bluuebunny/crossref_metadata_2025 huggingface dataset:
PHILOSOPHICAL IDEAS OF PANTELEIMON KULISH IN OUR TIME
Authors: Ruban Oleksandr
Published: June 2020

The article is devoted to the analysis of the creative heritage of Panteleimon Kulish in the context of modern realities. Scientific work of Panteleimon Kulish is extremely wide. It includes the general concept of Ukrainian culture and language, the problems of development of the Ukrainian nation, its mentality and historical mission. The proposed article deals, first of all, with the problem of personal orientation of the author related to the "internal" and "external" in human, in his mind and heart. Panteleimon Kulish was not a single researcher who drew attention to the mental feature of Ukrainians in the juxtaposition of heart and mind, feelings and logic. The mental character of such a struggle continues in the opposition to the "city" and "countryside" as an embodiment respectively of civilization and culture. The culture appears for P. Kulish to be something sacred, ancestral and spiritual, which, in fact, creates an inner person. It is argued that in a certain sense the orientation of the movement of civilization and culture is diametrically opposed. Since civilization tends to unify and standardize, culture focused on spiritual potentials, tends towards individuality and uniqueness. Globalization, as a civilization movement leads to integration of the processes and the transformation of national culture towards its unification. The main idea of Kulish reflections during his whole life was an attempt to preserve the national identity of the Ukrainian people, their language and culture, customs and traditions and, at the same time, to involve Ukrainians into the European community. Therefore, the fears of Panteleimon Kulish, concerning civilization pressure on the national culture have undeniable reasons. Finally, the author of the article turns to Kulish thoughts about the problem of the personality of human, his destiny, his national way of life, and also the problems of self-knowledge.
THE PROBLEM OF BULLING IN THE MODERN EDUCATIONAL ENVIRONMENT AND THE WAYS OF ITS OVERCOMING
Authors: Sorochuk Liudmyla
Published: June 2020

The problem of the emergence of bullying in the educational area among school-age children is investigated, since in recent years in Ukraine the bullying (baiting) has often been referred to as a negative phenomenon. A brief analysis of modern scientific investigations on the problems of bullying in the educational environment is done, which shows the necessity of a detailed and systematic study on this problem. Bulling is seen as a conflict and widespread phenomenon in children's groups, which can cause a negative impact on formation of personality, difficulties in socio-psychological adaptation, complexity and uncertainty of a young person in choice of next career. It has been noted that numerous facts of child abuse have caused attention to this phenomenon and implementation of specific steps at the state level to counteract and prevent this problem. It is emphasized that the presence of bullying in the educational environment has a negative impact not only on the victim of persecution, but also on the perpetrators (abusers, observers) as well as on parents and teachers. Emphasis is placed on the necessity of coordinated work of educational institutions, school psychologists, social educators, lawyers, parents to overcome bullying, which, respectively can reduce the manifestation of this negative phenomenon and greatly improve the resolution of conflict situations. Finding peaceful ways to resolve conflict situations, upbringing of friendly relationships between children and assimilate moral values leads to a healthy psychological climate in the children's groups, educate the respect and mutual assistance among coevals. There are a number of methodological recommendations for organizing the educational process, conducting cultural events, leisure, extracurricular work, outdoor activities, which help to prevent such a negative phenomenon of our reality. It is concluded that the joint work of relevant state institutions, educators, lawyers, psychologists, parents, media representatives, using different methods of influence on the individuals, may provide conditions for resolution of conflicts and overcoming bullying among children and school youth.
THE LOGIC OF ETHICAL COGNITION: SELF-OVERCOMING
Authors: Brodetska Yulia
Published: June 2020

The article focuses on the consideration of ontological aspects of harmonious individual and social being and their realization in the space of the individual existential nature. Internal conflict, the individual confrontation, unfolds mainly in the field of ethical knowledge around the concepts of the «good and evil». Both metaphysical principles of «good» and «evil» reproduce the binary opposition of «being / nothingness», «creation / destruction», «conflict / harmony». In the space of human existence, the internal conflict, arises to the problem of misunderstanding between good and evil. Therefore, the internal solution of the conflict and the overcoming of the internal evil presupposes the existence of good as an absolute ethical universality, which is revealed to man only in the process of self-knowledge. It is revealed, that unlike to the cognition of environment, the principles of self-cognition are metaphysical. These principles open themselves in the knowledge of heart, which is able to penetrate into the very essence of human existence and to reveal its uniqueness. In other words, knowing oneself does not imply the knowledge accumulation that provides the possession of knowledge and their usage for own purposes. In the format of self knowledge, «knowing» good means «being» its bearer, letting it in and bringing it into the world. Therefore, in the process of self-knowledge, the meanings are acquired only by knowing the good ethics, and understanding the difference between good and evil. However, even these ethical principles gain value only when they are transformed from the sphere of theory into practice, that is, the human experience of life is its virtues. Thus, to know oneself means to know in oneself that creative potential, a gift that makes a person unique and valuable. Therefore, through knowing and overcoming the negativity (flaws, sins, desires, illusions), one can come to yourself as real and sincere. On the path from evil to good man discovers knowledge of himself, the only center of which is his heart. It is it that teaches us to accept our neighbor, to treat ourselves from the standpoint of help, support, non-competition, envy, aggression. Thus, the potential of the cognitive capacity of the heart to convert evil into good is the most optimal. Because it involves elements of higher, sacral spheres in the knowledge structure. This is the difference between cardiac and rational cognition, work-related brain apparatus, characterized primarily by the processing of information transmitted by external senses. It is a perspective of research that is revealed in contemporary philosophical discourse as the knowledge of the heart that overcomes the boundaries of self-dictates.
WAYS OF OVERCOMING OF SOCIO-CULTURAL CONFLICTS IN THE PROCESS OF INTEGRATING OF INTERNALLY DISPLACED PERSONS INTO NEW TERRITORIAL COMMUNITIES
Authors: Hazizova Olena
Published: June 2020

