Search results

1 – 10 of 18
Article
Publication date: 2 August 2011

K. Tedi, K.Y. Cheong and Z. Lockman

The purpose of this paper is to report the effect of sputtering time on the electrical and physical properties of ZrOx. ZrOx (measured thickness is ranging from 20.5 to 51.3 nm…

Abstract

Purpose

The purpose of this paper is to report the effect of sputtering time on the electrical and physical properties of ZrOx. ZrOx (measured thickness is ranging from 20.5 to 51.3 nm) thin films as gate oxide materials are formed by metal deposition at different sputtering time and thermal oxidation techniques.

Design/methodology/approach

Zirconium is deposited on silicon substrate at three different sputtering time; 30‐, 60‐ and 120‐s continued with an oxidation process conducted at 500°C for 15 min to form ZrOx thin films. High‐resolution X‐ray diffraction (HR‐XRD), Fourier transform infrared (FTIR) spectroscopy and electrical characterizations were used to examine the properties of the thin film.

Findings

A broad ZrOx peak lies in between 26° and 31° from HR‐XRD is presumed as the effect of small thickness of ZrOx and or the ZrOx is still partially crystalline. FTIR spectroscopy results suggested that besides ZrOx, SiOx interfacial layer (IL) has also formed in all of the investigated samples. As the sputtering time increases, hysteresis between the forward and reverse bias of capacitance‐voltage curve has reduced. The lowest leakage current density and the highest oxide breakdown voltage have been demonstrated by 60‐s sputtered sample. These may be attributed to a lower effective oxide charge and interface trap density. The extracted dielectric constant (κ) of these oxides is ranging from 9.4 to 18, in which the κ value increases with the increase in sputtering time.

Originality/value

ZrOx thin film which was fabricated by sputtering method at different sputtering time and thermal oxidation techniques showed distinctive electrical results. SiOx IL formed in the samples.

Details

Microelectronics International, vol. 28 no. 3
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 26 April 2011

Taner Akan

Contextualizing its argument specifically into the role and impact of the traditional political culture on the process of modernization, this paper aims to examine the “culture…

1069

Abstract

Purpose

Contextualizing its argument specifically into the role and impact of the traditional political culture on the process of modernization, this paper aims to examine the “culture matters” approach through the two‐century experience of the top‐down modernization of the Ottoman‐Turkish civilization in the realm of state‐labor relations.

Design/methodology/approach

The paper makes a comparative analysis of the interplay between the state and craft associations in the Ottoman Empire, and then the state and labor organizations in contemporary Turkey in terms of the influence of the rules, norms and institutions transferred by the bureaucratic élites from Western Europe.

Findings

The paper concludes that a substantive democratic setting for the interplay of the state and labor organizations could not be built up without a self‐supportive political culture in view of the fact that the process of top‐down modernization/Europeanization in the Ottoman‐Turkish context has given rise to a never‐ending center‐periphery dichotomy between both inter‐class and intra‐class relationships.

Originality/value

The paper sheds light on the labor relations part of the Ottoman‐Turkish political culture and reveals its impact on the never‐ending top‐down modernization initiative.

Details

Employee Relations, vol. 33 no. 3
Type: Research Article
ISSN: 0142-5455

Keywords

Article
Publication date: 15 December 2020

Liu Qing

This essay focuses on the Chinese-Japanese Library of the Harvard-Yenching Institute and examines how the Library collected and transported Chinese rare books to the United States…

Abstract

Purpose

This essay focuses on the Chinese-Japanese Library of the Harvard-Yenching Institute and examines how the Library collected and transported Chinese rare books to the United States during the 1930 and 1940s. It considers Harvard's rationale for its collection of Chinese books and tensions between Chinese scholars and the Harvard-Yenching Institute leaders and librarians over the purchase and “export” of Chinese books.

Design/methodology/approach

This research is a historical study based on archival research at Harvard-Yenching Institute and the Harvard-Yenching Library, as well as careful readings of published primary and secondary sources.

Findings

By examining the debates that surrounded the ownership of Chinese books, and the historical circumstances that enabled or hindered the cross-national movement of books, this essay uncovers a complex and interwoven historical discourse of academic nationalism, internationalism and imperialism.

Originality/value

Drawing upon the unexamined primary sources and published second sources, this essay uncovers a complex and interwoven historical discourse of academic nationalism, internationalism and imperialism.

Details

History of Education Review, vol. 50 no. 1
Type: Research Article
ISSN: 0819-8691

Keywords

Article
Publication date: 23 August 2022

Shireen Mohammed Abed, Sabah M. Mohammad, Zainuriah Hassan, Aminu Muhammad and Suvindraj Rajamanickam

The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon (Si…

Abstract

Purpose

The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon (Si) substrate that was prepared by a low-cost method (drop-casting technique).

