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SMART PORTABLE CRYOTHERAPY SYSTEM INVOLVING CONTROLLED THERMOELECTRIC COOLING MODULES FOR MEDICAL APPLICATIONS
No full textWhen a person suffers from an injury, there are specific methods of treatment which are recommended according to the type of injury. One of these methods involves Cryotherapy, in which the part of the affected body is exposed to cooling for decreasing the temperature. The aim of this therapeutic method is to decrease cellular metabolism, increase cellular survival, decrease inflammation and reduce pain and spasm. The system designed in the present study involves the possibility of “smart†treatment using portable thermoelectric cooling devices based on electronic hardware, software and digital control techniques. In the proposed system, all stages of treatment have been performed automatically by using Arduino as the microcontroller to controlling temperature in cryotherapy methods. This research focus on usage of thermoelectric effect with Peltier module for smart electronic cooling and does not involve the usage of chemicals or cooling materials e.g. ice. Smart cooling methods have significant advantages that they are highly accurate and allow precise timing of the treatment especially for the athletes, and for whom the recovery time from injuries is critical. This approach can be fundamentally important for practical investigations relating to the timing of cryotherapy for any type of users. ABSTRAK: Apabila seseorang mengalami kecederaan, terdapat kaedah rawatan khas yang disyorkan berdasarkan jenis kecederaan. Salah satu kaedah ini melibatkan Krioterapi, di mana sebahagian kawasan badan yang terlibat didedahkan kepada kesejukan untuk megurangkan suhu badan. Tujuan kaedah terapeutik ini adalah bagi mengurangkan metabolisme sel, menambah sel selamat, mengurangkan radang dan mengurangkan sakit dan sentakan. Sistem yang direka dalam kajian ini berkemungkinan melibatkan rawatan bijak yang menggunakan alat penyejuk termoelektrik mudah alih melibatkan peranti elektronik, perisian dan teknik kawalan digital. Dalam sistem cadangan ini, kesemua peringkat rawatan telah dilaksanakan secara automatik menggunakan Arduino sebagai alat mikro-kawalan bagi mengawal suhu dalam kaedah Krioterapi. Fokus kajian ini adalah dengan menggunakan kesan termo-elektrik dengan modul Peltier untuk penyejuk elektronik bijak dan tidak melibatkan penggunaan bahan kimia dan bahan penyejuk seperti ais. Kaedah penyejuk bijak ini mempunyai faedah ketara seperti sangat tepat dan memberi masa rawatan yang jitu terutama untuk atlet, dan kepada sesiapa yang tempoh masa pemulihan kecederaan amat penting untuknya. Pendekatan ini boleh menjadi asas penting bagi penyelidikan praktikal berkaitan masa krioterapi untuk pelbagai jenis pengguna
A NEW SPECTRUM AND ENERGY AWARE ROUTING PROTOCOL IN COGNITIVE RADIO SENSOR NETWORK
Get PDFABSTRACT: Cognitive radio sensor network (CRSN) is a new generation of communication systems that wants to solve the overcrowded spectrum utilization of the unlicensed bands. It has combined sensor networks and cognitive radio technology, so it has the challenges of energy restriction of sensors and also dynamic spectrum access of the cognitive radio network. On the other hand, considering both of these challenges in the routing protocol plays a basic role in network performance and we can’t apply the routing protocols that have been proposed for wireless sensor networks and cognitive radio networks, separately, in the CRSN. Therefore, this article has tried to provide a new spectrum and energy-aware routing protocol in which the source is able to choose the most stable route in the aspect of node residual energy or spectrum access probability. Not only can considering the nodal residual energy and spectrum access in the route discovery process avoid repetitive link failure, but it also can increase the network lifetime. This protocol has been compared with ESAC, SCR, ERP, and SER. The result of this comparison has shown that our protocol reduces end-to-end delay, control overhead, throughput, and lifetime in comparison to other protocols, especially in small-scale networks.
