bluuebunny/crossref_metadata_2025 huggingface dataset:
CHEMICAL AND PHYSICAL ANALYSIS OF SANDSTONE ROCK FROM BOTUCATU FORMATION
Authors: Correa João Carlos , Cavallaro Francisco Assis , Garcia Rafael H. L. , Santos Rodrigo Sousa , Amade Rafael Aquino , Bernardes Thiago Lynyker da Silva , Velo Alexandre França , Mesquita Carlos Henrique , Hamada Margarida Mizue
Published: April 2021

The productive capacity of the Guarani Aquifer System is subject to variations along its length, due to its complex structural and compositional heterogeneity. Several parameters may influence the quality of this reservoir rock, such as its mineralogical and textural constitution, as well as the physicochemical processes, since its diagenesis is not the same throughout the aquifer, influencing the water productivity in wells in different locations. Such parameters are useful in the geoscience studies for the elaboration of diagenetic models for the prediction of the reservoir quality. In this work, several properties of the sandstone rock from Botucatu Formation were determined using different techniques, such as geotechnical tests, optical microscopy (MO), electron scanning microscopy (SEM), X-ray Fluorescence and X-ray diffraction. The results indicate that the studied sandstones have characteristics of the reservoir rocks, with potential for water storage.
Spatial resolution of a preclinical PET tomograph
Authors: Souza Guilherme Cavalcante de Albuquerque , Gontijo Rodrigo Modesto Gadelha , Silva Juliana Batista da , Mamede Marcelo , Ferreira Andréa Vidal
Published: April 2021

Positron emission tomography (PET) is an important molecular image modality and its application on preclinical research has increased during last decades. Thus, in laboratory practice, it is important to implement a quality control of the equipment, since intrinsic factors influence the image quality. The objective of this work was to perform and implement spatial resolution tests for the small animal PET scanner of the Molecular Imaging Laboratory, LIM/CDTN. Empirically, spatial resolution of a PET scanner can be determined from the measurement of point or linear sources and FWHM (full width half maximum) analysis of the respective linear profiles. In this work, a point source of 22Na and a hot rod style phantom filled with 18F-FDG solution were used. Acquisition and reconstruction of images were performed with the LabPET 1.12.1 software, provided by the equipment manufacturer. Image reconstruction parameters followed the LIM standard protocol: MLEM-3D algorithm, 20 iterations, no high resolution mode, no attenuation or scatter corrections, no post-filtering. PeakFit® and Amide softwares were used to perform images post-processing. The results indicate that the scanner has an adequate spatial resolution and its value is compatible with values reported in international studies performed on similar equipments.
Anisotropy function of a new 192-Ir brachytherapy source
Authors: Abreu Rodrigo Teixeira , Angelocci Lucas V. , Nogueira Beatriz R. , Santos Hamona N. , Zeitune Carlos Alberto , Rostelato Maria Elisa C. M.
Published: April 2021

Brachytherapy is a type of radiotherapy that uses radioactive sources (seeds, wires, among others) close to the tumor. Is important to provide a detailed description of seed dosimetry, so only the tumor will be irradiated avoiding unnecessary dose on adjacent organs and structures. To evaluate the dosimetric parameter of the anisotropy function for a new brachytherapy source, this work proposes the use of microcube TLD-100 dosimeters to find the dose rate using the AAPM Task Group 43 protocol (TG-43). The anisotropy function represents dose distribution around the source and has a major role for characterization of a new iridium source being implemented in Brazil. The value of D(r,θ) was measured using Solid Water phantoms, r value being the distance from the geometric center of the source to the position of the dosimeter on the phantom, and θ being the angle formed between the longitudinal axis of the source and the line connecting the geometric center to the TLD. Monte Carlo calculations were performed to evaluate the anisotropy function to validate the experimental measurements. For each distance value (r), an anisotropy function was plotted (1.0, 2.0, 3.0, 4.0, 5.0, and 10.0 cm). The results obtained with Monte Carlo calculations agreed ±2% with the experimental values for r greater than 3.0 cm, so these results show a good distribution of dose around the seed considering the high energy of 192-Ir (average of 380 KeV) and encapsulation thickness.
Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System
Authors: Koskinas Marina Fallone , Koskinas Marina Fallone , Kuznetsova Maria , Moreira Denise  Moreira S. , Shoueri Roberto M. , Yamazaki Ione M. , Morais Thales S. L. , Semmler Renato , Dias Mauro S.
Published: April 2021

The preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System developed by the Nuclear Metrology Laboratory (LMN) at IPEN, is presented. The TDCR system makes use of three photomultipliers positioned at 120° relative angle, operating in coincidence. For this preliminarymeasurement, 14C was selected to be standardized; 14C was chosen due to be a pure beta emitter with low end-point energy of 156 keV, which is suitable to be measured by the TDCR system. This solution was previously calibrated by the efficiency tracing technique using a 4p(PC)b-g coincidence system, employing 60Co as a tracer. The activity of the 14C solution by efficiency tracing technique was determined by using the extrapolation technique, changing the beta efficiency by pulse height discrimination. In order to determine the final activity, a Monte Carlo simulation was used to generate the extrapolation curve. The Software Coincidence System (SCS) developed by the LMN was used for both systems to register the events. MICELLE 2 code was used to calculate the theoretical TDCR efficiency. Measurements using HIDEX, a commercial liquid scintillator system, were also carried out and the results from the three methods were compared, showing a good agreement.
Study of a mixture of soil and brazilian bentonite using a protocol for clay characterization for near-surface radioactive waste repository
Authors: Barroso Samara Alves , De Tello Clédola Cássia Oliveira
Published: April 2021

