bluuebunny/crossref_metadata_2025 huggingface dataset:
TL 18182 - Distal phalanx osteotomy in hallux deformity
Authors: Yanez Arauz Juan Manuel , Montiel Verónica , Machado Verónica , Alfonso Matías , Villas Carlos , Arauz Junior Juan Martín Yañez
Published: November 2019

Introduction: There are many techniques to correct the hallux deformity. Most of them include metatarsal and/or phalanx osteotomies. Akin osteotomy of the proximal phalanx is used to correct the distal articular set angle or the interphalangeal angle. However, indications for distal phalanx osteotomy remain unpublished. The aim of this study is to prove the benefit of performing an osteotomy on the distal phalanx in some cases to correct hallux deformities. Methods. We report 9 cases in which osteotomy of the distal phalanx was performed to correct the hallux deformity. Radiographic measurements were performed on standing dorsoplantar radiographs to analyze the distal articular set angle, interphalangeal obliquity, interphalangeal angle, and metatarsophalangeal angles. The cases are described. The surgical technique was performed by minimal incision surgery using fluoroscopy. The clinical results were evaluated by the VAS and the AOFAS forefoot scale. The mean follow-up was 92 months. Result: The clinical results for all the patients were excellent, pain was relieved and deformities were corrected. The DASA, interphalgeal obliquity, interphalangeal angle and F2-metatarsophalangeal angle where rectified. The patients where highly satisfied with both the aesthetic and functional results. Only three cases have been performed within the last two years, and long-term results remain to be evaluated. However, over a 10-year follow-up, the correction made in the remaining five cases has persisted. Conclusion: Correction of a Hallux Valgus deformity can be achieved with an osteotomy of the proximal phalanx. In cases with valgus deviation in the distal phalanx, a corrective osteotomy of F2 alone or associated with osteotomy of the proximal phalanx should be considered.
TL 18245 - Analysis of the efficacy of clinical data collection in orthopedic patients using online questionnaires
Authors: Kerber Cavalcanti Lemos André Vitor , Cohen Moises , Barbachan Mansur Nacime Salomão
Published: November 2019

Introduction: Clinical data collection is an essential stage in the development of any scientific research study. The recruitment of patients to research centers for data collection may be considerably difficult in some situations. There are few studies examining the use of distance evaluations conducted with digital and online tools. The use of information technology and the Internet to collect clinical data for scientific studies in orthopedics in Brazil remains somewhat limited; nonetheless, such approaches may provide several benefits to and facilitate data collection for Brazilian researchers. Methods: We performed a descriptive, observational study with printed or online (using an electronic device, such as computer, tablet or cell phone) self-administered questionnaires. Data from 40 patients (22 women; 18 men) with a mean age of 36.9 years (min: 15 years; max: 65 years) who were undergoing orthopedic follow-up for acute ankle sprain were collected using the Foot Function Index (FFI), Physical Function, Cumberland Ankle Instability Tool (CAIT), and visual analog scale (VAS) questionnaires. The questionnaires were administered at 4 different times: at the initial evaluation and at 3 weeks, 6 weeks and 12 weeks. Results: A comparative group analysis (digital, online data collection vs physical data collection) showed a higher level of collection of all data for each patient when the online questionnaires were used (87.5% vs 45% p<0.005), along with a higher accuracy of data collection (standard deviation (SD): 1.26; 2.3318; 1.6393 vs SD: 2.948; 3.807; 8.1189 p<0.005). Conclusion: Data collection using a remote approach through digital online forms (Internet) was highly effective in increasing the rate of response to long-term orthopedic follow-up questionnaires and showed improved data quality (decreased variability in collection dates), thus rendering online data more reliable for intergroup comparison.
Introduction
Authors: Stéfani Kelly Cristina , Adames Mario
Published: November 2019

Dear Colleagues, 

The Brazilian Association of Medicine and Surgery of the Ankle and Foot (ABTPé) are pleased to present abstract highlights from the ABTPé Biennial Meeting 2019, May 15-18 in Florianopolis, Santa Catarina. The meeting brought together orthopedic foot and ankle surgeons for the purpose of advancing education and research in the Brazil.

Although some of the research studies presented at our live conference have been published in the academic literature, many others are not be published. To help bridge the gap between live presentation and publication, the ABTPé selected abstracts (podium presentation, poster, and e-Poster) to publishing in the Scientific Journal of the Foot & Ankle.  The Journal offers free and open access to your content on our website. All abstracts are already published with active DOIs.

We hope that you enjoy these ABTPé Biennial Meeting 2019 highlights and will find the information useful to your practice.

We look forward to meeting you at the ABTPé Biennial Meeting 2021 in Campos do Jordão, São Paulo.

