scholarly journals Policy-Driven Network Traffic Rerouting Through Intent-Based Control Loops

2019 ◽  
Author(s):  
Nathan Saraiva ◽  
Nazrul Islam ◽  
Danny Alex Lachos Perez ◽  
Christian Esteve Rothenberg
Keyword(s):  
Video Quality ◽  
Video Content ◽  
Video Traffic ◽  
Multimedia Services ◽  
Control Loops ◽  
Low Level ◽  
Http Adaptive Streaming ◽  
High Level ◽  
New Generation

Year after year, the growth of video traffic over the Internet keeps increasing. Video streaming over best-effort networks is considered inefficient and inappropriate to meet the expected Quality of Experience (QoE) of the new generation of multimedia services. Over the past few years, a number of technologies have emerged to improve the state of the art of video delivery, including HTTP Adaptive Streaming (HAS) that adapts the bitrate according to network conditions. At the crossroads, Software Defined Networking (SDN) offers options to meet Quality of Service (QoS) objectives for improved video quality by exploiting end-to-end programmability of network behaviour. However, traditional SDN approaches require dealing with low-level details from the underlying infrastructure, interfering in the automation and agility of service deployments. To alleviate these issues and overall provide a simpler approach, Intent-Based Networking (IBN) is being proposed to abstract low-level configurations through high-level policy interfaces. In this paper, we explore such an approach by implementing intent-based control loops for video service assurance. The proposed methods dynamically reconfigure the network for service-specific requirements using IBN to define the high-level behavior. We experimentally evaluate a use case where video traffic is rerouted based on network conditions to improve the QoS. The Proof-of-Concept results point to the potential of improving video content delivery through QoS-aware Intent-based approaches.

scholarly journals New Recommendation for Subjective Video Quality Assessment Methods for Recognition Tasks

2021 ◽  
Author(s):  
Mikołaj Leszczuk ◽  
Lucjan Janowski
Keyword(s):  
Quality Of Experience ◽  
Target Recognition ◽  
Video Quality ◽  
Service Performance ◽  
Visual Performance ◽  
Subjective Test ◽  
Multimedia Services ◽  
Objective Quality ◽  
High Level

It was once thought that high QoS (Quality of Service) performance solves recurrent problems of low-quality multimedia services. Since then, solutions have been proposed to ensure a high level of QoE (Quality of Experience). In this document, the authors attempt to outline their understanding of an accurate meaning of quality of multimedia services. Starting from QoS and passing through generalised QoE, the authors focus on aspects of subjective and objective quality modelling and optimisation of visual performance for TRV (Target Recognition Video) applications (such as video surveillance), outlining the path of ITU-T standardisation in this area. The authors revised the ITU-T Recommendation P.912 to reflect improved subjective test techniques developed since this Recommendation was approved. The authors also attempt to predict at least some existing errors of reasoning, which are likely to become evident for the industry in the next decade.

Morphological traits of the development of the skin and wool cover in sheep of Prikatunsky meat and wool type

2021 ◽  
pp. 60-68
Author(s):  
I. I. Dmitrik ◽  
G. V. Zavgorodnyaya ◽  
M. I. Pavlova ◽  
N. A. Podkorytov
Keyword(s):  
Physical Properties ◽  
Morphological Traits ◽  
Age Groups ◽  
Body Side ◽  
Low Level ◽  
Research Material ◽  
High Level ◽  
Significant Factors

A large number of works are devoted to the development of the skin and hair cover of sheep, depending on their breed affiliation, age, feeding conditions and housing. The authors point out that along with other conditions the quality of wool and wool clip is greatly influenced by the conditions of the feeding of animals. A high level of feeding increases the wool clip and improves the quality of the wool and vice versa a low level reduces, causes thinning and worsens other physical properties of the wool. As is known, one of the significant factors that determine the increase in wool clip is the size of the animal and, consequently, the total area of the skin. The purpose of the research was to investigate the morphological traits of the development of the skin and wool cover in sheep of Prikatunsky meat and wool type. The research material was wool samples from four topographic areas of the animal’s body (side/thigh/back/belly) and skin (side) of different sex and age groups, selected from the animals of the studied groups. In the course of research, the quality of wool and indicators of the histostructure of the skin of Prikatunsky meat and wool type of sheep have been investigated. In terms of thick-haired of wool, replacement rams and gimbers of Prikatunsky meat and wool type of sheep were superior by 4,82 pcs. per mm² or 19,0 % and 4,41 pcs. per mm² or 15,8 % of adult animals, respectively. Balance secondary follicles/primary follicles in young animals were higher by 10,3 and 17,3 % compared to breeding rams and ewes. The wool of the replacement young animals was thinner by 7,28 and 4,78 microns and they were more thick-haired. The obtained data will be used in the mating campaign when mating program rams in order to improve the sheep of Prikatunsky meat and wool type.

