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Academic literature on the topic 'Ltw'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Ltw"

Krumme, Uwe, Tommaso Giarrizzo, Rodolfo Pereira, Allan Jamesson Silva de Jesus, Christoph Schaub, and Ulrich Saint-Paul. "Airborne synthetic-aperture radar (SAR) imaging to help assess impacts of stationary fishing gear on the north Brazilian mangrove coast." ICES Journal of Marine Science 72, no. 3 (November 4, 2014): 939–51. http://dx.doi.org/10.1093/icesjms/fsu188.

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Abstract Assessing artisanal fishing effort and catches in remote tropical coastal areas is a continuous challenge for fisheries data collection. This is the first spatio-temporal analysis of the large tidal weir (LTW) fishery operating on intertidal sand banks along the world’s longest mangrove coast, north Brazil. Airborne synthetic-aperture radar (SAR) images and aerial photos were integrated with field sampling to investigate catch and discard compositions of seven LTW during the main fishing season. LTW measurements on the SAR images were used to generate estimates on daily catch, wood extraction, and sand accumulation. In a coastal stretch of 67 km, 793 LTW were identified on SAR images from 2004, including 573 active LTW. The number of active LTW in Taperaçú Bay and Caeté Bay had increased from 87 in 1998 to 132 in 2004 (52% increase), and from 92 to 202 (106% increase), respectively. Sixty-five fish species from 24 families were captured in the LTW. Ariidae, Sciaenidae, Haemulidae, and Carangidae accounted for 45, 20, 10, and 7% of the total sampled catch weight of 3441 kg, respectively. The mean daily catch per LTW was 110 kg ± 9 SE. Total discards in outer estuarine LTW were >3 times higher than in inner estuarine LTW. All Aspredinidae, Belonidae, Tetraodontidae, and Trichiuridae, and >75% of Auchenipteridae, Clupeidae, Engraulidae, Ephippidae, Loricariidae, Scombridae, and Soleidae were discarded. The LTW fishery apparently practices balanced harvesting; however, the massive LTW increase suggests fishing effort reduction to moderate levels. Mangrove wood extraction for LTW construction (22 835 m3 or 855 390 trees) and sand accumulation (144 802 m3) likely have only local scale effects, negligible for the overall ecosystem dynamics. The study highlights the potential of SAR images for use in fisheries data collection and management of tropical coasts, emphasizing the need for integration with ground-truthing field studies.

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Schramade, Willem, Dirk Schoenmaker, and Reinier De Adelhart Toorop. "Beslisregels voor langetermijnwaardecreatie." Maandblad voor Accountancy en Bedrijfseconomie 95, no. 5/6 (July 12, 2021): 211–18. http://dx.doi.org/10.5117/mab.95.64450.

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Toekomstgerichte bedrijven sturen op langetermijnwaardecreatie (LTW) in plaats van alleen op aandeelhouderswaarde. LTW gaat om het beheren en balanceren van verschillende ‘waardedimensies’: financieel, sociaal en ecologisch. Dat vergt beslisregels voor de investeringen van bedrijven. Dit artikel leidt dergelijke beslisregels af door te analyseren wat nodig is voor LTW; en hoe LTW verschilt van aandeelhouderswaardemaximalisatie. Ook schetst het artikel transitietrajecten voor bedrijven die momenteel waardevernietigend zijn op één van de dimensies. Ten slotte introduceert het eenvoudige modellen die het mogelijk maken om specifieke soorten waarde te prioriteren, in overeenstemming met de missie van de onderneming.

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FENG, XIAOBING, HAIBO HU, and XIAOFAN WANG. "THE TOPOLOGY OF A LOCAL TRADE WEB AND IMPACTS OF THE US FINANCIAL CRISIS." International Journal of Modern Physics C 21, no. 07 (July 2010): 853–66. http://dx.doi.org/10.1142/s012918311001552x.

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In this paper a local trade web (LTW) in the Asia-Pacific region is examined using the data derived from the United Nations and the International Monetary Fund. The topology of the LTW has been specified, based upon which the impacts of US financial crisis on the structural and behavior pattern of the LTW are further investigated. The major findings are given as follows. Firstly, the LTW is much more integrated than the global trade web; secondly, after the financial crisis, the fundamental structure of the network remains relatively stable but the strength of the web has been changed and the structure of the web has evolved over time. Economic implications for what have been observed are also discussed.

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Bleier, Benjamin S., James N. Palmer, Michael A. Gratton, and Noam A. Cohen. "In Vivo Laser Tissue Welding in the Rabbit Maxillary Sinus." American Journal of Rhinology 22, no. 6 (November 2008): 625–28. http://dx.doi.org/10.2500/ajr.2008.22.3244.