 

Kelly Cristina Stéfani, MD, PHDAssociated Editor Scientific Journal of the Foot & Ankle

Mario Adames, MDABTPé Biennial Meeting 2019 President
PO 18019 - Osteonecrosis of the intermediate cuneiform bone
Authors: Nunes Gustavo Araújo , Oliveira Junior Otaviano De , Maciel Bruno Braga , Marcatti Mateus Martins , Bertolini Fabricio Melo
Published: November 2019

Introduction: Osteonecrosis is a disease that rarely affects foot bones. When present, it is more commonly found in the talus and navicular bones. Cases of osteonecrosis of the intermediate cuneiform bone are extremely rare, and after a literature review, we found 5 reported cases, all in pediatric patients. Objective: The objective of this study is to report a case of an adult patient with osteonecrosis of the intermediate cuneiform bone that was resistant to conservative treatment, for which we proposed a surgical approach. Results: The patient underwent surgical treatment and showed excellent clinical and radiographic progression, with significant improvements in the American Orthopedic Foot and Ankle Society (AOFAS) score and in the pain visual analog scale. He rated the outcome as excellent and reported that he would undergo the procedure again. Conclusion: The authors present a rare case of an adult patient with osteonecrosis of the intermediate cuneiform bone that was surgically treated with decompression and bone grafting and had a good outcome.
PO 18042 - Surgical treatment of moderate and severe hallux valgus
Authors: Ferreira da Silva Rafael , Baptista André Donato , Alencar Mendes de Carvalho Kepler
Published: November 2019

Introduction: Hallux valgus is a multifactorial disease, and heredity is the main associated factor. Pain and discomfort when using closed-toed shoes occur in many cases, adversely affecting quality of life. Surgical treatment is indicated when pain and disability persist after conservative treatment. Currently, more than 150 surgical techniques are described for hallux valgus correction, with no consensus regarding the best treatment. With the advent of minimally invasive techniques for hallux valgus correction, Vernois developed the percutaneous chevron osteotomy. This technique allows up to 100% lateral translation of the contact area of the osteotomy. Objective: the objective of the present study was to assess the correction of radiographic parameters, clinical improvement and potential complications of the first 30 cases of moderate and severe hallux valgus operated on at our hospital using the percutaneous chevron technique. Methods: A total of 26 patients (30 feet) underwent surgery. The following parameters were measured in the pre- and postoperative periods: the first metatarsophalangeal (MTP) angle, the intermetatarsal angle between the 1st and 2nd metatarsals (IMA), the distal metatarsal articular angle (DMAA) and the pre- and postoperative American Orthopedic Foot and Ankle Society (AOFAS) scores, with a minimum follow-up period of 6 months. Results: The mean age of the patients was 52.3 years. During the preoperative period, the mean AOFAS score was 45.6; it increased to 90.3 after the procedure, indicating a statistically significant improvement. The mean MTP angle, IMA and DMAA were 29.7°, 14.2° and 14.2° before surgery and 12.8°, 8.2° and 11.1° after surgery, respectively. The improvements in the MTP angle and the IMA were also significant. There was no decrease in angles or worsening of AOFAS scores during follow-up. Conclusion: The percutaneous chevron technique was safe and effective for correcting cases of moderate and severe hallux valgus, with significant improvements in clinical and radiological parameters and a low rate of postoperative complications.
PO 18067 - Application of 5% lidocaine patch to painful surgical scars
Authors: Da Rocha Macedo Rafael , Gonçalves dos Santos João Paulo , Mendes Júnior João , Smith Lobato Emanuel , Putini Dario , Miller Reis Rodrigues Luciano , Yukio Ikemoto Roberto
Published: November 2019

Introduction: Chronic postoperative pain, defined as persistent pain at the surgical incision site 3 months after a procedure, is a common complaint in orthopedic practice. Almost 50% of patients who undergo orthopedic surgery are presumably affected by this complaint. The objective of this study is to evaluate the lidocaine patch 5% as a method for neuropathic pain treatment after orthopedic surgery compared with therapeutic massage performed over the incisions. Methods: This is a prospective, randomized clinical trial of 37 patients who underwent orthopedic surgery from January 2015 to February 2017. All individuals were assessed using the pain visual analog scale (VAS) and the 36-Item Short Form Survey (SF-36) quality of life questionnaire at treatment onset and at 30, 60 and 90 days of treatment. Results: Both groups showed improvement in pain, although the group using the patch showed a greater reduction of pain over time. There were no significant differences in the parameters assessed by the SF-36: physical functioning, physical role functioning, vitality, emotional role functioning, social role functioning, general health perceptions or mental health. The main advantage of the patch lay in the degree of patient satisfaction, which was significantly higher than that of massage, most likely because the patch is easily applied and generates a psychological effect as a drug therapy. Conclusion: The lidocaine patch and massage are effective treatment methods for reducing scar pain that show similar results. The patch is associated with an improvement in the degree of patient satisfaction.
PO 18068 - Treatment of chronic extensor hallucis longus tendon injury using plantaris tendon graft
Authors: Da Rocha Macedo Rafael , Miller Reis Rodrigues Luciano , Fonte Bruno , Asaumi Inácio Diogo , Quercia Rodrigo Fernando
Published: November 2019

