bluuebunny/crossref_metadata_2025 huggingface dataset:
ToksikLiderlik ve Psikolojik Şiddetin Örgütsel Güvene Etkisi: Hizmet Sektörü Çalışanları Üzerine Bir Araştırma (The Effect of Toxic Leadership and Psychological Violence on Organizational Trust: A Study on Service Sector Employees)
Authors: Yavuz Ercan , Topaktaş Gülsen , Çelik Ertunç , Demirel Mustafa A.
Published: March 2023

Amaç–Psikolojik şiddet işgörenler üzerinde birçok olumsuz etkiye sahiptir. Toksik liderlik davranışına maruz kalan çalışanlarda zehirleyici etkiler görülebilmektedir. Bu açıdan değerlendirildiğinde psikolojik şiddet ve toksik liderlik davranışına maruz kalan işgörenlerin örgütsel güven niyetleri olumsuz yönde etkileneceği düşünülmektedir. Bu bağlamda çalışmanın amacını toksik liderlik ile psikolojik şiddetin örgütsel güven düzeyine etkisinin tespit edilmesi oluşturmaktadır.Yöntem –Araştırma kapsamında bağımlıve bağımsız değişkenler arasındaki ilişkilerin ve etkilerin tespit edilmesi amacıyla kullanılan ilişkisel tarama modeli ile araştırmanın modeli ve hipotezleri belirlenmiştir. Araştırmanın evrenini Ankara ilinde hizmet sektöründe faaliyet gösteren işgörenler oluşturmaktadır. Örneklem hesaplaması sonucunda yeterli sayının üstünde olan 390 işgören, orta ve üst kademe yöneticinin katılımı ile araştırmanın saha çalışması tamamlanmıştır. Nicel veri toplama yöntemleri içerisinde yer alan anket tekniği ile verilertoplanmıştır.Bulgular –Psikolojik şiddet örgütsel güveni negatif yönde ve anlamlı olarak etkilemektedir. Toksik liderlik örgütsel güveni olumsuz yönde ve anlamlı olarak etkilemektedir ve toksik liderlik ve psikolojik şiddet örgütsel güven üzerinde anlamlı bir etkiye sahip olduğu araştırma kapsamında belirlenmiştir. Tartışma –Toksik liderliğe maruz kalınması neticesinde psikolojik şiddet algılarında kalıcı etkiler ortaya çıkabilecektir ve işgörenler psikolojik anlamda olumsuz etkilenebilmektedir. Ortaya çıkan bu sonuçlar kuramsal yapıyı desteklemektedir ve toksik liderliğin örgütler açısından olumsuz sonuçlar doğurduğu görülmektedir. Örgütlerin bu tür davranışlara engel olabilecek denetim ve eğitim politikalarını geliştirmesi ve bu tür davranışlara engel olması gerekmektedir
Türk Turizm Sektöründe Piyasa Etkinliği: Ekonomik Büyüme Üzerine Olay Çalışması (Market Efficiency in the Turkish Tourism Sector: Event Study on Economic Growth)
Authors: Erkılıç Ahmet Yakup , Karacaer Semra
Published: March 2023

Amaç –Bu çalışmada, Türkiye’nin ekonomik büyüme rakamları kamuoyuna açıklandığı zaman Türk Turizm Sektörünün bu verilere gösterdiği tepkinin incelenmesi amaçlanmıştır. Yöntem –Araştırmada etkin piyasalar hipotezinden faydalanılmıştır ve olay çalışması yöntemi kullanılmıştır. Türkiye’nin aralıksız bir şekilde yıllık pozitif ekonomik büyüme gösterdiği 2010-2020 yılları arasının temel alındığı bu çalışmada, çeyrek dönemler halinde yılda dört kez ilan edilen ekonomik büyüme oranının açıklandığı gün (t), olay tarihiolarak ele alınmıştır. Olay penceresi aralığı (t-5, t+5) olarak, tahmin penceresi aralığı ise (t-20, t-6) olarak analize dahil edilmiştir. Araştırmanın tahmin modeli olarak ise piyasa modeli kullanılmıştır. Piyasa getirisini ölçmek amacıyla BİST 100 Endeksinin getirisinden, Türk turizm sektörünü temsilen ise BİST Turizm Sektör Endeksinin getirisinden faydalanılmıştır. Bulgular –Araştırma sonucunda “H0: Türkiye’nin çeyrek dönemlik ekonomik büyüme rakamlarının açıklanması ile birlikte BIST Turizm Sektör Endeksinin olay penceresindeki kümülatif anormal getirisi sıfıra eşittir. (CARt1,t2 = 0)” hipotezi reddedilememiş olup Türkiye’nin ekonomik büyüme rakamları kamuoyuna açıklandığı zaman Türk Turizm Sektörünün bu verilere hızlı, tam ve doğru bir şekilde tepki gösterebildiği bulgusuna erişilmiştir. Tartışma –Türk turizm sektörü ileekonomik büyüme arasındaki ilişkinin olay çalışması yaklaşımı ile ele alındığı bu çalışmada, etkin piyasalar hipotezine göre Türk turizm sektörünün yarı güçlü formda etkin olduğu görülmüş olup etkin bir turizm sektörünün varlığının, yabancı yatırımcıların turizm alanındaki yatırımlarını çoğaltmaları için önemli bir unsur olduğu değerlendirilmiştir. Ayrıca, bu durumun Türkiye’nin ekonomik olarak daha çok büyümesine ve dünya turizm pazarında daha büyük yerler edinmesine yol açabileceği düşünülmektedir.
Impact of Formal Education Regarding Breaking Bad News on Self-Efficacy
Authors: Vera Kathryn M. , Anderson Sue
Published: March 2023