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Background One of the challenges in the current expansion of endoscopic sinonasal surgery is the ability to adequately reconstruct the skull base. Laser tissue welding (LTW) uses laser energy coupled to a biological solder to produce tissue bonds with burst thresholds exceeding human intracranial pressure. This technology could be used to reduce the rate of postoperative cerebrospinal fluid (CSF) leak. We performed this study to determine whether LTW can create durable tissue bonds in sinonasal mucosa that support normal wound healing and produce minimal collateral thermal injury. Methods Bilateral maxillary sinus mucosal incisions were made in 20 New Zealand white rabbits and one side was repaired using LTW. Burst pressure thresholds were measured on postoperative days 0, 5, and 15 and were compared with control using a two- way ANOVA and a post hoc Tukey test. Welds were examined histologically for thermal injury, inflammation, and fibroplasia and graded on a 4-point scale by three blinded observers. Results The burst pressures of the LTW group were significantly higher than control on postoperative day 0 (120.85 mm Hg, N = 4, SD = 47.84 versus 7.85 mm Hg, N = 4, SD = 0.78), and day 5 (132.56 mm Hg, N = 8, SD = 24.02 versus 41.7 mm Hg, N = 8, SD = 7.2; p < 0.05). By postoperative day 15 there was no significant difference between LTW (169.64 mm Hg, N = 8, SD = 18.49) and control (160.84 mm Hg, N = 8, SD = 14.16) burst thresholds. There was no evidence of thermal injury to the surrounding tissue in any group as well as no difference between experimental group and control with respect to inflammation or fibroplasia. Conclusion This is the first in vivo study showing that LTW is capable of producing tissue bonds exceeding human intracranial pressure with negligible thermal injury in sinonasal tissue. Welding can be performed endoscopically using a fiberoptic cable and may be useful in CSF leak and skull base repair.

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Van de Ven, James D., and Arthur G. Erdman. "Bridging Gaps in Laser Transmission Welding of Thermoplastics." Journal of Manufacturing Science and Engineering 129, no. 6 (July 6, 2007): 1011–18. http://dx.doi.org/10.1115/1.2769731.

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Gaps at part interfaces pose a major challenge for laser transmission welding (LTW) of thermoplastics due to the reliance on contact conduction between the absorptive and transmissive parts. In industrial applications, gaps between parts can occur for a variety of tolerance and process control reasons. Previous experimental and modeling work in LTW has focused on gap-free joints, with little attention to bridging a gap with thermal expansion of the absorbing material. A two-dimensional comprehensive numerical model simulated bridging gaps in LTW. Using the model, operating parameters were selected for welding across a 12.7μm gap and a 25.4μm gap by creating sufficient thermal strain to bridge the gap and form a weld. Using these operating parameters, PVC samples were welded in a T-joint geometry with a designed gap. The quality of the welds was assessed visually, by destructive force testing and by measuring the weld size to quantify the weld strength. All the experimental samples, for the two gap sizes, bridged the gap and formed welds. The average weld strength of the 12.7μm gap samples was 16.1MPa, while the 25.4μm gap samples had an average strength of 10.0MPa. Gaps were successfully bridged with LTW by using a two-dimensional model to design the operating parameters. To achieve higher modeling accuracy, a three-dimensional model might better simulate the thermal diffusion in the direction of laser travel.

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Virginia, Salvador, Megan Pagan, Melissa Cooper, Stella K. Kantartzi, David A. Lightfoot, Khalid Meksem, and My Abdelmajid Kassem. "Genetic Analysis of Relative Water Content (RWC) in Two Recombinant Inbred Line Populations of Soybean [Glycine max (L.) Merr.]." Plant Genetics, Genomics, and Biotechnology 1, no. 2 (June 15, 2017): 46–53. http://dx.doi.org/10.5147/pggb.v1i2.151.

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Drought affects soybean [Glycine max (L.) Merr.] and other crops productivity in the US and other parts of the world. Relative water content (RWC) is an important indicator for plant water deficit tolerance (WDT). The objective of this study is to map quantitative trait loci (QTL) for RWC and several other leaf traits such as leaf dry weight (LDW), leaf fresh weight (LFW), and leaf turgid weight (LTW) in two soybean recombinant inbred line (RIL) populations, one derived from a cross of ‘Essex’ and ‘Forrest’ (ExF, n=94) and the other is derived from a cross of ‘PI 438489B’ and ‘Hamilton’ (PIxH, n=50). In the PIxH RIL population, eight QTL were identified and mapped on 6 different linkage groups (LGs) of the soybean genome. No QTL for LFW were identified in this population. In the ExF RIL population, 10 QTL were identified and mapped on 5 different LGs of soybean. Chromosome 18 (LG G) contains clusters of QTL for LFW, LTW, and RWC in the ExF RIL population. This same chromosome contains a QTL for RWC in the PIxH RIL population. The QTL found here are important to be included in breeding programs for soybean water deficit tolerance (WDT).