The study considers specifics of sociocultural integration and adaptation of internally displaced persons (IDPs) in new territorial communities. As a result of the military and political conflict caused by the armed aggression of the Russian Federation, Ukraine since 2014 has been facing the problem of mass internal migration. The investigation of differences in values, socio-cultural attitudes and expectations of hosting communities in regard to IDPs (and vice versa, those of IDPs in regard to hosting communities) is important, as these attitudes and expectations significantly influence socio-cultural and overall communal atmosphere. The knowledge of socio-cultural moods and expectations of these social subjects serves as a scientific ground for the support of well-balanced relations between IDPs and hosting communities, including prevention of conflicts related to the discrimination of forced migrants. Adaptation of IDPs to the life in new communities depends on the reality of their expectations: both high and low, they negatively influence the process of adjusting to the new environment. It must be noted that most public and private initiatives aimed at helping IDPs have been successful, although such activities have been unsystematic, spontaneous, occasional, and fragmented. The sufficient level of satisfying of social, educational, and cultural needs is an important factor in adaptation of IDPs in new places of residence. This is especially indicated by school enrollment and psychological assistance provided to families with children. Most forced internal migrants state that employment constitutes for them the key problem, sometimes even greater than that of accommodation and social protection. Usually, such reasons for employment denial are mentioned: unwillingness to hire a person returned from the ATO zone due to their mental differences and mal-adaptation to local conditions. Thus, an account for sociocultural needs and value priorities as of IDPs so of local residents in the public and social life of the territorial community will have a positive influence on the overcoming of problems arising in the process of integration and adaptation of IDPs to their new life; prevent conflicts; increase the level of communication, and, in a larger sense, facilitate national unity and reconciliation.
Systems approach to the study of microbial methanogenesis in West-Siberian wetlands
Authors: Kotsyurbenko Oleg Rollandovich , Glagolev Mikhail Vladimirovich , Sabrekov Alexander F , Terentieva Irina Evgenievna
Published: June 2020

This work is a lecture adapted to the format of a journal article on the course "Modern Topics in Biology", delivered by one of the authors in Yugra State University.
The modern stage of the development of science and biology, in particular, is characterized by a systematic approach to the evaluation of various phenomena. In the concept of hierarchical holism, which dominates the systems approach, various biological systems form a hierarchical structure in which an element of one system is an independent system of a lower level. In any individual system, the key points are the interaction of its components and the structure that determines the stability of the system. The microbial systems of wetlands in West Siberia play a crucial ecological role in the context of the problem of greenhouse gases and changes in climate and atmospheric composition. The greenhouse gas methane entering the atmosphere is formed by the methanogenic microbial community, which is a complex biological system containing microbial groups which are closely related to each other by trophic interactions. The result of the work and the efficiency of the methanogenic microbial community is also determined by various physicochemical parameters of the environment. The main microbial agents responsible for the production of CH4 are methanogenic archaea, which are divided into three main trophic groups. The application of a systematic approach to the study of the methane cycle in wetlands of West Siberia allows us to comprehensively evaluate the vertical and horizontal system relationships, identify key elements and conduct a complex analysis of the problem under study.
Decomposition rate of peat-forming plants at the initial stages of destruction in peat deposits of the oligotrophic bogs “Bakcharskoe” and “Timiryasevskoe”
Authors: Nikonova Liliya Garifullovna , Golovatskaya Evgeniya Aleksandrovna , Tereshchenko Natalia Nikolaevna
Published: June 2020

