Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1987. / Includes bibliographical references (leaves 147-150). / The development of the integrated circuit which replaced the vacuum tube, started the size reduction process for computer components. These integrated circuits are made from silicon (chips) and are comprised of electronic switches, or gates. The gates are measured in size of microns. The diameter of a human hair is approximately 60 microns across. Facilities that develop, and manufacture these integrated circuits require the strictest guidelines for environmental controls and prevention of potential health hazards that personnel may encounter while working in these facilities. The major environmental controls are particle size and number, temperature, relative humidity, air flow velocity, and pressure. Providing this and other forms of control are used to develop what are called cleanrooms. Cleanrooms are used for the manufacture of a number of different kinds of products. The focus of this research will be on the microelectronics industry. This industry leads all other industries in developing systems, standards, and monitoring technologies, to control microcontamination which is the essence of what a cleanroom does. This thesis will be divided into two parts. The first part defines what a cleanroom is and what it is comprised of. Next, there will be methods presented to design this type of space in a more energy and cost efficient manner. The second part involves the research in the vertical laminar flow aspect of operating a cleanroom. The vertical laminar flow offers a structured method for controlling air flow and provides an effective means for discharging particulates out of the cleanroom. By comparison, the conventional air flow system throws the particulates in a random fashion. The vertical laminar flow has its limitations. By itself, the vertical flow operates well, but people, and equipment cause turbulence which disrupts its effectiveness. Working with these variables through research, an alternate method of working with this vertical laminar flow was developed. The results, recorded by photographs show an alternative for dealing with the turbulence and eddys caused by the operations in the cleanroom. There will be a discussion followed by a number of questions, and responses which will be the basis for this research on vertical laminar flow. / by Douglas H. Erickson. / M.S.

The contamination of sterile pharmaceutical products is a serious event which has in the worst case scenario led to patient death. Operators are the primary source of clean room contamination, with the majority of their detritus being identified as skin squames and their related microorganisms. The ability of operator associated bacterial contamination to disseminate through specialist garments worn in the clean room environment is apparent in the literature. However, despite the fibres of such garments being identified as a suitable substrate for bacteria to adhere to and grow upon, the bacterial bioburden of the surface of clean room operators’ garments is an area which severely lacks in published research. Reported here is the recovery, enumeration and comparison of the levels of bacteria on the surface of reusable antistatic carbon filament polyester clean room garments, using the direct agar contact method, following their laundering with and without terminal gamma sterilisation, immediately following their donning with operators dressing wearing either no gloves, non – sterile gloves or sterile clean room gloves, and following their wear within the clean room environment, with respect to gender. The aforementioned method, with its recovery efficiency shown to be unaffected by agar composition (NA or TSA), recovered bacteria from the surface of garments laundered with and without gamma sterilisation. Such terminal decontamination was shown to reduce the surface bacterial bioburden of the garments, especially at the chest and umbilicus regions, which were shown to harbour higher levels of bacteria than the other sites tested. The direct agar contact method, showing an increase in recovery efficiency following a 48 hour agar incubation period as opposed to a 24 hour period, also recovered bacteria from the surface of clean room garments donned by operators dressing wearing either no gloves, non – sterile gloves and sterile clean room gloves. Bacteria were transferred onto the surface of these garments via the hand borne route, with the chest and oral cavity regions being found to harbour more bacteria than the other sites tested. Overall, glove type was shown to have no effect upon the resultant bacterial bioburden of the surface of the garments, suggesting expensive clean room gloves could be substituted for their cheaper non – sterile equivalents or no gloves during the donning process without subsequently increasing the surface bacterial bioburden of the garment. The direct agar contact method also recovered bacteria from the surface of clean room garments worn by male and female operators, following their working period within a clean room environment. Gender was found to significantly affect the surface bacterial bioburden of the garments, with the surface of those garments worn by male operators being more contaminated than the surface of those worn by their female counterparts. In addition, the donning of a clean room hood was shown to reduce the levels of bacteria at the chest and posterior cervicis regions of suits worn by both genders. Overall, the direct agar contact method was identified as a successful tool to recover, enumerate and estimate the surface bacterial bioburden of reusable antistatic polyester carbon filament clean room garments. Finally, using 16S rRNA gene sequencing, found to be more reliable and accurate at identifying unknown isolates than traditional phenotypic first - stage tests, which were subsequently found to misidentify > 85 % of the isolates tested, a self - selected representative number of isolates recovered from the surface of garments during the laundering and gender comparison studies were predominantly identified as skin commensal species of Staphylococcus and Micrococcus, as well as environmental species of Bacillus. The knowledge contained within this thesis, with respect to clean room operators and their specialist garments, contributes towards improving contamination control standards within clean room facilities.

