Nitriding and Denitriding of Nanocrystalline Iron System with Bimodal Crystallite Size Distribution

An artificially prepared nanocrystalline iron sample with bimodal crystallite size distribution was nitrided and denitrided in the NH3/H2 atmosphere at 350 °C and 400 °C. The sample was a 1:1 mass ratio mixture of two iron samples with mean crystallite sizes of 48 nm and 21 nm. Phase transformations between α-Fe, γ’-Fe4N and ε-Fe3-2N were observed by the in situ X-ray powder diffraction method. At selected steps of nitriding or denitriding, phase transformations paused at 50% of mass conversion and resumed after prominent variation of the nitriding atmosphere. This effect was attributed to the separation of phase transformations occurring between sets of iron crystallites of 48 nm and 21 nm, respectively. This was due to the Gibbs–Thomson effect, which establishes the dependence of phase transformation conditions on crystallite sizes.

Deviations and errors review on measuring and calculating heavy fuel oil consumption and fuel stock onboard vessels equipped with volumetric fuel consumption flowmeters

A common way of measuring heavy fuel oil consumption on board a vessel is to use volumetric fuel flow meters installed at fuel systems inlets for each of the major fuel consumers. At each stage of the fuel processing cycle, certain mass fuel losses or deviations and calculation errors occur that are not counted accurately into fuel consumption figures. The goal of this paper is to identify those fuel mass losses and measuring/calculating errors and perform their quantitative numerical analysis based on actual data. Fuel mass losses defined as deviations identified during the fuel preparation process are evaporation of volatile organic compounds, water drainage, fuel separation, and leakages while errors identified are flow meter accuracy and volumetric/mass flow conversion accuracy. By utilizing statistical analysis of obtained data from engine logbook extracts from three different ships numerical models were generated for each fuel mass loss point. Measuring errors and volumetric/mass conversion errors are numerically analyzed based on actual equipment and models used onboard example vessels. By computational analysis of the obtained models, approximate percentage losses and errors are presented as a fraction of fuel quantity on board or as a fraction of fuel consumed. Those losses and errors present between 0,001% and 5% of fuel stock or fuel consumption figures for each identified loss/error point. This paper presents a contribution for more accurate heavy fuel oil consumption calculation and consequently accurate declaration of remaining fuel stock onboard. It also presents a base for possible further research on the possible influence of fuel grade, fuel water content on the accuracy of consumption calculation.

Applications of Haar Wavelet-Finite Difference Hybrid Method and Its Convergence for Hyperbolic Nonlinear Schrödinger Equation with Energy and Mass Conversion

This article is concerned with the numerical solution of nonlinear hyperbolic Schro¨dinger equations (NHSEs) via an efficient Haar wavelet collocation method (HWCM). The time derivative is approximated in the governing equations by the central difference scheme, while the space derivatives are replaced by finite Haar series, which transform it to full algebraic form. The experimental rate of convergence follows the theoretical statements of convergence and the conservation laws of energy and mass are also presented, which strengthens the proposed method to be convergent and conservative. The Haar wavelets based on numerical results for solitary wave shape of |φ| are discussed in detail. The proposed approach provides a fast convergent approximation to the NHSEs. The reliability and efficiency of the method are illustrated by computing the maximum error norm and the experimental rate of convergence for different problems. Comparisons are performed with various existing methods in recent literature and better performance of the proposed method is shown in various tables and figures.

Lifecycle Assessment of a Non-Phase-Transition Drying Pyrolysis and Mass Conversion Technology

A lifecycle model was established to explore the efficiency, economy, and greenhouse gas emissions of a non-phase-transition drying pyrolysis and mass conversion technology, based on the principle of lifecycle assessment. The evaluation scope included straw collection and transportation, drying and crushing, biomass pyrolysis, charcoal processing, and waste heat utilization. The results show that the energy output/input ratio for non-phase-transition drying pyrolysis was 20.43, and the energy efficiency was high. The pure profit from treating wet straw was USD 45.32 per ton, the profit margin of sales was 52.11%, and the economic benefit was high. The equivalent emission of CO2 was 34.10 g·MJ−1, demonstrating high environmental benefits. Therefore, non-phase-transition drying pyrolysis and mass conversion technology is a potential biomass utilization technology with energy, economic, and ecological benefits.

Valorisation Potential of Using Organic Side Streams as Feed for Tenebrio molitor, Acheta domesticus and Locusta migratoria

Due to increasing welfare and population, the demand for alternative protein sources, obtained with minimal use of natural resources, is rising in today’s society. Insects have the potential to be used as an alternative protein source since they are considered to be able to convert low-value biomass into high-value components, resulting in opportunities for valorisation of organic side streams. Moreover, insects are suggested to be a sustainable protein source, referring to the efficient “feed to body” mass conversion potential. The aim of this review was to explore the potential to rear the yellow mealworm (Tenebrio molitor), the house cricket (Acheta domesticus) and the migratory locust (Locusta migratoria) on low or not yet valorised organic side streams within the food supply chain. This was performed by collecting research information focusing on the rearing of the insects in scope on organic biomass. In addition, the nutritional composition of the produced insects as well as their dietary requirements will be reviewed. Finally, the availability of side streams in the EU will be discussed as well as their potential to be used as insects feed.