ABSTRAK: Rangkaian sensor radio kognitif (CRSN) adalah generasi baru sistem telekomunikasi bagi menyelesaikan masalah kesesakan pada pemakaian band spektrum tidak berlesen. Ianya adalah kombinasi rangkaian sensor dan teknologi radio kognitif. Oleh itu, ia mempunyai cabaran sekatan tenaga pada sensor dan kemasukan spektrum secara dinamik pada rangkaian radio kognitif. Pada masa sama, dengan mengambil kira kedua-dua cabaran pada protokol rangkaian ini telah memainkan peranan asas pada prestasi rangkaian dan kami tidak boleh mengguna pakai protokol rangkaian yang telah diguna pakai pada rangkaian sensor tanpa wayar dan rangkaian radio kognitif secara asing dalam CRSN. Oleh itu, artikel ini cuba menyediakan spektrum baru dan pengawasan tenaga pada protokol rangkaian, di mana sumber boleh memilih laluan rangkaian yang stabil dengan mengambil kira pada aspek baki tenaga nod atau kebarangkalian akses spektrum. Selain itu, ianya dapat mengelakkan kegagalan laluan berulang juga menambahkan jangka hayat rangkaian. Protokol ini telah dibandingkan dengan ESAC, SCR, ERP dan SER. Perbandingan keputusan menunjukkan protokol ini mengurangkan kelewatan hujung-ke-hujung, mengawal kesesakan, mambaiki jumlah penghantaran dan menambah tempoh hayat berbanding protokol lain, khususnya pada rangkaian skala kecil
RECENT TRENDS IN DENGUE DETECTION METHODS USING BIOSENSORS
Get PDFABSTRACT: Dengue illness is an infectious tropical disease, transmitted by Aedes mosquitos, that poses a serious health threat to the tropical world. This disease causes widespread infection worldwide, with about 50 million cases of dengue occurring per annum out of which 500,000 recorded cases of dengue hemorrhagic fever and 22,000 deaths. Currently, there are no effective vaccines available to prevent the spread of the infection. Accurate and rapid laboratory diagnostic tests are required for early detection to reduce patient mortality rate. In this paper, common laboratory diagnosis methods for detecting dengue virus infection are discussed. Currently, virus isolation, RT-PCR and serology methods provide the most direct and accurate response for detection of dengue. However, these methods require tedious steps, expensive requirements and expert staffs. Recent research have proposed the usage of biosensors as an alternative new technology for detection of dengue. In this work, various types of biosensors such as electrochemical, piezoelectric, and optical biosensor have been described and compared to evaluate their effectiveness in dengue detection. It is observed that the optical biosensor offers the best detection due to its high sensitivity as compared to others, although it is popularly known as an expensive method. Alternatively, the use of electrochemical and piezoelectric biosensors (QCM) is highly recommended for detection of dengue due to their ease-of-use, low cost, low reagent consumption, disposability, and minimal sample preparation. These approaches have the potential to improve the rate of survival, particularly in resource-limited countries.