Aiming to implement the Brazilian repository for disposal of low and intermediate level of radioactive wastes, the “Project RBMN” is being coordinated by CNEN. The repository is made of multiple barriers in order to prevent or retain the migration of radionuclides throughout these paths to the environment. Clays are used as backfill and coverage layers, which are the repository natural barriers. Recently, in Nuclear Technology Development Center (CDTN) a protocol for clay characterization was elaborated, and it was used the Brazilian bentonite as a reference. In this protocol are established some physical and chemical tests and their reference values that are essential for the characterization of materials to be used as backfill and coverage layers in the surface repository. This research intended to evaluate the applicability of this protocol to characterize soil without and with bentonite. The bentonite content added to the soil was 30%. The results were compared with the reference values of the protocol and literature for materials with similar mineralogical features. The results showed an increase of the specific surface and of the cation exchange capacity, as the result of the bentonite addition. The hydraulic conductivity is significant decreased by the addition of bentonite.
Performance of the X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and the industrial computed tomography used for characterization of the vesicular volcanic rock.
Authors: Santos Rodrigo Silva , Cavallaro Francisco Assis , Bernardes Thiago Lynyker da Silva , Amadeu Rafael Aquino , Garcia Rafael H. L. , Velo Alexandre França , Mesquita Carlos Henrique , Hamada Margarida Mizue
Published: April 2021

Volcanic rock is a designation in geology given to extrusive igneous rocks. One type of igneous rock of interest, in economic terms, is vesicular, since, besides the knowledge of the morphology (positioning, size, direction, and interconnectivity of the vesicles) of these structures within the spill, there is also an economic interest regarding the possibility of this rock as a reservoir of fluids (water and hydrocarbons). In this work, samples of vesicular volcanic rock from the Paraná Basin were studied for their characterization, aiming to contribute to the knowledge of this rock proprieties as a reservoir of fluids. The elements present inside the rocks were identified and quantified by X-ray fluorescence and X-ray diffraction. The dimensions of the vesicles and the interconnection between them could be clearly observed in the reconstructed images of the rocks measured by the third generation gamma-ray industrial tomography technique.
Inorganic Chemical Composition by X-Ray Fluorescence Spectrometry of the Mineral Waters from the Minas Gerais Water Circuit, Brazil
Authors: Damatto Sandra Regina
Published: April 2021

The water parks located in the cities of Cambuquira, Caxambu, Conceição do Rio Verde, Lambari and Marimbeiro are part of the Water Circuit of Minas Gerais and have their mineral waters regularly consumed by the local population and tourists motivated by the medicinal use of these waters, characterized as mineral waters. Therefore, the objective of this work was to determine the inorganic chemical composition of the mineral water from these parks, analysing the elements Ag, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K. Mn, Ni, Pb, Se, Ti, V and Zn using the energy dispersive X-ray fluorescence – EDXRF. Despite the proximity to one another, each park has different chemical elements and concentrations. The elements presenting the highest concentrations were the major elements Ca, Fe, K and Mn. However, among the five water parks studied, the Water Park of Caxambu presented the highest concentrations for all the determined elements.
Calibration of Solid State Nuclear Track Detectors CR-39 for radon study in a high concentration underground mines
Authors: Takahashi Laura , Santos Talita , Correa Bárbara , Pinheiro Rose Mary , Menezes Maria Ângela , Rocha Zildete
Published: April 2021

The Brazilian National Commission for Nuclear Energy (CNEN) establishes a reference level of 1000 Bq m-3 of radon concentration in underground mines. Solid State Nuclear Track Detectors – SSNTD is considered the main method of analysis in radon research. The methods and instrumentation used to determine radon concentration needs to be validated by calibration to ensure reliable results. This work aims to determine the calibration factor of CR-39 detectors exposed to well known radon concentrations produced in closed systems by sources of Ra-226 with activities of 3.379 kBq and 0.483 kBq, which are NISTS sources of activities and emanation factors. The detectors were exposed to six different levels of exposure. The conversion factor between tracks density and exposure obtained was K = 52.028 ± 0.752 [(tracks density.cm-2)/(kBq.d.m-3)]. As object of application of this work, mines were chosen with high radon concentrations reported by Santos (2015) in special a pegmatite mine located in the northwest of Minas Gerais. This mine presented radon concentration much higher than the recommended by the Brazilian national standard NN.CNEN.4.01, up to 7384 ± 517 Bq m-3.
The influence of generator eluate in radiolabeling PSMA-11 kit with 68Ga
Authors: Vivaldini Bianca Franchesqueti , De Araújo Elaine Bortoleti
Published: April 2021

