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Balkiss Abdelmoula, Ahmed Rebai, Nouha Bouayed Abdelmoula, Imed Gargouri
An overview of academic studies on cancer and environmental exposures on Sfax population

While facing a rapidly increasing urbanization in parallel with its growing economy, the Tunisian city of Sfax knew an important change in the way of life of its population. This demographic transition was followed by an epidemiological transition characterized by the net decline of communicable diseases and the emergence of non-communicable diseases, particularly cancers. However, there are no efficient data collection and evaluation systems established so far except the cancer registry of the south which has been last updated in 2006. Besides, the link between environmental exposures and the different types of cancer has not so far been thoroughly established among the population of the city of Sfax where the public concerns about the pollution is still rising. Therefore, this research comes to provide a synthetic overview and a critical analysis of available academic studies (MD thesis, masters’ projects, PhD dissertations…) conducted around cancer and environmental exposures on the population of the city Sfax throughout the last four decades (1974-2019) especially that cancer data is the cornerstone of cancer control.

Ayda Bouhamed, Rajarajan Ramalingame, Olfa Kanoun
Polymer/CNTs Nanocomposite for Water Level Monitoring in IoT Mobile Agriculture Application

In this paper, an IoT and mobile based smart water level controlling system has been implemented to send alert notification message to the farmers and to deliver anytime information about the water level in order to fill the tank with the necessary water. This system allows continuous pouring of the required amount of water to crops, provides continuous control from overflowing and avoids lack of water in the tank, which can cause the damaging of the pump. To this aim, WeMos D1 mini was used to determine the water level inside a container based on data received from the connected polymer/CNTs nanocomposite sensor. The use of the nanocomposite sensor and WeMos D1 mini provide us a compact, cost effective and highly precise controlling system having very low energy consumption.

Amir Hammami
IoT Real-Time Remote Environment Monitoring System

In this research paper, we propose a computer system whose main objective is to connect different sensors to a web server containing a database. The monitoring system can help to view in real time environment data like temperature and humidity. By using sensor connected to the Raspberry Pi Minicomputer which stores them on remote server and makes them available to Internet users. Collected environment data are sent to ThingSpeak web server using simple Internet connection. A supervisor through a dashboard monitors various data. The system can help to resolve emergencies. In this way, it simultaneously improves the quality of the environment through constant attention. This project enters in the concept of Internet of Things which consists of integrating the real-world into the Internet.

Amira Ghezal, Ammar Al-Hamry, Leonardo G. Paterno, Mounir Ben Ali, Olfa Kanoun
Performance Optimization of Electrochemical Sensor based on Iron Oxide-reduced Graphene Oxide Nanocomposite: Application for Environmental Monitoring

In this work, an electrochemical sensor based on iron oxide-reduced graphene oxide nanococmposite modified screen printed graphite electrode (Fe3O4-rGO/SPGE) has been developed for selective detection of nitrite ions in drinking water using differential pulse voltammetry (DPV). The proposed nitrite electrochemical sensor exhibited a relative standard deviation of 4.37% for three replicate analysis of 10-3 M L-1 NO2. In addition, it displays high electrochemical stability for nitrite oxidation over the pH 6.5, high sensitivity and low limit of detection of 1.2 x 10-5 M L-1 with good selectivity in the concentration range 10-4 - 10-3 which is the range where the rate of nitrite is maximum. These results prove that the metal oxide-rGO nanocomposite modified SPGE has good applications for the determination of nitrite in water.

Ahmed Gaddour, Wael Dghais, Belgacem Hamdi, Mounir Ben Ali
Development of new conditioning circuit for ISFET sensor

It is commonly known that most readout circuits of the pH-ISFET, with temperature cancelation, were designed using MOSFET working in strong regime. Nevertheless, a classes of circuits elaborated with respect to MOSFET operating in weak inversion and moderate regime are also suitable for low-power systems such as ISFET sensor array for DNA detection. In this work a new integrated interface circuit that can perform a great temperature compensation to enhance stability of the readout circuit operating in weak inversion for ISFET was developed. At first, the experimental results agree with the ISFET macro model in wide range of pH with a sensitivity about of 54 mV/pH. Second, we investigated the ISFET response for a wide temperature range from -20 °C to 150 °C. After that we propose a new conditioning circuit operating in weak inversion regime, the simulation result prove that the design technique permits to enhance the temperature insensitivity (about of 13 × 10-6 V/°C) and a power consumption in order of 49 µW.