The research presents quantitative estimates of the decomposition rate of plant residues at the initial stages of the decay of four plant species (Eriophorum vaginatum, Carex rostrata, Sphagnum fuscum, Sphagnum angustifolium) in peat deposits of the oligotrophic bogs in the southern taiga subzone of Western Siberia. We also studied the change in the content of total carbon, nitrogen and ash elements in plant residues and the activity of microflora at the initial stages of decomposition. The studies were conducted in the bogs characterized by various hydrothermal conditions. At the initial stage of the decay of peat-forming plants the maximum losses of mass occur in the first month of the experiment and reach 36-52% of the total loss of organic matter during the growing season. Sphagnum fuscum is the most resistant to decomposition. The most intense decomposition of Sphagnum fuscum at the initial stages of decomposition is characteristic for warmer and less humid conditions of the Timiryazevskoe bog. It was revealed that mass losses of organic matter correlate well with total carbon losses. The most intensive decreasing of the total carbon content as well as mass loss of organic matter are observed after the first month of the experiment. The maximal decline of carbon in plant residues was received for Eriophorum vaginatum. During the decomposition of plant residues, the nitrogen content was decreasing, and the most intense nitrogen losses were characteristic for Sphagnum mosses. Nitrogen loss in peat-forming plants during the first month of decomposition varies depending on the locality conditions, but it becomes equal during the later decomposition stages. At the first stages of decomposition of plant residues, both the accumulation and the loss of ash elements were observed in the samples. Both the Bakcharskoe and Timiryazevskoe bogs were characterized by the accumulation of ash elements in plant samples of Eriophorum vaginatum. Dynamics of mass loss and removal of elements are directly related to the activity of microorganisms. The maximum number of microorganisms was found in July and September. Peat and plant samples located in the peat deposit of the Timiryazevskoe bog are more saturated with microorganisms of the nitrogen cycle, and samples from the Bakcharskoe bog are richer in carbon cycle microorganisms. Microorganisms of the lignocellulosic complex were less active as compared with other groups of microorganisms. The number of microorganisms assimilating the mineral forms of nitrogen are on average 1.5 times less than the number of microorganisms assimilating the organic forms. The positive correlation between the nitrogen content and the number of fungi was found. In addition, correlation between the numbers of denitrifiers and oligotrophs was found. It is explained by trophic relationshipsbetween these groups of microorganisms.
Correlation between Ambient Seismic Noises and Economic Growth
Authors: Hong Tae-Kyung , Lee Jeongin , Lee Giha , Lee Junhyung , Park Seongjun
Published: June 2020

Human activity is a major source of high-frequency seismic noise. Long-term ambient seismic noise levels and their influencing factors are investigated. The diurnal seismic noise level in 5–15 Hz display high correlation with human activities including traffic and industrial operations that are related to economic conditions. The temporal noise-level variations are consistent among three components. Analysis with seismic noises in three consecutive months of each year enables us to estimate the noise levels without seasonal effects. The daytime seismic noise-level changes in major cities of 11 countries are assessed using the 3 month records for decades. The annual seismic noise levels present strong correlations with gross domestic product (GDP), particularly with manufacturing and industrial GDP. The seismic noise levels increase quickly with GDP in low-GDP regions but slowly in high-GDP regions. This is because high-GDP regions already have large volumes of existing noise-inducing sources and because added sources contribute weakly. The seismic noise levels increased by 14%–111% for 5–23 yr depending on the economic conditions. The correlation between ambient seismic noise level and economy growth is a global feature. The high-frequency noise level may be a proxy to present the economic condition. Economic growth affects the Earth environment in a wide range of aspects.
O współzależnościach prawa publicznego i prywatnego w regulacjach gospodarczych na przykładzie systemu oceny zgodności wyrobów – kilka refleksji
Authors: Żywicka Agnieszka
Published: June 2020

W artykule zaprezentowana została instytucja systemu oceny zgodności z wymaganiami jako przykład hybrydowej instytucji prawnej, której konstrukcja opiera się na normach publicznoprawnych i prywatnoprawnych. Autorka zanalizowała współzależność regulacji publicznoprawnych i prywatnoprawnych w rozwiązaniach zawartych w ustawie z dnia 13 kwietnia 2016 r. o systemach oceny zgodności i nadzoru rynku.
Ograniczenia podmiotowe w procedurze sądowej kontroli miejscowego planu zagospodarowania przestrzennego w kontekście ochrony własności nieruchomości – wybrane zagadnienia
Authors: Ostrowska Anna
Published: June 2020

Dla przyznania jednostce ochrony sądowoadministracyjnej konieczne jest zaistnienie związku pomiędzy jej sytuacją a normą prawa materialnego bądź procesowego. Na tle sądowej kontroli miejscowego planu zagospodarowania przestrzennego, który w imię ładu przestrzennego i zrównoważonego rozwoju ogranicza prawo własności nieruchomości, kluczowym zagadnieniem jest prawo właściciela nieruchomości do ochrony jego interesów poprzez uruchomienie tej kontroli bądź wzięcie udziału w postępowaniu sądowym wszczętym z inicjatywy innego podmiotu. W doktrynie najczęściej porusza się kwestię legitymacji skargowej właściciela nieruchomości w kontekście sporów na tle wykładni art. 101 ust. 1 ustawy z dnia 8 marca 1990 r. o samorządzie gminnym. Znacznie mniej miejsca poświęca się natomiast równie istotnemu zagadnieniu dopuszczalności udziału uczestników na prawach strony w postępowaniu w sprawie skargi na miejscowy plan zagospodarowania przestrzennego. Stanowi ono wycinek szerszego problemu ochrony interesu prawnego w postępowaniu sądowoadministracyjnym w sprawach skarg na uchwały organów jednostek samorządu terytorialnego.
TINGKAT KEPEDULIAN IBU TENTANG LITERASI MEDIA ANAK USIA DINI BERDASARKAN GEOSOSIAL
Authors: Munawarah Izzatul , Samawi Ahmad , Aisyah Eny Nur
Published: June 2020

