scholarly journals QoS-Based Service-Time Scheduling in the IoT-Edge Cloud

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5797
Author(s):  
Briytone Mutichiro ◽  
Minh-Ngoc Tran ◽  
Young-Han Kim
Keyword(s):  
Service Time ◽  
Traffic Patterns ◽  
Performance Requirements ◽  
Resource Requirements ◽  
Time Scheduling ◽  
Improved Performance ◽  
Container Orchestration ◽  
Different Characteristics ◽  
Heterogeneous Workloads

In edge computing, scheduling heterogeneous workloads with diverse resource requirements is challenging. Besides limited resources, the servers may be overwhelmed with computational tasks, resulting in lengthy task queues and congestion occasioned by unusual network traffic patterns. Additionally, Internet of Things (IoT)/Edge applications have different characteristics coupled with performance requirements, which become determinants if most edge applications can both satisfy deadlines and each user’s QoS requirements. This study aims to address these restrictions by proposing a mechanism that improves the cluster resource utilization and Quality of Service (QoS) in an edge cloud cluster in terms of service time. Containerization can provide a way to improve the performance of the IoT-Edge cloud by factoring in task dependencies and heterogeneous application resource demands. In this paper, we propose STaSA, a service time aware scheduler for the edge environment. The algorithm automatically assigns requests onto different processing nodes and then schedules their execution under real-time constraints, thus minimizing the number of QoS violations. The effectiveness of our scheduling model is demonstrated through implementation on KubeEdge, a container orchestration platform based on Kubernetes. Experimental results show significantly fewer violations in QoS during scheduling and improved performance compared to the state of the art.

scholarly journals AI-based localization and classification of skin disease with erythema

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ha Min Son ◽  
Wooho Jeon ◽  
Jinhyun Kim ◽  
Chan Yeong Heo ◽  
Hye Jin Yoon ◽  
...  
Keyword(s):  
Neural Network ◽  
Skin Diseases ◽  
Classification Model ◽  
Screening Tests ◽  
Sensitivity Score ◽  
Common Skin ◽  
Novel Method ◽  
Improved Performance ◽  
High Level

AbstractAlthough computer-aided diagnosis (CAD) is used to improve the quality of diagnosis in various medical fields such as mammography and colonography, it is not used in dermatology, where noninvasive screening tests are performed only with the naked eye, and avoidable inaccuracies may exist. This study shows that CAD may also be a viable option in dermatology by presenting a novel method to sequentially combine accurate segmentation and classification models. Given an image of the skin, we decompose the image to normalize and extract high-level features. Using a neural network-based segmentation model to create a segmented map of the image, we then cluster sections of abnormal skin and pass this information to a classification model. We classify each cluster into different common skin diseases using another neural network model. Our segmentation model achieves better performance compared to previous studies, and also achieves a near-perfect sensitivity score in unfavorable conditions. Our classification model is more accurate than a baseline model trained without segmentation, while also being able to classify multiple diseases within a single image. This improved performance may be sufficient to use CAD in the field of dermatology.

scholarly journals Environmental quality evaluation of lakes in the Rio Grande do Sul coastal plain

2007 ◽  
Vol 50 (4) ◽  
pp. 673-685 ◽  
Author(s):  
Catarina da Silva Pedrozo ◽  
Odete Rocha
Keyword(s):  
Environmental Quality ◽  
Sewage Treatment ◽  
Principal Component ◽  
Organic Pollution ◽  
Physical And Chemical Variables ◽  
Environmental Element ◽  
Different Characteristics ◽  
Physical And Chemical ◽  
The Town

The purpose of the present work was to evaluate the environmental quality of Marcelino, Pinguela, Peixoto, Palmital, Malvas and Do Passo lakes, interconnected by canals and located in the district of Osório, RS. In this context, 29 physical and chemical variables were analyzed with sampling carried out in January, May, July and October 1997 to verify the environmental quality of the system and the existence of a gradient of quality. Canonical Analysis was applied to the data of all environmental variables measured, and showed that the lakes had different characteristics as a consequence of the organic pollution received. Marcelino lake received continuous input of organic matter from the sewage treatment works in the town of Osório, whereas Peixoto, Pinguela, Palmital, Malvas and Do Passo lakes resembled other water bodies described in the region, not showing, so far, signs of degradation caused by the input of effluents. Principal Component Analysis selected environmental element were directly linked to organic pollution, that reflected sequential non-recent effects of contamination.

scholarly journals KOMITE AUDIT UNTUK MENINGKATKAN TATA KELOLA PEMERINTAHAN DAN PENYAJIAN LAPORAN KEUANGAN DALAM RANGKA PENINGKATAN KINERJA PEMERINTAH DAERAH (STUDI KASUS PEMERINTAH DAERAH KABUPATEN BELITUNG)