Gaining prominence in clinical practice, the 68Ga, positron emitter radionuclide easily obtained by 68Ge/68Ga generator elution, has shown potential and excellent quality on radiolabeling of peptide for use in positron emission tomography (PET), in particular urea-based inhibitor peptides, directed to the prostate-specific membrane receptor (PSMA). Previous studies with the PSMA linked to the chelator HBED-CC (PSMA-11) radiolabeled with 68Ga showed high contrast PET/CT images to evaluate recurrence and metastasis of prostate cancer, becoming an important imaging agent in the clinical routine. This work intended to evaluate the influence of the quality of the 68Ge/68Ga generator eluate in direct labelling of PSMA-11 with 68Ga, assisting in the development of kit for prompt radiolabeling. It was evaluated the 68GaCl3 eluate from 68Ge/68Ga non-GMP generator (manufacturer A) and 68Ge/68Ga GMP generator (manufacturer B), both commercially available. To evaluate the influence of  the 68Ga eluate on radiochemical yield of the preparations,  the radiochemical purity was determined by thin layer chromatography and HPLC. The radiolabeling with non-GMP generator eluate was made with and without preliminary purification of the 68 gallium chloride eluate, employing cationic purification columns. The results showed higher radiochemical yield with the 68GaCl3 eluate from the 68Ge/68Ga GMP generator, obtaining the radiolabeled product more easily and speed to clinical practice, without preliminary purification, as opposed to the use of non-GMP 68Ge/68Ga generator which required preliminary purification of the 68GaCl3 eluate to promote satisfactory radiochemical purity results.
Procedure to optimize the solid angle for the colimation of the nai detector used to measure the flow rate in pipelines
Authors: Santos Raphael Francisco Gomes , Brandão Luis Eduardo Barreira , Domingues Alessandro Mariano , Filho Julio Dualibi
Published: April 2021

The use of radiotracers of product flow ducts from the oil and gas industry allows checking of installed flow meters and knowledge of the flow profile within the duct. The time transient method is older for the flow media and gauging of the flowmeters and lower permanence of the radioactive magazine at two different points. For the oil and gas industry, it is important that there is an average rate of 0.7%, so that this value is reached by a level of necessary care. One of the points is a correct detector / duct geometry at the two measurement points because the quality of the contents depends on the passage across a straight section of the radioactive duct. The present work has the purpose of analyzing the collimation effect of the detector signal during radiotracer during flow in a steel duct using  Au198 as the radiotracer. The analysis was carried out using computer simulation using the computational code Microshield, simulating the entire face detector / shielding / collimation system of the NaI detector 2x2" and the fluid being used in conjunction with the system Glycerol in regime of turbulent flow. The study is found in the same way as the radio of the detector in the same distance of the radio reserve from the radio in the entrance to the standard of the ANP.
Monitoring of atmospheric emission of alpha emitters radionuclides at a nuclear fuel cycle facility in RJ, Brazil
Authors: Pereira Wagner De Souza , Lopes José Marques , Do Carmo Alessander sá , Campelo Emanuele L. C. , Kelecoml Alphonse , Da Silva Ademir Xavier
Published: April 2021

The Indústrias Nucleares do Brasil S/A (INB) in Resende, state of Rio de Janeiro, operate with open sources containing alpha emitters. This operation produces particulate material in the air. To reduce this impact, the plant operates with negative pressure using an exhaust equipment. Exhaust air is sent to an absolute filter system. In the exhaust stack, there is an alpha emitter detection module that operates monitoring the releases. Following the dose calculation model established by the National Commission for Nuclear Energy (CNEN), the authorized limit is fixed at 1.2∙107 Bq.y-1 of alpha emitters by Nuclear Fuel Factory (FCN). The present work aims to evaluate the alpha-emitting radionuclides released by FCN in terms of total release (Bq) and activity concentration (AC, Bq∙m-3). In 2018, FCN released 1.41∙106 Bq.y-1(i.e. 34% of the 2016 releases). The largest mean for AC was 2.04 mBq∙m-3. The release data was almost an order of magnitude lower than the annual release limit, proving the adequation of the atmospheric effluents to the licensing requirements.
Convergence between the study of ecosystem services and nuclear technology – a necessary approach
Authors: Rodrigues Elaine Aparecida , Aquino Afonso Rodrigues , De Carvalho Amanda Rodrigues
Published: April 2021

If in the 19th century scientific knowledge moved from a generalist perspective to a growing specialization, in recent decades, problems that transcend disciplinary and political boundaries have required solutions based on interdisciplinary research and global actions, which led to the establishment of the Sustainable Development Goals (SDGs). Viewing from the latter perspective, the study of ecosystem services has converged on a fast-growing, transdisciplinary area of knowledge, at the same time that the advances in the nuclear field have enabled applications in industry, health, agriculture and the environment. Considering the development of these two areas of knowledge, the objective of this study is to evaluate the correlation between Ecosystem Services (ES) and Nuclear Science and Technology (NST), by means of category building and content analysis applied to articles compiled from Web of Science. From 1980 to June 2020, 27,301 records (articles and reviews) were listed for the term “Ecosystem Service*”. When refining the result with the application of descriptors related to the nuclear field, correspondences were found for “Uranium”=14; “Nuclear Power”=6; “Nuclear Energy”=3; “Nuclear Technology*”=1; “Nuclear Fuel*”=1; “Nuclear Material*”=1; “Radiation”=7; “Isotope*”=188, totalizing 221 correspondences. On the other hand, 9,949 records were obtained for the same time interval, when using the descriptors for the nuclear field, plus the terms “Nature” or “Ecosystem*” or “Environment”. Despite attesting that NST truly converges on ES, this correlation needs to be made more explicit in ES studies, in order to expand the perspectives for the conservation, preservation and recovery of the ecosystem services and their contribution to human well-being.
Application of ionizing radiation in the “licuri” (Syagrus coronata (Mart.)) as phytosanitary treatment of the Pachymerus nucleorum beetle (Fabricius, 1792)
Authors: Nogueira Alexandra Gonçalves , Negrao Bianca Guimaraes , Arthur Valter , Villavicencio Anna Lucia Casañas Haasis
Published: April 2021