Introduction: Foot extensor tendon injuries account for 1% of all tendon injuries. Extensor hallucis longus (EHL) tendon lacerations are even less common, and studies on the subject are limited to a small number of case reports and series. Objective: The objective of this report is to show the possibility of using the plantaris muscle as a graft option for the reconstruction of the extensor hallucis longus tendon in cases of damage due to chronic injury. Methods: The subject was a 30-year-old male factory worker who had had a laceration in the dorsal region of the right foot for approximately 2 months. He showed a deficit in hallux extension. Given the indication for surgical treatment and due to the distances between the stumps, we chose to use the plantaris muscle as a graft. Results: The patient was evaluated 6 months after surgery, and we observed a satisfactory outcome with improvements in hallux extension and functional gait. Conclusion: We chose the plantaris tendon as a graft because we believe it is easily harvested, has low morbidity at the donor site, has no or minimal loss of function and meets the needs for the desired reconstruction. Because this is a large graft, we solved the problem of the smaller diameter by performing double-band reconstruction. We concluded that the plantaris is a viable option for neglected EHL injuries or rerupture that offers low morbidity with no significant loss of function in the donor region.
PO 18069 - Management of soft-tissue injuries in lower extremity fractures
Authors: Da Rocha Macedo Rafael , Gonçalves dos Santos João Paulo , Putini Dario , Miller Reis Rodrigues Luciano
Published: November 2019

Introduction: Patients with lower extremity fractures have a high incidence of peri- and postoperative complications, such as extensive swelling, blisters, surgical wound infection, slow wound healing, persistent wound drainage and suture dehiscence. In calcaneal and tibial plafond fractures and ankle fractures/dislocations, especially in patients older than 50 years and those with diabetes, these complications are associated with a longer hospital stay and increased treatment costs and morbidity and mortality rates. The objective of this study is to perform a literature review of the management of blisters in lower extremity fractures and, based on the findings, to develop a management protocol for these lesions.  Methods: Literature review of the state of the art in international databases. Articles published in indexed journals from 1995 to 2014 addressing soft-tissue management in ankle, calcaneal and tibial plafond fractures were selected. Results: Various treatment methods have been described in the literature: observation without intervention, application of sterile dressing, content aspiration, removal of the blister roof and application of an antibiotic ointment or topical treatment alone; all have similar outcomes regarding the delay in definitive surgery and the incidence of mild and severe soft-tissue complications. No large studies comparing these treatment alternatives are available. Conclusion: There is no consensus in the literature on the proper management of blisters. Further studies should be performed to define a protocol for the management of these lesions.
PO 18074 - Rotational biplanar Chevron osteotomy
Authors: Baumfeld Tiago Soares , Pires Prado Marcelo , Mendes Alberto , De Souza Nery Caio Augusto , Baumfeld Daniel Soares
Published: November 2019

Introduction: The Chevron osteotomy is a reliable and popular osteotomy for treating hallux valgus worldwide. Many modifications have been described, but none of them address the rotational deformity of the first metatarsal. The objective of this study is to describe a variation of biplanar Chevron osteotomy that can address first metatarsal rotation when necessary. Methods: The indications for the Rotational Biplanar Chevron Osteotomy (RBCO) are mild to moderate hallux valgus deformity associated with hallux pronation related to internal rotation of the first metatarsal bone. We describe a technique that uses a medial-based wedge parallel to the plantar limb of the osteotomy to free the distal fragment for correct rotation. Results: The more recent concern about hallux valgus surgery represents a very interesting concept that this deformity truly occurs in three different planes, and we may have mistreated the rotation component using current techniques. Many authors have revisited numerous common techniques to adapt them to correct metatarsal pronation. To the best of our knowledge, this is the first paper to describe a modification of the Chevron osteotomy to address rotation of the first metatarsal.  Conclusion: We can conclude that rotational biplanar Chevron osteotomy is an useful tool in the treatment of mild hallux valgus associated with metatarsal pronation.
PO 18076 - Shockwave therapy associated with eccentric strengthening for Achilles insertional tendinopathy
Authors: Soares Baumfeld Tiago , Barbachan Mansur Nacime Salomão , Villalon Fernando , Dos Santos Paulo , Shiefer Bruno , Tamaoki Marcel
Published: November 2019

Introduction: Conservative treatment for insertional Achilles tendinopathy (IAT) has failed to produce encouraging results in recent years. Shockwave therapy (SWT) has become a reliable option for the management of this disease in recent years. The objective of this study is to report the effectiveness of low-energy SWT combined with an eccentric strengthening protocol in 19 consecutive patients. Methods: This is a prospective study of 19 patients diagnosed with IAT. The protocol consisted of SWT combined with eccentric training for 12 weeks. All patients were evaluated on the first day and after 24 weeks using the Victorian Institute of Sport Assessment-Achilles (VISA-A) score, the Pain Visual Analog Scale (VAS) and the American Orthopedic Foot and Ankle Society (AOFAS) questionnaire and algometry. The patients were also evaluated for compliance with the protocol, complications and final outcome. Results: All patients completed the study without complications. In total, 15 (79%) patients fully complied with the Alfredson protocol, and 13 (68%) considered the treatment successful. At the final evaluation, the patients required more pressure on the calcaneus to trigger pain (Algometry 1), reported less pain when applying the algometer with 3 kg of pressure (Algometry 2) and had less global pain (VAS) and higher AOFAS and VISA-A scores. All differences were significant. Conclusion: Eccentric training combined with SWT is an effective treatment for IAT. Further placebo-controlled studies with a longer follow-up are necessary to support this statement.
PO 18112 - Computed tomography modifies the diagnosis of ankle fractures
Authors: Cavaleiro Cruel Neves Caroline Marques Dos Santos , Barbachan Mansur Nacime Salomão , Pereira Vinicius Felipe , Santana Celestino Fausto , Costa Astur Diego , De Souza Nery Caio Augusto
Published: November 2019