2014 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Alexander Ikhsan ◽  
Antar MT Sianturi
Keyword(s):  
Local Government ◽  
Audit Committee ◽  
Good Governance ◽  
Financial Statements ◽  
Financial Statement ◽  
Audit Committees ◽  
Government Performance ◽  
Qualitative Descriptive ◽  
Improved Performance

This research is a qualitative descriptive study entitled “Audit Committee to Improve Governance and Financial Statement in order to Improved Performance of Local Government (Case Study of District Government Belitung)”. The purpose of this study was to determine how much influence of the audit committee in the local government in order to improve governance and the quality of local government financial statement, and its associations with local government performance. Measuring the importance of the audit committee, which was measured using interviews with 15 respondents who have an influence on governance in the Belitung District Based on these results, we can conclude that audit committees in local government will improve the governance and the quality of local government financial statements presentation. And from the results of this study also found that the good governance and quality of local government financial statements presentation will improve the overall local government performance

scholarly journals Atributos desejáveis para gramados a serem cultivados sob condições brasileiras: uma proposta

2016 ◽  
Vol 22 (2) ◽  
pp. 154 ◽  
Author(s):  
Francisco Humberto Dübbern de Souza ◽  
Marcos Rafael Gusmão ◽  
Frederico De Pina Matta ◽  
Ana Cecília Ribeiro De Castro ◽  
Andréa Mittelmann ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Life Quality ◽  
Urban Populations ◽  
Research Programs ◽  
Ground Coverage ◽  
Different Characteristics ◽  
Environmental Functions

Turfgrass cultivation is a multi-purpose popular practice, associated with life quality of urban populations in consequence of its capability of providing safe, pleasant environments, suitable for recreational and sportive activities. Additionally, it plays relevant environmental functions. For these reasons, turfgrasses constitute an important segment of the agribusiness in many countries. In Brazil, the importance of this type of cultivation has increased in spite of the reduced number of available turfgrass cultivars. Research programs aiming the exploitation of his ample genetic diversity could promote Brazil to the forefront of this type of agriculture in the tropical world. In this work, we discussed and proposed degrees of relevance for different characteristics of grass plants destined for use as permanent ground coverage under a variety of Brazilian situations.

The Performance of Educational Institutions Through the Electronic Records Management Systems

2020 ◽  
pp. 1578-1598
Author(s):  
Muaadh Mukred ◽  
Zawiyah M. Yusof
Keyword(s):  
Quantitative Method ◽  
Positive Relationship ◽  
Educational Institutions ◽  
Records Management ◽  
Qualitative Approaches ◽  
System Information ◽  
Improved Performance ◽  
The Relationship ◽  
Electronic Records Management

This article discusses the relationship between educational institutes that use ERMS and the performance of those institutions. This article uses a mixed explanatory method that incorporated quantitative and qualitative approaches. The quantitative method collected the responses from 364 participants. This was followed by a qualitative approach where experts were interviewed to verify the model. The results generated using the quantitative approach demonstrated that the quality of the system, information, and service as well as the security provided by the system had a significant positive relationship with the successful adoption of ERMS, which in turn improved performance. Moreover, the qualitative results that gathered through the experts confirmed the findings and contributed to enriching the understanding of the adoption of ERMS in educational institutions.

Optimum Volume of Freeway Corridors

2020 ◽  
Vol 2674 (3) ◽  
pp. 27-36
Author(s):  
Siavash Shojaat ◽  
Justin Geistefeldt ◽  
Brian Wolshon
Keyword(s):  
Quality Of Service ◽  
Real World ◽  
Flow Index ◽  
Traffic Demand ◽  
Probability Of Survival ◽  
Freeway Corridors ◽  
Freeway Corridor ◽  
Different Characteristics ◽  
Optimum Volume

Conventional methods to assess the quality of service on freeways are based on the comparison of a specific peak hour traffic demand to the capacity of the facility, which is usually measured at a single uniform bottleneck section. However, estimating the quality of service of one bottleneck section may not be sufficient to assess the performance of an entire freeway facility. A driver traveling along a freeway corridor may actually encounter multiple flow breakdowns at independent bottleneck sections, which affect the overall quality of service. This paper introduces a comprehensive approach that considers an entire freeway corridor as a system consisting of successive independent bottlenecks with different characteristics, and can be used to estimate the optimum sustainable volume. The methodology is based on the sustained flow index, which is defined as the product of traffic volume and the probability of survival at this volume. Optimum volumes of two real-world corridors are estimated based on the new derivations. The empirical results reveal that the optimum volume and the capacity of an entire corridor is less than those of its most restrictive bottleneck.