Carbon forestry projects have proliferated over last few years on the premise of cost efficient climate mitigation along with co-benefits of biodiversity conservation and livelihood improvement. Multilateral, bilateral, public and private sources have invested billions of dollars in the carbon forestry projects based on these claims. However, there is little empirical evidence to support the enthusiasm. This gap is further accentuated by the insufficient understanding of the governance challenges of these projects. These issues are social, political and ecological in nature and hence require a multidisciplinary political ecology framework for a comprehensive analysis. This thesis explores the multiple benefit claims and governance issues by analysing two forestry-based Clean Development Mechanism projects from India. One, in Haryana state focuses on private lands, the other in Himachal involves three different types of lands viz. community, public and private for plantation activities. This thesis examines the carbon, biodiversity and livelihood benefits of each project, and the governance challenges associated with them. I show that both projects have sequestered substantially less carbon than was originally predicted, which has serious implications for carbon revenues and hence economic viability of these projects. In the case of biodiversity, the results are mixed. In Haryana, the tree and herb biodiversity has improved in the project plots as compared to control plots, whereas shrub biodiversity has marginally declined. In case of Himachal project, biodiversity has declined at tree, shrub and herb levels. I have analysed livelihood impacts in terms of foregone crop, fodder and fuel wood benefits across small, medium and large category of farmers. Both the projects have adverse livelihood impacts on the participants, more so in Haryana because of the plantations on private lands. Although the project has adversely affected the livelihoods of all three categories of farmers, however it has affected small farmers the most due to their low incomes and risk-bearing capacities. Hence, these projects have serious equity implications. This thesis also explores the governance challenges of carbon forestry in terms of their interaction with existing policy mechanisms, especially the Forest Rights Act of 2006, which recognises the ownership and use rights of forest dependent communities comprehensively first time in independent India. The analysis suggests that there are various issues that carbon forestry projects pose for the implementation of the Act due to which civil society groups are opposing these projects. This thesis contributes to our understanding of the multiple benefit claims of carbon forestry projects with empirical evidence and a political ecological analysis. It shows that there is possibility of tradeoffs and many other scenarios in carbon forestry projects rather than just the projected 'win-win-win' outcomes. It contributes to the political economy literature by establishing that changes in global commodity markets can influence land use choices at local level, affecting the sustainability of such efforts. This thesis also advances the literature on governance of carbon forestry projects by reflecting on various policy and implementation level issues related to property rights, community institutions, transparency and accountability.

NA / The purpose for the research is to prove that the further rise of the world economy and China in particular is closely and directly depends on clean energy implementation in energy sector in and development within by countries. The decline of clean energy development will automatically mean the decline of the world economy and energy consumption as well as the rise of China. It’s no secret that adequate, affordable energy is the basis of the operation of any production, and human civilization. Today we no longer think their lives without those technological advances, which today have, but do not think that all these achievements were made possible only through development of new energy and new ways of primary energy production. But it’s not just that. The problem is that the reserves of energy resources, the principal of which remain oil, coal and gas, not infinite. These resources are non-renewable. According to the report of the Expert Commission of the World Resources Institute (WRI) in Washington, oil reserves will be declined by 2015. WRI does not correspond quite tempting future view that while maintaining the current figure of consumption of oil has enough for another 40 or 50 years, because many oil companies about their stocks are great doubts. According to some foreign scholars the world oil reserve are 1800 to 2300 billion barrels. Once oil reverse, increasing cost and labor-intensive production would probably reduce the produced raw materials. This will possibly happen between 2010 and 2014 year. Note the price. At present, in most countries of the world total cost of the electricity is not stated in the tariff, and distributed to the entire society. Costs due to pollution of the environment are also not included in rates, although some countries are trying to enter the “environmental tax”. This situation actually means that life from the future generation, which will take into account of all costs and consequences. Since prices are still low, the government is not especially prepared for the upcoming economic conscience pricked again. Not to mention the role of clean energy in China. China announced plans to increase use of renewable sources of energy, including the wind and the Sun, in an attempt to reduce pollution and greenhouse gases. The Deputy of the national development and Reform Commission of China Chen Demin announced that by 2020, about 15% of the energy would be pure commodities, mainly provided by the expansion projects. Study development of RES in China is now becoming an important aspect for the portrayal of the energy world.