Introduction: Ankle fracture is an injury with a high rate of surgical indication in clinical practice. Treatment decisions are classically based on radiographs (XR) of the region; however, this approach may be imprudent considering the frequent difficulty of reading them. In recent years, some researchers have advocated the use of computed tomography (CT) as an auxiliary instrument in the diagnosis and surgical planning of treatment for this injury. Our study aims to demonstrate the superiority of the combination of CT with XR for evaluating ankle fractures. Methods: Examinations (XR and CT) of 53 patients with ankle fractures seen from 2011 to 2016 were collected. Seven raters (2 foot and ankle experts, 1 foot and ankle surgeon with less than 5 years of experience in the medical specialty, 2 foot and ankle surgeons with more than 5 years of experience in the medical specialty and 2 general orthopedists with more than 5 years of board certification) evaluated the unlabeled examinations in random order and identified the injuries found on XR alone and those also detected on CT. The data were subjected to statistical analysis. Results: The characteristics of medial malleolar fracture (posteromedial and anterior colliculus fragment), the presence of posterior malleolar fracture and its characteristics (avulsion, deviation, fragment larger than 25%, posteromedial and posterolateral fragment) and syndesmosis injury and the absence of deltoid bone injury were clearer in CT combined with XR than in exclusively radiographic examinations in all groups, with high intraobserver reliability. Conclusion: Our study shows that conventional XR at 3 positions may fail to reveal more subtle injuries. CT emerges in this scenario as an extremely widespread and well-supported examination in the approach to articular fractures, although it is not yet fully incorporated into clinical practice for ankle fractures. Our conclusion is that this examination increases diagnostic accuracy and may improve the quality of information available to the clinician and surgeon, who thus gain access to more data, which may positively influence patient care.
Spontaneous Pituitary Adenomas in Squirrel Monkeys (Saimiri sciureus)
Authors: Daggett Gregory J , Wood Jennifer S , Gumber Sanjeev , Pinelli Christopher J
Published: November 2019

On postmortem examination, 2 geriatric captive male squirrel monkeys (Saimiri sciureus) were found to have pituitary masses that were unassociated with previous experimental manipulation. Both animals were euthanized due to apparently unrelated clinical reasons. Histopathology
and immunohistochemical staining classified these tumors as thyrotrophic and corticotrophic pituitary adenomas. These cases represent the first reports of this tumor type in squirrel monkeys.
Gross chemical composition of dark gray podzolized soils of Small Polissya and its transformation caused by human impact
Authors: Haskevych Volodymyr
Published: November 2019

Dark gray podzolized soils (Phaeozems Albic (PHad), WRB, 1998) are typical for the natural area of Pasmove Pobuzhia physiographic oblast of the Small Polissya. The investigation of the transformation of the gross chemical composition of dark gray podzolized soils of Small Polissya due to erosion processes conducted for the first time, confirming the relevance of the research.
Standard methods of research were used in the investigation of the gross chemical composition of dark gray podzolized soils. The research results have been worked out according to the methodology of Y. Arynushkina and N. Myakina.
According to the research, SiO2 dominated in all genetic soil horizons. Its content in the humus-accumulative horizon is 82.06 % by weight of calcined soil, decreasing to 74.45 % in soil rock. Different distribution of silica in the soil profile indicates the poor process of podzolic soil development. Among oxides in the soil profile dominates Al2O3, it contents in the humus-accumulative horizon is 8,10 %. A slight accumulation of Aluminium oxides was found in horizon confirming weak profile differentiation by eluvial-alluvial type. Content of Fe2O3 oxides in the soil profile is low variadic in the arable layer and the content is 2.30 %. Oxides of CaO content ranges from 0,75 % in the horizon He to 6,17 % in soil rock, and the content of oxides MgO, respectively, from 0.65 % to 1.06 %. Gross content of iron oxides, titanium, manganese, sodium, potassium, phosphorus and sulfur in the soil genetic horizons ranges from 0,04 % to 2,39 %.
The estimated ratio between the major oxides and their profile distribution also confirm weak profile differentiation of dark gray podzolized soils.
The content of the constitutional water of humus He horizon of dark gray podzolized soils is 1.57 %. Increase of constitutional water in the middle of the profile may be caused by increasing of internally soil deflation processes. This is also confirmed by the growth of silica coefficient changes of the soil at the same depth.
In eroded dark gray podzolized soils of the arable layer the content of SiO2 is decreasing, reaching values of 79,63–80,84 % in strongly eroded. The content of other oxides tends to increase as well as decrease comparing to non-eroded soil. The correlation between wash out level and molar magnitude ratios
The correlation between wash out level and molar magnitude ratios is being observed in eroded soils. With erodation increase the ratio of SiO2: Al2O3 and SiO2: R2O3 is being narrowed, which indicates accumulation in arable horizons of aluminium, including oxides in general, compared with non-eroded types.
The content of the constitutional water increases and expands the coefficient of the silica changes, indicating the strengthening of internally soil deflation processes in the arable layer of erosion-degraded dark gray podzolized soils compared to non-eroded types.
Key words: dark gray podzolized soils, gross chemical composition, oxides, degradation.
Demographic potential of urban village network of Lviv region
Authors: Dnistryanska Natalia , Zhulkanych Borys
Published: November 2019