Background: Breaking bad news in a clinical setting can lead to a negative experience for the healthcare provider when delivered inappropriately. This Doctor of Nursing Practice (DNP) Practice Innovation Project seeks to discover if healthcare providers who receive formal education in breaking bad news to patients have increased self-efficacy in breaking bad news compared with healthcare providers not formally educated in a DNP Program. This comparison was analyzed using a pre-test/post-test format. Purpose: The purpose of this DNP Practice Innovation Project is to improve the healthcare provider's self-efficacy in breaking bad news to a patient through an educational module outlining the SPIKES protocol, ultimately improving the experience for the healthcare provider. Methodology: Participants included students enrolled in the DNP program in the Saint Mary's College Department of Nursing Science. The SE-12 self-efficacy tool measured the participants' self-efficacy utilizing a pre-test/post-test method that measured self-efficacy before and after the presentation of the educational module. The data from the pretest and posttest were analyzed using a two-tailed paired samples t-test. Results: The result was significant, suggesting the difference in the mean overall score of the SE-12 pretest and the mean overall score of the SE-12 posttest was significantly different from zero. The mean overall score of the SE-12 pretest was significantly lower than the mean overall score of the SE-12 posttest. Conclusion: This study established how education about breaking bad news can lead to an improved experience for the healthcare provider, ultimately improving health outcomes.
Desarrollo de un método analítico para la determinación de las especies Cr(III) y Cr(VI) en medio acuoso
Authors:   Universidad del Zulia, Andrade Charity , Cáceres Ana ,   Universidad del Zulia, López Gabriela ,   Universidad del Zulia, Morales Ever ,   LAICA Eloi Alfaro de Manabí ULEAM
Published: March 2023

El cromo está presente en la naturaleza principalmente como las especies Cr(III) y Cr(VI). El Cr(III) se conoce como oligoelemento esencial, mientras que el Cr(VI) presenta toxicidad aguda. Se desarrolló un método cromatográfico (HPLC-iónico) para la determinación de ambas especies de cromo en medio acuoso contaminado durante su tratamiento por fitorremediación. Para esto se requirió la formación previa del complejo aniónico [Cr(III)-EDTA]–. Se evaluó en modo isocrático la fuerza iónica de la fase móvil y en modo gradiente la velocidad de flujo y el tiempo de gradiente. El Cr(VI) presentó una fuerte interacción con la fase estacionaria, siendo adecuada la determinación con 9.0 mM Na2CO3/3.0 mM NaHCO3, de mayor fuerza iónica. Para Cr(III) la determinación fue con 2.8 mM Na2CO3/3.4 mM NaHCO3. Mediante el uso del gradiente de concentración se logró separar y cuantificar simultáneamente ambas especies en las siguientes condiciones: fase móvil A: 2.8 mM Na2CO3/3.4 mM NaHCO3 con introducción gradual de B: 9.0 mM Na2CO3/3.0 mM NaHCO3, a t = 0.5 min, velocidad de flujo de 1.5 mL/min y volumen de muestra de 50 μL. El uso de HPLC-iónico representa una alternativa eficiente, rápida y con menor impacto ambiental que las técnicas convencionales con la notable ventaja de la determinación simultánea de estas especies.
Deciphering Pain in Vulnerable People with Chronic Conditions
Authors: Faurie Charlotte , Cheng Demi , Duflos Claire , Elstgeest Liset E.M. , Ferreira Rosanna , Raat Hein , Valsecchi Verushka , Pilotto Alberto , Baker Graham , Pisano-Gónzalez Marta María , Pers Yves-Marie
Published: March 2023

Chronic pain is a source of major alterations in quality of life. It represents significant costs for health systems, and reduces the competitiveness of the working population. Vulnerability can drive the incidence of chronic pain, through its influence on modifiable risk factors, and reduced utilization of health care systems. But vulnerability can also be the consequence of a chronic pain: illness can push people into precariousness. We analysed the factors associated with pain intensity among vulnerable persons with a chronic condition, in five European countries (N=1,364). Pain was, among the whole set of variables, the main predictor of sleep problems, fatigue, depression, self-perceived health, physical and mental quality of life. This is in line with other studies showing the major impact of pain on an individual’s health and life. Multivariable analyses, adjusting for the whole set of variables, showed that women had more intense pain, as well as participants with a lower education level. These results confirm the social component in the complex etiology of pain and clearly plaid in favor of integrated care, taking into account individual characteristics and environment.
Partitioning of Dissolved Organic Carbon, Major Element and Trace Metal During Laboratory Freezing of Organic Leachates From Permafrost Peatlands
Authors: Ivanova Irina S. , Shirokova Liudmila S. , Rols Jean-Luc , Pokrovsky Oleg S.
Published: March 2023