Mother's concern for good  and correct media literacy for early childhood is very important. This attitude can also be analyzed for high and low levels and sought for differences if seen from geosocial factors. Researchers examined mothers based on significant differences between villages and cities in Malang. The research method used is comparative quantitative research. The comparative test in this study used the Independent T-Test which calculations using Microsoft Excel 2010 for Windows 10. The results of a comparative test with a total of 80 samples showed the conclusion that the level of maternal concern for AUD media literacy was not influenced by geosocial. But there are differences in the percentage of each aspect of the caring factor that needs to be considered, namely the highest percentage is in the aspect of understanding while the habituation aspect becomes the lowest aspect of the percentage. Although not influenced by geosocial factors, this can be one of the new problems for other researchers to further examine the causes and solutions of the inconsistencies between aspects of understanding and habituation in the attitude of maternal care for media literacy in early childhood.Kepedulian ibu dalam literasi media yang baik dan benar bagi anak usia dini adalah sangat penting. Sikap ini juga dapat dianalisis tingkat tinggi rendahnya serta dicari perbedaannya jika dilihat dari faktor geososial. Peneliti meneliti para ibu berdasarkan perbedaan signifikan antara desa dan kota di Malang. Adapun metode penelitian yang digunakan adalah penelitian kuantitatif komparatif. Uji komparasi dalam penelitian ini menggunakan Independent T-Test yang penghitungannya menggunakan Microsoft Excel 2010 for Windows 10. Hasil dari uji komparasi dengan total 80 sampel menunjukkan kesimpulan bahwa tingkat kepedulian ibu terhadap literasi media AUD tidak dipengaruhi oleh geososial. Namun terdapat perbedaan persentase pada setiap aspek dari faktor kepedulian yang perlu diperhatikan yaitu persentase tertinggi ada pada aspek pemahaman sedangkan aspek pembiasaan menjadi aspek yang terendah persentasenya. Meskipun tidak dipengaruhi oleh faktor geososial, hal ini dapat menjadi salah satu permasalahan baru bagi peneliti lain untuk diteliti lebih lanjut penyebab maupun solusi dari ketidaksinkronan antara aspek pemahaman dengan pembiasaan dalam sikap kepedulian ibu terhadap literasi media anak usia dini.
The Effects of Biofertilizers on Some Physological Responses in Heritage Raspberries
Authors: BALCI Gülden , KELES Hakan , CAKMAKCI Ramazan
Published: June 2020

Raspberry, which belongs to the genus Rubus of the Rosacea family, is an important berry fruit with economical potential due to its benefits in terms of human health and wide usage area in industry. In this study, the effects of biological fertilizers (PGPR and mycorrhiza) on some chemical properties of Heritage raspberries were investigated. For this purpose, chlorophyll, anthocyanin, total phenolic content, proline, total carbohydrate levels of plant leaves were evaluated. The highest chlorophyll and anthocyanin contents were obtained from BF5 and BF4 bacterial inoculations (37.24 and 37.85 and 5.58 and 5.14, respectively). The effect of applications on total carbohydrate content was not significant. The highest phenolic and proline contents (2.94 GAE mg g-1 and 0.091 proline g-1) were obtained from BF5 treatment. The results indicated that bacterial applications were the first application in terms of the parameters examined for Heritage raspberry cultivation in the region.
To study the effect of iv dexmedetomidine versus iv labetalol for the suppression of sympathoadrenal response to extubation
Authors: S Sindhu , Srinivas V Y
Published: June 2020

Tracheal extubation evokes various degrees of disturbances in the autonomic nervous system in the form of tachycardia, hypertension which can cause deleterious consequences in susceptible patients.

Hence this study was conducted between iv Dexmedetomidine and iv Labetalol to compare their effectiveness in the suppression of haemodynamic response to tracheal extubation.

60 participants aged between 18-55 yrs belonging to ASA 1 or 2 were randomly allocated into 2 groups. Group Dd received injection Dexmedetomidine 0.6mcg/kg iv and Group Ll received injection Labetalol 0.25mg/kg body weight. Heart rate, systolic and diastolic blood pressure were recorded at baseline, 2,5,8 minutes after drug infusion, at extubation and 1,3,5,8,10 and 15 minutes post extubation.

Group Dd showed a better decrease in heart rate, systolic and diastolic blood pressure at extubation, and 15 minutes post extubation compared to Group Ll.

Injection Dexmedetomidine 0.6µg/kg showed a better attenuation of sympathoadrenal response to extubation compared to injection Labetalol 0.25mg/kg.
Bolus dose versus fractionated dose injection of hyperbaric bupivacaine in spinal anaesthesia among adult patients undergoing lower limb surgery: A prospective study
Authors: Ahluwalia Pallavi , Srivastava Nakul , Jheetay G S , Singh Gurpartap
Published: June 2020

Spinal anaesthesia (SA) with bolus dose has rapid onset but rapid onset may precipitate hypotension. If local anaesthetic is injected in fractions with some time gap, it may provide dense block with haemodynamic stability and prolonged duration of analgesia. We aimed to compare bolus dose with fractionated dose in SA for haemodynamic stability and duration of analgesia in patients undergoing lower limb surgery.