Demographic importance of urban village as special category of settlements is grounded. Basic demographic indicators of urban village network in Lviv region are disclosed in the context of the four settlement bands – North-Malopoliska, Central, Foothills and Mountainous. It is suggested to consider an indicator of the demographic weight of settlement networks as the ratio of the density of population living in the urban village to the density of urban population in general. It is estimated that the highest value of the demographic weight is in North-Malopoliska and Mountainous settlement bands. There is a high density of urban village in Central and Foothills settlement bands of Lviv region. In spite of that, level of demographic weight of the settlement network is low. It is manifested in a small proportion of urban village population in the urban population. Analysis of demographic parameters of urban village network in Lviv region confirmed its great potential in the further urbanization of the region, but in case of its successful economic development.
Key words: urban village, demographic value of urban village network, population settlement bands in Lviv region, urban village density, number of population in urban villages.
Trends and problems of Geography development in Ukraine in the context of higher education reform
Authors: Lozynskyy Roman , Bilanyuk Volodymyr
Published: November 2019

Changes in training geographers in Ukraine in the context of the reform of higher education are analysed. In particular, on the basis of materials of admission to universities in 2016 geographical specialization in the first year (The Bachelor of Education), modern tendencies and problems of geographic education in higher educational institutions of Ukraine are identified. Possibilities to university entrance on the geographical specialties in 2017, taking into account recent changes in education, are characterized. Educational reform in Ukraine has strong effect on the training of the professional staff in geography in higher educational institutions. A new list of specialties, approved by the Ministry of Education and Science in 2015, does not include geography. Therefore, the number of students that started studying at the geographical specializations had significantly decreased in 2016. The average grade point of admitted students also had decreased. The number of students is highly dependent on the number of State-financed places allocated to the Ministry of Education and Science. Altogether about 900 students entered the geographical specialties in 2016. Taras Shevchenko National University of Kyiv and Ivan Franko National University of Lviv are the largest training centers of the students admitted to geographical specialty. In the coming years, the further reduce of the prestige of geographical education is possible. To overcome the negative trends it is necessary to update the geography education according to the world requirements. Key words: geography, Earth Sciences, secondary education, specialty, specialization, higher education institution.
Analysis of the relationships between morphometric relief parameters and visual characteristics of Ukrainian Carpathians ecosystems
Authors: Mkrtchian Alexander
Published: November 2019

The paper deals with the analysis of the relationships between the visual characteristics of mountain ecosystems as they appear on spatial images, and the characteristics of the abiotic conditions as being governed and (or) indicated by the terrain morphometric parameters, in the study area in Ukrainian Carpathians. LANDSAT 7 ETM+ spatial imagery with 30 m resolution, and SRTM v. 4.1 DEM with 90 m ground resolution were the main data sources used in the study. Based on the analysis of LANDSAT imagery, three principal components have been picked out that describe the different characteristics of vegetation and land cover spatial differentiation. Terrain parameters accounted for in the study included raw elevation values, flow energy index, slope values, topographic wetness index, and insolation index. The canonical correlation analysis has then been applied to analyze the relationships between the landscape reflectance characteristics, and the terrain morphometric parameters, allowing deriving two statistical significant canonical roots and determining their structure. The relationships between the structure and properties of vegetation cover (as conditioned by landscape abiotic factors and the land use structure), and the terrain morphometric parameters have thus been revealed and statistically substantiated. Key words: LANDSAT imagery, digital elevation models, terrain morphometric parameters, factor analysis, canonical analysis.
Present condition and prospects for Polish coal mining
Authors: Przybyłka Arek , Manko Аndriy
Published: November 2019

Coal is the basis of energy production in Poland. Its production, however, has been steadily decreasing. Falling prices on world markets, which make their extraction in Poland, continues to pay off. You can not forget, however, that the country's energy security is based on this raw material all the time. Actions should be taken to limit the cost of extraction. It is necessary to start to use advanced technologies in coal combustion process and be aware of its other applications. With this in mind it is necessary not only to lead efforts to liquidate mines, but also to take corrective actions. Nowadays, coal mining is experiencing a setback. However, the resources that are in Poland do not allow you to abandon this energy source. In the coming years we can expect an increase in demand for coal. Polish power industry in the coming decades will be based, as at present, on carbon. In line with the Polish Energy Policy until 2050 Poland should strive for energy independence and therefore the indigenous resources of coal and lignite will stabilize country's energy security. Consumption of coal will remain at current levels, due to improvements in the efficiency of new generation units. Therefore, the aim of the suggested actions should be providing both the security of energy and the rational use of available resources of coal. Key words: coal, energy, Polish mining.
Mathematical Modeling of the Contact Interaction of Plate and Beam in Color Noise Field
Authors: Яковлева Татьяна , Yakovleva Tat'yana , Баженов Валентин , Bazhenov Valentin , Крысько Вадим , Krys'ko Vadim
Published: November 2019

