Utilization of remote sensing for estimation of scale of cutting and growing of forest zones

2017 ◽  
Vol 920 (2) ◽  
pp. 57-60
Author(s):  
F.E. Guliyeva
Keyword(s):  
Remote Sensing ◽  
Fixed Time ◽  
Time Interval ◽  
Time Points ◽  
Average Value ◽  
Time Period ◽  
Remote Estimation ◽  
The Given ◽  
Forest Cutting

The study of results of relevant works on remote sensing of forests has shown that the known methods of remote estimation of forest cuts and growth don’t allow to calculate the objective average value of forests cut volume during the fixed time period. The existing mathematical estimates are not monotonous and make it possible to estimate primitively the scale of cutting by computing the ratio of data in two fixed time points. In the article the extreme properties of the considered estimates for deforestation and reforestation models are researched. The extreme features of integrated averaged values of given estimates upon limitations applied on variables, characterizing the deforestation and reforestation processes are studied. The integrated parameter, making it possible to calculate the averaged value of estimates of forest cutting, computed for all fixed time period with a fixed step is suggested. It is shown mathematically that the given estimate has a monotonous feature in regard of value of given time interval and make it possible to evaluate objectively the scales of forest cutting.

scholarly journals Stochastic given-time H∞ consensus over Markov jump networks with disturbance constraint

2016 ◽  
Vol 39 (8) ◽  
pp. 1253-1261 ◽  
Author(s):  
Xiaoli Luan ◽  
Yang Min ◽  
Zhengtao Ding ◽  
Fei Liu
Keyword(s):  
Information Flow ◽  
Disturbance Rejection ◽  
Model Transformation ◽  
Fixed Time ◽  
Time Interval ◽  
Markov Jump ◽  
Fixed Time Interval ◽  
Directed Information ◽  
Simulation Results ◽  
The Given

In this study, the given-time H∞ consensus problem over networks with directed information flow and Markov jump topologies is addressed. Our focus is on keeping the disagreement dynamics of networks confined within the prescribed bound in the fixed time interval. Compared with the asymptotical consensus in infinite settling time, the proposed algorithm is less conservative. In addition, a new model transformation approach is presented to make the design results more advantageous in commonality. Simulation results show the effectiveness of the proposed controller, and reveal that the prescribed boundary of the disagreement trajectory has an effect on disturbance rejection performance.

scholarly journals Video Streaming Transfer in a Smart Satellite Mobile Environment

2009 ◽  
Vol 2009 ◽  
pp. 1-12 ◽  
Author(s):  
Nedo Celandroni ◽  
Franco Davoli ◽  
Erina Ferro ◽  
Alberto Gotta
Keyword(s):  
Video Streaming ◽  
Time Interval ◽  
Mobile Environment ◽  
Transmission Parameters ◽  
Time Period ◽  
Satellite Signal ◽  
Return Channel ◽  
Mobile Satellite ◽  
The Given

Transportation media are becoming “smart spaces”, where sophisticated services are offered to the passengers. We concentrate on video streaming provided on buses that move in urban, suburban, or highway environments. A content provider utilizes a DVB-S2 satellite link for transmitting video streams to a bus, where they are relayed to passengers' devices. We say that a bus works in smart mode if it takes advantage of the knowledge of the exact points where fixed obstacles will prevent receiving the satellite signal for a certain time period. This information is sent to the hub via a return channel. The hub, in its turn, suspends the transmissions to that specific bus for the given time interval, thus avoiding information losses and unnecessary bandwidth occupation. Buffering video packets, without any quality of service (QoS) degradation, seamlessly compensates channel blockages up to a given duration. We determine the most appropriate transmission parameters for video streaming with good video QoS in a mobile satellite environment; moreover, we evaluate how “smart” the system can be in terms of bandwidth saving, by comparing it with the situation where the bus does not exploit the description of its route, still maintaining the same QoS requirements.