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Sinaga, Juwita Boneka. "PENDAMPINGAN PENGENALAN BAHASA INGGRIS YANG MENYENANGKAN (FUN LEARNING) KEPADA ANAK USIA DINI DENGAN MENGGUNAKAN MODEL PEMBELAJARAN LTW (LISTENING, THINKING, WRITING) DI KAMPUNG CUNTING." MINDA BAHARU 4, no. 1 (February 7, 2020): 1. http://dx.doi.org/10.33373/jmb.v4i1.2050.

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Pengabdian masyarakat ini bertujuan untuk memberikan wawasan tentang menumbuhkembangkan potensi anak dengan pengenalan bahasa Inggris sejak dini dalam keluarga pada masyarakat melalui Pendampingan Pengenalan Bahasa Inggris yang menyenangkan (Fun Learning) Kepada Anak Usia Dini dengan Menggunakan Model Pembelajaran LTW (Listening, Thinking, Writing). Di Indonesia masih banyakyang belum mengusai bahasa Inggris dikarenakan kurangnya pendampingan pembelajaran yang mereka dapatkan atau baru mendapatkan pembelajaran bahasa asing ketika usia mereka sudah dewasa, sehingga daya tangkap otak kurang optimal. Sasaran pengabdian adalah masyarakat di RW 01 kampung Cunting Kel.Tanjung Uncang Kota Batam.Persiapan dilakukan dengan melakukan survei pendahuluan untuk melihat kondisi di lapangan mengenai masalah yang dihadapi masyarakat. Pelaksanaan dilakukan dengan memberikan layanan informasi menggunakan metodeyang menyenangkan menggunakan model Pembelajaran LTW (Listening, Thinking, Writing). Hasil kegiatanmenunjukkan bahwa: (1). Program pengabdian padamasyarakat dengan kegiatan pendampingan Pendampingan Pengenalan Bahasa Inggris yang menyenangkan (Fun Learning) Kepada Anak Usia Dini dengan Menggunakan Model Pembelajaran LTW (Listening, Thinking, Writing), dapat dilaksanakan dan direspon dengan baik. (2). Pelaksanaan program pengabdian pada masyarakat ini sangat bermanfaat bagi masyarakat sehingga dapat diterapkan para orang tua dengan keterbatasan guna menumbuhkembangkan potensi anak dalam berbahasa Inggris sejak dini.

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Heskel, Mary A., Danielle Bitterman, Owen K. Atkin, Matthew H. Turnbull, and Kevin L. Griffin. "Seasonality of foliar respiration in two dominant plant species from the Arctic tundra: response to long-term warming and short-term temperature variability." Functional Plant Biology 41, no. 3 (2014): 287. http://dx.doi.org/10.1071/fp13137.

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Direct measurements of foliar carbon exchange through the growing season in Arctic species are limited, despite the need for accurate estimates of photosynthesis and respiration to characterise carbon cycling in the tundra. We examined seasonal variation in foliar photosynthesis and respiration (measured at 20°C) in two field-grown tundra species, Betula nana L. and Eriophorum vaginatum L., under ambient and long-term warming (LTW) conditions (+5°C), and the relationship of these fluxes to intraseasonal temperature variability. Species and seasonal timing drove most of the variation in photosynthetic parameters (e.g. gross photosynthesis (Agross)), respiration in the dark (Rdark) and light (Rlight), and foliar nitrogen concentration. LTW did not consistently influence fluxes through the season but reduced respiration in both species. Alongside the flatter respiratory response to measurement temperature in LTW leaves, this provided evidence of thermal acclimation. The inhibition of respiration by light increased by ~40%, with Rlight : Rdark values of ~0.8 at leaf out decreasing to ~0.4 after 8 weeks. Though LTW had no effect on inhibition, the cross-taxa seasonal decline in Rlight : Rdark greatly reduced respiratory carbon loss. Values of Rlight : Agross decreased from ~0.3 in both species to ~0.15 (B. nana) and ~0.05 (E. vaginatum), driven by decreases in respiratory rates, as photosynthetic rates remained stable. The influence of short-term temperature variability did not exhibit predictive trends for leaf gas exchange at a common temperature. These results underscore the influence of temperature on foliar carbon cycling, and the importance of respiration in controlling seasonal carbon exchange.

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Lester, Stan. "A vocational qualifications system fit for adults? Revisiting some ideas from the university for industry." Higher Education, Skills and Work-Based Learning 5, no. 2 (May 11, 2015): 102–16. http://dx.doi.org/10.1108/heswbl-02-2014-0004.

