25 research outputs found
Method and system for managing a technical installation
No full textA method (300) and system (101) for managing a technical installation (108) are disclosed. In one aspect of the invention, an event associated with at least a portion of the technical installation (108) is detected based on sensor data associated with the portion of the technical installation (108). In another aspect of the invention, a representative view (1101) of the portion of the technical installation (108) is rendered on at least one wearable device (107a-c), wherein the representative view (1101) displays information associated with the detected event in conjunction with the multi-dimensional view of the portion of the technical installation (108). In yet another aspect of the invention, a predictive time series analysis of the sensor data associated with the detected event is generated. In another aspect of the invention, the predictive time series analysis in conjunction with the representative view (1101) of the at least one portion of the technical installation (108) is displayed.Interactive Intelligenc
The political impact of African American literature: Frederick Douglass and Richard Wright
No full textIn this thesis, I examine how African Americans attempted to build new lives in the context of slavery and segregation. My study covers the last twenty years of American slavery from 1845 into the segregated America of the 1940s. To pursue my goals, I focus on African American autobiography for my primary texts. I analyze how African American heroes author free and autonomous lives documenting that process in their autobiographical accounts. In the process, we also learn about slavery and segregation through individual testimonies of these heroes which, even though are subjective accounts, add great value to the social scientific analysis of these institutions. Through this analysis, I seek to understand how revolutionary activists and writers—with Frederick Douglass and Richard Wright being my two examples—throw light on the inequities of the American system and struggled, individually and also as part of movements, to change America so that she could redeem her promise
STEREOID Data Processor: Design and Performance Analysis
No full textStereo Thermo-Optically Enhanced Radar for Earth, Ocean, Ice, and land Dynamics (STEREOID) is one of the candidates of the ESA (European Space Agency) , Earth Explorer 10 missions. The novel constellation system will consist of the active Sentinel-1 satellites and two passive spacecrafts, which can provide flexible baseline configurations. The main objective of the mission liesin monitoring the variation of spatially diverse ice sheets, the eruptions of earthquakes, the volcano activities, and the landslides, playing therefore an extremely important role in understanding the global climate dynamics and the geophysical processes involved. The purpose of the thesis is to develop an end-to-end simulator incorporating the STEREOID bistatic configuration operating in TOPS ( Terrain Observation by Progressive Scans) mode and evaluate its performance. To achieve this goal, the key component of the simulator, the SAR (Synthetic Aperture Radar) processing kernel was first implemented. The kernel employs an imaging algorithm which assists in image formation and focusing for different bistatic geometries generated by relevant working modes of the STEREOID mission. This is further extended to bistatic TOPS acquisition mode with azimuth beamforming under dual antenna receiver configuration of STEREOID. The performance of STEREOID mission is evaluated under different bistatic geometries and the dual beamforming strategy is evaluated for parameters such as resolution, pointing errors and gain imbalances. This is evaluated to analyse and understand the importance of calibration errors introduced into the system.Electrical Engineerin
Experimental and Mathematical Analyses Relating Circadian Period and Phase of Entrainment in Neurospora crassa
No full textCircadian rhythms are observed in most organisms on earth and are known to play a major role in successful adaptation to the 24-h cycling environment. Circadian phenotypes are characterized by a free-running period that is observed in constant conditions and an entrained phase that is observed in cyclic conditions. Thus, the relationship between the free-running period and phase of entrainment is of interest. A popular simple rule has been that the entrained phase is the expression of the period in a cycling environment (i.e., that a short period causes an advanced phase and a long period causes a delayed phase). However, there are experimental data that are not explained by this simple relationship, and no systematic study has been done to explore all possible period-phase relationships. Here, we show the existence of stable period-phase relationships that are exceptions to this rule. First, we analyzed period-phase relationships using populations with different degrees of genome complexity. Second, we generated isogenic F1 populations by crossing 14 classical period mutants to the same female and analyzed 2 populations with a short period/delayed phase and a long period/advanced phase. Third, we generated a mathematical model to account for such variable relationships between period and phase. Our analyses support the view that the circadian period of an organism is not the only predictor of the entrained phase.Peer reviewe
Thermal management of integrated electronics
No full textThe power densities in high-performance microelectronics has been ever-increasing and
hence, there is an increased need of Novel Thermal Management techniques. The shrinking
size of these devices coupled with rising power density has led to a substantial increase in the
temperature of the device, much beyond the desired operating temperature needed for a
reliable performance. A typical silicon based technology needs efficient thermal management
schemes which have high heat transfer co-efficients, which can dissipate heat fluxes above
≈100 W/cm2 without increasing the operating temperatures beyond ≈ 80°C .