The climate change is likely to modify the freezing-thawing cycles in soils and surface waters of permafrost-affected and subarctic regions. Yet, the change of solution chemical composition during ice formation and evolution of remaining fluids remain very poorly known. Towards better understanding of dissolved (< 0.45 µm) organic carbon, major and trace elements behavior in permafrost peatland environments, here we performed laboratory freezing of peat leachates, from complete freezing to complete thawing in order to quantify the partitioning of solutes between the aqueous solution and the remaining ice. We hypothesized the existence of two main groups of solutes, behaving conservatively or non-conservatively during freezing depending on their incorporation into the ice or ability to coagulate in the form of insoluble minerals or amorphous materials in the fluid phase. An unexpected result of this work was that, despite sizable degree of element concentration in the remaining fluid and possible coagulation of organic, organo-mineral and inorganic compounds, the freezing and subsequent thawing produced the final concentrations of most solutes which were not drastically different from initial concentrations in starting leachates, prior freezing. This demonstrates high stability of dissolved (< 0.45 µm) OC, Fe, Al and some trace metals to repetitive freezing and thawing of surface waters in permafrost peatlands.
Effect of Dietary Fiber Alleviate Gut Microbiota and Metabolite Associated with High-Meat Diet in Children
Authors: Du Zhi , Ye Xiaoli , Fu Hao , Li Jiabin , Ding Jieying , Ren Guofei , Zhou Linying , Pi Xionge , Miao Jing
Published: March 2023

The gut microbiota plays a crucial role in childhood obesity, and diet is a dominating driver. The effects of fructo-oligosaccharides (FOS), as a dietary fiber, on the composition and metabolism of gut microbiota in healthy children was investigated by vitro fermentation system with a reformative YCFA medium (rich in tryptic hydrolysates of meat). The 16S rRNA sequencing technology was utilized to analyze the varieties of gut microbiota. Measurement of short chain fatty acids (SCFAs) and gases were used by the gas chromatograph. Majorbio Cloud Platform and MetOrigin, as the interactive cloud server, perform the microbiota analysis, the metabolic pathway enrichment analysis, the statistical correlations, and biological relationships using network visualization. We found that the FOS group significantly regulated the composition and metabolism of gut microbiota. The co-metabolism network showed that 3 metabolites were related to 6 differential bacteria and 8 metabolism pathways. These findings suggest that dietary fiber could regulate the composition of gut microbiota and its metabolites in a better direction, but when dietary fiber participates in precision nutrition formula, it may be relevant for precision obesity, may help identify windows of opportunity for the dietary intervention of childhood obesity.
An Audit of Geriatric Capacity Assessments Performed in a General Psychiatry Unit over a Decade
Authors: MD Eduard P. Drima
Published: March 2023

Geriatric decisional capacity assessment is a complex medico-legal activity that evaluates normal subjects involved in specific civil matter like wealth transfer, access to treatment or voluntary hospitalization. Our objective was to evaluate how geriatric extrajudicial capacity exams impacted a general psychiatric unit over a decade. We also assessed the value of a surrogate biomarker (neutrophils to lymphocyte ratio) as a screening factor in the capacity assessment process. 72 cases were assessed in one psychiatric unit over a decade (2009-2018). As population was fast ageing, the total number of capacity exams per year doubled in time. None of the subjects had an active diagnostic of severe cognitive impairment or active psychiatric disease. The percentage of subjects receiving an “absence of capacity” conclusion remained constant over time (approx. 20% of all cases). 81% of the subjects within this subgroup had a clinical diagnostic of mild cognitive impairment compared to 46% in the “presence of capacity” subgroup (p<0.001). The surrogate biomarker neutrophils to lymphocyte ratio was significantly higher in the “absence of capacity” subgroup, mainly related to a cognitive impairment diagnostic. The ratio has to be validated by larger studies before to be included in the capacity assessment process as an early screening tool.
Bacteriological Analysis of Sachet Water Sold in Obi Local Government Area, Benue State, Nigeria
Authors: Oboh Monday , Olotu Blessing
Published: March 2023

The study was geared toward isolating, characterizing and identifying bacterial pathogen in sachet water in addition to determines the bacterial count of the sachet water sold in Obi Local Government Area. Twelve sachet water samples from different companies were analyzed using standard microbiological methods. The microorganism found are Escherichia Coli, Staphylococcus aures, Salmonella spp, with Staphlococuss aureus showing the highest incidence (50%), observed by Escherichia coli (29.17%) and Salmonella spp with the lowest occurrence (20.8%). The presence of these microbes in drinking water possesses a threat to life. The findings consequently suggest that some of the sachet water sold in obi L.G. A are not healthy for human intake and are risky to health. Hence there's need for strict concern and routine monitoring by regulatory agencies to make sure that appropriate treatment is applied inside the manufacturing of exceptional and safe sachet drinking water. This study is aimed to analyze the bacteriological quality of some selected sachet water in Obi Local Government Area of Benue State, Nigeria.
Keeping in Motion or Staying Put: Internal Migration in the United States and China
Authors: Dietz Joshua , Li Bulin , Castañeda Ernesto
Published: March 2023

When we discuss migration and compare national trends, the topic most commonly centers on undocumented immigrants and asylum seekers. However, there is also considerable variation in internal migration patterns, with differences found between and within nations. Many factors shape whether, why, and where people relocate. Over the last few decades, the world's two largest economies - the United States and China - have seen domestic migration changes happening in opposite directions. China has become increasingly mobile and experienced urbanization. In contrast, the U.S. has seen a steady decline in the rate at which its population relocates, with cities experiencing net migration losses as citizens leave for suburbs. This paper examines these trends using data from the last decade to compare the two nations in areas of internal migration, urbanization, housing, social mobility, and economic growth.
Non-Vacuum Solutions, Gravitational Collapse and Discrete Singularity Theorems in Wolfram Model Systems
Authors: Gorard Jonathan
Published: March 2023