Risto Kuoppamäki
The Accuracy of Open Channel Flow Measurements in Industry

Open channel flow measurements are largely used in the process industry to measure waste water discharge. Most measurements use open channel venturi or weir as the measuring device. Demands for sound measurement accuracy from process control, environmental quality systems and environmental protection authorities are constantly increasing.
Indmeas has for years been engaged in quality maintenance of the waste water flow measurements of the Finnish process industry. The basis of quality maintenance is repeated field calibrations. The reference value for an open channel flow is determined by using a radioactive tracer and the dilution method. The quality assurance of the method is obtained in the field by regular comparisons against the accredited transit time tracer method. The calibration results, altogether more than 700, give a representative picture of the accuracy of noncalibrated open channel flow measurement positions, on the critical parts of the measurement chains and on the accuracy level that can be reached by reasonable efforts.
The most critical part in the open channel measurement chain is the water level measurement that is most often carried out by using either a pressure or an ultra sound measurement. Both have their own operational limits and maintenance problems. Measurement stability may also be disturbed by sludge sedimentation on the channel bottom. Other uncertainty components are most often constant with time and can therefore be removed by a field calibration.
Experience has shown that a measurement uncertainty level of ± 5 % can be reached in a fairly straightforward manner by using field calibrations.

Pan Hao,Xu Xiqing, Cheng Xianmei, Ma Fengcheng
Testing Standard Sample Calibrating Device Developing of Entire Diameter Rock Gas Permeability and Its Calibrating Technique to Value Tracing to Source

Rock gas permeability is one of the most important foundation parameters during exploration and development of oil/gas fields. At present, only Ø 25 mm × 25 mm rock gas permeability testing standard material is produced and calibrated in China, the value tracing to the source and device calibration of other specification rock permeability devices are dependent on overseas, which seriously restricts the development of rock physical property testing technique. On the basis of deep analysis to calibrating technique of rock permeability testing device, this paper introduces the entire diameter rock permeability testing standard sample calibrating device from our own design and its calibrating technique to value tracing to source, which is a great breakthrough to calibrate big diameter rock gas permeability of various specifications using small diameter standard sample in China. The rock permeability calibrating device introduced in the paper granted the patent of invention in China, its calibrating method has been applied for the patent

Guo Xuming, Duan Jiqin, Ni Rui, Dong Shouping
Research for the Flow Profile In the Natural Gas Pipelines by Means of PIV

The flow profile in the natural gas pipelines can be measured by means of the Particle Image Velocimetry (PIV) to research effects of typical flow profile on gas flow measurement accuracy. Then the measurement accuracy can be improved by compensation. But there is rarely public report about this kind of examples up to know. In this case of test, safety is very important, for example, zero leaking and explosion prevent should be take account. In this paper the PIV system is introduced in detail. The unique design and production of a visual pipeline-section, a positive pressure ventilating room and a high-pressure particle inject device are introduced. Meanwhile the software of PIV system also was represented including some special image processing algorithms and Topological Graph Theory Algorithms.

Zhang Hongpeng, Sun Deping, Sun yuqing
A Novel Flow Sensor in Hydraulic System

This paper presents a built-in flow sensor for hydraulic system use. Unlike traditional counter parts, a MEMS (MicroElectroMechanical Systems) differential pressure-sensing element and a low-cost throttle are integrated together in this sensor. It is of better spatial resolution and cause fewer losses than the widely used orifice flow meter. By theoretical analysis and experimental tests, we have achieved an optimized design strategy.

Yang Mingjie, Qi Jing-sun, Jiang Bin, Luo Xing-ren
Gas Flow Quantity Measuring Technique to Rock Permeability Using Throttling Capillary P-0 Regression

This paper introduces the technical status of rock permeability measuring technique to gas flow quantity measurement at home and abroad. Aiming to the problems of rock gas permeability measurement in the exploration and development process of oil/gas reservoir of low permeability, a set of automatic measuring device of throttling capillary gas flow quantity was developed, the throttling capillary P(Pressure)-Q(Quantity) regression measuring approach of rock permeability was set up. The approach, which is fast to measuring speed of the gas passing through rock, high to measuring accuracy, and high to automatizing degree, is a great breakthrough to measuring technique of rock gas permeability. The throttling capillary gas flow measuring device introduced in the paper granted the patent of invention in China, the patent No.is ZL-01278258.0.

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