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Purpose – The purpose of this paper is to make a case for creating a strand of negotiated qualifications in the English (and more generally UK) vocational education and training (VET) system, using the approach established through Ufi-Learndirect Learning through Work (LtW). Design/methodology/approach – The paper identifies some limitations in the recent Whitehead review of adult vocational education in relation to people already in work. Drawing on research into learning at work, modifications to the VET qualifications system are proposed based on the LtW approach. Findings – The VET qualifications system assumes a purpose of preparing people for occupational entry and developing essential competence. The needs of adults already in work can be accommodated provided that they can be fitted within structures reflecting this assumption. It is less able to meet the bespoke needs of individual workers or employers. The LtW approach, which enables individual accredited programmes to be negotiated, offers a way forward that preserves the integrity of the qualification system. Practical implications – Implementing a LtW-type approach in the VET sector is structurally more difficult than in higher education, although less likely to encounter academic resistance. The main challenge is likely to come from the need to modify regulatory rules and design principles for vocational qualifications. Originality/value – Individually negotiated qualifications have been resisted in VET due to largely unfounded fears about reduced rigour and loss of control of content. The proposed approach offers a means of meeting individual needs while retaining the integrity of the qualifications system and reducing the proliferation of units and content within it.

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Qin, Feng, Wenchao Zhang, Mingzi Zhang, Xiao Long, Loubin Si, Zhenjiang Li, Jiuzuo Huang, and Xiaojun Wang. "Adipose-Derived Stem Cells Improve the Aging Skin of Nude Mice by Promoting Angiogenesis and Reducing Local Tissue Water." Aesthetic Surgery Journal 41, no. 7 (January 11, 2021): NP905—NP913. http://dx.doi.org/10.1093/asj/sjab001.

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Abstract Background Adipose-derived stem cells (ASCs) are considered promising cells for skin rejuvenation. However, whether the angiogenetic effect of ASCs plays an important role in the treatment of aging skin and its influence on skin tissue remain elusive. Objectives The aim of this study was to evaluate the effect of ASCs on angiogenesis and local tissue water (LTW) in the aging skin of nude mice. Methods Twelve nude mice were randomly divided into a UVB-induced photoaging group and a natural aging group. After the mouse model had been established, ASCs and phosphate-buffered saline (PBS) were then each injected into different sides of the dorsal skin of the mice. Blood perfusion and LTW content were measured. After 7 weeks, mice were killed, and skin samples were collected to measure the thickness of the dermis, the density of the capillaries, and the expression of angiogenic growth factors. Results ASC therapy significantly increased the thickness of the dermis, the number of capillaries, and the expression of some angiogenic growth factors (vascular endothelial growth factor, insulin-like growth factor 1, and epidermal growth factor). At 7 weeks after injection, blood perfusion was significantly higher on the side injected with ASCs than on the side injected with PBS. LTW content was increased in the PBS-injected side, but the ASC-injected side showed no significant changes over time. Conclusions ASCs increased dermal thickness, promoted angiogenesis, and reduced LTW content in the skin of photoaging mice, providing a potential clinical therapy for skin rejuvenation.

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Dissertations / Theses on the topic "Ltw"

Osman, Ammar. "Low-complexity OFDM transceiver design for UMTS-LTE." Thesis, Blekinge Tekniska Högskola, Avdelningen för signalbehandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3716.

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Over the past two decades the mobile wireless communication systems has been growing fast and continuously. Therefore, the standardization bodies together with wireless researchers and mobile operators around the globe have been constantly working on new technical specifications in order to meet the demand for this rapid growth. The 3rd Generation Partnership Project (3GPP) one of the largest of such standardization bodies, works on developing the current third generation (3G) mobile telecommunication systems towards the future 4th generation. Research towards meeting the higher demands for higher data rates was the main reason for the birth of an evolution technology towards the 4th generation mobile systems. This evolution to the current 3rd generation UMTS systems was given the name E-UTRA/UTRAN Long Term Evolution (LTE) by the 3GPP. This thesis research has been carried out at the Telecommunications Research Center (ftw.) in Vienna. It was conducted in the framework of the C10 project “Wireless Evolution Beyond 3G”. One of the fields of research within this project is to have a special focus on the OFDM modulation schemes that are discussed under the new evolution technology (LTE) of the UMTS mobile networks. Therefore, this thesis focuses mainly in analyzing the new requirements, and evaluating them by designing a low-complexity UMTS-LTE OFDM based transceiver. This thesis aims mainly in studying the feasibility of this technology by means of simulation.
Tel: +46-704469795 Email: osman@ftw.at,amos04@student.bth.se, ammarmao@gmail.com

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Oliver, Gil José Salvador. "On the design of fast and efficient wavelet image coders with reduced memory usage." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/1826.