Pachymerus nucleorum (Fabricius, 1792), is a pest of economic importance it causes direct damages to the “licuri” almonds. The objective of this study was to determine the lethal doses of gamma radiation for stages egg, larvae, and pupae of this insect as a phytosanitary treatment in “licuri”. The samples were irradiated in a Cobalt 60 irradiator, Gammacell-220 type, installed at the Institute of Energy and Nuclear Research - IPEN / CNEN at a dose rate of 748 Gy / h. Each treatment consisted of 3 replicates, so 180 licuri were irradiated in the doses of 50, 75, 100, and 125 Gy. After irradiation, the samples were stored at a temperature of 25 ± 5°C and relative humidity of 70 ± 5%. The evaluation of the fruits was performed by the emergence of insects. It is concluded that the dose of 125 Gy was sufficient to inhibit the development of insect life stages. Therefore, this dose of radiation can be used for control of the immature stages of the P. nucleorum.
Analysis of carotenoids in edible flowers of Dianthus chinensis processed by ionizing radiation
Authors: Koike Amanda Cristina Ramos , Araújo Elias Silva , Negrão Bianca Guimarães , Almeida-Murandian Ligia Bicudo de , Villavicencio Anna Lucia Casañas Haasis
Published: April 2021

The tendency to use edible flowers in gastronomy to add beauty, color, and flavor in food preparation has been increasing in recent years. Several species have active biological substances, which play an important role in health maintenance. This highly perishable food should be grown without the use of pesticides. Thus, several methods are applied to increase the shelf life of food products, as well as ensure their quality and safety. Among the treatments, the food irradiation process has proven to be an effective tool in preserving and extending the shelf life of the perishable product. Dianthus chinensis flowers, popularly known as chinese pink (cravina), belongs to the family Caryophyllaceae, are native to Asia and Europe, are widely used in culinary preparations, is also acknowledged for their bioactive components and antioxidant properties. The purpose of this study was to evaluate carotenoids in D. chinensis flowers submitted to gamma irradiation and electron beam doses of 0.5, 0.8, and 1.0 kGy. High performance liquid chromatography was used to carotenoids determination. In the specie of edible flowers analyzed it was found carotenoid lutein (4.02 to x 7.52 mg/ 100 g). In general, the lutein was higher for irradiated samples, especially those treated with 0.8 and 1.0 kGy independently of irradiation technology. Accordingly, the applied irradiation treatments seemed to represent a feasible technology to preserve the quality of edible flower petals.
Atypical presentation of immune thrombocytopenia (ITP) with multiple somatic complaints without bleeding manifestations
Authors: Gupta Bhavna
Published: April 2021

Immune Thrombocytopenia (ITP) is a hematologic disorder characterized by immune mediated destruction of platelets leading to isolated thrombocytopenia. It presents as sudden onset of acute self-limiting episodes of bleeds which are usually minor but may present with intracranial hemorrhage. ITP is a clinical diagnosis of exclusion. No confirmatory diagnostic tests are available. Management depends on severity of bleeding rather than platelet counts. Here is a case report of a 16 years old female patient presenting with multiple somatic complaints and no history of bleeding manifestations with isolated thrombocytopenia and hematologic malignancy ruled out.
Географiчний партеногенез на прикладі видових угруповань дощових червів (Oligochaeta, Lumbricidae) відкритих ландшафтів України
Authors: Межжерін С.В. , Чайка Ю.Ю. , Попов В.В. , Власенко Р.П. , Жалай О.І. , Гарбар О.В.
Published: April 2021

Угруповання дощових червів відкритих ландшафтів України виявляють географічну неоднорідність, по в’я- зану з видоспецифічними особливостями розмноження видів, що до них належать. Якщо в північно-західних областях України переважають амфіміктичні види, то в східних і південних домінують партеногенетич- ні. Альтернативний характер поширення партеногенетичних й амфіміктичних видів у напрямку з північ- ного заходу на південний схід підтверджено кореляційним аналізом. Також виявлено негативну залежність між видовим різноманіттям угруповання на регіональному рівні та представленістю в ньому партеноге- нетичних дощових червів. Переважання партеногенетичних видів в областях із сухим і континентальним кліматом та збідненим видовим складом дає підставу вважати адекватним застосування концепції географічного партеногенезу щодо закономірностей поширення амфіміктичних і партеногенетичних видів дощових червів. При цьому немає підстав вважати партеногенетичних люмбрицид екстремофілами, в да- ній ситуації більш точним буде їх віднесення до високотолерантних організмів.
ПАМ’ЯТЬ СПАЛЬНОГО МІКРОРАЙОНУ: (НЕ) ДЛЯ ТУРИСТІВ
Authors: Петренко-Лисак Алла
Published: April 2021

Стаття містить аналіз спального мікрорайону з позиції перспектив його трансформацій, як у минулому, так і в майбутньому. Звернуто увагу на спальні мікрорайони передусім пострадянських міст. Це явище розглянуто з економічного, культурного та просторового поглядів у контексті формування пам’яті про місце в місті та в повсякденному житті окремого соціального суб’єкта – мешканця мікрорайону в його біографічному значенні, як елементу ідентичності. Локальна ідентичність почасти має вагоміше значення для людини, ніж державна або національна. Мешканці поселень загалом досить позитивно оцінюють середовище свого повсякденного існування, ніж сторонні спостерігачі та аналітики, які іноді є доволі упередженими в оцінках. Потрібно формувати оптику аналізу не суто з позицій т. зв. найкращого досвіду, а із зануренням у специфіку місцевої історії та повсякденних життєвих практик.

