Fabrication and Characterization of Ion-Doped p-Type Nanocrystalline Silicon Thin-Film Transistors

Yassine Djeridane,Pere Roca i Cabarrocas,김가현,김세환,배정호,정준영,장진 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.1

We report on the fabrication of coplanar p-channel nanocrystalline silicon thin-film transistors (nc-Si TFT) by using conventional boron ion doping. p-channel TFTs are necessary to implement complementary metal-oxide-semiconductor (CMOS) circuits with low power consumption, but amorphous silicon and polycrystalline silicon p-channel TFTs both have drawbacks, such as low hole mobility, high cost and poor uniformity. On the other hand, nanocrystalline silicon shows many merits, encouraging its use in CMOS circuits such as reasonable carrier mobility, high uniformity and ease of processing, despite these advantages, very few studies of p-type nanocrystalline silicon TFTs have been performed and there have been no documented efforts to adopt an ion-doped coplanar structure or to optimize its fabrication process. The TFTs presented herein have been fabricated using a conventional ion-doping process and show reasonably optimized characteristics, so the result demonstrated in this paper can be immediately adopted in a large-area, industrial system with little adjustment. Moreover, it is quite a new concept to use nanocrystalline silicon thin films for coplanar p-channel TFTs. The nanocrystalline silicon thin-films used in this work were grown on glass substrates at a low substrate temperature of 200 ℃ by using a SiF<SUB>4</SUB>/H<SUB>2</SUB>/Ar mixture. The TFTs that resulted from these films exhibited a field-effect mobility of 1.52 cm<SUP>2</SUP>/Vs, a gate voltage swing of 1.1 V/dec, an on/off ratio in excess of 10<SUP>6</SUP> and a threshold voltage of −6.28 V.

Human Papillomavirus Genotyping and p16INK4a Expression in Cervical Lesions: A Combined Test to Avoid Cervical Cancer Progression

Yassine Zouheir,Taoufiq Fechtali,Nadia Elgnaoui 대한암예방학회 2016 Journal of cancer prevention Vol.21 No.2

Cervical cancer is a major public health problem in Morocco. The cervical cancer has a long precancerous period that provides an opportunity for the screening and treatment. Improving screening tests is a priority goal for the early diagnosis of cervical cancer. This study was conducted to evaluate the combination of p16INK4a protein expression, human papillomavirus (HPV) typing, and histopathology for the identification of cervical lesions with high risk to progress to cervical cancer among Moroccan women. A total of 96 cervical biopsies were included in this study. Signal amplification in situ hybridization with biotinylated probes was used to detect HPV. Immunohistochemistry was used to evaluate the expression of p16INK4a protein. HPV DNA was detected in 74.0% of the biopsies (71/96). Of the seventy-one positive HPV cases, we detected 67.6% (48/71) of high risk (HR)-HPV (HPV 16 and 18), 24% of low risk-HPV (HPV 6 and 11), 1.4% intermediate risk-HPV (HPV 31, 33, and 35), and 7% coinfections (HPV 6/11 and 16/18). Overexpression of p16INK4a protein was observed in 72.9% (70/96) of the biopsies. In addition, p16INK4a protein detection was closely correlated with recovery of HR HPV. Our result showed that p16INK4a expression level is correlated with HR-HPV status. (J Cancer Prev 2016;21:121-125)

An improved 1-D thermal model of parabolic trough receivers: Consideration of pressure drop and kinetic energy loss effects

Yassine Demagh Techno-Press 2022 Advances in energy research Vol.8 No.1

In this study, the first law of thermodynamics was used to establish a one-dimensional (1-D) thermal model for parabolic trough receiver (PTR) taking into account the pressure drop and kinetic energy loss effects of the heat transfer fluid (HTF) flowing inside the absorber tube. The validation of the thermal model with data from the SEGS-LS2 solar collector-test showed a good agreement, which is consistent with the previously established models for the conventional straight and smooth (CSS) receiver where the effects of pressure drop and kinetic energy loss were neglected. Based on the developed model and code, a comparative study of the newly designed parabolic trough S-curved receiver versus the CSS receiver was conducted and solar unit's performances were analyzed. Without any supplementary devices, the S-curved receiver enhances the performance of the parabolic trough module, with a maximum of 0.16% compared to CSS receiver with the same sizes and mass flow rates. Thermal losses were reduced by 7% due to the decrease in the temperature of the outer surface of the receiver tube. In addition, it has been shown that from a mass flow rate of 9.5 kg/s the heat losses of the S-curved receiver remain unchanged despite the improvement in the heat transfer rate.

Friction and wear performance of disc brake pads and pyroelectric energy harvesting

Yassine Tabbai,Amine Alaoui-Belghiti,Reddad El Moznine,Fouad Belhora,Abdelowahed Hajjaji,Abdessamad El Ballouti 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.8 No.2

Due to the perpetual development of new technologies in the transportation industry, vehicles become more powerful and faster. As a result, the braking systems have to simultaneous follow this same rate of progression. The brake, a major safety organ, gets significant interest of engineers and researchers. The main purpose of this paper is to present a study based on numerical modelling coupling the thermodynamic and the thermoelectrical behaviours of an automobile brake disc for the prediction of the wear of disc brake pads and the time to be changed, as well as the harvesting of the thermal energy resulting from the braking operation. Firstly, an analysis of the thermal phenomena operating in a brake disc in service (heat fl ow generated by friction, high thermal gradients, temperature rise, and the speed of rotation of the disc) is presented. The proposed modelling is carried out taking into account the influence of different parameters such as the type of braking, the cooling mode, and the design materials. Then, the studies are focused on the use of a smart material for heat recovery due to the contact between the disc and the pads, this material has a capability of converting thermal energy into exploitable electric energy, as a consequence, we can predict the state of health and proper time to change the pads. This study is based on the pyroelectric effect, for a good prediction of the proper time to change the pads. The magnitudes of the voltage generated and the energy density harvested are shown as a function of the pads thicknesses, the speed and the temperature traversed by the pyroelectric material PZT.