After the Institutional Ethics Committee clearance, the study was carried out in sixty patients undergoing lower limb surgery. Patients were divided into two groups. Group B patients received single bolus SA with injection bupivacaine heavy (0.5%), 3 ml and Group F patients fractionated dose with two-third (2ml) of the total dose of injection bupivacaine heavy (0.5%) given initially followed by one- third (1ml) dose after 90s. Time of onset and regression of sensory and motor blockage, intraoperative haemodynamics and duration of analgesia were recorded and analysed with Student’s unpaired t-test. Result: Patients were more haemodynamically stable in Group F as compared to Group B. Five patients in Group F and ten patients in Group B required vasopressor. Duration of sensory and motor block and duration of analgesia were longer in Group F compared to Group B.

Fractionated dose of SA provides greater haemodynamic stability and longer duration of analgesia compared to bolus dose.
Comparison of dexmedetomidine with ketamine for their effects on amplitude of motor evoked potential intraoperatively
Authors: Soni Vibha , Sachdev Sudhir , Sisodia Ravindra , Jethava Durga
Published: June 2020

Intraoperative motor evoked potential monitoring is commonly used during spinal surgeries as it reduces incidence of neurological damage and have better post-operative neurological outcome.

Anaesthetic agents cause a dose dependent inhibition of evoked potential responses while ketamine and dexmedetomidine are said to have minimal effect. We planned this study to compare effect of dexmedetomidine and ketamine on MEP.

All patients induced using glycopyrrolate, fentanyl, propofol and no anxiolytics and intubated with succinylcholine 2mg /kg, maintenance done with propofol infusion@ 60 mg/hr in both groups. Group-D- received dexmedetomidine 0.5mg/kg and Group-K- received ketamine 0.6mg/kg in 100ml NS over a period of 10mts.Electrodes were placed above the level of surgical intervention for MEP and TOF recording.

Baseline MEP recorded and after completion of infusion of the study drugs was taken as 0 min, then the MEP was recorded at every 5 min till 30 min.

In our study we observed that amplitude of MEP was statistically significant (p value 0.009 at 15 minutes) and was higher in ketamine group than dexmedetomidine group.

We concluded that both agents are equally good as they cause minimal depression and are equally efficient in measuring the amplitude of MEP.
Magnetic Field-Dependent Reversal Effect of the Electromagnet- Induced Normal Stress of Magnetorheological Materials
Authors: Liu Taixiang , Xu Yangguang , Yang Ke , Yan Lianghong , Huang Beicong , Zhang Zhuo , Jiang Xiaodong , Yan Hongwei
Published: June 2020

Magnetorheological (MR) materials are a type of magnetoactive smart materials, whose physical or mechanical properties can be altered by applying a magnetic field. In usual, MR materials can be prepared by mixing magnetic particles into non-magnetic matrices. In this work, the electromagnet-induced (or non-uniform magnetic field-induced) normal stress of MR materials is studied. It shows that the stress does not vary monotonically along with the enhancement of the applied magnetic field. There exists a field-dependent reversal effect of the variation of the stress. The reversal effect is thought resulting from that the ratio of interparticle repellent of parallel magnetic particles to the particle-electromagnet attraction gets enlarged along with the enhancement of the field.
The Progress of Composites with High Thermal Conductivity and Electromagnetic Shielding
Authors: Liu Houbao , Fu Renli , Dong Weisong , Song Yingjie , Zhang Hao
Published: June 2020

As electronic components develop toward high power, high package density, and device size miniaturization,  heat dissipation and electromagnetic interference between electronic components are becoming more and more serious. In order to solve the adverse elec  tromagnetic waves and heat radiation generated by electronic devices, people have high hopes for electronic packaging materials with high thermal conductivity and electromagnetic interference resistance. This paper summa  rizes the research status of high thermal conductivity composite materials and electromagnetic shielding composite materials. Finally, the latest research results of high thermal conductivity and electromagnetic shielding composites are introduced, and the future development trend of new materials for microelectronic packaging is prospected.
Hausmannian Buildings Rehabilitation and Strengthening
Authors: Cardoso Rui , Paiva Anabela
Published: June 2020

Hausmannian buildings architecture spreads throughout the city of Paris. These buildings were constructed in the 19th century, being presently centenarians. However, they present several pathologies which prevent their adequate use, moreover, an update regarding users security, sound, thermal and fire requirements is, among others, urgently needed. Additionally, there is presently, in Paris, an increasing demand for hotel rooms. For those previous reasons, Hausmannian buildings are presently submitted to heavy operations related to rehabilitation, strengthening, use change and conservation. In this paper, rehabilitation and strengthening works presently carried out in those buildings are described. This description is the result of a technical survey on several Hausmannian building construction sites which occurred between 2015 and 2018. The knowledge from this study should be very useful for the development of sustainable rehabilitation and strengthening techniques and guidelines, aiming to preserve this important building heritage or similar ones existing in other countries.
Keywords: Hausmannian buildings, Rehabilitation, Strengthening, Sustainability
Numerical Analysis of Load Distribution in Joint Lines with Punched Metal Plate Fasteners
Authors: Paiva Lucas , Braz-Cesar Manuel , Paula Miguel
Published: June 2020