ABSTRAK: Virus denggi adalah penyakit berjangkit tropika bawaan nyamuk Aedes yang menimbulkan ancaman serius kepada kesihatan global. Penyakit ini menyebabkan jangkitan yang meluas di seluruh dunia, dengan kira-kira 50 juta kes denggi yang berlaku setiap tahun di mana 500,000 kes demam denggi berdarah dan 22,000 kematian direkodkan. Buat masa ini, tiada vaksin yang berkesan untuk mencegah penyebaran jangkitan ini. Ujian diagnostik makmal yang cepat dan tepat diperlukan untuk pengesanan denggi awal untuk mengurangkan kadar kematian pesakit. Dalam artikel ini, kaedah diagnosis makmal yang biasa dilakukan untuk mengesahkan jangkitan virus denggi akan dibincangkan. Pada masa kini, kaedah pengasingan virus, RT-PCR dan serologi adalah tindak balas yang paling cepat dan tepat untuk mengesan denggi. Walau bagaimanapun, kaedah-kaedah ini memerlukan langkah-langkah yang melecehkan, kos penyelenggaraan yang tinggi dan kakitangan yang terlatih. Penyelidikan terkini telah mencadangkan penggunaan biosensor sebagai teknologi baru alternatif untuk mengesan denggi. Dalam artikel ini juga pelbagai jenis biosensor seperti biosensor elektrokimia, piezoelektrik, dan biosensor optik telah dijelaskan dan dibandingkan untuk menilai keberkesanannya dalam pengesanan denggi. Difahamkan bahawa biosensor optik menawarkan pengesanan terbaik kerana kepekaannya yang tinggi berbanding dengan yang lain, walaupun ia dikenali sebagai kaedah berkos tinggi. Sebaliknya, biosensor elektrokimia dan piezoelektrik (QCM) sangat disyorkan untuk mengesan denggi kerana ia mudah digunakan, berkos rendah, penggunaan bahan uji yang terhad, boleh dipakai buang, dan mempunyai penyediaan sampel yang minima. Pendekatan-pendekatan ini berpotensi untuk meningkatkan kadar kemandirian di kawasan-kawasan sumber terhad
NUMERICAL ANALYSIS OF TUNNEL LED LIGHTING MAINTENANCE FACTOR
Get PDFABSTRACT: It is necessary to periodically maintain lighting equipment in accordance with international standards. Contamination of lamps caused by long-term use of lighting equipment will result in loss of Luminous Flux and optical losses. The decrease in lighting performance poses a visual difficulty for drivers and causes accidents. In this study, the total Maintenance Factor is numerically examined by considering the losses of diffuser and lens for LED lamps used in tunnel lighting. The variation of luminaries performance with years considering Maintenance Factors as regards environmental conditions and features of the luminaries is evaluated to demonstrate the importance of tunnel lighting maintenance. Moreover, to show the importance of LED lamps Maintenance Factor, the variation of illumination levels of LED lamps is analysed under different Maintenance Factors. It is observed that enhancing Maintenance Factor would contribute to energy efficiency.
ABSTRAK: Penjagaan peralatan cahaya secara berkala mengikut piawai kebangsaan adalah amat penting. Pencemaran lampu disebabkan penggunaan peralatan cahaya pada jangka panjang akan menyebabkan kehilangan kilauan kerdipan lampu dan optik. Pengurangan pencahayaan ini menyebabkan kesukaran pandangan pada pemandu dan menyebabkan kemalangan jiwa. Kajian ini mengkaji tentang jumlah Faktor Penjagaan secara numerik dengan mengambil kira pengurangan difuser dan kanta pada lampu LED yang digunakan dalam terowong pencahayaan. Faktor Penjagaan pada perubahan kilauan berdasarkan tahun mengambil kira keadaan sekeliling dan ciri khas kilauan. Tambahan, ini dinilai bagi menunjukkan kepentingan penjagaan terowong pencahayaan dan kepentingan Faktor Penjagaan Lampu LED. Perubahan pada tahap terang pada lampu LED dikaji dengan mengambil kira Faktor Penjagaan. Peningkatan pada Faktor Penjagaan telah didapati dapat menjimatkan tenaga
Editorial
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IIUM ENGINEERING JOURNAL