I am researching the use of several stormwater techniques known to reduce runoff to provide future developers and municipal officials with tools to meet the stormwater post-construction runoff standards laid out in Phase II of the Clean Water Act. Specifically, I am looking at Smart Growth, Low Impact Development, Open Space Design, and Green Infrastructure. Phase II states that any new development or re-development equaling one acre or greater must be able to capture and infiltrate the first inch of rain to fall on site following 72 hours with no measurable precipitation. There is no one way to solve the problem of stormwater management; therefore we must implement an integrated approach which synthesizes these design theories to effectively manage stormwater. I used the La Rue site on Kingston Pike just before Cherokee Blvd. as a testing ground for my hypothesis. I will proceed with two design scenarios for this project. The first scenario encompasses designing the site as if it were in the pre development stages. I will keep the same building square footage, but rearrange the footprints in a more efficient layout for stormwater management. The second scenario will be a retrofit of the site to comply with Phase II standards. Though it is not a current requirement of Phase II, many professionals believe in the coming years the EPA will require the retrofit of existing developments to meet these standards. In this scenario, the building footprints will remain exactly as they are but any other features will be malleable (infrastructure, vegetation, grading, etc.). Another component in this thesis will be to determine which design theories are best suited to each scenario. My pre-investigation belief is that for the pre-development scenario, I will be able to implement parts of all four theories. For the retrofit, I believe that I will be limited mostly to Low Impact Development and Green Infrastructure. Though, it is possible that I may still be able to fit in some principles of the Smart Growth and Open Space Design (reduce impervious footprints, reduce road widths, etc.).

&Ccedil / EMTAS Steel Plant produces alloy steels used principally by the automotive industry. Demands of customers for cleaner steel with &ldquo / fewer, smaller and homogenously distributed inclusions&rdquo / are getting tighter with time. The tight demands of the customers are checked by ultrasonic testing and faulty regions are cut off and scrapped which results in production losses in steel plants. Decreasing production losses due to scrapping by producing cleaner steels is therefore a major concern. The objective of this study is to investigate factors affecting the cleanliness of the steels produced by &Ccedil / EMTAS. With this objective, the steelmaking practice used was thoroughly investigated and the possible origins of inclusions in the final product was tried to be found. Based on the findings, process parameters like temperature, time, quantities of additives to steel, intensity of stirring etc. were varied with the objective of determining the optimum production practice.

My project revolves around an idea of implementing a new propulsion technology as a key design element. Batteries have in many ways been a revolution for how we propulsion cars today. It’s one of the best, if not the best, alternative for future power sources in cars. The downside however, is the fact that it dies out after a given range, and as we have learned, a battery takes time to reload. Range anxiety is an issue and IBM is currently trying to solve just that. They will by 2030 launch a new type of battery that will more than double the energy density of some of the most cutting edge lithium ion batteries of today.   The IBM-solution for a new battery is called “Battery 500” and is an open system technology that uses common air as a reagent which upon recharge releases oxygen back to the environment.  The battery would pull in and use oxygen in a similar way to how an internal combustion engine draws in oxygen.