Wood trusses with traditional bolted or nailed connections are generally modeled as pinned joints, and the forces on the wooden members are directly transmitted to the connections by shear plane contact. Other methodologies recommend that the analysis should be done more rigorously, taking into account the wood behavior and the evaluation of stress distribution within the connection area. There is a wide range of related data to pin-type connections, but the mechanical analysis of punched metal plate fasteners (nail plates) is still under developed. Nail plate connections are capable of transfer moments, therefore, appropriated modeling should be applied. The present paper compares two methodologies for the stress distribution in the rupture lines of nail plates, using an analytical approach and a numerical method with the commercial software Midas/Gen. The results show a quantitative parity for the proposed analytical model in the case of a single joint line, but the stresses diverge in both methods for zones that presents more than one joint line.
Keywords: Timber, nail plate, structural analysis
Matlab® Algorithm to Simulate the Dynamic Behavior of an NiTi Alloy through Ansys® APDLTM Models
Authors: César Hilário Jean , Braz-Cesar Manuel , Andrade Carlos , Silva Borges Adailton
Published: June 2020

In recent years, technological advances related with the so-called intelligent materials have been exploited for problem solving in many engineering fields. In this regard, shape memory alloys (SMA) seem suitable for medical and engineering applications and many others. These alloys have the ability to return to the original form after an apparently plastic deformation by applying heat and the also ability to perform phase changes with voltage variations under a specific temperature. These properties allow the development of a hysteretic loop with energy dissipation, which can be used as  a damping element in a vibratory system. In this paper, a MATLAB algorithm was developed to create an interface with the Ansys® APDLTM software that simulate the dynamic behavior of a SMA. The software is capable to obtain the cyclical behavior of a vibratory mechanical system based on the energy dissipation properties of the SMA. The results show that the free vibration of a mass-damper (alloy) system presents the energy dissipation related in magnitude with the area of the hysteresis loop until the deformation caused by the motion which does not correspond to a voltage required to initiate the (direct) phase transformation of the material, thus reducing the displacement to a constant level.
Keywords: SMA, ANSYS APDLTM, Matlab
Hexagonal Zones in Transport Demand Models
Authors: Chmielewski Jacek , Kempa Jan
Published: June 2020

Planning the development of transport systems, as well as assessing the effects of investment activities in the field of spatial development requires the use of appropriate IT tools enabling an objective assessment of investment intentions. In the field of transport analysis, one such tool is a transport demand model. Reproduction of transport-related processes is the main role of such transport demand model. This applies to both the transport of people and goods, and includes both residential travel and visitors travelling to and within the study area. The description of the process of creation and implementation of transport demands is usually based on the assumptions in the field of places of generation and absorption of travel - i.e. sources and destinations of travel. The generalization of the mathematical description of this phenomenon introduced the concept of transport zones, which are separated homogeneous areas of the study area, as sources and destinations of trips. Practice in the construction and use of transport models indicates that the problem of  defining transport zones requires further investigation. Increasingly extensive transport infrastructure data collected in open databases (such as OpenStreets) are encouraging a change in the approach to the problems of constructing transport zones. The current solutions are characterized by a high level of generalization of sources and destinations rather than detailed transport analysis. This article presents the author’s method of dividing the study areas into transport zones based on a uniform hexagonal system, explaining the basic assumptions and evaluating the pros and cons of this proposed system.
Keywords: Transport, Demand models, Algorithms
State of the Art - Ergonomics and Modeling of Functional Clothing Products with Biosignals Sensor Integration
Authors: Júlio Padez António , Gonçalo Coelho Costa Pombo Nuno , Manuel Garcia dos Santos Nuno , Madalena Rocha Pereira Maria
Published: June 2020

This literature review aims to introduce and investigate the topics addressed in the development of this project, where we assess the development of functional clothing with integration of bio-signals sensors, exploring the textile materials, ergonomics, andrometry, usability and wearability.
Keywords: Ergonomics/Andrometry, Biosignals sensors, Usability/Wearability, Conforto, Textile materials
Performance Evaluation of IEEE 802.11 ac WPA2 Laboratory Links
Authors: Pacheco de Carvalho José A. R. , Ribeiro Pacheco Cláudia F. F. P. , . Antonio D. Reis , Veiga Hugo
Published: June 2020

The increasing importance of wireless communications, involving electronic devices, has been widely recognized. Performance is a fundamental issue, resulting in more reliable and efficient communications. Security is also crucially important. Laboratory measurements are presented about several performance aspects of Wi-Fi IEEE 802.11ac WPA2 point-to-point links. Our study contributes to performance evaluation of this technology under WPA2 encryption, using available equipment (Cisco 2702i access points and TP-Link AC1900 USB 3.0 adapters). New results are given from TCP and UDP experiments concerning TCP throughput versus TCP packet length, jitter and percentage datagram loss versus UDP datagram size. Comparisons are made to corresponding results for WPA2 802.11n. Conclusions are drawn about the comparative performance of the links.
Keywords: Wi-Fi, WLAN, IEEE 802.11ac, Wireless network laboratory performance, Point-to-Point WPA2 links
Organizational and Methodological Influence of Risk Management in Projects
Authors: Francisco Gomes Diogo , Martins da Eira Dias Ana Sofia , João Feliciano Pina da Costa Abreu António , Victorovna Guitiss Navas Helena
Published: June 2020