The celebrated geodesic congruence equation of Raychaudhuri, together with the resulting singularity theorems of Penrose and Hawking that it enabled, yield a highly general set of conditions under which a spacetime (or, more generically, a pseudo-Riemannian manifold) is expected to become geodesically incomplete. However, the proofs of these theorems traditionally depend upon a collection of assumptions about the continuum spacetime (and, in the physical case, the stress-energy distribution defined over it), including its global structure, its energy conditions, the existence of trapped null surfaces and the various volume/intersection properties of geodesic congruences, that are inherently difficult to translate to the case of discrete spacetime formalisms, such as causal set theory or the Wolfram model. Some, such as the discrete analog of Raychaudhuri's equation for the volumes of geodesic congruences, are subtle to formulate due to intrinsic differences in the behavior of discrete vs. continuous geodesics; for others, such as the definition of a trapped null surface, no appropriate translation is known for the general discrete case due to a lack of a priori coordinate information. It is therefore a non-trivial question to ask whether (and to what extent) there exist equivalently general conditions under which one expects discrete spacetimes to become geodesically incomplete, and how these conditions might differ from those in the continuum. This article builds upon previous work, in which the conformal and covariant Z4 (CCZ4) formulation of the Cauchy problem for the Einstein field equations, with constraint-violation damping, was defined in terms of Wolfram model evolution over discrete (spatial) hypergraphs for the case of vacuum spacetimes, and proceeds to consider a minimal extension to the non-vacuum case by introducing a massive scalar field distribution, defined in either spherical or axial symmetry. Under appropriate assumptions, this scalar field distribution admits a physical interpretation as a collapsing (and, in the axially-symmetric case, uniformly rotating) dust, and we are able to show, through a combination of rigorous mathematical analysis and explicit numerical simulation, that the resulting discrete spacetimes converge asymptotically to either non-rotating Schwarzschild black hole solutions or maximally-rotating (extremal) Kerr black hole solutions, respectively. Although the assumptions used in obtaining these preliminary results are very strong, they nevertheless offer hope that a more general, perhaps ultimately ``Penrose-like'', singularity theorem may be provable in the discrete spacetime case too.
A Roadmap with Strategic Policy toward Green Hydrogen Production: the Case of Iraq
Authors: Hassan Qusay , Sameen Aws Zuhair , Salman Hayder M. , Jaszczur Marek
Published: March 2023

The most potential renewable energy source for global emissions reductions is green hydrogen production. Iraq is looking into several sources of alternative energy to lessen its dependency on fossil fuels and to considerably cut its carbon dioxide emissions. This research examined the conceptual framework for the production and consumption of green hydrogen in Iraq. On the basis of accessible official and public data from government agencies, the potential capabilities of renewable energy resources are assessed, and certain fair assumptions are also established for a full study and evaluation of a possible hydrogen production in the country. The data presented here demonstrate conclusively that the contributions of renewable energy to the production of green hydrogen are substantial, giving the country prominence in the area of green hydrogen production. A pathway for a green hydrogen economy in the country by 2050 is proposed by this research based on its analysis. It is distributed in three stages: green hydrogen as a fuel for industry; using green hydrogen for fuel cells; and hydrogen commercialization. On the other hand, the research found a number of challenges to the implementation of a green hydrogen production that can be used in Iraq and other developing countries, including technological, economic, and social problems in addition to the related policy consequences.
Creation of Stress-Resistant Mutant Forms for Rice Breeding by Irradiating Seeds with Ionizing Radiation and Treating Them with Salinity and Drought Factors
Authors: Appazov Nurbol , Kruglyak Anastasiya , Aleksiayenak Yulia , Bakiruly Kurmanbek , Zhalbyrov Aidos , Baimbetova Gulsim , Yershin Zeinolla , Gledenov Yury , Doroshkevich Aleksandr
Published: March 2023

The article presents research results of the γ-ray and fast neutrons impact on various rice species, in order to obtain mutant forms resistant to salinity (NaCl) and drought factors (sorbitol. They are going to be used as initial forms in synthetic selection when creating varieties, adapted to the stressful conditions of, both, soil and climate in the Kazakhstan Aral Sea. The average lethal doses (LD50) of γ-rays and fast neutrons, as well as the average NaCl and sorbitol lethal concentrations were established. Such environment is best suited for clear manifestation of the mutagenic effect of ionizing radiation and the resistance of rice plants to salinity and drought. A distinct dependence in the effect of ionizing radiation and stress factors on the number of induced resistant mutant forms has been related to the initial rice sort. The largest number of mutant forms was obtained from the local variety Syr Suluy, followed by Leader and AyKerim varieties. From all varieties, the number of mutants obtained from exposure to γ-rays was 43 pieces out of 4500 grains, and from the impact of fast neutrons - 115 pieces out of 2700 grains. M1 mutant plants significantly differ from the initial forms in terms of morphological features – plant height, panicle length, grain size Most plants are characterized by short growth and even dwarfism (˂80 cm). They are lodging tolerant, have short and highly sterile panicles, indicating that they are mutants and resistant to salinity, drought, or both.
Advancements in Implantable Microelectrodes: Opportunities and Risks for Neural Interface Technology
Authors: Ali Syed Adnan , Khan Rehan
Published: March 2023