The Ideology of Socialism and the Armenian Political Parties

wisdom ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 107-113
Author(s):  
Gegham HOVHANNISYAN
Keyword(s):  
Political Parties ◽  
Political Life ◽  
The Political ◽  
Political Organizations ◽  
Social Democrats ◽  
Time Period ◽  
The Social ◽  
Political Forces ◽  
The 19Th Century ◽  
The Given

The article covers the manifestations and peculiarities of the ideology of socialism in the social-political life of Armenia at the end of the 19th century and the beginning of the 20th century. General characteristics, aims and directions of activity of the political organizations functioning in the Armenian reality within the given time-period, whose program documents feature the ideology of socialism to one degree or another, are given (Hunchakian Party, Dashnaktsutyun, Armenian Social-democrats, Specifics, Socialists-revolutionaries). The specific peculiarities of the national-political life of Armenia in the given time-period and their impact on the ideology of political forces are introduced.

scholarly journals Optimal Control and Positional Controllability in a One-Sector Economy

Games ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 11
Author(s):  
Nikolai Grigorenko ◽  
Lilia Luk’yanova
Keyword(s):  
Optimal Control ◽  
Production Capacity ◽  
Quality Criterion ◽  
Zero Order ◽  
Suboptimal Control ◽  
Time Interval ◽  
Bounded Control ◽  
Optimal Value ◽  
Current Production ◽  
The Given

A model of production funds acquisition, which includes two differential links of the zero order and two series-connected inertial links, is considered in a one-sector economy. Zero-order differential links correspond to the equations of the Ramsey model. These equations contain scalar bounded control, which determines the distribution of the available funds into two parts: investment and consumption. Two series-connected inertial links describe the dynamics of the changes in the volume of the actual production at the current production capacity. For the considered control system, the problem is posed to maximize the average consumption value over a given time interval. The properties of optimal control are analytically established using the Pontryagin maximum principle. The cases are highlighted when such control is a bang-bang, as well as the cases when, along with bang-bang (non-singular) portions, control can contain a singular arc. At the same time, concatenation of singular and non-singular portions is carried out using chattering. A bang-bang suboptimal control is presented, which is close to the optimal one according to the given quality criterion. A positional terminal control is proposed for the first approximation when a suboptimal control with a given deviation of the objective function from the optimal value is numerically found. The obtained results are confirmed by the corresponding numerical calculations.

scholarly journals Remote Sensing for Cultural Heritage Assessment and Monitoring: The Case Study of Alba Iulia

2021 ◽  
Vol 13 (3) ◽  
pp. 1406 ◽  
Author(s):  
Cristian Moise ◽  
Iulia Dana Negula ◽  
Cristina Elena Mihalache ◽  
Andi Mihai Lazar ◽  
Andreea Luminita Dedulescu ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Cultural Heritage ◽  
Heritage Management ◽  
Time Interval ◽  
Urban Landscapes ◽  
Persistent Scatterer Interferometry ◽  
Heritage Site ◽  
Depth Analysis ◽  
Assessment And Monitoring ◽  
Historical Past

In recent times, satellite-based remote sensing has a growing role in archaeology and inherently in the cultural heritage management process. This paper demonstrates the potential and usefulness of satellite imagery for the documentation, mapping, monitoring, and in-depth analysis of cultural heritage and the archaeological sites located in urban landscapes. The study focuses on the assessment and monitoring of Alba Iulia, which is one of the Romanian cities with the richest historical past. Multitemporal analysis was performed to identify the land use/land cover changes that might contribute to an increased cultural heritage vulnerability to natural disasters. A special emphasis was dedicated to the assessment of the built-up area growth and consequently of the urbanization trend over a large time interval (30 years). Next, the urbanization and urban area expansion impact was further analyzed by concentrating on the urban heat island within Alba Iulia city and Alba Iulia Fortress (located in the center of the city). As temperature change represents a key element of climate change, the temperature trend within the same temporal framework and its impact on cultural heritage were determined. In the end, with regard to the cultural heritage condition assessment, the research was complemented with an assessment of the urban ground and individual building stability, using persistent scatterer interferometry. The results contribute to the detailed depiction of the cultural heritage site in such a manner that the site is monitored over an extensive timeframe, its current state of conservation is accurately determined, and the future trends can be identified. In conclusion, the present study offers reliable results regarding the main factors that might endanger the cultural heritage site as a basis for future preservation measures.