У статті проаналізовано елементи критики спальних районів з позиції адвокації: те, що тривалий час сприймали як негативну характеристику, переосмислено в ракурсі позитивних ефектів і перспектив реновацій. Адже справді є сенс трансформацій соціального простору спальних мікрорайонів, втім поміркованих, з увагою до елементів локального соціокультурного середовища. Зокрема, звернено увагу на той факт, що предикат «спальний» у сучасних реаліях уже не відповідає дійсності й поступово стає рудиментарним, адже так звані спальні мікрорайони перетворюються на житлові масиви, або, як їх називають, «великі житлові комплекси», які охоплюють дрібний бізнес і торгівлю, освітні заклади, спортивні та розважальні локації, розгалужені транспортні системи.  Мікрорайони стають просторами широких можливостей для становлення та зміцнення локальних міських громад шляхом розвитку третіх місць – закладів і просторів, що формують комунікаційні зв’язки між місцевими мешканцями в контексті задоволення таких потреб, як дрібні закупівлі товарів, послуги з краси та відпочинку тощо.

Спальні мікрорайони, що були сформовані переважно як «перші місця» (домівки), активно формують пам’ять місцевих – тих, хто проводить там досить значний час свого життя, задовольняє основні потреби комфортного відпочинку та вільного від роботи перебування. Тож, аналізуючи соціальну пам’ять, потрібно звертати увагу і на контексти буденності, які не менш важливі у формуванні ідентичності як складової ширшого контексту – історичної пам’яті.
Determination of optimal operating modes of the Ukrainian power system when covering the daily schedule of electrical loads, ensuring the necessary volumes of redundancy and using storage capacities
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Denisov V.A.
Published: April 2021

We propose a model of mathematical programming with integer variables, the use of which provides a search for the optimal modes of redundancy and loading of storage capacities of the power plants in Ukraine with covering the daily schedule of electrical loads. The main purpose of this work is to create a tool for studying the possibilities of optimized dispatching of generating capacities of thermal power plants, as well as generating and reserve capacities of high-power storage units within the IPS of Ukraine, the limits of permissible values of the parameters of generating and storing capacities, at which stable balanced operation of the energy system is possible. The model enables one to determine the optimal modes of using generating and storing capacities for covering the schedule of electrical loads without using storage and with using storage at different values of the total installed and peak power of SES and wind farms. The model takes into account the specific features of the operation of reserve and storage capacities of the Ukrainian energy system – the maximal possibilities for change in the power of storage and generation of electricity units of the Ukrainian energy system and possibility to provide support for frequency recovery reserves (secondary regulation) at a given level, located at thermal power plants, PSPPS, and high-power storage facilities. The model enables us to study the possibilities of optimized dispatching of the components of the IPS of Ukraine, the limits of permissible values of parameters of generating and storing capacities, at which stable balanced operation of the energy system is possible and can be applied in the tasks of forming forecast balances covering daily schedules of electric loads to study the prospects for short- and long-term development of storage and generating capacities of the national energy system, which is relevant under conditions of rapid growth of the capacity of wind and solar power plants. The model is implemented in the mathprog algebraic modeling language, which is a component of the Solver Studio optimization package and uses the COIN-OR PuLP modeling language. Keywords: power system, daily load schedule of the power system, reserve and storage capacities, model of mathematical programming with integer variables, optimal solution
Fuel consumption of thermal power technologies under maneuvering modes
Authors:   Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha str., Kyiv, 03150, Ukraine, Kobernik V.S.
Published: April 2021

A characteristic feature of the present day development of power engineering lies in the increase in the unevenness of power systems schedules. The structure of generating powers of Ukrainian energy engineering is overloaded with basic powers and characterized by a sharp deficit of maneuvering wanes. To cover the uneven load of the power system during the operation of existing and construction of new power plants, it is necessary to take into account the possibility of their operation under maneuvering modes. This paper determines the influence of work of power plants i under maneuvering modes on the specific consumption of conditional fuel on the released electric energy at working on gas or coal fuel. Fuel consumption for starting of a unit depends on its type and downtime in reserve. The use of steam–and–gas facilities and gas turbines helps to enhance the maneuverability of power plants. Alternative options for the development of thermal energy are the introduction of gas–piston power plants and power units with fluidized–bed boilers. We present formulas for the calculations of fuel consumption on by power units for start–ups and specific consumptions depending on the load and degree of their involvement to regulating loads for different thermal energy technologies: steam–turbine condensation and district heating power units; steam–and–gas and gas turbine plants; gas piston installations; power units with fluidized bed boilers. For enhancing the maneuverability of power plants, working on fossil fuels, their modernization and renewal of software are necessary. Quantitative assessment of the efficiency of power units and separate power plants during their operation under variable modes is important for forecasting the structure of generating capacities of power systems, the need to introduce peak and semi–peak capacities, the choice of the most profitable composition of operating equipment at different schedules of electrical loads Keywords: thermal power, power unit, maneuverable mode, electrical load, specific fuel consumption
Пропоксазепам — новаторський анальгетичний засіб, що гальмує гострий та хронічний біль і має полімодальний механізм дії
Authors: Головенко Микола Якович
Published: April 2021

