scholarly journals Effect of Working Atmospheres on the Detection of Diacetyl by Resistive SnO2 Sensor

2021 ◽  
Vol 12 (1) ◽  
pp. 367
Author(s):  
Andrea Gnisci ◽  
Antonio Fotia ◽  
Lucio Bonaccorsi ◽  
Andrea Donato
Keyword(s):  
Alcoholic Fermentation ◽  
Low Cost ◽  
Oxide Semiconductors ◽  
Response Recovery ◽  
Volatile Organic ◽  
Recovery Times ◽  
Quality Of Products ◽  
And Storage ◽  
Anaerobic Environment

Nanostructured metal oxide semiconductors (MOS) are considered proper candidates to develop low cost and real-time resistive sensors able to detect volatile organic compounds (VOCs), e.g., diacetyl. Small quantities of diacetyl are generally produced during the fermentation and storage of many foods and beverages, conferring a typically butter-like aroma. Since high diacetyl concentrations are undesired, its monitoring is fundamental to identify and characterize the quality of products. In this work, a tin oxide sensor (SnO2) is used to detect gaseous diacetyl. The effect of different working atmospheres (air, N2 and CO2), as well as the contemporary presence of ethanol vapors, used to reproduce the typical alcoholic fermentation environment, are evaluated. SnO2 sensor is able to detect diacetyl in all the analyzed conditions, even when an anaerobic environment is considered, showing a detection limit lower than 0.01 mg/L and response/recovery times constantly less than 50 s.

scholarly journals Analisis Pengaruh Brand Image, Harga, Dan Kualitas Produk Terhadap Keputusan Pembelian Mobil (Studi Kasus Mobil LCGC di Surakarta)

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Budi Istiyanto, Lailatan Nugroho
Keyword(s):  
Data Collection ◽  
Multiple Regression ◽  
Brand Image ◽  
Low Cost ◽  
Purchase Decision ◽  
Purchasing Decisions ◽  
Quality Product ◽  
Quality Of Products

AbstractThis study aimed to determine the effect of variable brand image, price, quality of product to decision of purchasing a car LCGC (Low Cost Green Car), either partial or jointly and to find among variables brand image, price, and quality of products which are larger role in influencing purchasing decisions LCGC car. Data collection techniques researchers did by observation and questionnaires directly by visiting the object of the research is to consumers who have made a purchase decision, especially type Agya LCGC car, AYLA, and Karimun Wagon R in Surakarta which would then be sampled. The data have been collected and tabulated and analyzed using multiple regression analysis.The results showed that the variables that significantly affect purchasing decisions is price and quality of products. While the variable Brand Image does not affect significantly. While the variables that affect predominantly variable price.Keyword: Brand Image, Price, Quality Product, Purchase Decision AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh antara variable brand image, harga, dan kualitas produk terhadap keputusan pembelian mobil LCGC (Low Cost Green Car) baik secara partial maupun secara bersama-sama dan untuk mengetahui diantara variable brand image, harga, dan kualitas produk mana yang lebih berperan dalam mempengaruhi keputusan pembelian mobil LCGC. Teknik pengumpulan data peneliti lakukan dengan cara observasi dan penyebaran kuisioner secara langsung dengan cara mendatangi obyek penelitian yaitu kepada konsumen yang telah melakukan keputusan pembelian mobil LCGC terutama type AGYA,AYLA, dan Karimun Wagon R di wilayah Surakarta yang selanjutnya akan dijadikan sampel. Data yang telah terkumpul kemudian ditabulasi dan diolah dengan menggunakan analisis regresi berganda.Hasil penelitian menunjukkan bahwa variabel yang mempengaruhi secara signifikan keputusan pembelian adalah harga dan kualitas produk. Sedangkan variabel Brand Image tidak mempengaruhi secara signifikan. Sedangkan variabel yang berpengaruh secara dominan adalah variabel harga.Kata kunci: Brand Image, Harga, Kualitas Produk, Keputusan Pembelian

scholarly journals Preferential Purchase of E-commerce Model in China

2019 ◽  
Vol 1 (1) ◽  
pp. 1-6
Author(s):  
Ming Du
Keyword(s):  
Sharp Increase ◽  
Low Cost ◽  
Poor Quality ◽  
The Internet ◽  
Customer Acquisition ◽  
Illegal Behavior ◽  
The Poor ◽  
Acquisition Costs ◽  
Quality Of Products