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Image compression is of great importance in multimedia systems and applications because it drastically reduces bandwidth requirements for transmission and memory requirements for storage. Although earlier standards for image compression were based on the Discrete Cosine Transform (DCT), a recently developed mathematical technique, called Discrete Wavelet Transform (DWT), has been found to be more efficient for image coding. Despite improvements in compression efficiency, wavelet image coders significantly increase memory usage and complexity when compared with DCT-based coders. A major reason for the high memory requirements is that the usual algorithm to compute the wavelet transform requires the entire image to be in memory. Although some proposals reduce the memory usage, they present problems that hinder their implementation. In addition, some wavelet image coders, like SPIHT (which has become a benchmark for wavelet coding), always need to hold the entire image in memory. Regarding the complexity of the coders, SPIHT can be considered quite complex because it performs bit-plane coding with multiple image scans. The wavelet-based JPEG 2000 standard is still more complex because it improves coding efficiency through time-consuming methods, such as an iterative optimization algorithm based on the Lagrange multiplier method, and high-order context modeling. In this thesis, we aim to reduce memory usage and complexity in wavelet-based image coding, while preserving compression efficiency. To this end, a run-length encoder and a tree-based wavelet encoder are proposed. In addition, a new algorithm to efficiently compute the wavelet transform is presented. This algorithm achieves low memory consumption using line-by-line processing, and it employs recursion to automatically place the order in which the wavelet transform is computed, solving some synchronization problems that have not been tackled by previous proposals. The proposed encode
Oliver Gil, JS. (2006). On the design of fast and efficient wavelet image coders with reduced memory usage [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/1826
Palancia

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Johansson, Mattias, and Jonas Ehrs. "Low-Power Low-Noise IQ Modulator Designs in 90nm CMOS for GSM/EDGE/WCDMA/LTE." Thesis, Linköping University, Department of Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54552.

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The current consumption of the IQ modulator is a significant part of the totalcurrent consumption of a mobile transmitter platform and reducing it is of greatinterest. Also, as the WCDMA/LTE standards specifies full duplex transmissionsand Tx and Rx are most often using the same antenna, it is crucial to have asolution with low noise generation. Two new proposals have been studied with theaim to reduce the current consumption and noise contribution of the IQ modulator.

A current mode envelope tracking IQM is the first of the studied designs. Thisimplementation lowers the bias currents in the circuit in relation to the amplitudeof the baseband input signals, meaning that a low input amplitude results in alowering of the current consumption. It proves to be very efficient for basebandsignals with a high peak-to-average ratio. Simulations and calculations have shownthat an average current reduction of 56 % can be achieved for an arbitrary LTEbaseband signal.

The second is an entirely new passive mixer design where the baseband voltagesare sequentially copied to the RF node, removing the need for V-to-I conversion inthe mixer which reduces current consumption and noise. Results from simulationshas proven that this design is fully capable of improving both current consumptionas well as the noise levels. With an output power of 4.0 dBm, the power consumptionwas 43.3 mW, including clock generating circuits. This, combined with thefact that the design is small and simple, means that there is definitely a possibilityto replace the present IQM design with a passive mixer.

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Lime, Hugo. "Cross-subframe channel estimation for low-complexity devices in LTE." Thesis, KTH, Teknisk informationsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212066.

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One of the most critical issues of wireless communication systems is the timevaryingand frequency-selective channel. Knowledge about the channel greatlyimproves communication performance. It enables coherent demodulation andmeasurements of Signal to Noise Ratio (SNR) and Channel Quality Indicators(CQI). Theses measurements are used to optimize the transmission schemes dependingon the channel conditions. Therefore, the channel estimation is one ofthe most important feature of modern wireless communication devices. In the3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system,estimation of the channel is achieved using pilots called Reference Signals (RSs)which are scattered in time and frequency. The full estimation of the channel isdone by filtering and interpolation of the estimated pilots.The 3GPP Release 13 issued in June 2016 defines a new category of UserEquipment (UE) named category M1 (Cat-M1) which should support low SNRscenarios. At such low SNR, legacy channel estimation techniques based on persubframeestimation are not efficient enough. The standard thus enables crosssubframechannel estimation by insuring persistence of the channel conditionsduring a group of subframes.This thesis presents techniques for cross-subframe channel estimation. It showshow algorithms can be devised to obtain improved estimation accuracy comparedto single-subframe channel estimates while being resistant to Doppler effect andclock frequency offset. Three types of algorithms are studied: linear averaging,first-order Infinite Impulse Response (IIR) filters and Finite Impulse Response(FIR) Wiener filters. An analytic study of these algorithms is performed to findoptimal parameters in terms of channel estimation Mean Square Error (MSE).Algorithm validation is done with computer simulations to show that the BitError Rate (BER) performance of low-complexity algorithms (linear averagingand first-order IIR filtering) are very close to optimal Wiener filtering ones andthat they provide significant improvement over single-subframe techniques.
En av de viktigaste aspekterna i trådlösa kommunikationssystem är tids- och frekvensvariationernai radiokanalen. Kanalkännedom förbättrar kommunikationsprestandaavsevärt. Det möjliggör koherent demodulering och mätning av signaltill brus-förhållande (SNR) och andra kanalkvalitetsindikatorer (CQI). Dessamätningar används för att optimera sändningsmetoden beroende på kanalförhållandena.Därför är kanalskattning en av de viktigaste delarna i modern trådlöskommunikationsutrustning. I system baserade på 3rd Generation Partnership Project(3GPP) Long Term Evolution (LTE), skattas kanalen med hjälp av så kalladereferenssignaler (RS), som är fördelade i tid och frekvens. Den fulla kanalskattningengörs genom filtrering och interpolering av den RS-baserade skattningen.I 3GPP-standarden Release 13, fastslagen i juni 2016, definieras en ny kategoriav användarutrustning benämnd kategori M1 (Cat-M1), som ska stödja scenarionmed lågt SNR. Vid så låga SNR ger inte standardkanalskattningsmetoder baseradepå skattning per delram (subframe) tillräcklig prestanda. Standarden möjliggördärför kanalskattning över flera delramar, genom att säkerställa att kanalvalen ärkonstanta över en grupp av delramar.Denna avhandling presenterar metoder för kanalskattning baserad på flera delramar.Den visar hur metoder kan utformas för att nå förbättrad skattningsnoggrannhetjämfört med skattning från en ensam delram, även vid Dopplerspridningoch avvikande klockfrekvens. Tre typer av algoritmer studeras: medelvärdesbildning,första ordningens återkopplat filter (IIR-filter) samt FIR Wiener-filter. Enanalytisk studie av dessa algoritmer genomförs för att hitta optimalt parameterval,i termer av medelkvadratfelet (MSE) för skattningsfelet. Validering av algoritmernagörs mha datorsimuleringar, som visar att bitfelshalten för lågkomplexitetsalgoritmerna(medelvärdesbildning och första ordningens IIR-filtrering) är väldigtnära vad som nås med optimal Wienerfiltrering och att de ger betydande vinsterjämfört med tekniker baserade på en ensam delram.