Intracortical microelectrodes that can be implanted have the ability to capture fast-changing neuron action potentials in the living brain. Despite this potential, many obstacles must still be overcome for reliable, long-term, high-quality recordings and accurate analysis of brain activity. These challenges include improving recording quality, enhancing recording stability, increasing recording capacity, and adding multi-functional features. One potential approach to enhance implantable microelectrodes involves the advancement of materials, refinement of implantation methodologies, and augmentation of the number of sites for recording. However, these challenges are still being actively researched, and advancements in microelectrode technology are underway. The difficulties with implantable microelectrodes are evaluated, and solutions are presented from different perspectives. The latest advancements in microelectrode technology are reviewed and condensed, and future possibilities are explored.
The 30th International Scientific and Technical Conference “Foundry and Metallurgy 2022. Belarus” and the 5th International Conference of Suppliers OJSC “BSW – Management Company of Holding “BMС
Authors: Sadokha M. A. , Nemenenok B. M. , Konstantinov V. M. , Lipatkina T. N.
Published: March 2023

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Artifacts in metallography: etching pits
Authors: Anisovich A. G.
Published: March 2023

The article considers etch pits that appear in metals and alloys during metallographic etching as an artifact. The optical contrasting tools capabilities, such as dark field, polarized light, and differential interference contrast in detecting etch pits, are demonstrated.
Kazakhstan Study of the influence of large shear deformations and vortex flow of metal on the formation of an equiaxed ultrafine‑grained structure of the E110 zirconium alloy by the method of RSP
Authors: Lutchenko N. A. , Arbuz A. S. , Kavalek A. A. , Panin E. A. , Popov F. E. , Magzhanov M. K.
Published: March 2023

In this work, the task was to investigate the processes of microstructure change occurring in relatively large bulk bars under the action of large plastic deformations. Such large levels of deformation are usually achievable in high pressure twisting of small flat disks, but are difficult to achieve in large bulk bars. The method of radial shear rolling makes it possible to achieve comparable ultrahigh degrees of deformation (~45 mm/mm) in combination with the vortex flow of the metal. Sequential rolling of the E110 zirconium alloy was carried out under extreme conditions on 2 radial shear rolling mills with a total diameter reduction ε = 185 % and a maximum accumulated strain = 46 mm/mm. To assess the level of deformation and its distribution over the section, FEM modeling was carried out in Deform‑3D. The resulting structure was studied by electron microscopy (TEM/SEM). A detailed cross‑sectional study of the EBSD structure was performed with a resolution of 1 mm. A gradient structure with a predominance of an equiaxed ultrafine‑grained structure was found, which was not very pronounced compared to the use of smaller deformations.
On the solubility of gases in liquid casting alloys
Authors: Marukovich E. I. , Stetsenko V. Yu. , Stetsenko A. V.
Published: March 2023

It has been shown that hydrogen and oxygen atoms cannot be present in the open pores of crystal lattices of base metals of casting alloys. The solubility of gases in liquid casting alloys is a nanostructured process. Hydrogen and oxygen atoms in melts are adsorbed by basic metal elemental nanocrystals. Nitrogen dissolves in liquid iron, nickel and chromium not in atomic form, but in the composition of elementary nanocrystals and nitride molecules. After deoxidation of molten casting alloys, the main gas dissolved in them is hydrogen.
Influence of hydrogen on crystallization of cast magnesium alloys
Authors: Marukovich E. I. , Stetsenko V. Yu. , Stetsenko A. V.
Published: March 2023

It is shown that hydrogen is a demodifying element of the structure of cast magnesium alloys during their crystallization. Hydrogen atoms, adsorbing on elementary nanocrystals in melts, prevent the combination of nanocrystals into the nucleus of crystallization of α‑phase microcrystals. As a result, molds with an unmodified structure are formed. Modifiers reduce the concentration of adsorbed hydrogen in the melts of magnesium alloys. This results in the milling of α‑phase microcrystals in castings as they solidify.
Research and processing of shot blasting dust
Authors: Rovin S. L. , Kurach D. I. , Grigoriev S. V.
Published: March 2023

Dispersed iron‑containing waste makes up the majority of solid technological waste of machine‑building and metallurgical enterprises. The problem of their disposal remains open, which leads to significant economic losses and creates a serious environmental threat. About 15–20 % of these wastes are assirative dusts of melting units. The content of compounds of various metals, and primarily iron, in some of them (for example, in the aspiration dust of arc steelmaking furnaces) reaches 60–70 % or more. However, today, despite all efforts, no more than 5–7 % of the captured aspiration dust of melting furnaces is used. One of the most significant problems of its disposal is the high dispersion (the size of the dust particles of arc furnaces, as a rule, does not exceed 50 microns) and the extreme heterogeneity and instability of the granulometric and chemical composition of the dust. Therefore, in most cases, attempts to use these dusts as a technological product: additives in molding and exothermic mixtures or non‑stick paints, coloring pigment in the production of building materials, modifying additives in the melting of foundry alloys, additives in the production of cement clinker, etc., ended at the level of experimental or pilot batches and were not essential for solving problems in general. The most promising direction of utilization of aspiration dusts is the recycling of metals contained in them. This article presents the results of studies of the composition and characteristics of aspiration dust of arc steelmaking furnaces of foundries of machine‑building plants, as well as the conditions of solid‑phase reduction and extraction of iron contained in it.
Status, problems and development prospects of JSC “Uzmetkombinat”
Authors: Sultanov A. I.
Published: March 2023

JSC “Uzmetkombinat” is one of the largest metallurgical enterprises of the Republic of Uzbekistan. Along with the main products – long products from ferrous and non‑ferrous metals of various assortments, steel grinding balls, ferroalloys, the plant also produces heat‑insulating materials, consumer goods and other products. JSC “Uzmetkombinat” is a developing enterprise – year after year it increases its production capacity, opens new production facilities and increases the range of products. This article provides information about the plant, the range of products, production indicators for previous years and targets until 2026, as well as ways to achieve them.
About the problems and results of obtaining products from technical ceramics for metallurgical production. Message 1
Authors: Panteleenko F. I. , Popov R. Yu. , Shmuradko V. T. , Samsonova A. S.
Published: March 2023