Familial Conversion: A Case Study on the Ethical-Religious Role of the Household in the Mass Conversion of Wenzhou Christians

This article explores the familial conversion which has cumulative impact on the mass conversion of Wenzhou Christians after 194 9. Acknowledging the dramatic revival of Christianity in Wenzhou following reform and opening in China by no means precludes recognizing the hidden upsurge of conversion events before 1978. Through a ease study on the congregation of Qingpu Church in Heyang area of Wenzhou > I hope to demonstrate that the familial aspect of conversion in the form of household units> rather than individual conversions> is the key to understanding the conversion of Wenzhou Christians. The article argues that the oneness of family derived from the emotional and responsible relationships within it, along with the process of the conversion ritual, constitute the ethical-religious role of the household > which contributes to the emergence of familial conversion. This preliminary study attempts to draw more attention to family,an essential ethical and even existential cultural factor in Chinese society. It is through the family that we may come to better understand the indigenous development of Christianity in China.

The Expansion of Protestantism and Culture Change among Gedeo

This paper was primarly concerned with the expansion of Protestantism and culture change among the Gedeo people. It attempted to document the coming of branches of Christianity and their methods of expansion and the conversion of the people. Special emphasis is given to examine the impacts of expansion of Protestantism on the Gedeo traditional culture. The researcher employed qualitative paradigm; primary data were collected by formal and informal interview, document analysis, the use of oral tradition and secondary sources such as reports, journals and electronics media. Finally, the collected sources will be cross-checked and analyzed by using content narrating and descriptive method. Based on the study findings and analysis, it is deduced that, in the study area, before the introduction of Christianity, most of the people practiced indigenous belief known as Maganno, literally meant the “Sky God”. Mainly, the research reveals that Christianity arrived among the Gedeo before a century ago, following the conquest of the area by Emperor Menilek’s force. Protestantism expanded in the area by convincing method of donations and often by pulling factors that attract the people from traditional religion to Protestantism. The then general contextual background: political oppression, low economic status, lack of infrastructures, the event of epidemic and other world historical incidents have contributed to the peoples’ active conversion to Protestantism. The mass conversion of the people resulted in creating new spiritual orientations, which brought hollistic change, including the missing of indigenous cultural practices. Accordingly, the Gedeo indigenous culture was changed in many aspects: social customs, material cultures, oral literature and verbal arts or oral performance.

Repurposing Typical Institutional Hall as Temporary Covid-19 Quarantine Stations in Johor: A Review Study in KKTM

The current situation of the world with the pandemic of COVID 19 has brought a mass conversion of places as a temporary shelter recently. In Malaysia, the list of gazetted sites by the government for the COVID quarantine stations were being retrieved in March 2020 to facilitate Ministry of Health in coping with the sporadic diseases. To achieve lower production cost and rapid execution of disaster shelter for the pandemic, possible open plan spaces in institutional building will be identified to perform temporary medical shelter. Resuscitation area, wards, pharmacy, x-ray room, staff room and meeting rooms are among the required spaces in determining the medical layout planning of the particular quarantine station. A descriptive and qualitative design was being used based on the literature review and case studies in order to get the information and to identify clear demarcation of circulation and movement in the quarantine station. Ultimately, foreseeing holistic changes and novel solutions in construction industry in Malaysia, this result will contribute to further assist authorities to gazette other institutional hall as transitional stay which will be become the norms nowadays.

Visions and Realities in Hong Kong Anglican Mission Schools, 1849–1941

This article explores the tension between missionary hopes for mass conversion through Christian education and the reality of operating mission schools in one colonial context: Hong Kong. Riding on the wave of British imperial expansion, George Smith, the first bishop of the diocese of Victoria, had a vision for mission schooling in colonial Hong Kong. In 1851, Smith established St Paul's College as an Anglo-Chinese missionary institution to educate, equip and send out Chinese young people who would subsequently participate in mission work before evangelizing the whole of China. However, Smith's vision failed to take institutional form as the college encountered operational difficulties and graduates opted for more lucrative employment instead of church work. Moreover, the colonial government moved from a laissez-faire to a more hands-on approach in supervising schools. The bishops of Victoria were compelled to reshape their schools towards more sustainable institutional forms while making compromises regarding their vision for Christian education.

Design and Conception of Online Exams With Standard Software in Social Science Courses

The 2020-2021 Coronavirus pandemic has had a significant impact on teaching worldwide, prompting a mass conversion to online instruction. Universities have been greatly impacted by this. While the conversion of classic in-person, presence-based teaching formats, such as lectures and seminars, to online teaching went relatively smoothly, written exams still represent a particular challenge. Due to the nature of online instruction, it would be helpful to have online exams that can be taken from any location. The goal of the QLU-eQuiz-Project is to use standard software to create a testing environment in which university examinees can take online exams. This is not just a technical stopgap solution to the current, pressing problems of conducting examinations online during the pandemic; the project also aims to address future development toward hybrid forms, focusing on exams for social science courses – specifically, here, courses in Logistics and Business Administration. Furthermore, the project seeks to identify problems that can occur in the context of online exams and to discuss proposed solutions. For this, a series of mock and "real" online exams were conducted as QLU-eQuiz exams, both with smaller and larger groups. Part of the project compares grades on online exams with previous in-person exams.