У статті наведено результати фундаментальних та прикладних досліджень інноваційного анальгетичного засобу пропоксазепам. Сполука взаємодіє з біологічними мішенями, які відповідають за перебіг болю (нейромедіатори ГАМК та гліцину, потенціал-залежні калієві канали, дофамінергічна система, NMDA-рецептори, альфа-1 адренорецептори). Фармакодинамічний профіль пропоксазепаму відрізняється від усіх анальгетиків, оскільки одночасно гальмує і гострий, і хронічний біль, має протизапальну та антиконвульсантну дії. Біодоступність сполуки становить 80%, виявлено незначну кількість метаболітів (3-гідроксипохідне, ареноксиди). Експериментально доведено відсутність кумуляції, розвитку толерантності, залежності та синдрому відміни в експериментальних тварин, яким тривалий час вводили пропоксазепам. Розроблено технологічний регламент синтезу сполуки та готової лікарської форми (таблетки 1; 2 і 5 мг). Отримано дозвіл МОЗ України на проведення клінічних випробувань. Зважаючи на яскраво виражену міждисциплінарність конструювання анальгетика, показано доцільність та ефективність взаємодії дослідників різних спеціальностей.
A Multidisciplinary Quality Improvement Initiative to Facilitate Penicillin Allergy Delabeling Among Hospitalized Pediatric Patients
Authors: Bauer Maureen Egan , MacBrayne Christine , Stein Amy , Searns Justin , Hicks Allison , Sarin Tara , Lin Taylor , Duffey Hannah , Rannie Michael , Wickstrom Kaylee , Yang Cheryl , Bajaj Lalit , Carel Kirstin
Published: April 2021

BACKGROUND:

Penicillin allergy is reported in up to 10% of the general population; however, >90% of patients reporting an allergy are tolerant. Patients labeled as penicillin allergic have longer hospital stays, increased exposure to suboptimal antibiotics, and an increased risk of methicillin-resistant Staphylococcus aureus and Clostridioides difficile. The primary aim with our quality improvement initiative was to increase penicillin allergy delabeling to at least 10% among all hospitalized pediatric patients reporting a penicillin allergy with efforts directed toward patients determined to be low risk for true allergic reaction.

METHODS:

Our quality improvement project included several interventions: the development of a multidisciplinary clinical care pathway to identify eligible patients, workflow optimization to support delabeling, an educational intervention, and participation in our institution’s quality improvement incentive program. Our interventions were targeted to facilitate appropriate delabeling by the primary hospital medicine team. Statistical process control charts were used to assess the impact of this intervention pre- and postpathway implementation.

RESULTS:

After implementation of the clinical pathway, the percentage of patients admitted to hospital medicine delabeled of their penicillin allergy by discharge increased to 11.7%. More than one-half of those delabeled (51.2%) received a penicillin-based antimicrobial at time of discharge. There have been no adverse events or allergic reactions requiring emergency medication administration since pathway implementation.

CONCLUSIONS:

Our quality improvement initiative successfully increased the rate of penicillin allergy delabeling among low-risk hospitalized pediatric patients, allowing for increased use of optimal antibiotics.
Home-Monitoring Application for Children With Medical Complexity: A Feasibility Trial
Authors: Nkoy Flory , Stone Bryan , Hofmann Michelle , Fassl Bernhard , Zhu Angela , Mahtta Namita , Murphy Nancy
Published: April 2021

OBJECTIVES:

Mobile apps are suggested for supporting home monitoring and reducing emergency department (ED) visits and hospitalizations for children with medical complexity (CMC). None have been implemented. We sought to assess the MyChildCMC app (1) feasibility for CMC home monitoring, (2) ability to detect early deteriorations before ED and hospital admissions, and (3) preliminary impact.

METHODS:

Parents of CMC (aged 1–21 years) admitted to a children’s hospital were randomly assigned to MyChildCMC or usual care. MyChildCMC subjects recorded their child’s vital signs and symptoms daily for 3 months postdischarge and received real-time feedback. Feasibility measures included parent’s enrollment, retention, and engagement. The preliminary impact was determined by using quality of life, parent satisfaction with care, and subsequent ED and hospital admissions and hospital days.

RESULTS:

A total of 62 parents and CMC were invited to participate: 50 enrolled (80.6% enrollment rate) and were randomly assigned to MyChildCMC (n = 24) or usual care (n = 26). Retention at 1 and 3 months was 80% and 74%, and engagement was 68.3% and 62.6%. Run-chart shifts in vital signs were common findings preceding admissions. The satisfaction score was 26.9 in the MyChildCMC group and 24.1 in the control group (P = .035). No quality of life or subsequent admission differences occurred between groups. The 3-month hospital days (pre-post enrollment) decreased from 9.25 to 4.54 days (rate ratio = 0.49; 95% confidence interval = 0.39–0.62; P < .001) in the MyChildCMC group and increased from 1.08 to 2.46 days (rate ratio = 2.29; 95% confidence interval = 1.47–3.56; P < .001) in the control group.