The article presents the research’s results in the field of multifunctional ceramic materials synthesis for metallurgical, machine‑tool and other branches related to the metal treatment, their alloys and products from them; current trends and tendencies associated with the production of goods from such materials. The information on expanding the local raw material sources for the production of ceramics with the involvement of local enterprises is provided. In addition, the prospects for the industrial potential development to produce such goods are observed.
Obtaining mechanically fused modifying ligatures with a high content of alloying component for the production of chrome bronzes
Authors: Lovshenko F. G. , Lozikov I. A.
Published: March 2023

The paper presents the results of a study of the regularities of the formation of granulometric composition, structure and properties of modifying ligatures with a high content of alloying component for the production of chrome bronzes. The kinetics of changes in the physico‑mechanical properties of granular compositions depending on the temperature in the grinding chamber and the ratio of the volume of working bodies to the volume of the charge has been studied. The results of the topography of granules and their structure are presented, showing that the granules obtained according to the optimal mode of mechanical fusion are dense bodies with microinclusions of chromium, the maximum size of which does not exceed 15–20 microns.

Based on the results of thermodynamic modeling, thermodynamically justified refractory compounds synthesized in the process of obtaining a ligature have been established, which should effectively perform the role of modifiers of the first kind, ensuring the production of bronzes with a sub‑/microcrystalline type of base structure.

The processes of compacting mechanically fused compositions were optimized and the influence of the main technological factors – the heating temperature of cold‑pressed briquettes and the extraction coefficient during hot pressing on the physical and mechanical properties of compact materials was investigated. The results of studying the structure and properties of the most promising Cu – 20 %Cr composition are presented, which make it possible to identify its microcrystalline type, which persists after prolonged high‑temperature exposure during the processing of the granular composition into a semi‑finished product, and to conclude about the dispersed nature of its hardening, which additionally confi ms the data of thermodynamic modeling on the possibility of mechanical synthesis of nanocrystals of refractory compounds to perform the role of modifiers.

According to the results of the research, a comparative analysis of the properties of the developed ligature and beryllium bronze was performed, establishing the possibility of its use as an independent material for electrical purposes.
Detailed Geoseismic Structure of the Riphean Deposits in Buolkalakh–Lena Area Based on Deep Drilling and Seismic Exploration Data
Authors: Lezhnin D.S. , Maslennikov M.A.
Published: March 2023

—The work considered an integrated approach to the study of deep-lying Riphean strata of the Buolkalakh–Lena region, which have certain prospects in terms of oil and gas potential. The method of revision and synthesis of acoustic and density logs is described in detail using the example of wells drilled in 80–90 for the purpose of correct reference to seismic sections. It has been shown that the Khaipakh, Debengdin, Arymas, Kyutingdinsky, and Sygynakhtakh formations of the Early and Middle Riphean eras overlook the pre-Permian surface in the middle part of the Lena–Anabar trough. The region also developed older Riphean deposits that are not exposed on the Olenek uplift and are not studied by deep drilling. The prospects for the oil and gas content of Riphean strata in the region are mainly associated with carbonate reservoirs formed in the top of the Riphean sequence and cropping out on the pre-Permian erosive surface, the most promising rocks are those constituting large carbonate platforms that were partially eroded and subjected to processes of hypergenesis and karst formation.
Alegatos de la educación peruana
Authors: Dextre Chacón José Carlos
Published: March 2023

En estos Alegatos sobre la educación en nuestro país, el ingeniero y docente José Dextre Chacón fundamenta, en siete brillantes capítulos, estrategias claras para la transformación social de nuestra cultura a través de la enseñanza. Desde su amplia experiencia y trayectoria en gestión educativa, el autor, fundador de la Universidad Científica del Sur, nos comparte en este libro acciones concretas con un profundo sentido humanista. Así, en estos ensayos se presentan los valores fundamentales sostenibles tanto en la enseñanza pública como en la privada, alentando la innovación y confiando en la inversión. Estamos ante un conjunto de lúcidas reflexiones de uno de los educadores y estrategas que más ha aportado a la transformación educativa en el Perú.
Sistema de gestión documentaria y administración de información de los proyectos de investigación de la Universidad Tecnológica del Perú (UTP) en el año 2020
Authors:   , Medina Moscoso Daniel Jesús
Published: March 2023

En el presente de la Universidad Tecnológica del Perú se verifica una deficiencia en la administración de la información de los trabajos de investigación de los alumnos que están en el último ciclo y que están por egresar de las aulas de la universidad. Es sabido que los trabajos muchas veces son enviados a los correos personales de los docentes, ya que no hay un orden en el flujo de actividades para los controles del docente al alumno, también se ha visto que las fechas de presentación de avance son coordinadas por correo o por teléfono sobre todo cuando el alumno ya egresó. Por ello el presente trabajo trata de explicar la importancia de registrar, controlar y centralizar los proyectos de investigación universitaria en un sistema de gestión documentaria para los alumnos de últimos ciclos de la Universidad Tecnológica del Perú UTP y los docentes asesores de tesis.
Plan de negocios de una empresa de fumigación y desinfección - BIOFUMIG
Authors:   , Cajahuanca Mayta Jean Carlos , Palomino Huachos Rosa Stephani , Palpan Solorzano Giulianna Luz , Rojas Rafael Anita Lucero
Published: March 2023