A mathematical model and data visualization of contact interaction between a plate and a beam under the action of external transverse load and external additive color noise is constructed. The construction is in a stationary temperature field, the effect of which is taken into account according to the theory of Duhamel Neumann by solving the three-dimensional and two-dimensional heat conduction equations by the finite difference method, the heat exchange between the plate and the beam is not taken into account. The plate is subject to the Kirchhoff model, and the beam to the Euler- Bernoulli model. The mathematical model takes into account the physical nonlinearity of the elastically deformable material. Contact interaction is taken into account according to the theory of Kantor. The system of differential equations is reduced to the Cauchy problem by the Bubnov-Galerkin method in higher approximations in spatial variables. The Cauchy problem is solved by the Runge-Kutta method of the fourth order of accuracy. To solve the physically nonlinear problem, at each time step, an Birger iterative procedure was applied. The visualization of the results of a numerical experiment was carried out using the methods of nonlinear dynamics and using wavelet analysis. The numerical results of the effect of color noise on the contact interaction between the plate and the beam are given. It has been established that red additive noise has a more significant effect on the oscillation pattern of the lamellar-beam structure in comparison with pink and white noise.
Comparative Analysis of Methods for Segmentation of FMRI Images Based on Markov Random Fields
Authors: Черняев Сергей , Chernyaev Sergey , Лукашенко Олег , Lukashenko Oleg
Published: November 2019

The problem of segmentation of three-dimensional fMRI images based on the Bayesian approach is considered, where Markov Random Field is used as the prior distribution, and von Mises-Fisher distribution is used as the observation model. The main problem when applying this approach in practice is an estimation of the model parameters. In this paper, we review algorithms HMRF-MCEM, HMRF-EM and GrabCut, which implement this statistical model and estimate parameters without the usage of the labeled training data. The methods HMRF-EM and GrabCut were introduced in conjunction with other statistical models, but after a small modification, they can be used with the von Mises-Fisher distribution. A comparative study was carried out by performing experiments on both synthetic, generated from the statistical model, and real fMRI data.
The Possibilities of GIS-technologies in Systematization of Information on Cultural Heritage (on the Example of Bryansk Region)
Authors: Лобанов Григорий , Lobanov Grigoriy , Прокопишин Руслан , Prokopishin Ruslan , Абадонова Дарья , Abadonova Dar'ya , Крохина Валерия , Krohina Valeriya
Published: November 2019

The article analyzes the experience of creating a database of spatial data (BPD) on the cultural heritage of the Bryansk region as a basis for decision-making support in the organization of the tourism and recreational industry in the region. Methodical and technological decisions for physical, conceptual and logical level of design are given, their scientific and methodical and normative legal bases are discussed. The structure and content of BPD – electronic maps, layers, spatial and attribute characteristics of objects are described. The generalized information about the method of filling thematic layers, problems of data collection, systematization, visualization is given. The role of different types of software in the collection, systematization and visualization of data on cultural heritage is discussed. The tasks that are solved or proposed to be solved on the basis of the BPD are considered: collection of information about the area surrounding the heritage site, sorting and grouping of data, scientific reference mapping. Directions of use of BPD in the solution of branch tasks and prospects of development as an information resource are shown.
Thermal-to-color image translation for visualization on the pilot's display
Authors: Князь Владимир , Knyaz' Vladimir , Козырев Марк , Kozyrev Mark , Бордодымов Артём , Bordodymov Artem
Published: November 2019

Long range infrared cameras may provide increasing crew situational awareness in limited vision and night conditions. Similar cameras are installed in modern civil aircrafts as part of an improved vision system. Correct thermal image interpritation by the crew requires certain expiriance, due to the fact that view of the scene very different from the visible range and may change within time of day and season. This paper discusses the deep generative-adversary neural network to automatically convert thermal images to semantically similar color images of the visible range.
Assessing the Quality of Visualization Metaphor of Fuzzy Cognitive Maps on the Basis of Formalized Cognitive Clarity Criteria
Authors: Подвесовский Александр , Podvesovskiy Aleksandr , Исаев Руслан , Isaev Ruslan
Published: November 2019

The paper presents continuation of research in the field of constructing a visualization metaphor of cognitive models based on fuzzy cognitive maps. The focus is on the spatial metaphor as the basis for representation metaphor formation. A method is proposed for quality assessment of a spatial metaphor of a fuzzy cognitive map based on formalized cognitive clarity criteria defined in the previous part of the study. To this end, methods have been developed to formalize several nontrivial criteria of cognitive clarity. An example is given that confirms correctness of the proposed method for assessing the quality of a visualization metaphor.
Predicting Video Saliency Using Crowdsourced Mouse-Tracking Data
Authors: Людвиченко Виталий , Lyudvichenko Vitaliy , Ватолин Дмитрий , Vatolin Dmitriy
Published: November 2019