ISSN: 1511-788X E-ISSN: 2289-7860 Volume 19, Issue 2, December 2018 https://doi.org/10.31436/iiumej.v19i2
CHIEF EDITOR
Ahmad Faris Ismail, IIUM, Malaysia
TECHNICAL EDITOR
Erry Yulian Triblas Adesta, IIUM, Malaysia
EXECUTIVE EDITOR
AHM Zahirul Alam, IIUM, Malaysia
ASSOCIATE EDITOR
Anis Nurashikin Nordin, IIUM, Malaysia
LANGUAGE EDITOR
Lynn Mason, Malaysia
COPY EDITOR
Hamzah Mohd. Salleh, IIUM, Malaysia
EDITORIAL BOARD MEMBERS
Abdullah Al-Mamun, IIUM, Malaysia
Abdumalik Rakhimov, IIUM, Malaysia
Amir Akramin Shafie, IIUM, Malaysia
Erwin Sulaeman, IIUM, Malaysia
Hanafy Omar, Saudi Arabia
Hazleen Anuar, IIUM, Malaysia
Konstantin Khanin, University of Toronto, Canada
Ma'an Al-Khatib, IIUM, Malaysia
Md Zahangir Alam, IIUM, Malaysia
Meftah Hrairi, IIUM, Malaysia
Mohamed B. Trabia, United States
Mohammad S. Alam, Texas A&M University-Kingsville, United States
Muataz Hazza Faizi Al Hazza, IIUM, Malaysia
Mustafizur Rahman, National University Singapore, Singapore
Nor Farahidah Binti Za'bah, IIUM, Malaysia
Ossama Abdulkhalik, Michigan Technological University, United States
Rosminazuin AB. Rahim, IIUM, Malaysia
Waqar Asrar, IIUM, Malaysia
INTERNATIONAL ADVISORY COMMITTEE
A. Anwar, United States
Abdul Latif Bin Ahmad, Malaysia
Farzad Ismail, USM, Pulau Pinang, Malaysia Hanafy
Omar, Saudi Arabia
Hany Ammar, United States
Idris Mohammed Bugaje, Nigeria
K.B. Ramachandran, India Kunzu Abdella, Canada
Luis Le Moyne, ISAT, University of Burgundy, France
M Mujtaba, United Kingdom
Mohamed AI-Rubei, Ireland Mohamed B Trabia, United States
Mohammad S. Alam, Texas A&M University-Kingsville, United States
Nazmul Karim
Ossama Abdulkhalik, Michigan Technological University, United States
Razi Nalim, IUPUI, Indianapolis, Indiana, United States
Syed Kamrul Islam, United States
Tibor Czigany, Budapest University of Technology and Economics, Hungary
Yiu-Wing Mai, The University of Sydney, Australia.
AIMS & SCOPE OF IIUMENGINEERING JOURNAL
The IIUM Engineering Journal, published biannually, is a carefully refereed international publication of International Islamic University Malaysia (IIUM). Contributions of high technical merit within the span of engineering disciplines; covering the main areas of engineering: Electrical and Computer Engineering; Mechanical and Manufacturing Engineering; Automation and Mechatronics Engineering; Material and Chemical Engineering; Environmental and Civil Engineering; Biotechnology and Bioengineering; Engineering Mathematics and Physics; and Computer Science and Information Technology are considered for publication in this journal. Contributions from other areas of Engineering and Applied Science are also welcomed. The IIUM Engineering Journal publishes contributions under Regular papers, Invited review papers, Short communications, Technical notes, and Letters to the editor (no page charge). Book reviews, reports of and/or call for papers of conferences, symposia and meetings, and advances in research equipment could also be published in IIUM Engineering Journal with minimum charges.
REFEREES’ NETWORK
All papers submitted to IIUM Engineering Journal will be subjected to a rigorous reviewing process through a worldwide network of specialized and competent referees. Each accepted paper should have at least two positive referees’ assessments.
SUBMISSION OF A MANUSCRIPT
A manuscript should be submitted online to the IIUM-Engineering Journal website: http://journals.iium.edu.my/ejournal. Further correspondence on the status of the paper could be done through the journal website and the e-mail addresses of the Executive Editor: [email protected] Faculty of Engineering, International Islamic University Malaysia (IIUM), Jan Gombak, 53100, Kuala Lumpur, Malaysia. Phone: (603) 6196 4529, Fax:(603) 6196 4488.