scholarly journals A Comparative Study to Assess the Quality of Life and Stress among Orphan and Non-orphan Children in Selected Areas of Bagalkot

2020 ◽  
Vol 11 (04) ◽  
pp. 19-25
Author(s):  
Santosh B Sajjan ◽  
Keyword(s):  
Quality Of Life ◽  
High Stress ◽  
Poor Quality ◽  
Demographic Variables ◽  
Self Report ◽  
Stress Scale ◽  
Low Level ◽  
High Level ◽  
Moderate Stress

Introduction: The word orphan comes from the Greek word ‘Orfanos’ and refers to a child permanently bereaved of or abandoned by his or her parents. Methods: A non-experimental descriptive comparative design has been adopted for the present study. The sample of the present study comprises orphan children residing in an orphanage and non-orphan children residing in selected areas of Bagalkot. The sample comprised 30 orphans and 30 non-orphans aged between 10 and 16 years. The data were collected by using self-report, structured closed-ended questionnaires for socio-demographic variables of children, self-administered WHO Quality of life BREF scale, and PSS stress scale. The data obtained were analysed with the help of descriptive and inferential statistics. Result: Findings related to the comparison between the level of stress among the orphan and non-orphan children revealed that majority of orphan children (76.66%) had about moderate stress, 23.33% of the orphan children had high stress, and none of the children had a low level of stress, whereas among non-orphan children, majority (90%) had moderate stress, 10% had low level stress, and none of them had high level stress. The findings related to the comparison of levels of quality of life among the orphan and non-orphan children reveal that a high percentage of orphan children (66.66%) had a moderate quality of life and some of them (33.33%) had a poor quality of life, whereas a high number of non-orphan children (66.66%) had a very good quality of life and some (33.33%) had a good quality of life. No significant association was found between the quality of life and stress scores with the socio-demographic variables of orphan and non-orphan children. Conclusion: The study concluded that orphan children need to improve their quality of life and decrease their level of stress.

Analyzing the Quality of Aesthetic Surgery Procedure Videos on TikTok

2021 ◽  
Author(s):  
Anjali Om ◽  
Bobby Ijeoma ◽  
Sara Kebede ◽  
Albert Losken
Keyword(s):  
Social Media ◽  
Breast Augmentation ◽  
Cosmetic Surgery ◽  
Video Quality ◽  
Aesthetic Surgery ◽  
Video Content ◽  
Medical Providers ◽  
Cosmetic Procedure ◽  
Different Content

Abstract Background TikTok is one of the most popular and fastest growing social media apps in the world. Previous studies have analyzed the quality of patient education information on older video platforms, but the quality of plastic and cosmetic surgery videos on TikTok has not yet been determined. Objectives To analyze the source and quality of certain cosmetic procedure videos on TikTok. Methods The TikTok mobile application was queried for content related to two popular face procedures (rhinoplasty and blepharoplasty) and two body procedures (breast augmentation and abdominoplasty). Two independent reviewers analyzed video content according to the DISCERN scale, a validated, objective criteria that assesses the quality of information on a scale of 1-5. Quality scores were compared between videos produced by medical and nonmedical creators and between different content categories. Results There were 4.8 billion views and 76.2 million likes across included videos. Videos were created by MDs (56%) and laypersons (44%). Overall average DISCERN score out of 5 corresponded to very poor video quality for rhinoplasty (1.55), blepharoplasty (1.44), breast augmentation (1.25) and abdominoplasty (1.29). DISCERN scores were significantly higher among videos produced by MDs than by laypersons for all surgeries. Comedy videos consistently had the lowest average DISCERN scores, while educational videos had the highest. Conclusions It is increasingly important that medical professionals understand the possibility of patient misinformation in the age of social media. We encourage medical providers to be involved in creating quality information on TikTok and educate patients about misinformation to best support health literacy.

scholarly journals A Mobile Fog Computing-Assisted DASH QoE Prediction Scheme

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Hongyun Zheng ◽  
Yongxiang Zhao ◽  
Xi Lu ◽  
Rongzhen Cao
Keyword(s):  
Quality Of Experience ◽  
Fog Computing ◽  
Video Quality ◽  
Adaptive Streaming ◽  
Network Operator ◽  
Video Traffic ◽  
Client Server ◽  
Prediction Scheme ◽  
Network Equipment

Video service has become a killer application for mobile terminals. For providing such services, most of the traffic is carried by the Dynamic Adaptive Streaming over HTTP (DASH) technique. The key to improve video quality perceived by users, i.e., Quality of Experience (QoE), is to effectively characterize it by using measured data. There have been many literatures that studied this issue. Some existing solutions use probe mechanism at client/server, which, however, are not applicable to network operator. Some other solutions, which aimed to predict QoE by deep packet parsing, cannot work properly as more and more video traffic is encrypted. In this paper, we propose a fog-assisted real-time QoE prediction scheme, which can predict the QoE of DASH-supported video streaming using fog nodes. Neither client/server participations nor deep packet parsing at network equipment is needed, which makes this scheme easy to deploy. Experimental results show that this scheme can accurately detect QoE with high accuracy even when the video traffic is encrypted.