Design/methodology/approach

The drop-casting method was used for the seed layer deposition, the hydrothermal method was used for the growth of ZnO NRs and subsequent fabrication of UV MSM photodetector was done using the direct current sputtering technique. The performance of the fabricated MSM devices was investigated by current–voltage (I–V) measurements. The photodetection mechanism of the fabricated device was discussed.

Findings

Semi-vertically high-density ZnO (NRs) were effectively produced with a preferential orientation along the (002) direction, and increased crystallinity is confirmed by X-ray diffraction analysis. Photoluminescence results show a high UV region. The fabricated MSM UV photodetector showed that the ZnO (NRs) MSM device has great stability over time, high photocurrent, good sensitivity and high responsivity under 365 nm wavelength illumination and 0 V, 1 V, 2 V and 3 V applied bias. The responsivity and sensitivity for the fabricated ZnO NRs UV photodetector are 0.015 A W-1, 0.383 A W-1, 1.290 A W-1 and 1.982 A W-1 and 15,030, 42.639, 100.173 and 334.029, respectively, under UV light (365 nm) illumination at (0 V, 1 V, 2 V and 3 V).

Originality/value

This paper uses the drop-casting technique and the hydrothermal method as simple and low-cost methods to fabricate and improve the ZnO NRs photodetector.

Details

Microelectronics International, vol. 40 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 1 June 1967

J. Widgery

March 17, 1967 Trade Dispute — Act in furtherance of — Trade union official threatening to induce strike action by employees unless workman rejoins union — Whether threat to

Abstract

March 17, 1967 Trade Dispute — Act in furtherance of — Trade union official threatening to induce strike action by employees unless workman rejoins union — Whether threat to induce breach of contract of employment — Employers dismissing work‐man by notice under his contract of service — Whether dismissal resulting from unlawful conspiracy — Whether act of inducement actionable at suit of dismissed work‐man when based on intimidation — Whether protected by section 3 of the Trade Disputes Act, 1906 — Whether justifiable — Trade Disputes Act, 1906 (6 Edw. VII, c. 47) ss. 3, 5.

Details

Managerial Law, vol. 2 no. 3
Type: Research Article
ISSN: 0309-0558

Article
Publication date: 8 April 2021

Anindya Bose and Sarthak Sengupta

A bio-sensor has been developed in this study for the purpose of point-of-care diagnostics. Point-of-care-diagnostic is a type of diagnosis where the diagnostic centre, i.e. the…

Abstract

Purpose

A bio-sensor has been developed in this study for the purpose of point-of-care diagnostics. Point-of-care-diagnostic is a type of diagnosis where the diagnostic centre, i.e. the diagnosis kit is made available at the location of the patient when the patient needs immediate action. In this process of diagnosis a compact, portable, integrated kit must be available which can diagnose the disease of the patient by testing various analytes.

Design/methodology/approach

Using a fully experimental methodology, a blood glucose sensor is made by conducting carbon interdigitated electrode (IDE) on a flexible substrate. IDEs are used to increase the effective capacitance of the structure, as well as the effective electroactive area of the sensor. Interdigitated structure permits two-electrode sticks with “each other” and “infuse” together. As a consequence, the distance between electrodes can be tuned to a much smaller value than traditional thin-film architectures. Narrowing the distance between electrodes allows for fast ion diffusion that offers better rate capability and efficiency in power density. The fabricated device exhibits a remarkable value of sensitivity in the order of 2.741 µA mM-1 cm−2.

Findings

A highly sensitive, portable and inexpensive blood glucose sensor has been developed in this context.

Originality/value

This research study can be a scope for future research in the field of bio-sensors.

Article
Publication date: 25 January 2011

Mun Teng Soo, Kuan Yew Cheon and Ahmad Fauzi Mohd Noor

The purpose of this paper is to report on metal‐oxide‐semiconductor (MOS) capacitor‐based O2 sensors with different catalytic metal electrode (Al or Pd), deposited on both smooth…

Abstract

Purpose

The purpose of this paper is to report on metal‐oxide‐semiconductor (MOS) capacitor‐based O2 sensors with different catalytic metal electrode (Al or Pd), deposited on both smooth and porous surface (pore diameter ranging from 2.76 to 71.6 μm) of ZrO2 thin film.

Design/methodology/approach

The ZrO2 thin film has been prepared by RF sputtering and DC magnetron sputtering process followed by thermal oxidation process, whereas the electrodes were deposited on thin film by thermal evaporation. The sensors are exposed to O2 gas ambient at room temperature and the O2 sensing performance has been examined by surface characterizations and on‐line sensing electrical characterizations.