This paper presents a new way of getting high-quality saliency maps for video, using a cheaper alternative to eye-tracking data. We designed a mouse-contingent video viewing system which simulates the viewers’ peripheral vision based on the position of the mouse cursor. The system enables the use of mouse-tracking data recorded from an ordinary computer mouse as an alternative to real gaze fixations recorded by a more expensive eye-tracker. We developed a crowdsourcing system that enables the collection of such mouse-tracking data at large scale. Using the collected mouse-tracking data we showed that it can serve as an approximation of eye-tracking data. Moreover, trying to increase the efficiency of collected mouse-tracking data we proposed a novel deep neural network algorithm that improves the quality of mouse-tracking saliency maps.
RANSAC ART Tomography
Authors: Афанасьев Владимир , Afanasyev Vladimir , Волобой Алексей , Voloboy Alexey
Published: November 2019

This paper describes using of per-voxel RANSAC approach in ART tomography. The method works as an addition to any ART and does not depend on its internal details. Firstly, the histograms of voxel map corrections are constructed in each voxel during usual pass of ART. Then, they are used to refine the absorption map. It allows to improve resulting voxel absorption map, reducing ghost effects caused by input data errors and inconsistency. This method was demonstrated with optical tomography algorithm as it has certain difficulties with input data. The proposed algorithm was implemented to run on GPU.
The Model of Reflective Surface based on The Scattering Layer with Diffuse Substrate and Randomly Rough Fresnel Boundary
Authors: Будак Владимир , Budak Vladimir , Гримайло Антон , Grimailo Anton
Published: November 2019

In this article, we describe the mathematical model of the reflective surface as a scattering layer with the diffuse substrate and randomly rough Fresnel boundary. This model opens the way for a physically correct description of the light reflection processes with polarization account and hence enables engineers and designers to obtain much more precise results in their work. The algorithm of Fresnel boundary modeling based on the method of mathematical expectations reduces calculation time by constructing the randomly rough surface only at the ray trajectory nodes instead of constructing realizations of a random field. As a part of the complete reflective surface model, the algorithm made it able for us to model the effect of the average lens emergence.
Determination of the Size-topological Parameters the Structure of Cast Iron
Authors: Макаренко Константин , Makarenko Konstantin , Зенцова Екатерина , Zentsova Ekaterina , Никитин Александр , Nikitin Alexander
Published: November 2019

The methods of geometric identification and determination of the main size-topological parameters of the graphite phase in cast iron are studied. The methods used in world practice to identify the form of graphite inclusions are considered. It is proposed to use the methods of fractal geometry for the determination and identification of graphite inclusions in cast iron. A method for determining the size-topological characteristics of the graphite phase in cast iron has been developed. To describe the non-uniformity of the distribution, the lacunarity function was used. An example of determining the size-topological parameters of the graphite phase for various types of cast iron is presented.
Multi-windows Rendering Using Software OpenGL in Avionics Embedded Systems
Authors: Барладян Борис , Barladyan Boris , Шапиро Лев , Shapiro Lev , Маллачиев Курбан , Mallachiev Kurban , Хорошилов Алексей , Khoroshilov Alexey , Солоделов Юрий , Solodelov Yuriy , Волобой Алексей , Voloboy Alexey , Галактионов Владимир , Galaktionov Vladimir , Ковернинский Игорь , Koverninskiy Igor
Published: November 2019

Elaboration of modern airplane cockpit has tendency to use large displays instead of a lot of separate indicators. The large display should combine information about flight navigation and state of plane equipment. Information coming from a wide variety of devices should be displayed simultaneously. Therefore multi-windows rendering is vitally important here. Its implementation must be embedded in real-time operating system which controls the aircraft. Development of a Safety Critical Compositor for multi-windows rendering for OpenGL SC 1.0.1 software is considered in the paper. It works under the real-time operating system JetOS newly designed for aircraft. Development is based on the use of extensions designed to work in multi-core systems in addition to standard JetOS partitioning services.
Compact GPU-based Visualization Method for High-resolution ResultingData of Unstable Oil Displacement Simulation
Authors: Тимохин Петр , Timokhin Petr , Михайлюк Михаил , Mikhaylyuk Mikhail
Published: November 2019

In the paper the task of real-time synthesis of quality images of resulting data obtained in simulation of unstable oil displacement from porous media is considered. A new, GPU-based method to construct and visualize on UltraHD screens a polygonal model of the isosurface of the saturation of displacing liquid was proposed. The method is based on distributing and parallelizing of «marching cubes» threads between GPU cores by means of programmable tessellation. As initial graphic primitives, quadrangular parametric patches are used, the processing of which on the GPU is high-performance and has low video memory overhead. The proposed method was implemented in visualization software and successfully tested. The proposed solution can be used in researches in oil and gas industry as well as in virtual environment systems, virtual laboratories, scientific and educational applications, etc.
Visualization of Scenarios for the Transition of Oscillations from Harmonic to Chaotic for a Micropolar Kirchhoff-Love Cylindrical Meshed Panel
Authors: Крылова Екатерина , Krylova Ekaterina , Папкова Ирина , Papkova Irina , Салтыкова Ольга , Saltykova Olga , Крысько Вадим , Krysko Vadim
Published: November 2019

