Instrumentation Mesure Métrologie

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ISSN / EISSN : 1631-4670 / 2269-8485
Total articles ≅ 290
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, Mhania Guerti
Instrumentation Mesure Métrologie, Volume 20, pp 137-142; doi:10.18280/i2m.200303

Abstract:
A reliable perceptive analysis implying several sessions of listening turns out to be consuming in time and in human resources, and therefore not allowing a regular use in clinical practice. At the level of the Ear, Nose and Throat (ENT) services the rehabilitative speech therapist is in charge of estimating by listening to the quality of the voice, which entraines a non reliable perceptive evaluation compared with the one that will be proposed in this work. In this study, objective instrumental approaches based on physical measures has been proposed. These approaches allowing the analysis and estimation of the acoustic characteristics of the voice of the patients having a total laryngectomy. The results are compared with those obtained in a healthy vocal speaker. The outcomes indicate that objective evaluations can provide a homogeneous database for a better interpretation of articulators and vocal dysfunctions.
, Yuant Tiandho, Rika Favoria Gusa, Muhammad Darussalam, Dwi Novitasari
Instrumentation Mesure Métrologie, Volume 20, pp 153-159; doi:10.18280/i2m.200305

Abstract:
Universitas Bangka Belitung is currently supplied by electricity from the State Electric Company in 690 kVA. Concerning utilizing renewable energy at Universitas Bangka Belitung, the solar power plant is an alternative energy source that will implement. Therefore it is necessary to design a solar power plant with a monitoring system to be known at any time the performance of the solar power plant. Monitoring is conducted in real-time via a website displaying several photovoltaic parameters, including voltage, current, humidity, temperature, and solar irradiation. From the measurement results obtained environmental parameters for temperature between 26°- 56.4°C, humidity 23.6% RH - 85.6% RH and solar irradiation 4.4 W/m2 - 1281.4 W/m2. The measured voltage of 11.41 - 18.95 volts with the rated current from the load used is 0.05 - 1.5 amperes.
Bouthaina Sayad, Djamel Alkama, Redha Rebhi, Ali Kidar, , Hijaz Ahmad, Younes Menni
Instrumentation Mesure Métrologie, Volume 20, pp 131-136; doi:10.18280/i2m.200302

, Ujjwal Mondal, Satish Chandra Bera
Instrumentation Mesure Métrologie, Volume 20, pp 143-151; doi:10.18280/i2m.200304

Abstract:
In the present paper, a modified obstruction free pressure sensor-based flow transducer has been developed using Hall sensors. This technique is a modified version of the earlier inductive method. In this transducer, the fluid pressure in the pipeline is taken as the flow sensing parameter, and various drawbacks of the earlier inductive technique are eliminated. A prototype unit of the transducer is developed and studied in the present work. The transducer consists of two identical C-type Bourdon gauges, each fitted with an identical permanent magnet and Hall sensor assembly to sense the fluid pressure under flow condition and static pressure under no flow condition. The difference between the two Hall sensor outputs is found to vary nonlinearly with flow rate. The mathematical relations describing the working of the prototype unit are derived in the paper. The static characteristic curves of the proposed flow transducer are determined experimentally and reported in the paper. The characteristic curves are found to follow the derived equations to a very good extent with negligible percentage deviation from best-fit nonlinear characteristic.
Anak Agung Ngurah Gunawan, Albert Sulaiman, Anak Agung Ngurah Franky Kusumanegara, Mada Ramadan, Mulana Ramadan
Instrumentation Mesure Métrologie, Volume 20, pp 167-171; doi:10.18280/i2m.200307

Abstract:
It was argued that human energy consists of physical energy that related to metabolism in the human body and the invisible part represented by the human energy field (HEF). This energy can be generated by a person by using a special excercise. In term of Indian metaphysical theories this energy is called “Chakras” which represents an integrated energy centers. The paper investigates the measurement the Chakra energy by looking at the effect of this energy on the molecular structure of mineral water. The experiment is carried out by providing Chakra energy generated by varying Jurus to a water sample and measured in FTIR. The existence of Chakra energy then analyzed by its effect on the spectrum. The results show that Fourier transform infrared spectroscopy (FTIR) spectra of the mineral water has given Chakra energy have transmitance lower than normal mineral water. The Chakra energy reduce the transmittance but the majority of them does not change a pattern or shift the top of the spectrum. The explicit energy of molecular vibration will be studied by using the Fourier decomposition. This shows that a weakening of molecular vibration occurs to the higher Jurus with a decline in the amplitude of vibration almost half or less.
Osama Mohammed, , Alaa A. Shanef
Instrumentation Mesure Métrologie, Volume 20, pp 173-177; doi:10.18280/i2m.200308