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Roderick, Christopher. "The thermodynamic first law for black holes in low-energy string theory." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23293.

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The prescription of R. M. Wald for determining a thermodynamic first law for stationary, axisymmetric, asymptotically flat black holes in general theories of gravity is applied to the effective Lagrangian for the bosonic sector of low-energy heterotic super-string theory. It is found that the presence of the gauge fields necessitates an alteration of the prescription. Specifically, the Lie derivatives with respect to the Killing vector of the gauge fields are non-vanishing. This introduces new terms which ensure gauge-invariance of the final result in a natural way.

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Baldan, Giancarlo. "Low complexity quantized controllers for LTI systems : peak-to-peak performance guarantees." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/103717.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 139-143).
In this thesis, we propose a novel feedback control scheme for unstable LTI systems performing noise attenuation via a finite-rate digital channel. In the first part of the thesis, we introduce the structure of the control system as well as the encoder and decoder used to transmit the required control signals along the digital channel. The performances of the proposed algorithm are then evaluated by providing explicit bounds on the peak-to-peak noise attenuation, in regards to the induced l[subscript infinity symbol] gain of the closed loop . This result is obtained by constructing a new class of storage functions that can be employed to verify the dissipativity of the closed loop system with respect to a suitable supply rate function. In the second part of the thesis, we examine the trade-off between the closed loop performances and the required rate of the channel. While the digital channel imposes some limitations on the achievable induced l[subscript infinity symbol] gain, we show how the performances of the proposed scheme can still approximate those achievable without communication constraints provided that the rate of the channel is large enough. A numerical optimization problem is then devised to design the parameters of the control scheme in order to minimize the strain on the channel while matching some prescribed constraints on the closed loop induced l[subscript infinity symbol] gain.
by Giancarlo Baldan.
Ph. D.

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Niven, Douglas R. "The Wiedemann-Franz law in interacting disordered electronic conductors at low temperatures." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403600.

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Molinaro, Laura A. "Examination of Contributory Factors to the Low Representation of Women in Law Enforcement." Thesis, Northcentral University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3573278.

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Since the passage of the Equal Employment Opportunity Act of 1972, which amended the Civil Rights Act of 1964, female law enforcement officers have battled obstacles and barriers, both external and internal in their effort to gain equality and assimilate into the role of police officer. The problem examined in this qualitative study was the low percentage of women in sworn law enforcement positions of all ranks. Thirty-six sworn female officers currently serving in the state of Arizona were selected to participate in focus group discussions to assist in the phenomenological examination of low representation of women in law enforcement. The female officers were asked a series of questions to facilitate discussion in an effort to explore their experiences and possibly reveal underlying police cultural factors that may lead to limited opportunities for women who choose law enforcement as a career. The qualitative design fostered a sharing of the stories of these female officers and provided an in-depth understanding of their experiences both on and off the job related to their choice of career. Information-rich data provided by the participants served to inform the Arizona law enforcement community concerning the experiences and career choices of women in law enforcement. Discovered through focus group discussions were the reasons women choose law enforcement as a career as well as why they remain in the profession. The excitement of the job coupled with job security, and salary factored into the decision making processes. Data addressing promotion, leadership, and role models were also revealed with female officers advising an inequitable promotional process, yet one in which they believed women needed to participate to improve the profession for others. Recommendations of formal mentoring and succession planning were made along with changes in the recruitment process. Future study should include male participants as well as female participants. Funding sources or sponsoring organizations should be explored in an effort to expand the scope of future study. Conducting focus groups discussions in different parts of the state and for longer periods of time would permit individuals from different areas of the state an opportunity to participate.