CONCLUSIONS:

MyChildCMC was feasible and appears effective, with the potential to detect early deteriorations in health for timely interventions that might avoid ED and hospitalizations. A larger and definitive study of MyChildCMC’s impact and sustainability is needed.
Nurse/Resident Reciprocal Shadowing to Improve Interprofessional Communication
Authors: Monroe Kimberly K. , Kelley Jennifer L. , Unaka Ndidi , Burrows Heather L. , Marshall Trisha , Lichner Kelli , McCaffery Harlan , Demeritt Brenda , Chandler Debra , Herrmann Lisa E.
Published: April 2021

OBJECTIVES:

Poor communication is a major contributor to sentinel events in hospitals. Suboptimal communication between physicians and nurses may be due to poor understanding of team members’ roles. We sought to evaluate the impact of a shadowing experience on nurse–resident interprofessional collaboration, bidirectional communication, and role perceptions.

METHODS:

This mixed-methods study took place at 2 large academic children’s hospitals with pediatric residency programs during the 2018–2019 academic year. First-year residents and nurses participated in a reciprocal, structured 4-hour shadowing experience. Participants were surveyed before, immediately after, and 6 months after their shadowing experience by using an anonymous web-based platform containing the 20-item Interprofessional Collaborative Competency Attainment Survey, as well as open-ended qualitative questions. Quantitative data were analyzed via linear mixed models. Qualitative data were thematically analyzed.

RESULTS:

Participants included 33 nurses and 53 residents from the 2 study sites. The immediate postshadowing survey results revealed statistically significant improvements in 12 Interprofessional Collaborative Competency Attainment Survey question responses for nurses and 19 for residents (P ≤ .01). Subsequently, 6 questions for nurses and 17 for residents revealed sustained improvements 6 months after the intervention. Qualitative analysis identified 5 major themes related to optimal nurse–resident engagement: effective communication, collaboration, role understanding, team process, and patient-centered.

CONCLUSIONS:

The reciprocal shadowing experience was associated with an increase in participant understanding of contributions from all interprofessional team members. This improved awareness may improve patient care. Future work may be conducted to assess the impact of spread to different clinical areas and elucidate patient outcomes that may be associated with this intervention.
Acetaminophen Therapy for Persistent Patent Ductus Arteriosus
Authors: Manalastas Maika , Zaheer Fatima , Nicoski Pamela , Weiss Marc G. , Amin Sachin
Published: April 2021

Persistence of a left-to-right shunt caused by a patent ductus arteriosus (PDA) leads to significant sequelae in extremely premature infants as a result of pulmonary overcirculation and systemic steal. Although timing and duration of treatment for a persistent clinically significant PDA differ among institutions, standard pharmacologic interventions are the nonsteroidal anti-inflammatory drugs indomethacin and ibuprofen. Acetaminophen has emerged as an alternative to indomethacin and ibuprofen with less significant adverse effects, but there is no consensus regarding its use. This review summarizes the most recent evidence for the use of acetaminophen in PDA treatment.
“Os senhores da floresta”
Authors: Rodrigues Cintia Regia
Published: April 2021

O presente trabalho visa apresentar os discursos produzidos sobre os indígenas em Santa Catarina através da imprensa, sobretudo na imprensa de Blumenau/SC, no contexto da criação do SPILTN (Serviço de Proteção ao Índio e Localização de Trabalhadores Nacionais), que é inaugurado em 1910 pelo governo federal. O jornal pesquisado foi o Der Urwaldsbote no recorte temporal de 1910 a 1914. Os jornais são fontes históricas, desta forma, devem ser entendidos como uma das ferramentas pelas quais a sociedade analisa e reformula suas ideias, portanto, produz discursos numa determinada época e contexto. O artigo analisa como os indígenas foram percebidos na imprensa no limiar da elaboração e da implementação de uma política nacional para a questão indígena, concomitantemente com o progresso que estava em marcha no país e a questão da imigração e colonização.
Del rio Magdalena al rio de la Plata
Authors: Esteban Moreno Eduard
Published: April 2021

El objetivo de este texto es describir las diversas formas en que se dieron la recepción y circulación de las ideas de izquierda (libertad, igualdad, unión y resistencia), en el marco de la movilidad de dos intelectuales-populares de Brasil y Colombia, durante las primeras décadas del siglo XX. A partir de una perspectiva comparada ubicaré las formas de circulación por medio del despliegue de escalas tanto espaciales como temporales, estableciendo ritmos, continuidades y rupturas como elementos constitutivos de los procesos de circulación. Para el caso brasilero acudiré a la figura de Abilio de Nequete (Fiha, Líbano, 1888 - Porto Alegre, 7 de agosto de 1960). En Colombia, identificaré la trayectoria de Raúl Eduardo Mahecha (El Guamo, 13 de octubre de 1884 - Bogotá, 17 de julio de 1940). A partir de esta comparación sostendré, en términos de hipótesis, que la circulación de las ideas a escala de los individuos hizo posible que se constituyeran redes que posibilitaron su apropiación en el seno de los sectores populares. Proceso que no solo se dio por la fuerza intrínseca de las ideas en sí, sino por el carisma de los sujetos y su imagen como intelectuales-populares. De esta manera, se agenció un doble proceso de constitución intelectual y popular en el marco de la circulación de las ideas.
Algunos reflexiones sobre género y memoria en las narrativas sobre los años setenta en Argentina
Authors: Noguera Ana Laura
Published: April 2021