scholarly journals Radiomorphology of the Habib Sealer-Induced Resection Plane during Long-Time Followup:A Longitudinal Single Center Experience after 64 Radiofrequency-AssistedLiver Resections

HPB Surgery ◽  
2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Robert Kleinert ◽  
Roger Wahba ◽  
Christoph Bangard ◽  
Klaus Prenzel ◽  
Arnulf H. Hölscher ◽  
...  
Keyword(s):  
Liver Resection ◽  
Morphological Characteristics ◽  
Postoperative Mortality ◽  
Coagulation Necrosis ◽  
Time Interval ◽  
Safe Alternative ◽  
Time Points ◽  
Single Center Experience ◽  
Long Time

Background. Radiofrequency (RF-) assisted liver resection devices like the Habib sealer induce a necrotic resection plane from which a small margin of necrotic liver tissue remains in situ. The aim of the present paper was to report our long-time experience with the new resection method and the morphological characteristics of the remaining necrotic resection plane. Methods. 64 RF-assisted liver resections were performed using the Habib sealer. Followup was assessed at defined time points. Results. The postoperative mortality was 3,6% and morbidity was 18%. The followup revealed that the necrotic zone was detectable in all analyzed CT and MRI images as a hypodense structure without any contrast enhancement at all time points, irrespectively of the time interval between resection and examination. Conclusion. Liver resection utilizing radiofrequency-induced resection plane coagulation is a safe alternative to the established resection techniques. The residual zone of coagulation necrosis remains basically unchanged during a followup of three years. This has to be kept in mind when evaluating the follow up imaging of these patients.

A Method for Evaluating the Thermal Performance of Passenger Seats

2003 ◽  
Vol 217 (6) ◽  
pp. 449-459 ◽  
Author(s):  
E B Ratts ◽  
J W McElroy ◽  
W G Reed
Keyword(s):  
Thermal Performance ◽  
Thermal Energy ◽  
Water Source ◽  
Fixed Time ◽  
Test Method ◽  
Test Apparatus ◽  
Passenger Seat ◽  
Time Period ◽  
Seat Cushion ◽  
Heat And Moisture

In this paper, an experimental method to quantify the capability of an automotive seat to move heat and moisture away from the heat and water source is presented. To test the method, a test apparatus was constructed that generates heat and water vapour. The apparatus was placed on a seat cushion for a fixed time period. At the end of the period, heat and water transported were measured. These integrated values were used to quantify the seat's capability to move heat and moisture and ultimately to compare seats. By the impulse test method, the passenger seat had an effusivity of 94.7 W s1/2/m2 K. A non-ventilated seat transferred 5 W of thermal energy and an average of 0.36 g/min of water in 1800 s. A ventilated seat transferred 13.9 W of thermal energy and 0.70 g/min of water in 1800 s.

Evaluation of Effect of Nd:YAG and Er:YAG Lasers on the Periodontal Pathogens: A Systematic Review

2020 ◽  
Author(s):  
Hosein Eslami
Keyword(s):  
Systematic Review ◽  
Chronic Periodontitis ◽  
Complementary Therapy ◽  
Root Surface ◽  
Laser Wavelength ◽  
Time Interval ◽  
Periodontal Pathogens ◽  
Probing Depth ◽  
Treatment Procedures ◽  
The Given