New Condition of Stabilisation for Continuous Takagi-Sugeno Fuzzy System based on Fuzzy Lyapunov Function

Yassine Manai,Mohamed Benrejeb 보안공학연구지원센터(IJCA) 2011 International Journal of Control and Automation Vol.4 No.2

Recognition of Handwritten Mathematical Text

Yassine Chajri,Belaid Bouikhalene 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.8

The recognition of handwritten mathematical documents is a very important field which is interested in identifying the text, graphics or notations and in extracting information. In this paper the focus will be on the handwritten mathematical text recognition and we are going to present all the necessary steps in our system (preprocessing, text lines segmentation, mathematical symbols segmentation and symbols recognition).

CIM to PIM Transformation in MDA : from Service-Oriented Business Models to Web-Based Design Models

Yassine Rhazali,Youssef Hadi,Abdelaziz Mouloudi 보안공학연구지원센터 2016 International Journal of Software Engineering and Vol.10 No.4

Models transformation is the main key of MDA. The first transformation in MDA is CIM to PIM transformation, the second is PIM to PSM transformation. Most searches deal the transformation from PIM level to PSM level, since there are multiple common points between these two levels. However, the transformation from CIM level to PIM level is rarely addressed in search subjects because they are two distinct levels. Our objective in this paper is to represent an approach that allows controlling transformation from CIM level to PIM level in accordance with the MDA approach. More precisely, we propose a methodology for transforming service-oriented business models, to web-based design models. Despite the importance of service-oriented models and web-based models, the transformation between them is not addressed in MDA researches. Our methodology is based on creating a good CIM models service-oriented, through construction rules, to facilitate transformation towards PIM models web-based. Next, our transformation rules allow a semi-automatic transformation from CIM to PIM. Our approach conforms to MDA recommendations, because it allows considering the business dimension in the CIM level, and it allows modeling this latter level by using SoaML, the OMG standard for modeling services. However, we based on UML 2 to model PIM level, because UML is advocated by MDA in PIM level. Our proposal results a set of web-based design models from service-oriented business models, through semi-automatic transformation in accordance with MDA approach.

Handwritten Mathematical Expressions Recognition

Yassine Chajri,Belaid Bouikhalene 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.5

In this paper, we will present a dataset of handwritten mathematical expressions outcome of several mathematical disciplines (logic, analysis, algebra and probability). This paper also describes all the details concerning the necessary steps of our approach for handwritten mathematical expressions recognition. At the end of this paper, we will present all the results obtained by this system.

Parkinson’s Kinetigraph in the Selection of Levodopa-Carbidopa Intestinal Gel for Motor Fluctuations Refractory to Deep Brain Stimulation

Yassine Noui,Monty Adam Silverdale,Julian Evans,Lucy Partington-Smith,Christopher Kobylecki 대한파킨슨병및이상운동질환학회 2021 Journal Of Movement Disorders Vol.14 No.3

Despite rigorous selection and programming, some patients with Parkinson’s disease (PD) may not respond optimally to deep brain stimulation (DBS). Some evidence supports the joint use of DBS and other therapies, such as levodopa-carbidopa intestinal gel (LCIG). There is increasing interest in the use of wearable technologies in selecting patients for advanced therapies. Here, we present a patient with ongoing poorly controlled symptoms following DBS for whom the selection and titration of adjunctive LCIG was facilitated by the use of wearable technology.

Screening and selection of autochthonous fungi from leachate contaminated-soil for bioremediation of different types of leachate

Yassine Zegzouti,Aziz Boutafda,Loubna El Fels,Miloud El Hadek,Fatou Ndoye,Nalla Mbaye,Lamfeddal Kouisni,Mohamed Hafidi 대한환경공학회 2020 Environmental Engineering Research Vol.25 No.5

This study aims to use contaminated soil with leachate to select autochthonous fungi that are able to bioremediate three types of leachate, (Young (YL), Intermediate (IL) and Old (OL)). Eleven fungal species were isolated via the enrichment method using the leachate as the sole source of carbon and energy. The isolates were evaluated for their ability to grow and remove organic pollutants at 100%, 50% and 25% (v/v) of leachate in both solid and liquid cultures that were spiked with malt extract. The results indicated that only three fungi, Aspergillus flavus (A. flavus-LC106118), Aspergillus niger (A. niger-KT192262) and Fusarium solani (F. solani-KX349467) showed significantly high capacity to grow on leachate, with maximum radial growth rates (Gr) of 7.5 ㎜, 4.7 ㎜, and 5.3 ㎜, respectively. In addition, 34%, 22%, and 27%, respectively of COD removal rates were obtained at 25% concentration in YL. A. flavus was the most tolerant fungus against landfill leachate, followed by F. solani, and finally A. niger. Therefore, these three fungi are good candidates for leachate bioremediation. However, for a better remediation, the combined effects of different types of fungi and leachates on the fungal growth need to be considered during the fungi selection.