Table of Content
EDITORIAL............................................................................................... i
CHEMICAL AND BIOTECHNOLOGY ENGINEERING
CHLORELLA VULGARIS LOGISTIC GROWTH KINETICS MODEL IN HIGH CONCENTRATIONS OF AQUEOUS AMMONIA................... 1
Azlin Suhaida Azmi, Nurain Atikah Che Aziz, Noor Illi Mohamad Puad, Amanatuzzakiah Abdul Halim, Faridah Yusof, Suzana Yusup
SYNTHETIC ANTIMICROBIAL AGENT AND ANTIMICROBIAL FABRICS: PROGRESS AND CHALLENGES............. 10
Norashikin Binti Mat Zain, John Olabode Akindoyo, Mohammad Dalour Hossen Beg
CIVIL AND ENVIRONMENTAL ENGINEERING
PERFORMANCE OF HIGH STRENGTH LIGHTWEIGHT CONCRETE USING PALM WASTES................................... 30
Md. Nazmul Huda, Mohd Zamin Jumaat, Abul Bashar Mohammad Saiful Islam, Walid Abubaker Al-Kutti
ELECTRICAL, COMPUTER AND COMMUNICATIONS ENGINEERING
WIDE RANGE MODULATION INDEXES FEATURED CARRIER-BASED PWM STEPPED WAVEFORM FOR HALF- BRIDGE MODULAR MULTILEVEL CONVERTERS......................................................................................... 43
Majdee Tohtayong, Sheroz Khan, Mashkuri Yaacob, Siti Hajar Yusoff, Nur Shahida Midi, Musse Muhamud Ahmed
A NOVEL METHOD TO ESTIMATE ECONOMIC REPLACING TIME OF TRANSFORMER USING MONTE CARLO ALGORITHM AND ANN............................................................................................... 54
Mehdi Zareian Jahromi, M. Hossein Mehrabanjahromi, Mohsen Tajdinian, Mehdi Allahbakhshi
ADAPTIVE TRIMMED MEAN AUTOREGRESSIVE MODEL FOR REDUCTION OF POISSON NOISE IN SCINTIGRAPHIC IMAGES.......... 68
Khan Bahadar Khan, Muhammad Shahid, Hayat Ullah, Eid Rehman, Muhammad Mohsin Khan
EVALUATION OF THE W-METRIC ROUTING USING RPL PROTOCOL IN LLNS........................................................................ 80
Rosminazuin Ab Rahim, Abdallah M. Awwad, Aisha Hasan Abdalla, Aliza Aini Md Ralib INVESTIGATION ON NEED FOR SPECIFIC PROPAGATION MODEL FOR SPECIFIC ENVIRONMENT BASED ON DIFFERENT TERRAIN CHARACTERISTICS...................90
Jide Julius Popoola, Akinlolu Adediran Ponnle, Yekeen Olajide Olasoji, Samson Adenle Oyetunji
A STUDY ON LOW-COMPLEXITY TRANSMIT ANTENNA SELECTION FOR GENERALIZED SPATIAL
MODULATION.................................................................................. 105
Simeon Olumide Ajose, Adewale Akanbi Alafia, Agbotiname Lucky Imoize
A NEW SPECTRUM AND ENERGY AWARE ROUTING PROTOCOL IN COGNITIVE RADIO SENSOR NETWORK.............................. 118
Sara Moshtaghi, Sayyed Majid Mazinani
RECENT TRENDS IN DENGUE DETECTION METHODS USING BIOSENSORS................................................................................ 134
Ahmad Anwar Zainuddin, Anis Nurashikin Nordin, Rosminazuin Ab Rahim
NUMERICAL ANALYSIS OF TUNNEL LED LIGHTING MAINTENANCE FACTOR.......................................................................... 154
Mehmet Sait Cengiz, Çiğdem Cengiz
ENGINEERING MATHEMATICS AND APPLIED SCIENCE
ABOUT THE SILICON SENSITIVITY OF THE DEEP LEVEL WITH ALTERNATING PRESSURE................................... 164
Ikrom Gulamovich Tursunov, Abdurahim Abduraxmonovich Okhunov, Odiljon Oxundadaevich Mamatkarimov
THE HYDRODYNAMIC COEFFICIENTS FOR OSCILLATING 2D RECTANGULAR BOX USING WEAKLY COMPRESSIBLE SMOOTHED PARTICLE HYDRODYNAMICS (WCSPH) METHOD................................................................................. 172
Muhammad zahir ramli
AN ANALYTICAL TECHNIQUE TO OBTAIN HIGHER-ORDER APPROXIMATE PERIODS FOR THE NONLINEAR OSCILLATOR................... 182
Md Sazzad Hossien Chowdhury, Md. Alal Hosen, Mohammad Yeakub Ali, Ahmad Faris Ismail
MATERIALS AND MANUFACTURING ENGINEERING
EFFECT OF POLY (ETHYLENE GLYCOL) ON THE INJECTABILITY, SETTING BEHAVIOR AND MECHANICAL PROPERTIES OF CALCIUM PHOSPHATE BONE CEMENT.........................................................192