El presente plan de negocios se crea en el año 2020 por 4 estudiantes de la carrera Administración de Empresas del IX Ciclo, es planteada en base a lo que se está viviendo a nivel nacional e internacional con la pandemia Covid-19. Biofumig está dedicada a la fumigación y desinfección, enfocándose en la zona A de Huaycan-Ate Vitarte-Lima, se realizó un análisis del entorno, tanto macro-micro entorno donde se tuvo en cuenta los competidores de la zona, llegando así a no encontrar ningún competidor o empresa similar en la zona, se realizó el análisis del cliente al que ira dirigido, un análisis estratégico, estrategias de la empresa que determinara que es lo que queremos lograr a corto y largo plazo, como debemos trabajar para lograr el objetivo que es abarcar distintos mercados así generar mayor rentabilidad, inculcando a los trabajadores a preservar el medio ambiente. Se planteó el análisis FODA donde se tuvo en cuenta Fortaleza, Oportunidad, Debilidad y Amenazas, que posteriormente nos ayudó para realizar la matriz EFI, EFE, que son de suma importancia para Biofumig ya que ayudó a identificar como se encuentra a nivel de sus competidores fuera de la zona de Huaycán. Se plantearon estrategias para el reclutamiento del trabajador, para las operaciones que nos ayudarán en el transcurso de la ejecución del proyecto. Finalmente fijamos el análisis financiero, para tener en cuenta la inversión y el retorno de esta.
Plan de negocio: Zuco verde, alimentación saludable por delivery
Authors:   , Ancajima Godoy Jhair Alexander , Atahua Vergara Karen Elizabeth , Cabrera López Andrea Alexandra , Colqui Arzapalo Abel , Linares Pérez Kathia Isabel Fiorella
Published: March 2023

El presente proyecto tiene como finalidad ver la viabilidad del plan negocio “Zuco Verde" y poder implementarlo. El objeto principal de la empresa consiste en poder ofrecer servicios de alimentación saludable mediante delivery en los distritos ubicados de la zona 7 entre ellos están Miraflores y la molina según CPI. En la actualidad se detectó un incrementó potencial en este sector de alimentos, donde los demandantes son personas que se interesan por llevar un estilo de alimentación saludable, y más aún esto se refuerza con la investigación que se realizó con fuentes secundarias y primarias, en donde se demuestra que las personas optan por un mejor cuidado de la salud a través de la alimentación, debido a que la pandemia del COVID-19 ha impactado de manera negativa la salud de las personas a nivel global, especialmente relacionadas a una mala alimentación que agrava más aun el problema. Más allá de haber detectado una oportunidad de negocio, se encontró una problemática, por la cual el plan de negocio planteado tratara de fomentar un estilo de vida saludable, no solo de un momento, sino para toda la vida. Estos se verán reflejado positivamente en cifras económicas, sociales y ambientales, que no solo se beneficiara el negocio, sino el entorno general. Esto reflejara nuestro compromiso con la RSE, que hoy en día es muy importante para la sociedad.
Impacto del servicio de la asesoría financiera en los clientes de las micro y pequeñas empresas, Lima, 2019
Authors:   , Reyes Quispe Juberth Samuel
Published: March 2023

En la actualidad se hace necesaria la obtención progresiva de conocimiento sobre los distintos elementos que componen y rigen la asesoría financiera, y eso ha originado que se debatan estudios profundos con relación a esto. Por lo que el motivo fundamental de la presente investigación es dar respuesta a esta necesidad, y, además, aumentar el nivel de conocimiento teórico y empírico en relación a los servicios de asesoría financiera, y de esta forma poder establecer un debate posterior con un asesor financiero profesional y un consumidor de este particular. El trabajo comprende una extensa revisión de los antecedentes y teoría relacionada al tema, la cual muestra que existen aspectos importantes de los servicios de asesoría financiera que se han descuidado anteriormente. Las características tanto de los consumidores como de los asesores, según se analizan en el aspecto de género, demuestran una importancia tanto para las percepciones de los consumidores como para los asesores de diferentes aspectos de los elementos centrales de los servicios de asesoría financiera. En este sentido, es necesario establecer los más profundos parámetros que rigen una relación entre un asesor financiero y un cliente final que requiere este servicio con la finalidad de evidenciar la relevancia que posee, y poder establecer a ciencia cierta cuales son los requerimientos que un cliente tiene al momento de solicitar este tipo de servicios y cuáles son los elementos fundamentales que debe cubrir un asesor para poder satisfacer las necesidades de asesoría al cliente. Así pues, existen dos tipos de actividades que no son consideradas como una relación para los clientes finales.
Principales tumores epiteliales cutáneos en caninos
Authors:   , Zapata Castro Mitchel Luciana
Published: March 2023

Principales tumores epiteliales cutáneos en caninos Mitchel Luciana Zapata Castro 78009494 En la presente monografía se realiza una revisión bibliográfica de los tumores epiteliales cutáneos que afectan principalmente a los caninos domésticos. Estas patologías se encuentran en ascenso en nuestro país, debido al amor hacia nuestras mascotas, lo que conlleva a una mayor esperanza de vida. Un perro geronte es propenso a presentar tumores, estos pueden ser benignos o malignos, por tanto, los propietarios buscan un diagnóstico rápido y tratamiento eficaz. Los tumores epiteliales cutáneos más comunes a nivel nacional son el carcinoma de células escamosas, papiloma escamoso, adenoma de glándulas sebáceas, adenoma de glándulas perianales y tricoepitelioma, de estos se explicarán su localización y presentación más común, edad frecuente en aparición, predilección racial y morfología citológica e histológica.
Efecto de enjuagues bucales pediátricos en la estabilidad del color de las restauraciones dentales con resinas compuestas. Estudio comparativo in vitro
Authors:   , Martínez Ccahuana Lizbeth
Published: March 2023