Project risk management is essential to managers’ decision making and business success, because it allows the manager to identify, analyse  and  decide  on the most appropriate way to respond to different adversities that may arise during the development of new products, services, processes, projects, continuous improvement, etc. This requires a mind-set that risks have a major influence on the bottom line and use analytical methods or risk management software. It is essential to integrate the entire organizational structure into risk mitigation intervention. The purpose of this paper is to address some of the important topics to consider for well implemented and successful risk management. An approach is taken at both organizational and methodological levels.
Keywords: Risk management, PMBOK, Stakeholders, Methods, New product development
Airflow and Thermal Behavior within Peaches Packaging Box Using Computational Fluid Dynamics - A Preliminary Study
Authors: Ilangovan Adhiyaman , . Pedro D. Silva , . Pedro D. Gaspar
Published: June 2020

Post-harvest cold storage of peaches is an essential element to maintain the quality of the fruits without any loss. This work aims to present a CFD model, to predict airflow patterns and temperature profiles in ventilated packaging systems, during the forced-air cooling of Peaches stored in a cold chamber. Transient CFD simulations are performed for the chamber containing four ventilated boxes and the evaluation of the results show that the temperature removal near the vent holes and the hand holes is relatively high when compared to other regions of the packaging box. This preliminary study reveals the airflow behavior develop an uneven temperature distribution within the box. To overcome the flaws, future work is focused on modifying the vent hole design to improve the airflow phenomenon to maintain the temperature homogeneity throughout the box.
Keywords: Peach, Computational fluid dynamics, Airflow, Heat transfer, Packaging
Passengers Comfort Perception and Demands on Railway Vehicles: A Review
Authors: Filipa Pinheiro da Silva Patrícia , Mendes Joaquim
Published: June 2020

Trains are becoming a popular way of transportation driven by comfort and ecology reasons. Latest statistics showed an increasing of 40% on the number of passengers in the last decade. The development of new high-speed trains promoted an evolution on the coaches interiors, as to make railway transportation more attractive. To cope this objective, new requirements were set, namely high levels of comfort and safety. In complement, multiple long-term ride comfort evaluation methods have been developed. The aim of this work is to present a review on the passengers’ comfort perception    in railway vehicles. The standards ISO 2631, EN 12299 and the Sperling’s method are the most used ones. They refer several factors, as the vibration (level, frequency and duration), temperature, noise and area of the train per capita. Additionally, the perception of reduced accidents delayed the studies of passive security. Therefore, recent works focus on reducing the consequences of the second impact in case of accident and minimize the biomechanics injury criterion, through new interiors design layouts.
Keywords: Railway vehicles, Passengers comfort, Posture, Ride evaluation, Passive safety
Automated Weed Detection Systems: A Review
Authors: Shanmugam Saraswathi , Assunção Eduardo , Mesquita Ricardo , Veiros André , D. Gaspar Pedro
Published: June 2020

A weed plant can be described as a plant that is unwanted at a specific location at a given time. Farmers have fought against the weed populations for as long as land has been used for food production. In conventional agriculture this weed control contributes a considerable amount to the overall cost of the produce. Automatic weed detection is one of the viable solutions for efficient reduction or exclusion of chemicals in crop production. Research studies have been focusing and combining modern approaches and proposed techniques which automatically analyze and evaluate segmented weed images. This study discusses and compares the weed control methods and gives special attention in describing the current research in automating the weed detection and control.
Keywords: Detection, Weed, Agriculture 4.0, Computational vision, Robotics
Model to Estimate the Project Outcome's Likelihood Based on Social Networks Analysis
Authors: Abreu António
Published: June 2020

One of the Key Challenges in the area of Project Management, is definitely, how to set up the best Project Team, regarding several key areas, such as; team experience, flexibility, engagement, know-how, and intra and cross-collaboration, so that Project Success Outcome can be achieved. Such best Project Team is definitely very difficult, if not extremely hard to define, especially when it comes to intra and cross-collaboration matters, where in projects environment, implies an extreme dynamic interaction between project people, throughout all the phases of a project lifecycle. Forecasting, to the possible extent, how that people dynamic’s interaction is a critical factor that can contribute to dictate how a project outcome will look like, is becoming a major concern for Risk Management, in Project Management. In this line of thought, the present work aims to further contribute to this particular area of Risk Management,  in Project Management, by exploring a new analysis approach, where it points out  its focus towards project People, and how the dynamic interaction of project people, that delivers a project, across its lifecycle, influences or not, a certain project outcome type (failure or success). To provide answer to this question, a heuristic model based on three scientific field pillars (Project Management, Risk Management, and Social Network Analysis Theory), is proposed in this work, which aims to identify a set of critical factors, regarding hoe people dynamically interact across the different phases of a project lifecycle, that are to be associated with project success, and project failure outcome.
Keywords: Project management, Risk management, Social networks analysis
Prediction of Pollutants Emissions in a CFM56-3 Combustor, Using Large Eddy Simulation
Authors: Ascensão Costa Morão Inês Isabel , Ribeiro Proença Brojo Francisco Miguel
Published: June 2020