The popularization of the Internet has promoted the leap-forward development of e-commerce. In recent years, the increasing number of e-commerce platforms and merchants has led to a sharp increase in customer acquisition costs. Low-cost access to customers has become the main goal pursued by e-commerce merchants. The e-commerce Preferential Purchase model relies on the mainstream e-commerce platform to serve as a shopping guide for merchants of various e-commerce platforms. It provides multi-channel promotion and promotion of e-commerce products to increase customer traffic by saving money, rebates and making money. However, the credibility of the Preferential Purchase platform, the poor quality of products brought by low prices, the preferential procedures and the illegal behavior of the hierarchical agents have also become the bottleneck for the development of the Preferential Purchase model.

scholarly journals An approach of developing low cost ARM based CNC systems by controlling CAN drives

2018 ◽  
Vol 224 ◽  
pp. 01020 ◽  
Author(s):  
Georgi M. Martinov ◽  
Akram Al Khoury ◽  
Ahed Issa
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Low Cost ◽  
Cnc Machine Tools ◽  
Application Layer ◽  
Cnc Machine ◽  
Servo Drive ◽  
Wide Range ◽  
Quality Of Products

Nowadays, there is a big demand on using small sized CNC machine tools, which have low price tag, wide range of implementations, low manufacturing costs and can be used for educational purposes. These machines can achieve casual manufacturing routines, like milling and drilling in applications, where there is no need for high speed performances and super quality of products. In this work, we proposed a model of CNC for these machines and analysed its components and efficiency. The model consists of three main layers: CNC system (application layer), ARM based microcomputer as CAN master and controller (connecting layer) and Servo-Drive Step Motors (actuating layer).

scholarly journals RFID Tag Ownership Transfer Protocol with Retrospective Ability

2015 ◽  
Vol 14 (4) ◽  
pp. 121-130 ◽  
Author(s):  
Yong Gan ◽  
Lei He ◽  
Yi-feng Yin
Keyword(s):  
Location Privacy ◽  
Low Cost ◽  
Security Level ◽  
Replay Attack ◽  
Rfid Tag ◽  
Ownership Transfer ◽  
Quality Of Products ◽  
The Cost ◽  
Transfer Protocol

Abstract Tag ownership transfer is an important process for RFID system. Besides the user needs to obtain the information concerning the quality of products in some scenarios, which are attached by tags. In this paper, we proposed an ownership transfer protocol with retrospective ability and analyzed its security level by using GNY logic. The results indicate that the ownership transfer protocol provides high-quality security to RFID systems. It provides an authentication between the tag and owners and location privacy of the tag. The protocol enables to resist a replay attack, man-in-the-middle attack and desynchronization attack. It also protects forward security and backward security. Moreover, it provides the information concerning the quality of the product attached by tags. We analyzed the performance of the protocol and implemented it. The results of the empirical study show that the cost time of a tag is less than some other protocols and suitable for low-cost tags.

scholarly journals An Intelligent IoT-Based Food Quality Monitoring Approach Using Low-Cost Sensors

Symmetry ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 374 ◽  
Author(s):  
Alexandru Popa ◽  
Mihaela Hnatiuc ◽  
Mirel Paun ◽  
Oana Geman ◽  
D. Hemanth ◽  
...  
Keyword(s):  
Food Industry ◽  
Food Packaging ◽  
Low Cost ◽  
Storage Period ◽  
Original System ◽  
Gas Temperature ◽  
Essential Information ◽  
Food Monitoring ◽  
And Storage