Abstract:
The nuclear track detector CR-39 is used in the detection of radon gas concentration in selected samples of cosmetics in the local market. Products of wide use are selected and employed in the current study. Six types of cosmetic products of different origins are tested by taking equivalent quantities of these products and putting them in plastic boxes. The detector is left with the samples for a period of 50 days. In addition to measuring the rate of surface evaporation of radon gas, measurements of the annual equivalent dose of radon gas are also carried out. The results show that the highest concentration of radon gas is in Charcoal Facial SCRuB (American origin) and it is equal to 0.0795 Bq/m3, whereas the lowest one in "bb" cream basis (5 in 1) is equal to 0.0355 Bq/m3. Based on specific international organizations and agencies, the concentration of radon in the samples under consideration is within the acceptable limits.
Asma Mesmoudi, Samira Mesmoudi, Zakarya Houari, Khelifa Mostefa
Instrumentation Mesure Métrologie, Volume 20, pp 161-166; doi:10.18280/i2m.200306

Abstract:
Wireless sensor networks have recently gained a lot of attention from the scientific community due to their very wide spectrum of applications. In such networks, the sensor nodes have limited resources. These constraints impose many challenges to the design of related protocols. Especially, routing protocols should be energy-efficient for the prolonged network lifetime. The LEACH protocol is the most popular energy-efficient hierarchical clustering protocol for WSNs that was proposed for reducing power consumption. However, LEACH suffers from several drawbacks such as the non uniform distribution of Cluster Head nodes, the possibility of choosing a low energy node as Cluster Head, etc. In this paper, an attempt is made to overcome this shortcoming by introducing a new hierarchical clustering protocol, called SCHP (Static Cluster-based Hierarchical Protocol). The SCHP protocol is based on a static cluster creation and an optimal cluster head selection. Simulation results show that the proposal guarantees better performance than the LEACH Protocol that is considered as the baseline in the literature. We used many metrics, as packet loss rate, end-to-end delay, and energy consumption to evaluate the efficiency of our proposal. We show also that the SCHP protocol can improve the network lifetime.
Ahmed Benali, Bellaouar Abderrahmane, , Hadef Redjem
Instrumentation Mesure Métrologie, Volume 20, pp 101-106; doi:10.18280/i2m.200206

Abstract:
This work is devoted to the comparative study for the formation and dissociation of nitrogen oxides by the numerical simulation of turbulent combustion without premix in a combustion chamber having a cylindrical shape with two coaxial jets, two flames using the ANSYS fluent software16.0. The study focuses on the influence of the type of fuel on the composition of discharges in content with NOx, that is to say two cases are treated and compared. Turbulence is modeled by the k-ε model and the chemical aspect of combustion is treated by the PDF model for each flame. The calculation results relate to the characteristics of dynamic fields, temperature, the mass fractions of different species involved in the combustion process and the NOx prediction. The effect of the swirl is also tested in this study with a CFD prediction of non premixed swirling g flame. These results are compared with measurements and confrontations is satisfactory.
Anouaressadate Aouf, Tarik Bouchala, , Bachir Abdelhadi
Instrumentation Mesure Métrologie, Volume 20, pp 65-72; doi:10.18280/i2m.200201

Abstract:
In this paper, we have carried out an experimental study of the detection of top rail surface cracks. Firstly, we have highlighted the inability to inspect the entire rail head surface by a single sensor with a single scan. To overcome this inspection inability, we have proposed a multisensor system composed of three differential probes arranged within a specific configuration. The yielded results showed the efficiency and the robustness of the proposed configuration in the detection of cracks regardless its size, orientation and location.
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