Hace varios años que el campo de la denominada Historia Reciente ha cobrado especial legitimidad, al menos dentro de la historiografía argentina. Como han demostrado numerosas investigaciones, en la Argentina de los años setenta las mujeres fueron activas participantes de diversas organizaciones sociales y político-militares. Sin embargo, tras la recuperación democrática de los años ochenta y buena parte de los noventa, las narraciones que dieran cuenta de dicha participación fueron invisibilizadas. Desde estas coordenadas, en este artículo nos proponemos hacer algunas reflexiones teórico-metodológicas de los vínculos entre género y memoria en la historia reciente. Señalaremos, por un lado, los aportes que la historia de las mujeres con perspectiva de género le confirió a la historiografía tradicional. Por otro lado, reflexionaremos sobre los vínculos entre género y memoria en las narraciones de mujeres y varones militantes políticos. Finalmente, realizaremos un breve recorrido por las producciones que desde el campo de la historia reciente han analizado los sesenta y setenta en nuestro país.
Manos que mecen la cuna
Authors: Osta Vázquez María Laura
Published: April 2021

Este artigo propor-se pesquisar a relacao que existiu entre a difusao do discurso maternalista, promovido pelos médicos, políticos, sacerdotes, filósofos, e o declive da professao de nodriza em Montevideo do seculo XIX. A partir dum análise de género se buscará identificar os vínculos de poder representados no tratamento e disciplinamento dos corpos dessas mulheres em grande parte pretas, mestizas e extrangeiras. Para isso se analizará emprensa, registros da policia, cartas, informes médicos e catálogos de livrarías, procurando rastros do discurso maternalista (proveniente do higienismo médico) que intentavam criticar e desvalorizar a labor das nodrizas que muito útiles e de moda tinham estado durante o seculo XVIII e parte do XIX.
As mulheres e suas tramas impressas
Authors: Souto Bárbara Figueiredo
Published: April 2021

O objetivo deste artigo é realizar uma breve reflexão sobre a quase total exclusão das mulheres no campo historiográfico, mais especificamente nas áreas da história da imprensa e no âmbito das produções da história intelectual no Brasil e na Argentina, principalmente no que se refere às discussões sobre o século XIX. Além disso, almeja analisar a atuação das mulheres na imprensa, durante os anos iniciais da década de 1850, em periódicos de propriedade feminina e perspectiva feminista. Para tanto, utiliza como fonte os periódicos Jornal das Senhoras, veiculado no Rio de Janeiro, entre 1852 e 1855; La Camelia e Album de Señoritas, ambos publicados em Buenos Aires, sendo o primeiro veiculado em 1852 e o segundo em 1854. A partir das análises, constata-se que a atuação das mulheres na imprensa oitocentista propicia uma releitura das tramas sociais no Rio de Janeiro e Buenos Aires e as problematizações historiográficas constatam a necessidade de ampliar as abordagens realizadas pela história da imprensa e pela história intelectual, inserindo também a ação e produção das mulheres nos processos históricos brasileiros e argentinos.
História das Mulheres, das relações de gênero e das sexualidades dissidentes
Authors: Pedro Joana Maria , Domínguez Prats Pilar
Published: April 2021

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As principais contribuições das Teorias da Aprendizagem para à aplicação das Metodologias Ativas
Authors: Cervi Uzun Maria Luisa
Published: April 2021

Este artigo constitui-se em texto de revisão bibliográfica, que tem como objetivo fazer um levantamento sobre as principais contribuições de algumas teorias da aprendizagem para as metodologias ativas. No contexto de discussões sobre metodologias ativas, especialmente no ensino superior, o presente trabalho se faz necessário para situar esta metodologia com abordagens já sacramentadas no âmbito pedagógico. Discorremos este artigo pautado nas principais teorias da aprendizagem de John Dewey (1859-1952), Carl Rogers (1902-1987), Piaget (1923-1980), David Ausubel (1918-2008) e Vygotsky (1896-1934). Conclui-se que as teorias da aprendizagem dão suporte pedagógico à aplicação de um método ativo de ensino-aprendizagem fornecendo assistência contínua ao professor no que tange a cognição dos alunos.
Palavras-chave: Ensino Superior; Metodologias Ativas; Teorias da Aprendizagem.
DESIGN DOCUMENTATION SHOP-TO-SHOP ROUTING AND ITS STUDY ON TECHNOLOGICAL EFFECTIVENESS PROCESS MODERNIZATION AS THE STEP OF DIGITALIZATION AT SRC “PROGRESS”
Authors:   SRC “Progress”, Belikov Andrey
Published: April 2021

In this paper the existing in PDM-system business-process of design documentation shop-to-shop routing and its study on technological effectiveness at SRC «Progress» is considered. General approach to the organization of dual paper-electronic process at the enterprise is described. This approach allows quick study of design documentation depending on its type (paper or electronic). The analysis of the existing process with definition of its merits and demerits is carried out. Considering analysis results, proposals on process modernization are developed. The project documentation and work plan were prepared. Software is developed for the modernized process. During the tests of process its working capacity was already confirmed and essential decrease in creation time of objects in PDM-system is revealed. As a result this fact will allow to reduce users’ working time. In this particular work the need for the special software is considered, which will automatically translate the existing information objects in PDM-system from old data model to new data model. The direction for business process digitalization and exception of enterprise employees labor costs on paper documentation movement between departments is defined.