The evolution of multipurpose sensors over the last decades has been investigated with the aim of developing innovative devices with applications in several fields of technology, including in the food industry. The integration of such sensors in food packaging technology has paved the way for intelligent food packaging. These integrated systems are capable of providing reliable information about the quality of the packed products during their storage period. To accomplish this goal, intelligent packs use a variety of sensors suited for monitoring the quality and safety of food products by recording the evolution of parameters like the quantity of pathogen agents, gases, temperature, humidity and storage period. This technology, when combined with IoT, is able to provide a lot more information than conventional food inspection technologies, which are limited to weight, volume, color and aspect inspection. The original system described in this work relies on a simple but effective method of integrated food monitoring, right at the client home, suitable for user prepared vacuum-packed foods. It builds upon the IoT concept and is able to create a network of interconnected devices. By using this approach, we are able to combine actuators and sensing devices also providing a common operating picture (COP) by sharing information over the platforms. More precisely, our system consists of gas, temperature and humidity sensors, which provide the essential information needed for evaluating the quality of the packed product. This information is transmitted wirelessly to a computer system providing an interface where the user can observe the evolution of the product quality over time.

scholarly journals Storage and Upgrading of Biogas by Physicochemical Purification in a Sudano-Sahelian Context

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5855
Author(s):  
Djomdi ◽  
Leonel Junior Mintsop Nguela ◽  
Hamadou Bakari ◽  
Hamadou Fadimatou ◽  
Gwendoline Christophe ◽  
...  
Keyword(s):  
Energy Demand ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Dark Fermentation ◽  
Steel Wool ◽  
Heating Value ◽  
Volatile Organic ◽  
And Storage

The global energy trends are currently dominated by a massive use of fossil non-renewable energy sources which are progressively depleting. In this way, the production of second-generation biogas production from organic wastes by the dark fermentation process offers, therefore, an attractive solution to diversify the present energy mix. The development of biogas production units has led to an increase in the quantity of biomethane, but it contains impurities. A biomethane purification and storage system was developed in this work to improve the quality of this biofuel. Solutions were first developed to capture carbon dioxide, hydrogen sulfide, water, and volatile organic compounds found in the initial biogas. These solutions were based on a system of purification made up of water absorption reactions and iron oxide, activated charcoal, and steel wool adsorption. Thus, the biomethane obtained after purification has been stored in an inflatable balloon before being compressed into a refrigerant bottle of R134a. The treatment system was used to release a biogas with 95 % biomethane and a law heating value (LHV) of 54 MJ/kg after purification. It also emerges that purification of 2 m3 of biogas requires 0.15 m3 of water at 20oC to produce 1.4 m3 of biomethane. This biomethane can meet an energy demand of 1624 Wh or 0.2 m3 of daily biomethane requirements. The system as a whole can allow customers with a biodigester to produce their own energy (cooking or electric) while reducing the production of green-house gases in the atmosphere.

scholarly journals Mechanically deboned meat

1990 ◽  
Vol 62 (5) ◽  
pp. 369-380
Author(s):  
L. Riihonen ◽  
J. Laine ◽  
P. Linko
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Meat Products ◽  
Raw Material ◽  
Processed Meat ◽  
Meat Industry ◽  
High Protein Content ◽  
Technological Characteristics ◽  
And Storage

Mechanically deboned meat (MDM) and mechanically deboned tissue (MDT) are used in the meat industry to an ever-increasing degree. The quality of mechanically deboned meat, its high protein content, good technological characteristics and comparatively low cost make the product a profitable and useful raw material. Mechanically deboned meat is a wholesome, nutritious, highly palatable product with a bright future as food. Its properties permit its incorporation in the production of heat-processed meat products composed of comminuted raw materials. Regulations are given in the legislation of several countries concerning the chemical composition, use and storage of such meat.

Graphene ink for 3D extrusion micro printing of chemo-resistive sensing devices for volatile organic compound detection

Nanoscale ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 5356-5368
Author(s):  
Kamrul Hassan ◽  
Tran Thanh Tung ◽  
Nathan Stanley ◽  
Pei Lay Yap ◽  
Farzaneh Farivar ◽  
...  
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Human Life ◽  
Low Cost ◽  
Conductive Ink ◽  
Printing Technology ◽  
The Core ◽  
Volatile Organic ◽  
Electronic Sensors

Printed electronic sensors offer a breakthrough in the availability of low-cost devices for improving the quality of human life. Conductive ink is the core of printing technology and is one of the fastest growing ink industries.

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