Findings

MOS capacitor O2 sensor with Pd electrode on porous ZrO2 thin film has the best sensitivity in term of both adsorption and desorption of gas. This sensor is proved to be operated in both capacitor and diode modes.

Originality/value

The paper demonstrates that room temperature MOS‐based O2 sensor operates in capacitor and diode mode conditions with focus on the effect of ZrO2 surface morphology on the sensing properties.

Details

Microelectronics International, vol. 28 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 21 January 2013

Cheng-Seong Khe, Azizan Aziz and Zainovia Lockman

Cobalt/gold hollow microspheres were successfully prepared through galvanic replacement in an organic solvent. The diameters of these hollow microspheres ranged from 800 nm to 1…

Abstract

Cobalt/gold hollow microspheres were successfully prepared through galvanic replacement in an organic solvent. The diameters of these hollow microspheres ranged from 800 nm to 1 μm. However, the surface of the hollow microsphere was very rough. Nanospikes of various lengths from about 40 to 100 nm were grown on the surface of these spheres. Initially, particles with "island-like" rough surfaces were found with the addition of 4 ml chloroauric acid (HAuCl4). When the volume of HAuCl4 increased from 4 to 5 ml, microspheres with a hollow structure were formed. Some broken microspheres were observed when HAuCl4 was further increased to 6 ml. X-ray diffraction results showed a high-intensity sharp peak of gold when the HAuCl4 in the sample increased. After the galvanic replacement reaction, the cobalt content in the sample decreased meanwhile the gold content increased. This can be seen from energy dispersive X-ray analysis spectroscopy and also evident from the thermo gravimetric analysis result. The hollow Au/Co microspheres showed two broad plasmonic peaks in the ultraviolet-visible measurement. The plasmonic peaks at longer wavelengths shifted to the near-infrared region with the addition of HAuCl4.

Details

World Journal of Engineering, vol. 9 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Open Access
Article
Publication date: 22 March 2024

Geming Zhang, Lin Yang and Wenxiang Jiang

The purpose of this study is to introduce the top-level design ideas and the overall architecture of earthquake early-warning system for high speed railways in China, which is…

Abstract

Purpose

The purpose of this study is to introduce the top-level design ideas and the overall architecture of earthquake early-warning system for high speed railways in China, which is based on P-wave earthquake early-warning and multiple ways of rapid treatment.

Design/methodology/approach

The paper describes the key technologies that are involved in the development of the system, such as P-wave identification and earthquake early-warning, multi-source seismic information fusion and earthquake emergency treatment technologies. The paper also presents the test results of the system, which show that it has complete functions and its major performance indicators meet the design requirements.

Findings

The study demonstrates that the high speed railways earthquake early-warning system serves as an important technical tool for high speed railways to cope with the threat of earthquake to the operation safety. The key technical indicators of the system have excellent performance: The first report time of the P-wave is less than three seconds. From the first arrival of P-wave to the beginning of train braking, the total delay of onboard emergency treatment is 3.63 seconds under 95% probability. The average total delay for power failures triggered by substations is 3.3 seconds.

Originality/value

The paper provides a valuable reference for the research and development of earthquake early-warning system for high speed railways in other countries and regions. It also contributes to the earthquake prevention and disaster reduction efforts.

Article
Publication date: 15 January 2022

Graziella Pagliarulo McCarron and Aoi Yamanaka

Strengths-based coaching has emerged in past decades as an asset-based approach that can help individuals identify, harness, and leverage their strengths to achieve professional…

Abstract

Strengths-based coaching has emerged in past decades as an asset-based approach that can help individuals identify, harness, and leverage their strengths to achieve professional and personal goals. This paper shares the design and outcomes of a year-long strengths-based coaching program to support leadership development within the context of one university’s women’s leadership initiative.

Program outcomes and changes in participants’ perceived confidence in identifying and applying their strengths in different contexts were evaluated through an online survey using a Likert-based REDCap survey tool after participation in the program. Findings strongly suggest that most participants lacked the self-confidence and/or self-awareness to recognize their own strengths in a granular way prior to the program. Themes that emerged in the survey findings point to the following program outcomes: participants gained an increased ability to identify and value one’s own leadership strengths, an increased ability to recognize and value the strengths of others, and a supportive community of women leaders to share experiences and reflect on the application of their strengths as part of their leadership journey.

Further studies are needed to understand and measure how a program such as this can impact one’s leader identity, self-awareness, and self-confidence. Given the critical need for women’s leadership opportunities, this program shows promise as a means to strengthen women’s leadership across career stages and disciplines.

Details

Journal of Leadership Education, vol. 22 no. 1
Type: Research Article
ISSN: 1552-9045

1 – 10 of 18