The traditional state-of-art single phase cooling systems which rely solely on sensible heat
are very bulky and are not sufficient to fulfill our increasing requirements. As a result, we are
in need of phase-change based novel thermal management solutions which exploit latent heat
of vaporization of liquids which yield a higher heat transfer with little increase in
temperature.The author has worked with researchers at Singapore-MIT Alliance for Research and
Technology (SMART) on this issue. In this report, the author presents a multiphase thermal
management technique where arrays of cylindrical micropillars of silicon are used for thinfilm
evaporation. The author has investigated the effects of micropillar height, pitch, diameter
and the array length on maximum heat dissipation capability. An analytical model was
developed by the research team at SMART to predict the experimentally observed values of
evaporative heat flux. Due to limitations in the experimental setup, the author could only
qualitatively capture the parametric effects of micropillar geometry.Bachelor of Engineerin
Coupling chemical degumming with enzymatic degumming of ultrasound pre-treated ramie fiber using Bacillus subtilis ABDR01
No full textIn this study, we designed, developed, and optimized an enzymatic fiber degumming process. First, a Partially Purified Enzyme Solution (PPES) containing pectinase, cellulase and xylanase was co-produced via ultrasound-assisted fermentation of orange peels using Bacillus subtilis ABDR01. Then, degumming with PPES was optimized for pH, temperature, incubation time and PPES concentration. Finally, three sets of ultrasound-assisted degumming experiments - chemical, enzymatic, and coupled enzymatic-chemical degumming with reduced alkali concentration (0.5% NaOH, 30 min) were performed. Chemical degumming for 2 h with 1% NaOH at 98 degrees C resulted in residual gum content of 5.9%, whereas ultrasound-assisted (30 min, 25 kHz) chemical degumming reduced the gum content to 3.1%. At a pH of 7.5, temperature of 45 degrees C, 30 h incubation and 2% PPES, gum removal efficiency of >60% and fibers with <10% residual gum were produced. Coupling the ultrasound-assisted enzymatic degumming with reduced alkali chemical degumming resulted in gum content of <3%. (C) 2022 The Author(s). Published by Elsevier B.V
A First Report on Academic Exchange Activities in Nepal
Get PDFapplication/pdfMuroran Institute of Technology signed an academic exchange agreement with the Tribhuvan University, Prithvi Narayan Campus (PN Campus) in Nepal in 2018, and is promoting academic exchange activities in both research and exchange cooperation. Prior to the conclusion of the agreement, the author had a personal friendship with faculty members of the PN campus since 2012. They helped local arrangements for fieldwork in Nepal. In concluding an academic exchange agreement in 2018, an undergraduate student and a master student of our Institute have been participating in research workshop at PN campus, moreover, we invited faculty members of PN campus to our university for exchanges. Then, in 2019, students of our university visited the PN campus, and joined a joint workshop to interact with local students. This paper reports on the academic exchange activities between the PN Campus and Muroran Institute of Technology, centering on the implementation report of the joint workshop held in 2019.特集departmental bulletin pape
Nutrient Recovery and Recycling from Human Urine: A Circular Perspective on Sanitation and Food Security
No full textAbstractClosed-loop nutrient cycling is a simple, persuasive and elegant approach to realize efficient natural resource management, improved human well-being and long-term food security. In the spirit of sustainable sanitation through nutrient cycling, this study proposes a new pathway to realize resource recovery from anthropogenic waste fractions by the application of physico-chemical separation processes. Microwave Activated Carbon (MAC) prepared from coconut shells (agro-waste) were immobilized on etched glass bead supports and utilized within a continuous flow packed-bed column. Physical adsorption experiments were performed by passing human urine through the column to strip and recover more than 80% of the intrinsic urea. Backwashing of the