe dengue, and this difference was found to be statistically significant. Hemoglobin and platelet count was found to be much lower among the patients with severe dengue along with raised liver enzymes (serum glutamic-oxaloacetic transaminase and serum glutamic pyruvic transaminase) than that of the non-severe dengue, and the difference was found to be statistically significant. Majority of the patients with severe dengue received crystalloid and few patients received blood products whereas only very few with non-severe dengue received crystalloids, and none of the patients in this group received blood products. Conclusion: Health-care personnel of all levels must be made aware of the clinical signs and symptoms of all dengue types. Early recognition, precise assessment and appropriate treatment with the help of the WHO revised classification and management guidelines would reduce the mortality due to dengue fever.

АЕРОДИНАМІЧНІ ХАРАКТЕРИСТИКИ РОТОРІВ ВЕУ ГОРИЗОНТАЛЬНО-ОСЬОВОГО ТИПУ ДЛЯ АВТОНОМНИХ СИСТЕМ ВУЛИЧНОГО ОСВІТЛЕННЯ

In this paper, we consider the aerodynamic characteristics of profiles used in rotors of horizontal-axis wind turbines for autonomous street lighting systems. For the analysis of the characteristics, five basic aerodynamic profiles of various types were selected: NACA 0018, CLARK-Y-15, NAVY-N-60, EXPLER 1211, GOE 217. Based on the analysis of the selected profiles, aerodynamic calculations were made, and also a calculation was made the geometrical parameters of the blades of the rotors of wind power plants with their subsequent processing and analysis obtained design data under specified conditions. These conditions were taken on the basis of detailed processing and subsequent analysis of the data obtained on the distribution of the speed of wind flow in various territories of Ukraine. Taking into account the selected power characteristics, various types of wind power plants were analyzed, after which it was decided to use horizontal axial-type wind turbines, as this type of wind power plants has the most suitable characteristics to solve the research problem. With the help of a number of mathematical transformations, dependences of lift coefficients and resistance force were established depending on the angle of attack. It was also necessary to make changes in the angles of the profile in the section of the blade in order to improve the conversion coefficient of the wind flow incident on the blades of the wind power plant. As a result, the calculated values of wind turbine diameters were obtained and analyzed for each existing profile separately, in addition, a comparative analysis of the main energy characteristics of wind energy rotors was carried out, which is clearly represented as a dependence of the power factor and moment ratio depending on the speed ratio. In the course of the analysis, aerodynamic profiles with the best weight and size and energy characteristics, capable of maximizing the use of wind flows that prevail in most of the territory of Ukraine, were identified.

Investigation of the aroma of commercial peach (Prunus persica L. Batsch) types by Proton Transfer Reaction–Mass Spectrometry (PTR-MS) and sensory analysis

The aim of this study was to investigate the aroma and sensory profiles of various types of peaches (Prunus persica L. Batsch.). Forty-three commercial cultivars comprising peaches, flat peaches, nectarines, and canning peaches (pavías) were grown over two consecutive harvest years. Fruits were assessed for chemical aroma and sensory profiles. Chemical aroma profile was obtained by proton transfer reaction-mass spectrometry (PTR-MS) and spectral masses were tentatively identified with PTR-Time of Flight-MS (PTR-Tof-MS). Sensory analysis was performed at commercial maturity considering seven aroma/flavor attributes. The four types of peaches showed both distinct chemical aroma and sensory profiles. Flat peaches and canning peaches showed most distinct patterns according to discriminant analysis. The sensory data were related to the volatile compounds by partial least square regression. γ-Hexalactone, γ-octalactone, hotrienol, acetic acid and ethyl acetate correlated positively, and benzeneacetaldehyde, trimethylbenzene and acetaldehyde negatively to the intensities of aroma and ripe fruit sensory scores.