Efecto de enjuagues bucales pediátricos en la estabilidad del color de las restauraciones dentales con resinas compuestas. Estudio comparativo in vitro. C.D. Lizbeth Martínez Ccahuana 46911909 Objetivo. El objetivo del estudio fue evaluar in vitro el efecto de tres enjuagues bucales pediátricos en la estabilidad del color de tres resinas compuestas diferentes. Métodos. Se prepararon ciento treinta y dos muestras en forma de disco (n =132), cuarenta y cuatro por cada tipo de resina compuesta (n=44), los valores iniciales de color se midieron con un espectrofotómetro. Se colocaron once (n= 11) muestras en cada sustancia de inmersión, 3 tipos de enjuagues bucales pediátricos y agua destilada como control, se llevaron a la incubadora a 37° C por una hora (equivalente a 1 mes de uso de enjuague bucal) y se realizó la medición de color. Se obtuvieron valores de cambio de color (ΔE *) y los resultados fueron analizados estadísticamente. Resultados. Todas las muestras de resina compuesta presentaron cambios de color después de la inmersión en las soluciones utilizadas. La ΔE* observada mostró que los enjuagues bucales pediátricos tienen un efecto significativo en el cambio de color de las resinas compuestas probadas. El grupo de las resinas Nanohíbridas presenta niveles inferiores de cambio de estabilidad de color (ΔE * = 4.63), seguido de las resinas de grandes incrementos (ΔE*= 5.70) y por último las resinas de Nanopartículas presentan mayor cambio en la estabilidad de color (ΔE *= 5.84). Conclusión. Todos los materiales restauradores de resina compuesta utilizados mostraron una diferencia de color después de la inmersión en los 3 diferentes enjuagues bucales y en el agua destilada.
Eficacia y seguridad del bloqueo del nervio occipital mayor en pacientes con migraña crónica: revisión sistemática con metaanálisis y análisis secuencial de ensayos clínicos
Authors:   , Cárdenas Baltazar Elena Cristina
Published: March 2023

Objetivos: Evaluar la eficacia y seguridad del bloqueo del nervio occipital mayor (BNOM) comparado con placebo en pacientes con migraña crónica. Metodología: Se realizó una revisión sistemática de la literatura en las bases de datos Medline, Scopus y Web Of Science desde marzo hasta octubre de 2019, en donde se incluyó ensayos clínicos aleatorizados (ECA) y estudios observacionales. El riesgo de sesgo fue evaluado mediante la herramienta ROB2 y la certeza de la evidencia usando GRADE, asimismo, el modelo de efectos aleatorios fue empleado para la realización del metaanálisis y se efectuó un análisis secuencial de prueba para cuantificar la confianza estadística. Resultados: En comparación con el placebo, la intervención de BNOM con bupivacaina produce una reducción significativa de la frecuencia de cefalea luego de una semana. Asimismo, se asoció a un promedio menor en el número de días y en la intensidad de cefalea al final del primer mes de seguimiento. No tuvo un mayor beneficio que el placebo con respecto al número de días de consumo de medicación de rescate. Finalmente, se presentó un número menor de eventos adversos en el grupo con BNOM y ningún evento adverso serio luego de su aplicación. No se estimó la reducción de intensidad de cefalea por falta de datos. Conclusiones: La evidencia disponible muestra que el BNOM con bupivacaina es eficaz y seguro en pacientes con migraña crónica a corto plazo comparado con placebo.
Relación entre las técnicas de marketing dirigido a niños y niñas en etiquetado y el contenido de nutrientes críticos en productos procesados y ultra procesados expendidos en Perú
Authors:   , Torres Schiaffino Daniella
Published: March 2023

El consumo de alimentos ultra procesados ha ido aumentando de forma alarmante, representando un riesgo para la salud de los niños. Diferentes técnicas de marketing para niños (M2K) utilizadas en el etiquetado de alimentos están influyendo en las decisiones de compra de estos productos. El siguiente estudio tiene como objetivo proporcionar información útil sobre el M2K que se encuentra en el etiquetado de productos alimenticios vendidos en una cadena de supermercados en Lima, Perú y determinar su relación con el contenido de nutrientes críticos. Este fue un estudio observacional, correlacional y descriptivo. Los datos se recolectaron fotografiando la cara frontal (FoP) de 2747 etiquetas de productos vendidos en tres supermercados de Lima, evaluándose solo aquellos que cumplieron con todos los criterios de inclusión (n = 1092). Se encontró relación entre el uso de técnicas de marketing dirigido a niños y el nivel de nutrientes críticos con respecto a las grasas saturadas (RP = 0,56; IC95%: 0,52–0,63), azúcar total (RP = 1,70; IC95%: 1,64–1,77), y sodio (RP = 1,05; IC95%: 1,03-1,07). Particularmente con el azúcar, la presencia de M2K representó un factor de riesgo. Nuevas políticas regulatorias para el uso de estas técnicas en el etiquetado de alimentos deben ser implementadas, para poder así mejorar la salud de los niños a nivel poblacional.