Powered Ankle-Foot Prostheses: A Survey on Sensing Systems and Control Strategies

2019 ◽  
Author(s):  
Erik Chumacero-Polanco ◽  
James Yang
Keyword(s):  
Control Strategies ◽  
Level Control ◽  
Low Level ◽  
Kinetic Information ◽  
Sensing Systems ◽  
Systems And Control ◽  
Finite State ◽  
High Level ◽  
And Control

Abstract People who have suffered a transtibial amputation show diminished ambulation and impaired quality of life. Powered ankle foot prostheses (AFP) are used to recover some mobility of transtibial amputees (TTAs). Powered AFP is an emerging technology that has great potential to improve the quality of life of TTAs with important avenues for research and development in different fields. This paper presents a survey on sensing systems and control strategies applied to powered AFPs. Sensing kinematic and kinetic information in powered AFPs is critical for control. Ankle angle position is commonly obtained via potentiometers and encoders directly installed on the joint, velocities can be estimated using numerical differentiators, and accelerations are normally obtained via inertial measurement units (IMUs). On the other hand, kinetic information is usually obtained via strain gauges and torque sensors. On the other hand, control strategies are classified as high- and low-level control. The high-level control sets the torque or position references based on pattern generators, user’s intent of motion recognition, or finite-state machine. The low-level control usually consists of linear controllers that drive the ankle’s joint position, velocity, or torque to follow an imposed reference signal. The most widely used control strategy is the one based on finite-state machines for the high-level control combined with a proportional-derivative torque control for low-level. Most designs have been experimentally assessed with acceptable results in terms of walking speed. However, some drawbacks related to powered AFP’s weight and autonomy remain to be overcome. Future research should be focused on reducing powered AFP size and weight, increasing energy efficiency, and improving both the high- and the low-level controllers in terms of efficiency and performance.

Comparison of quality of facial scars after single low-level laser therapy and combined low-level with high-level (PDL 595 nm) laser therapy

2015 ◽  
Vol 28 (4) ◽  
pp. 201-209 ◽  
Author(s):  
Jana Vranova ◽  
Eva Remlova ◽  
Helena Jelinkova ◽  
Jozef Rosina ◽  
Tatjana Dostalova
Keyword(s):  
Laser Therapy ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
High Level

scholarly journals PENERAPAN DATA MINING DALAM MENGELOMPOKAN PRODUKSI JAGUNG MENURUT PROVINSI MENGGUNAKAN ALGORITMA K-MEANS

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Nanda Erlangga ◽  
Solikhun Solikhun ◽  
Irawan Irawan
Keyword(s):  
Data Mining ◽  
Clustering Algorithm ◽  
Rapid Development ◽  
Domestic Market ◽  
Corn Production ◽  
Low Level ◽  
High Level ◽  
Level Cluster ◽  
Central Statistics

Corn needs are currently experiencing a fairly rapid development can be seen in terms of the domestic market, here researchers want to increase the productivity and quality of corn production. The data that will be used is the data from the Central Statistics Agency. The method in this study is the K-means clustering algorithm and the application used is Rapidminer which will be grouped into 2 clustering, namely high and low. The results of this study are 2 high level cluster provinces, 32 low level cluster provincesKeywords: Corn, Data mining, K-means Clustering c

scholarly journals ANALISIS BUKU AJAR MARUGOTO: BAHASA DAN KEBUDAYAAN JEPANG A1 DITINJAU DARI RANAH KOGNITIF TAKSONOMI BLOOM

2018 ◽  
Vol 3 (1) ◽  
pp. 24
Author(s):  
Rakhmania Wulandari ◽  
Febi Ariani Saragih
Keyword(s):  
Bloom's Taxonomy ◽  
Data Sources ◽  
Learning Needs ◽  
Language And Culture ◽  
Low Level ◽  
Descriptive Research ◽  
Bloom’S Taxonomy ◽  
Qualitative Descriptive ◽  
High Level

