Search results for "stream"

H.264 QoS and Application Performance with Different Streaming Protocols

2015

Streaming techniques, including the selected streaming protocol, have an effect on the streaming quality. In this study, the performance of three different streaming protocols in a disturbed communication channel is evaluated with a modified version of the FFPlay player. A H.264 encoded video is used as a test sequence. The number of displayed image frames, the frame rate and playout duration are used as objective metrics for QoS. The metrics brings out differences of streaming protocols in our test environment. They are measured at the application level and have a connection to the user experience. peerReviewed

Software Renting in the Era of Cloud Computing

2012

In the new era of computing, software can be sold and delivered as a cloud service, and software renting has become as a strategic tool to compete in the market. Software renting has several advantages from the customer's point of view. However, for software providers it is challenging to ensure a profitable revenue stream when a license fee is replaced by a periodic rental fee. In this study, software renting was found to help the case firms to differentiate themselves from competitors; it also increased their competitive advantage by making the software available for a larger customer group. However, the negotiating power of larger customers impacted on software pricing, rental agreements…

Modelling Recurrent Events for Improving Online Change Detection

2016

The task of online change point detection in sensor data streams is often complicated due to presence of noise that can be mistaken for real changes and therefore affecting performance of change detectors. Most of the existing change detection methods assume that changes are independent from each other and occur at random in time. In this paper we study how performance of detectors can be improved in case of recurrent changes. We analytically demonstrate under which conditions and for how long recurrence information is useful for improving the detection accuracy. We propose a simple computationally efficient message passing procedure for calculating a predictive probability distribution of …

Scalable implementation of dependence clustering in Apache Spark

2017

This article proposes a scalable version of the Dependence Clustering algorithm which belongs to the class of spectral clustering methods. The method is implemented in Apache Spark using GraphX API primitives. Moreover, a fast approximate diffusion procedure that enables algorithms of spectral clustering type in Spark environment is introduced. In addition, the proposed algorithm is benchmarked against Spectral clustering. Results of applying the method to real-life data allow concluding that the implementation scales well, yet demonstrating good performance for densely connected graphs. peerReviewed

Video Streaming and Internalized Surveillance

2018

This paper aims to develop knowledge about the complicated ways in which the modern individual uses surveillance (techniques) and the ways surveillance uses the individual. My observational analysis of a videostreaming community reveals the central role that surveillance plays in participating and becoming visible in an online environment. The results show that through disciplinary and lateral surveillance, participants produced context-defined I-narrations and formed themselves following the normative judgment of the environment. The same mechanism may be observed in other videostreaming social media environments and the modern social media-saturated society in general. This is an inconspi…

Strengthening Institutional Isomorphism in Development NGOs? Program Mechanisms in an Organizational Intervention

2017

Nongovernmental organizations (NGOs) in international development struggle between being actors in the mainstream or representatives of alternatives to it. However, many NGOs all over the world align with the mainstream and are increasingly similar to each other. This homogenization results from institutional isomorphism, which is affected by their aspirations to be legitimate vis-á-vis the international field. Consultancies are among the main practices to promote normative isomorphism, but little is known about their micro-level dynamics. Drawing on the notion of program mechanisms in realistic evaluation, we scrutinize how external facilitators in organizational development processes enab…

Gender and development - no-man's land revisited : learning from men's inclusion discourse and practice in Uganda

2006

Integraatio ja sen toimivuus lastentarhanopettajan arvioimana

1999

Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses

2021

The submerged hydraulic jump is a sudden change from the supercritical to subcritical flow, specified by strong turbulence, air entrainment and energy loss. Despite recent studies, hydraulic jump characteristics in smooth and rough beds, the turbulence, the mean velocity and the flow patterns in the cavity region of a submerged hydraulic jump in the rough beds, especially in the case of triangular macroroughnesses, are not completely understood. The objective of this paper was to numerically investigate via the FLOW-3D model the effects of triangular macroroughnesses on the characteristics of submerged jump, including the longitudinal profile of streamlines, flow patterns in the cavity regi…

Code-switching in a Finnish video game stream

2017

Tämä tutkielma käsittelee erään suomalaisen videopelaajan koodinvaihtoa suomen ja englannin kielen välillä suoratoistopalvelussa eli striimissä (engl. stream). Videopelin pelaamisen ja pelikavereilleen kommunikoimisen lisäksi striimaajiksi kutsutut henkilöt puhuttelevat myös yleisöään. Tutkimuksen kohteeksi valittiin yksi puolitoista tuntia kestävä istunto, jossa koodinvaihtoa tapahtuu runsaasti. Koodinvaihto englannin ja suomen välillä on yleistä pelattaessa videopelejä, joissa englannin kieli on vahvasti läsnä sekä visuaalisissa että auditiivisissa elementeissä. Tutkielman tarkoituksena oli selvittää, millaisia koodinvaihtotilanteita striimissä esiintyy ja mitä syitä niiden esiintymiselle…