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Gao, Xudong [Verfasser], and Karin [Akademischer Betreuer] Lind. "Low-mass Stellar Evolution Traced with Non-LTE Abundances / Xudong Gao ; Betreuer: Karin Lind." Heidelberg : Universitätsbibliothek Heidelberg, 2020. http://d-nb.info/120588386X/34.

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Newman, Christopher J. "Optimal pathways for low-level public order law : cross-jurisdictional perspectives and comparative standardizations." Thesis, University of Sunderland, 2011. http://sure.sunderland.ac.uk/3792/.

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This thesis explores the boundaries of low-level public order law, drawing on optimal pathways and standardizations across the four legal systems of England and Wales, Australia, The United States of America and Germany. The aim is to identify the origins of the public order frameworks, explore limits of proscribed behaviour and to determine whether low-level public order laws satisfy the requirement of certainty within the respective jurisdictions. The requisite mental elements are investigated alongside the range of defences available to those accused of such an offence. In order to fully investigate the unique synergies between protest and low-level public order, the study uses a comparative approach to examine the interaction between the low level provisions and constitutionally guaranteed rights to free expression; including an examination of the conceptual analysis of the wider frameworks within which protest and low-level public order operate. As the source of much contemporary protest, the impact of the War on Terror upon the nexus between public order and protest will also be examined in respect all of the jurisdictions. It is argued that the law relating to low-level public order in all jurisdictions is, to some extent, based around “catch all” provisions that criminalize a broad range of behaviour and also allow the police and the courts a wide range of discretion when dealing with such offences. The various solutions in respect of structure, operation and judicial interpretation of the offences will be examined. This will highlight standardizations and also fundamental disparities between the four jurisdictions. Such a comparative investigation is unique. The study draws upon multiple standardizations to model the lower end of criminality across the four diverse legal systems, providing dynamic areas of contrast through an examination of both civil law and common law solutions to the treatment of low-level disorder. The efficacy of both codified and ad hoc arrangements to regulate disorder while guaranteeing the right to protest are also assessed. The thesis contributes to the understanding of the scope and contours of low-level public order law as well as extrapolating optimal solutions from the findings of this study.

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Books on the topic "Ltw"

Ascaso, Oscar Abril. LTM: (Low-tech music). Malaga: Centro de Ediciones de la Diputación de Málaga, 2004.

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Caenegem, R. C. van. Law, history, the Low Countries, and Europe. London: Hambledon Press, 1994.

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Japan. Kokusai Denshin Denwa Company, Ltd. law: As amended. [Tokyo: Research Institute of Telecommunications and Economics, Japan, 1998.

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New York (N.Y.). Department of Design and Construction. Local law 77: DDC ultra-low sulfur diesel manual. New York]: New York City Department of Design and Construction, 2004.

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Massachusetts Continuing Legal Education, Inc. (1982- ), ed. Family law advocacy for low and moderate income litigants. 2nd ed. Boston, MA: Massachusetts Continuing Legal Education, Inc., 2008.

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Eric, McClellan, ed. How to build max-performance Chevy LT1/LT4 engines. North Branch, MN: CarTech, 2012.

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International Workshop on Low Temperature Detectors (9th 2001 Madison, Wis.). Low temperature detectors: Ninth International Workshop on Low Temperature Detectors : Madison, Wisconsin, 22-27 July 2001 : LTD-9. Edited by Porter F. Scott, University of Wisconsin--Madison, and Goddard Space Flight Center. Melville, N.Y: American Institute of Physics, 2002.

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Nnamani, G. C. Genna Publications Ltd. presents Judicial remedies pending appeal under the Nigerian Law. Nsukka, [Nigeria]: Genna Publications, 2010.

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Ballantyne, Penny. Low salt, low sugar, low fat desserts. San Leandro, Calif: Bristol Pub. Enterprises, 1988.

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Haralambous, Nicola. Law express: Criminal law. Harlow, Essex, England: Pearson Education Limited, 2012.

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Book chapters on the topic "Ltw"

López, Otoniel, Miguel Martínez-Rach, Pablo Piñol, Manuel P. Malumbres, and José Oliver. "Low Bit-Rate Video Coding with 3D Lower Trees (3D-LTW)." In Lecture Notes in Computer Science, 256–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13803-4_32.

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Castellani, Gastone C., and Isabella Zironi. "Biophysics-Based Models of LTP/LTD." In Hippocampal Microcircuits, 555–70. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-0996-1_19.

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Streffer, Christian, H. Bolt, D. Føllesdal, P. Hall, J. G. Hengstler, P. Jakob, D. Oughton, K. Prieß, E. Rehbinder, and E. Swaton. "Low Doses in Health-Related Environmental Law." In Low Dose Exposures in the Environment, 325–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08422-9_10.