Sufiamie Hablee, Iis Sopyan, Maizirwan Mel, Hamzah Mohd. Salleh, Md. Mujibur Rahman
MECHANICAL AND AEROSPACE ENGINEERING
STUDY OF MESH QUALITY IMPROVEMENT FOR CFD ANALYSIS OF AN AIRFOIL................................................ 203
Farah Aqilah, Mazharul Islam, Franjo Juretic, Joel Guerrero, David Wood, Farid Nasir Ani
MECHATRONICS AND AUTOMATION ENGINEERING
COLOR RECOGNITION WEARABLE DEVICE USING MACHINE LEARNING FOR VISUALY IMPAIRED PERSON................................... 213
Tarek Mohamed Bolad , Nik Nur Wahidah Nik Hashim, Noor Hazrin Hany Mohamad Hanif
COMBINATION OF FUSED DEPOSITION MODELLING WITH ABRASIVE MILLING FOR ATTAINING HIGHER DIMENSIONAL ACCURACY AND BETTER SURFACE FINISH ..................................... 221
Abu Naser Mohammad Amanullah Tomal, Tanveer Saleh, Md Raisuddin Khan
Whilst every effort is made by the publisher and editorial board to see that no inaccurate or misleading data, opinion or statement appears in this Journal, they wish to make it clear that the data and opinions appearing in the articles and advertisement herein are the responsibility of the contributor or advertiser concerned. Accordingly, the publisher and the editorial committee accept no liability whatsoever for the consequence of any such inaccurate or misleading data, opinion or statement.
Published by:
IIUM Press,
International Islamic University Malaysia Jalan Gombak, 53100 Kuala Lumpur, Malaysia Phone (+603) 6196-5014, Fax: (+603) 6196-6298
Website: http://www.iium.edu.my/office/iiumpress
 
DIRECT POWER CONTROL OF A DFIG BASED WIND TURBINS UNDER UNBALANCED GRID VOLTAGE WITHOUT ROTOR POSITION SENSOR
Get PDFIn this paper, the behavior of a doubly fed induction generator (DFIG) is proposed under unbalanced grid voltage and without using a rotor position sensor. There are two main methods that are been used for the detection of rotor position: using shaft sensor and sensorless algorithm. In this paper the shaft sensor is eliminated and a position sensorless algorithm is used for estimating the rotor position. Sensorless operation is more desirable than using shaft sensor, because the shaft sensor has several disadvantages related to the cost, cabling, robustness and maintenance. Also, during network unbalance, three selectable control targets are identified for the rotor side converter (RSC), i.e., obtaining sinusoidal and symmetrical stator currents, mitigation of active and reactive powers ripples and the cancellation of electromagnetic torque oscillations. The effectiveness of the proposed control strategy is confirmed by the simulation results from a 2-MW DFIG system. It is concluded that the sensorless algorithm is able to produce accurate results similar to the case of that used from shaft sensor and it can be used in the practical applications
ENERGY EFFICENT AUCTION BASED DYNAMIC SPECTRUM ACCESS NETWORK
Get PDFA framework is proposed which is aimed at increasing the much needed revenue of the wireless service providers. The model uses the price paid by the wireless users to control the amount of energy consumed and the admission process based on a dynamic spectrum access network. The scheme is based on using a first price auction process with a reserve price to allocate the radio spectrum. It allows an opportunistic access to the white space in a manner that would protect the primary users in the system. The concept of green payment is used to penalise users who require high transmit power and subsidies those who require low transmit power. This work shows that with the proposed green payment in combination with the knowledge of the reserve price, the energy consumed and the delay in an auction based dynamic spectrum access network can be reduced