In the present work a CFD simulation was performed using a CFM56-3 combustor.   It was intended to simulate the combustion and emission of pollutants (CO2, CO, UHC and NOx) from the different jet fuels ( Jet A, Jet B and TS-1), when burning these through ICAO’s LTO cycle. Being this a continuity study, the CAD model of CFM56-3 made by Oliveira [5] was used. The mesh was constructed with HELYX-OS software and the numerical study was made using the commercial software ANSYS Fluent16.2. It can be concluded, amongst all the fuels simulated that increasing the power produces higher NOx. There was also an erratic behaviour in the emissions of UHC and CO results, because an empiric model was used and not a detailed chemical model.
Keywords: Jet Fuels, ANSYS Fluent, Pollutants emissions, ICAO’s LTO cycle, CFM56-3
Theoretical Analysis of Ammonium-perchlorate Based Composite Propellants with RDX Containing Small Size Particles of Beryllium
Authors: de Vasconcelos Figueiredo Paulo Alexandre Rodrigues , Ribeiro Proença Brojo Francisco Miguel
Published: June 2020

Rocket engines have been developed for at least the last six decades. There is a need to improve the actual solid propellant grain for rocket engines through the addiction of metallic fuels in the mixture as well as the addiction of energetic binders to stabilize the combustion. The rocket industry expects the launchers to be reliable, to be faster, stable and to have longer times of operation for the most possible payload weight (operational envelope). New propellants should have optimized ignition and combustion time rates reducing the possibility of negative oxygen balance thus reducing detonation process. Deflagration process should be optimized for best performance of the rocket. In this evolution, small quantities of explosives have been used in the propellant in order to increase the operational burning time, hence, the specific impulse. Adding metallic fuels such as aluminum, boron or beryllium on double based composite propellants and ammonium perchlorate are expected to increase the propellant density over chemical stability and aging resistance. The study of heterogeneous propellants containing large amounts of fine beryllium and ammonium perchlorate,   it is necessary to understand the combustion products so to a proper evaluation of specific impulse, Mach number and mass flow of the mixture. In this study a mixture with nitramides (RDX – Cyclotrimethylene trinitramide) and ammonium perchlorate was analyzed with and without the addiction of small size particles of beryllium using a numerical algorithm. Therefore, this study relates the influence of beryllium  in the performance parameters of ammonium perchlorate based composite propellants.
Keywords: Propellant, Rocket engine, RDX, Ammonium perclorate
Induction Motor Thermal Analysis Based on Lumped Parameter Thermal Network
Authors: Cabral Pedro , Adouni Amel
Published: June 2020

Many industry applications required the use of the induction motors. In such envirenement the electrical machines are facing of many stressed operating conditions. One of the critical creteria which decide the choice of the induction motor is the thermal behaviour under different mode operation. In this paper a study of the thermal behavior of an induction motor is presented. In order to predict the temperature in the different machine components, a model based on the lumped parameter thermal network   has been developed. The geometry of the machine and the thermal properties of its various components are used to express the developed model. The joule and the iron losses are considering as the inputs. The proposed model is implemented and tested using MATLAB software. It is a simple model which could predict rapidly the different temperatures.
Keywords: Induction motor, Thermal analysis, Lumped parameters thermal network, Modeling, Heat sources
A Study of the Magnetic Field inside the Discharge Chamber of an Ion Thruster
Authors: Abranches Diogo , Brojo Francisco
Published: June 2020

One of the characteristics that ion thrusters are known for is its high efficiency.  In the process of designing an ion thruster the study of the magnetic field alongside the discharge chamber is crucial to achieve optimal efficiency. This work shows the importance of taking into consideration the materials in the vicinities of the magnets as well as the expected intensity of the magnetitic field inside the thrusters in study. The procedures used to study the magnetic field in the open software used are described in this work. The thruster in study is an oversizing done of a previous one, so the desired results are to obtain the ones obtained for the original engine.
Keywords: Ion thruster, High efficiency, Magnetic field
Experimental Study of Dielectric Barrier Discharge Plasma Actuators for Active Flow Control
Authors: Barbosa Moreira Miguel André , Freire Rodrigues Frederico Miguel , Páscoa Marques José Carlos
Published: June 2020

The objective of this study is to compare the effect of varying the material used as dielectric layer on the properties of the plasma actuators themselves. The experiments have shown that actuators with a PIB dielectric have a lower power consumption, can achieve higher velocities and have a better mechanical efficiency, but are more prone to failure due to breakdown of the dielectric. We verified that PIB rubber is a suitable material for DBD plasma actuators fabrication presenting several interesting features.
Keywords: Active flow control, Plasma actuators, Dielectric barrier discharge, Dielectric materials