On the basis of the kinematic hypotheses of the Kirchhoff-Love built a mathematical model of micropolar cylindrical meshed panels vibrations under the action of a normal distributed load. In order to take into account the size-dependent behavior, the panel material is considered as a Cosser’s pseudocontinuum with constrained particle rotation. The mesh structure is taken into account by the phenomenological continuum model of G. I. Pshenichnov. For a cylindrical panel consisting of two systems of mutually perpendicular edges, a scenario of transition of oscillations from harmonic to chaotic is constructed. It is shown that in the study of the behavior of cylindrical micropolar meshed panels it is necessary to study the nature of the oscillations of longitudinal waves.
¡Ya Basta! Countering the Effects of Neoliberal Reform on an Urban Turnaround High School
Authors: Pazey Barbara L.
Published: November 2019

This article provides an account of the ways in which students and adult supporters of an urban turnaround high school mobilized to defy the rhetoric of neoliberal reforms and the subsequent deficit narrative imposed on them and on their school. Their counternarratives refute the master narratives advanced by federal and state educational reforms. The current rationale of neoliberal reforms and the disabling terminology used to construct the identity of a school and the individuals associated with the school are interrogated through the theoretical framework of Dis/ability Critical Race Theory. An alternative approach and philosophy of thought regarding school reform and the ways in which we define the worth and value of a school, its students, and the larger community is offered.
PYROLYSIS OF VARIOUS TYRE TYPES: CHARACTERISTICS AND KINETIC STUDIES USING THERMOGRAVIMETRIC ANALYSIS
Authors: Iwarere Samuel Ayodele , Mkhize Ntandoyenkosi Malusi
Published: November 2019

The present study entails investigating the fractional devolatilisation effect on the passenger car tyre (PCT) and truck tyre (TT). Thermograms and their first derivatives are used to profile devolatilisation of the passenger and truck tyres rubbery fractions. Both tyre types rubbery fractions consist of mainly natural rubber (or polyisoprene, NR) and synthetic rubber (polybutadiene, BR and styrene-butadiene, SBR). The NR is relatively significant compared to the BR and SBR in the TT. In the PCT, the rubbery fraction showed equal distributions between the NR and BR-SBR. Unlike conventional waste resources pyrolysis processes where the aim is towards energy recovery, novel pyrolysis is designed based on the characteristics of the materials in order to promote the production of the valuable products in addition to the energy recovery. Therefore, kinetic mechanisms pathways of the rubbery fraction devolatilisation from waste tyre pyrolysis are studied and models are developed. Model-free methods, such as Friedman and Kissinger are used to model the kinetics parameters.
Implementación de una micro empresa comunitaria de industrialización y comercialización de lácteos en la comunidad Tuntatacto, cantón Guano, provincia de Chimborazo, y su impacto en el desarrollo socioeconómico, año 2015
Authors: Carrillo Pulgar Wilman
Published: November 2019

La investigación pretende evaluar la viabilidad empresarial para la puesta en marcha de una microempresa comunitaria, que integra la asociación de los pequeños productores de leche de la comunidad Tuntatacto, y el procesamiento de dicha materia prima, con la finalidad de generar valor agregado. Se determinó la oferta, demanda y la demanda insatisfecha, levantando información primaria en el mercado objetivo Riobamba. Se determina los recursos necesarios para la puesta en marcha y operatividad de la empresa, se obtuvo el monto de la inversión requerida, el capital de trabajo para tres meses de operaciones. Finalmente la evaluación financiera para observar su factibilidad.
Palabras clave: Microempresa comunitaria, oferta, demanda, demanda insatisfecha.
URL: http://revistas.uta.edu.ec/erevista/index.php/bcoyu/article/view/618
El valor del tiempo en los desplazamientos al trabajo en el sector urbano y su incidencia en la economía familiar del cantón Riobamba
Authors: Zurita Moreano Eduardo , González Bautista María , Rivera Poma Mauricio
Published: November 2019

El presente artículo estudia el valor monetario en los tiempos de viaje empleados por el jefe de hogar al lugar de trabajo y su efecto en la economía familiar, basándose en factores socioeconómicos, transporte y movilidad. Se utilizó un modelo econométrico de regresión logística (RL) Logit para un panel de datos de 397 trabajadores obtenidos de una encuesta de movilidad en los domicilios y lugares de trabajo en un día laborable directamente realizado a los jefes/as de hogar, los resultados mostraron el costo de oportunidad individual representado por el costo monetario del tiempo de viaje invertido.
Palabras clave: Costo de Oportunidad, Economía Familiar, Utilidad marginal, Valor del tiempo.
URL: http://revistas.uta.edu.ec/erevista/index.php/bcoyu/article/view/622