ELECTROCHEMICAL CHARACTERIZATION OF POLYLACTIC ACID-BLOCK-POLY(2-VINYLPYRIDINE)/GOLD NANOPARTICLE COMPOSITES FOR GLUCOSE BIOSENSOR DEVELOPMENT
Get PDFNanocomposites that consist of diblock copolymer (BCP) and gold nanoparticles (AuNPs) can be applied as a matrix to immobilize enzymes or other molecules based on the well-defined core/shell nanostructures of these composites. In this research, polylactic acid-block-poly(2-vinylpyridine) (PLA-b-P2VP)/hydrogen tetrachloroaurate(III) hydrate (HAuCl4.3H2O) composites were hybridized and then reduced in dichloromethane (DCM) solution. The hybridizations between gold precursors and the P2VP domain were prepared with different ratios of gold to P2VP block (1:1, 1:5, 1:10, 5:1, 10:1) by taking advantage of the association between the long-pair nitrogen of the pyridine group of P2VP. The reduction of the Au3+/PLA-b-P2VP composite was accomplished by hydrazine solution in order to get gold nanoparticle/PLA-b-P2VP composites, which was visually confirmed by a direct color change from bright yellow to purple. In this work, ultraviolet–visible (UV-vis) spectroscopy and Fourier transform infrared spectroscopy (FTIR) were used to confirm the association between gold precursors and pyridine groups as well as the synthesis of gold nanoparticles.The composite which labeled as R3 (Au3+: P2VP = 10:1) showed the highest peak current based on the cyclic voltammetry (CV) measurment. Furthermore, graphene oxide (GO) was added into R3 to prepare BCP/AuNPs/GO composite and reduced to BCP/AuNPs/rGO through electrochemical reduction. The resulting BCP/AuNPs/rGO showed high potential to be used in amperometric biosensor
CHALLENGES IN TEXTILE WASTEWATER AND CURRENT PALLIATIVE METHODS: AN OVERVIEW
Get PDFEffluents from dye and textile industries are highly contaminated and toxic to the environment. High concentration of non-biodegradable compounds contributes to increased biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of the wastewater bodies. Dyes found in wastewater from textile industries are carcinogenic, mutagenic or teratogenic. Biological processes involving certain bacteria, fungi, activated carbon and carbon nanotubes (CNTs) are promising methods for treating the waste water. These methods are either inefficient or ineffective. These complexities necessitates search for new approaches that will offset all the shortcomings of the present solutions to the challenges faced with textile wastewater management. This article reviews the past and recent methods used in the treatment of the textile dye wastewater and the future opportunities for efficient treatment of textiles wastewaters
DETECTOR RESPONSE FROM THERMAL NEUTRON ACTIVATION OF CONCEALED EXPLOSIVES
Get PDFExplosives concealed in small quatitites (~100 g), buried in landmines or in baggage, can be detected by characteristic gamma rays produced by neutron activation. However, the detection response can be reduced by attenuation of the signal in the background medium. This paper carries out a Monte Carlo simulation, using MCNP-V, to estimate the gamma signal spectrum and intesity degradation at a sodium iodide (NaI) detector from a small sample of trinitrotoluene (TNT) explosive buried in limestone. It is found that the transmission across 25 cm of limestone is ~6% of the 2.2233 MeV hydrogen signal and ~20% of the nitrogen signal. An empirical formula, obtained from MCNP re-runs, is used to estimate the signal strength from TNT, buried at 5-25 cm in limestone, for a californium source (252Cf) emitting 2.31 x 107 n/s. It is found that for TNT mass in the range 0.1-3 kg, the signatures are in the range 20-2000 s-1 from nitrogen and 24-2400 s-1 from hydrogen. These estimates can be used to determine the scanning time for an explosives detection system