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Affichage de 1221 à 1230 sur 1985

Article dans une revue

Exergy assessment of heat transfer inside a Beta type Stirling engine

Houda Hachem, Ramla Gheith, Fethi Aloui, Sassi Ben Nasrallah, Ibrahim Dincer

This paper presents an assessment of both energy and exergy efficiencies of a Beta Stirling engine prototype with a 30 W capacity as the maximum mechanical power output. Its operating pressure is close to atmospheric pressure, and it supports a maximum hot end temperature of 650 degrees C. The...

International Journal of Exergy, 2016, 20 (2), pp.186-202. ⟨10.1504/IJEX.2016.076863⟩. ⟨hal-03447147⟩

Article dans une revue

Use of the PIV and Electrochemical Techniques to Experimentally Characterize the Couette-Taylor- Poiseuille Flow Instabilities

Wafik Abassi, Fethi Aloui, Sassi Ben Nasrallah, Jack Legrand

The Taylor-Couette problem is a fundamental model in bifurcation theory and hydrodynamic stability. The inner cylinder rotation generates a flow pattern known by a transition to turbulence through a sequence of successive hydrodynamic instabilities. The effect of an imposed axial flow on the...

Journal of Applied Fluid Mechanics, 2016, 9 (1), pp.59 - 68. ⟨10.36884/jafm.9.SI1.25910⟩. ⟨hal-01527258⟩

Article dans une revue

RFID interactive tabletop application with tangible objects: exploratory study to observe young children’ behaviors

Sébastien Kubicki, Marion Wolff, Sophie Lepreux, Christophe Kolski

Numerous academic and industrial studies and developments concerning interactive tabletops are paving the way for new educational applications. We have developed an interactive tabletop application equipped with RFID technology. This tabletop, called TangiSense, is based on a Multi-Agent System...

Personal and Ubiquitous Computing, 2015, 19 (8), pp.1259-1274. ⟨10.1007/s00779-015-0891-7⟩. ⟨hal-01264366⟩

Article dans une revue

Scalable row-based parallel H.264 decoder on embedded multicore processors

Elias Michel Baaklini, Santhosh Kumar Rethinagiri, Hassan Sbeity, Smail Niar

Multimedia applications are present in most mobile hand-held devices, which are still equipped with limited battery resources. The H.264 standard is currently dominating the video compression world. H.264 has high computational requirements in terms of memory, energy, and time. Many techniques...

Signal, Image and Video Processing, 2015, 9 (S1), pp.57-71. ⟨10.1007/s11760-014-0633-8⟩. ⟨hal-03578528⟩

Article dans une revue

Comparison Based on Exergetic Analyses of Two Hot Air Engines: A Gamma Type Stirling Engine and an Open Joule Cycle Ericsson Engine

Houda Hachem, Marie Creyx, Ramla Gheith, Eric Delacourt, Céline Morin, Fethi Aloui, Sassi Ben Nasrallah

In this paper, a comparison of exergetic models between two hot air engines (a Gamma type Stirling prototype having a maximum output mechanical power of 500 W and an Ericsson hot air engine with a maximum power of 300 W) is made. Referring to previous energetic analyses, exergetic models are set up...

Entropy, 2015, 17 (11), pp.7331-7348. ⟨10.3390/e17117331⟩. ⟨hal-03448497⟩

Article dans une revue

Thermocapillary instability in an evaporating two-dimensional thin layer film

Andriy A. Avramenko, Igor V. Shevchuk, Souad Harmand, Andrii I. Tyrinov

A novel two-dimensional model for the thermocapillary instability of a thin liquid film was developed and validated in the paper. The model incorporates a novel solution for the unperturbed velocity components and the thin film thickness (based on the boundary layer approach and balance equation)...

International Journal of Heat and Mass Transfer, 2015, 91, pp.77-88. ⟨10.1016/j.ijheatmasstransfer.2015.07.063⟩. ⟨hal-03448389⟩

Article dans une revue

Scheduling operating theatres: Mixed integer programming vs. constraint programming

Tao Wang, Nadine Meskens, David Duvivier

The daily scheduling of an operating theatre is a highly constrained problem. In addition to standard scheduling constraints, many additional constraints on human and material resources encountered in real life should be taken into account. These constraints concern the priority of operations, the...

European Journal of Operational Research, 2015, 247 (2), pp.401 - 413. ⟨10.1016/j.ejor.2015.06.008⟩. ⟨hal-01787907⟩

Article dans une revue

A two-stage flow shop scheduling problem with transportation considerations

Nacira Chikhi, Moncef Abbas, Rachid Benmansour, Abdelghani Bekrar, Said Hanafi

This paper considers a two-stage robotic flow shop scheduling problem of which the objective is to minimize the maximum completion time of all the jobs. The problem consists of two dedicated machines at the first stage and a single machine at the second stage. Each job is defined by two operations...

4OR: A Quarterly Journal of Operations Research, 2015, 13 (4), pp.381-402. ⟨10.1007/s10288-015-0297-4⟩. ⟨hal-03402138⟩

Article dans une revue

Framework for a Selection of Custom Instructions for Ht-MPSoC in Area-performance Aware Manner

Bouthaina Dammak, Mouna Baklouti, Rachid Benmansour, Smail Niar, Mohamed Abid

Using application-specific instructions for heterogeneous multiprocessor system-on-chip (Ht-MPSoC) allows to find a good performance/energy trade-off. For MPSoC architecture executing different multimedia applications, we expect a large number of potential custom instructions. In order to explore...

IEEE Embedded Systems Letters, 2015, 7 (4), pp.105-108. ⟨10.1109/LES.2015.2461626⟩. ⟨hal-03401079⟩

Article dans une revue

Simplified soft output demapper for non-binary LDPC codes

Latifa Mostari, Abdelmalik Taleb-Ahmed, Abdennacer Bounoua

Combining non-binary LDPC codes and high order constellation, namely Bit-Interleaved Coded Modula-tion (BICM), is a simple but effective way to improve the bandwidth efficiency. Since the non-binary LDPCcodes require soft decisions as the input information, the constellation has to provide soft...

Optik, 2015, 126 (24), pp.5074-5076. ⟨10.1016/j.ijleo.2015.09.210⟩. ⟨hal-03428153⟩