scholarly journals Active stabilization of unmanned aerial vehicle imaging platform

2020 ◽  
Vol 26 (19-20) ◽  
pp. 1791-1803 ◽  
Author(s):  
Mohit Verma ◽  
Vicente Lafarga ◽  
Mael Baron ◽  
Christophe Collette
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Vibration Isolation ◽  
Isolation System ◽  
Aerial Vehicles ◽  
Active Stabilization ◽  
Aerial Vehicle ◽  
Active Vibration ◽  
Improved Performance

The advancement in technology has seen a rapid increase in the use of unmanned aerial vehicles for various applications. These unmanned aerial vehicles are often equipped with the imaging platform like a camera. During the unmanned aerial vehicle flight, the camera is subjected to vibrations which hamper the quality of the captured images/videos. The high-frequency vibrations from the unmanned aerial vehicle are transmitted to the camera. Conventionally, passive rubber mounts are used to isolate the camera from the drone vibrations. The passive mounts are able to provide reduction in response near the resonance. However, this comes at the cost of amplification of response at the higher frequency. This article proposes an active vibration isolation system which exhibits improved performance at the higher frequencies than the conventional system. The active isolation system consists of a contact-less voice coil actuator supported by four springs. Experiments are carried out to study the effect of vibrations on the quality of images captured. The characterization of drone vibrations is also carried out by recording the acceleration during different flight modes. The performance of the proposed isolation system is experimentally validated on a real drone camera subjected to the recorded drone acceleration spectrum. The isolation system is found to perform better than the conventional rubber mounts and is able to reduce the vibrations to a factor of one-fourth. It can be effectively used to improve the image acquisition quality of the unmanned aerial vehicles.

EFFECTIVE ADMISSION CONTROL FOR POWER-CONTROLLED DS-CDMA SYSTEMS

2004 ◽  
Vol 13 (02) ◽  
pp. 325-339
Author(s):  
SEUNG HOON SHIN ◽  
KYUNG SUP KWAK
Keyword(s):  
Control Problem ◽  
Admission Control ◽  
Information Exchange ◽  
Call Admission Control ◽  
Base Stations ◽  
Constrained System ◽  
Call Admission ◽  
Cdma Systems ◽  
Improved Performance

Effective call admission control (CAC) is one of the most important techniques to provide the desired quality of service (QoS) in wireless networks. This paper investigates the call admission control problem for the power-controlled CDMA systems. With a macroscopic description for the power control problem, the call admission control for the power-constrained system is analyzed and an admissibility condition is derived. Based on the derived condition, we propose two CAC algorithms. One is an interactive method that provides the optimum performance, but requires some information exchange between base stations. The other can be implemented in a distributed manner and provide a reasonable performance. Through simulations, we show that the proposed algorithms provide an improved performance.

scholarly journals Evaluation of nutritional quality of biscuits and sweet snacks sold on the Italian market: the Food Labelling of Italian Products (FLIP) study

2020 ◽  
Vol 23 (15) ◽  
pp. 2811-2818 ◽  
Author(s):  
M Dall’Asta ◽  
A Rosi ◽  
D Angelino ◽  
N Pellegrini ◽  
D Martini
Keyword(s):  
Nutritional Quality ◽  
Salt Content ◽  
Product Type ◽  
Food Labelling ◽  
Cereal Products ◽  
Italian Market ◽  
Other Information ◽  
Quality Of Products ◽  
Different Characteristics

AbstractObjective:The present study aimed at surveying the nutritional quality of prepacked biscuits and sweet snacks sold on the Italian market, and at identifying whether the product type and other information reported on the pack could discriminate the overall quality of products analysed.Design:Data on energy, nutrient and salt content of the products from two different categories of prepacked sweet cereal products (i.e. biscuits and sweet snacks) were collected from thirteen retailers present on the Italian market. Based on the product type, nutrition and health claim (NHC) and gluten-free (GF) declaration, a comparison of nutrient profile within each category was performed.Setting:This work is part of the Food Labelling of Italian Products (FLIP) study that aims at systematically investigating the overall quality of the prepacked foods sold on the Italian market.Results:A total of 1290 products were analysed (63 % biscuits and 37 % sweet snacks). After comparing different product types within each category, a high intra-type product variability was evidenced, which was more pronounced for biscuits. Overall, NHC-carrying products seemed to have a better nutrition profile than those without claims, except for salt content. Conversely, a comparison between GF and gluten-containing products did not show consistent results within the two categories analysed.Conclusions:Due to the high intra-type variability within each category, the different characteristics and regulated information reported on the pack do not seem to be a clear marker of the overall nutritional quality of biscuits and snacks.

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