Background: Resistance training has proven to increase athletic performance, traditionally barbell training and Olympic Lifting have been used for this purpose. Sling training has recently been developed as a complement or substitution to traditional resistance training. Research has shown an increase in sport specific athletic performance and core stability with sling training. TRX Suspension Trainer is a newly developed sling training tool and to date no independent research has been done with the TRX. Purpose: To examine and compare muscle activation using TRX and the Olympic Lifting movement Hang Clean. Methods: 32 senior high school male soccer players participated in the study. Surface electromyographic (sEMG) data were collected on mm.erector spinae (back), m.gluteus maximus (glutes), m.vastus lateralis (quadriceps), m.semitendinosus (hamstrings) and m.gastrocnemius caput laterale (calf). Surface EMG data was collected when the subjects performed five different exercises, Hang Clean, TRX Squat Jump, TRX Front Squat and TRX Power Pull. In addition a Squat Jump was used as reference. Results: A similar muscle activation was found between Hang Clean (674 µV), TRX Squat Jump (684 µV) and TRX Front Squat (691 µV). TRX Power Pull showed the highest activation for mm.erector spinae and m.gluteus maximus but the lowest when comparing total muscle activation for all measured muscles. Conclusion: The similar amount of muscular activation for Hang Clean, TRX Squat Jump and TRX Front Squat indicates that the TRX Suspension Trainer can be used as a complement, for experienced athletes, or a substitution, for novice athletes, to traditional strength training. Coaches and athletic trainers should acknowledge the need and the importance of resistance training for athletic performance.

Ultra-wideband systems can be used in indoor wireless personal area network (WPAN) or short-range wireless local area network (WLAN) transmission. Yet owing to the effects of indoor dense multipath, it will cause more power consumption. We usually use Rake receiver to improve system performance. However, we should do some compromise between system performance and the design complexity. Thus, the concept of Selective Rake can be used to substitute for the conventional Rake receiver. Selective Rake receiver uses fewer but more powerful paths instead of using all the paths to raise system performance. Hence, we have to precisely detect the multipath components for best performance. Earlier we use CLEAN algorithm to estimate the multipath components. The CLEAN algorithm can be used in selecting the paths with relatively high energy. But as the impact of frequency selective fading makes the transmitted signal distorted, the CLEAN algorithm no longer applies to this situation. Thus, we use Multiscale CLEAN algorithm instead. Multiscale CLEAN algorithm calculate the value of cross-correlation between the received signal and a set of waveforms, and then choose the higher one as the waveform transmitted. Besides, we use Maximal Ratio Combining to weigh the different paths to get the signal with more power. We represent the signal affected by frequency selective fading by using the second derivatives of Gaussian waveform function with different effective widths of pulse. The waveforms corresponding different effective widths have different spectra which represent the different effects of fading. It is seen that that the multiscale CLEAN has better performance than the CLEAN algorithm with more precise estimation of multipath components. In simulation result, we can figure out path searching using Multiscale CLEAN algorithm is more accurate than using CLEAN algorithm. Even the path with smaller energy gain, using multiscale CLEAN algorithm can search successfully, while CLEAN algorithm cannot do.

The Ultra-Wideband (UWB) communication technology has been extensively attended in recent years. In this thesis, we propose the improved selective-Rake receiver and analyze the performance on UWB channels. The UWB transmission channels are modeled with statistical methods and its fading characteristics are discussed. Different impulse radio properties for the UWB communication system are analyzed. The system performance and design complexity issues of selective-Rake receiver (SRake) are studied. Rake receiver has difficulties achieving desired system performance in the dense multipath environment. The main ideas of SRake receiver are to obtain the SNR level on known multipath channel and to determine the desired number of Rake fingers. Matched filters and maximum likelihood detectors are utilized in the implementation of the SRake to estimate the signal time delay. The CLEAN algorithm is then used in selecting the paths with relatively high energy. Furthermore, we also propose a noise cancellation scheme for performance improvement in the SRake receiver. In the noise cancellation scheme, the multiresolution property of wavelet transform is used for filtering the noise interference caused by the rapid fluctuation factor. In addition, a two-stage search is combined with the original CLEAN algorithm to increase the accuracy of path selection. From our simulation results on the UWB channels, the improved SRake receiver, with noise cancellation and two-stage search, indeed has high SRake output SNR and better path accuracy than the original SRake receiver.