column was performed to demonstrate the ease of urea-N desorption, reusability of MAC over multiple cycles and the reversible nature of the process. Further nutrient recovery was realized by dephosphatizing the column overflow with MgO to allow phosphate precipitation (>90%) as struvite. Sorption kinetics, behaviour and influence of process parameters were studied by testing the experimental data against Yoon-Nelson, Thomas and Adams-Bohart models. The column adsorption was also numerically optimized using Response Surface Methodology to determine the optimal parameters as: sorbate flow rate – 8.5 L.h-1, urea concentration – 100%, support size – 1 cm and consequently, column capacity of 21.58 g. Nutrient recovery, concentration and recycling from diverted human urine can be seen as a synergistic and circular solution to the issues of sanitation, hygiene, water, and food security
Adsorptive Resource Recovery from Human Urine: System Design, Parametric Considerations and Response Surface Optimization
No full textAbstractDespite its high concentration, potential availability and hence, potential reusability of nutrients, human urine continues to be flushed away in our toilets. The poor management of nutrients in our built environment in lieu of the representative failures in our systems to safely handle, treat and assimilate these ‘waste’ resources has resulted in considerable environmental externalities. Adsorption systems that utilize agro–waste sourced carbon as an adsorption media have shown promise in recovering plant–required nutrients from urine. This study details the applicability of two continuously operated columns for stripping urea from urine for subsequent use as fertilizers. The first column was packed with prepared carbon at various bed heights (10–50cm) and the second column had carbon immobilized over etched glass beads of various support sizes (1.5–2.5cm). By using a Box–Behnken design and Response Surface Methodology (RSM), the system was optimized with the objective of maximizing column capacities. For the packed bed, maximum sorption of 0.116g.g–1 occurs at inlet flow rate of 6 L.h–1, concentration of 100% and carbon bed depth of 30cm; in the immobilized bed, the optimal parameters were identified as flow rate of 10 L.h–1, 100% initial urea concentration and support size of 1.5cm to yield capacity of 0.328g.g–1. Immobilization as a pre–treatment in column design was significantly advantageous in recovering higher amount of urea at lesser activated carbon input relative to the packed bed. RSM was found to be an effective tool for selecting the process parametric inputs, in describing their effects on the operation of the column and in maximizing the urea recovery
Resource Recovery and Recycling in Sanitation is Key to Health, Water and Food Security
No full textAbstractThe present study argues that the issue of sanitation and the solutions to it extends far beyond its mere access; any envisioned improvement in sanitation technology must strive to rectify the shortcomings in centralized wastewater treatment wherein end-of-pipe technologies have been favored. It is evident that with the concurrent trends of projected population growth and urbanization, the provisioning of improved sanitation facilities will necessitate greater efforts and socio-technical innovations than those in place today. We thus illustrate that simultaneous provisioning of ‘access’ and ‘improved sanitation’ through urine diversion and resource recovery can help create multiple-win scenarios in developing countries especially in terms of health, food and water security. As a pathway for initiating circularity in flow of resources from sanitation to agriculture, we demonstrate a process that enables continuous recycling of nutrients (urea) following the source separation of urine from a urine diversion toilet. To do this, we look towards cyclical adsorption-desorption systems in a fixed-bed column packed with renewable agro-waste based activated carbon. The study places emphasis on the sorption optimization for which a Box-Behnken experimental design with Response Surface Methodology was applied. It was concluded that a column bed depth of 45.45cm, urine flow rate of 2 L.h-1 and initial concentration of 20% allows 87.53% recovery of urea from human urine