Introduction: By removing the periodontal pathogens and even the invasive bacteria attacking the tissues as well as the lack of normal periodontal treatment procedures, using a laser, as a complementary therapy, can have positive and useful impacts. The present study aims at investigating the impacts of Nd:YAG and Er:YAG laser on periodontal pathogens. Materials and Methods: In this systematic review, articles in the databases of Google Scholar, PubMed and Scopus were searched within 2000-2020. All information is classified into a table. Results: In searching the aforementioned databases and considering the given time interval, 78 articles were found in connection to the searched keywords and abstracts. Once the repeated titles and articles were deleted, 25 studies were selected which were decreased to 16 by the meticulous review by the assessment team. The full text of these 16 articles was reviewed. To make the final choice, 8 articles had the inclusion criteria which included the objectives of this study. Conclusion: To use the laser in treating the chronic periodontitis, an evidence-based study seems to be conducted. A few scientific pieces of evidence are indicating the advantage of a special laser wavelength in the common treatments.Based on most researches reviewed in this study, the results of the complementary application of Nd:YAG and Er:YAG lasers in treating the chronic periodontitis are the better than the ones obtained from the normal teeth scaling and planning the teeth root surface in terms of the reduced probing depth and subgingival bacteria population. The decision was made to use the laser in periodontal surgery based on the advantages such as hemostasis and less pain after the treatment. However, more studies are needed to apply the laser in periodontal treatments.

Penerapan Metode Participatory Learning and Action (PLA) pada Pelatihan Uji Kompetensi Kejuruan

2021 ◽  
Vol 2 (4) ◽  
pp. 257-265
Author(s):  
Fransiskus Panca Juniawan ◽  
Marini Marini ◽  
Dwi Yuny Sylfania ◽  
Fernandy Ricardo Antonius ◽  
Sandy Gautama
Keyword(s):  
Teaching Material ◽  
Vocational High School ◽  
Participatory Learning ◽  
Average Value ◽  
Participatory Learning And Action ◽  
Post Test ◽  
Evaluation Stage ◽  
Training Activities ◽  
The Given ◽  
Implementation Stage

Abstrak: Ujian Kompetensi Keahlian (UKK) Nasional merupakan langkah pemerintah dalam meningkatkan keterampilan siswa Sekolah Menengah Kejuruan (SMK) hingga nanti menjadi salah satu penentu kelulusan siswa. Untuk membantu siswa dalam mempersiapkan UKK Nasional, SMK PGRI Pangkalpinang memberikan pelatihan yang berfokus pada peningkatan motivasi dan skill siswa dalam bidang multimedia. Kegiatan pelatihan dilaksanakan dengan metode Participatory Learning and Action (PLA) dimana partisipasi aktif dari siswa sangat diharapkan. Hal ini sesuai dengan fungsi PLA yang mengutamakan partisipasi, yang dapat berupa diskusi. Nantinya hasil diskusi inilah yang dijadikan acuan sebagai materi pengajaran kepada peserta. Kegiatan terdiri dari tahapan pra kegiatan, tahapan pelaksanaan kegiatan, dan tahapan evaluasi kegiatan. Tugas berupa simulasi UKK Nasional juga diberikan untuk mengetahui kesiapan siswa. Di akhir kegiatan juga diberikan survei post test untuk mengetahui tingkat keberhasilan kegiatan ini. Dari 10 pernyataan yang diberikan didapat nilai rataan sebesar 4,15 yang berarti siswa telah memahami materi yang diberikan dengan baik.Abstract: The National Skills Competency Examination (UKK) is one of government efforts to improve the skills of Vocational High School (SMK) students and become one of students' determinants of graduation. To assist students in preparing for the National UKK, SMK PGRI Pangkalpinang provides training that focuses on increasing students motivation and skills in the multimedia area. The training activities are conducted using the Participatory Learning and Action (PLA) method, where active participation from students is highly expected. This is in accordance with the PLA's function which prioritizes the participation, which can be held in the form of discussion. The results of this discussion will be used as a reference as teaching material to participants. The activity consists of the pre-activity stage, the activity implementation stage, and the activity evaluation stage. Assignments in the form of a National UKK simulation were also given to determine student readiness. At the end of the activity, a post-test survey was also given to determine the level of success of this activity. From the 10 statements given, the average value is 4.15, which means the students already understood the given material.

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