Penelitian ini bertujuan untuk mengetahui kualitas isi buku ajar Marugoto: Bahasa dan Kebudayaan Jepang A1 ditinjau dari ranah kognitif taksonomi Bloom.  Kualitas buku ajar menjadi pertimbangan pengajar dalam menentukan buku ajar yang baik untuk digunakan. Menelaah kualitas buku ajar dapat dilakukan dengan menggunakan teori belajar taksonomi Bloom. Taksonomi Bloom adalah pengelompokan belajar berdasarkan tingkatan belajar. Yaitu belajar tingkat rendah yang terdiri dari kualifikasi C1 (mengingat), C2 (memahami), dan C3 (mengaplikasikan), serta belajar tingkat tinggi yang terdiri dari kualifikasi  C4 (menganalisis), C5 (mengevaluasi), dan C6 (mencipta).Penelitian ini merupakan penelitian deskriptif kualitatif. Sumber data utama adalah buku ajar Marugoto rikai dan katsudou. Analisis dilakukan dengan menganalisis bahan ajar menggunakan kualifikasi kognitif pada taksonomi Bloom. Hasil Analisis menunjukkan bahwa buku Marugoto A1 mencapai hasil yang sangat baik pada kualifikasi C1, C2, C3, C4; hasil analisis baik pada C5, dan  hasil analisis sangat kurang pada C6. Materi yang disajikan mewakili kata kerja operasioanal dalam memenuhi kebutuhan belajar tingkat rendah dengan sangat baik, namun hanya cukup mewakili kata kerja operasional dalam memenuhi kebutuhan belajar tingkat tinggi.   This research is aimed to find out the quality of Marugoto's textbook content: Japanese Language and Culture A1 from the cognitive aspects of Bloom's taxonomy. The quality of textbooks becomes the teacher's consideration in determining which textbooks are best used. Reviewing the quality of textbooks can be done using Bloom's theory of taxonomic learning. Bloom's Taxonomy is a learning grouping based on the level of learning. That is a low level study consisting of qualifications C1 (remembering), C2 (understanding), and C3 (applying), as well as a high-level learning consisting of C4 qualifying (analyzing), C5 (evaluating), and C6 (creating). is a qualitative descriptive research. The main data sources are Marugoto rikai and katsudou textbooks. The analysis was done by analyzing the teaching materials using cognitive qualifications on Bloom's taxonomy. The analysis shows that Marugoto: Language and Culture of Japan A1 achieved excellent results on qualification C1, C2, C3, C4, good analytical results on C5, and the result of analysis is very less on C6. The material presented represents operational verbs in meeting low-level learning needs very well, but only enough to represent operational verbs in meeting high-level learning needs.

scholarly journals Assessment of adaptation of children of younger school age with cerebral palsy to occupations at correctional school

2018 ◽  
Vol 9 (2) ◽  
pp. 55-66
Author(s):  
Olga P. Ponomareva ◽  
Galina A. Suslova
Keyword(s):  
Quality Of Life ◽  
Elementary School ◽  
Cerebral Palsy ◽  
Educational Institution ◽  
Psychomotor Development ◽  
Medical Psychology ◽  
School Age ◽  
Low Level ◽  
High Level

Formation of a school maturity at children of younger school age is the main objective of modern education. Special attention in the last decades is paid to children with disturbances of a musculoskeletal system, in particular, to children with the cerebral palsy (CP). Such children study at special correctional schools which prepare the pupils for independent life and work in society. Research objective: to estimate adaptation of children of younger school age with cerebral palsy to occupations at correctional school. Materials and methods. 75 children with the diagnosis are examined: Cerebral palsy, spastic diplegia mild or moderate severity, delay of psychomotor development, pseudobulbar dysarthtia. All children studied in state-funded educational institution for children with limited opportunities of health special (correctional) comprehensive school (the IV look) No. 584 "Ozerki" of Vyborgsky district of St. Petersburg (school No. 584 "Ozerki"). The age of children was from 7 to 11 years. The following indicators were estimated: quality of life of children by means of the questionnaire of PedsQL for category of children of 8-12 years, electroencephalogram indicators, the neurologic status, extent of disturbance of the speech. Children were examined by the neurologist, the psychologist and the logopedist. Results. 72% of children had the average and low level of adaptation. According to classification by L.A. Wagner (1989), “the low level” of adaptation prevailed at boys (42.2%) (the negative relation to school, suppressed mood, frequent complaints to an illness). “High level” also dominated at boys (33.4%) while at girls “the high level” of adaptation was observed only at 6 people (20%). Clinical inspection taped that at children the hyper excitability syndrome prevailed (at boys – 51.2%, girls – 63.3%). Also it was noticed that extent of disturbance of the speech depends on degree of a lesion of the central nervous system and also on age and sex features. The quality of life of children of elementary school is reduced. In scales of the questionnaire of PedsQL “physical functioning”, “emotional functioning”, “life at school” points don’t exceed 50. Only in a scale “social functioning” an indicator more than 70 points. Conclusions. The complex rehabilitation including the medical, psychology and pedagogical and logopedic care is necessary for children of elementary school of school No. 584 “Ozerki”.

Sign in / Sign up

Export Citation Format

Share Document