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"LTW OF SOFTWARE SYSTEM." In Economic and Financial Analysis for Engineering and Project Management, 159–66. CRC Press, 1999. http://dx.doi.org/10.1201/9781482293951-20.

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"LTα, LTβ." In Encyclopedia of Genetics, Genomics, Proteomics and Informatics, 1124. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6754-9_9602.

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"Chapter 1. Introduction: High law, low law, not law." In Petty Justice, 1–36. Toronto: University of Toronto Press, 2014. http://dx.doi.org/10.3138/9781442621770-005.

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Bayliss, C. R., and K. F. Langley. "Management of Low Level Wastes (LLW)." In Nuclear Decommissioning, Waste Management, and Environmental Site Remediation, 193–200. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075067744-8/50022-9.

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POULIK, M. D., and T. SEKINE. "Low Molecular Weight (LMW) Urinary Proteins." In Protides of the Biological Fluids, 3–13. Elsevier, 1985. http://dx.doi.org/10.1016/b978-0-08-031739-7.50006-9.

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"Low-threshold Calcium Spike (LTS) Burst." In Encyclopedia of Pain, 1746. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-28753-4_101166.

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"Low-Threshold Calcium Spike Bursting (LTS)." In Encyclopedia of Pain, 1747. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-28753-4_101167.

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Conference papers on the topic "Ltw"

Lopez, O., M. Martinez, P. Pinol, M. P. Malumbres, and J. Oliver. "E-LTW: An enhanced LTW encoder with sign coding and precise rate control." In 2009 16th IEEE International Conference on Image Processing (ICIP 2009). IEEE, 2009. http://dx.doi.org/10.1109/icip.2009.5414210.

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Mayboudi, L. S., A. M. Birk, G. Zak, and P. J. Bates. "Thermal Imaging Studies and 3-D Thermal Finite Element Modeling of Laser Transmission Welding of a Lap-Joint." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13780.

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Laser transmission welding (LTW) is a relatively new technology for joining plastic parts. This paper presents a three-dimensional (3-D) transient thermal model of LTW solved with the finite element method (FEM). A lap-joint geometry was modelled for unreinforced nylon 6 specimens. This thermal model addressed the heating and cooling stages in a laser welding process with a stationary laser beam. This paper compares the temperature distribution of a lap-joint geometry exposed to a stationary diode laser beam, obtained from 3-D thermal modelling with thermal imaging observations. It is shown that the thermal model is capable of accurately predicting the temperature distribution when laser beam scattering during transmission through the polymer is included in the model. The weld dimensions obtained from the model have been compared with the experimental data and are in good agreement.

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Ying, Ming, Guijun Bi, Jun Wei, and Paramasivam S/O Ramachandra. "Laser Transmission Welding of Transparent Thermoplastics Microfluidic Devices." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86234.

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Laser transmission welding (LTW) is a widely employed joining technique for thermoplastics microfluidic devices bonding with its distinctive advantages, such as non-contact and no relative part movement. One basic requirement for successful laser transmission welding is that one of the plastics needs to be optically transparent for the wavelength of the laser radiation with the other being laser absorbing. The current study aims to develop laser transmission welding process for the bonding of two transparent polycarbonate (PC) microfluidic substrates with the channel size of 50μm. Transparent laser absorbent material is applied on the one substrate surface to make a laser absorbing interface. A fully coupled thermal-displacement finite element (FE) model is established to simulate the performances of the welding. The process window, including laser power, scanning speed and clamping force, is derived with the modeling method. The welded channel quality, in terms of collapsed height, clogging size, and bonding strength, can meet the requirements of microfluidic device applications.

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"Cover page." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947388.

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"Title page." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947389.

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"Copyright page." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947390.

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"Preface." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947391.

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"Contents." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947392.

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"LTB-3D conference committee." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947393.

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"Conference sponsorship." In 2017 5th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D). IEEE, 2017. http://dx.doi.org/10.23919/ltb-3d.2017.7947394.

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Reports on the topic "Ltw"

K. C. Seino. Main Injector LCW (Low Conductivity Water) control system. Office of Scientific and Technical Information (OSTI), June 1999. http://dx.doi.org/10.2172/7858.

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Kersten, J. K. WRAP low level waste (LLW) glovebox operational test report. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/362572.

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Leist, K. J. WRAP low level waste (LLW) glovebox acceptance test report. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/10148105.

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Shade, J. W., J. M. Connor, D. W. Hendrickson, W. J. Powell, and R. A. Watrous. Preliminary low-level waste feed definition guidance - LLW pretreatment interface. Office of Scientific and Technical Information (OSTI), February 1995. http://dx.doi.org/10.2172/35351.

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Santarelli, Keith R. A switched state feedback law for the stabilization of LTI systems. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/993891.

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Jantzen, C. M. Engineering Study of the Hanford Low Activity Waste (LAW) Steam Reforming Process. Office of Scientific and Technical Information (OSTI), September 2002. http://dx.doi.org/10.2172/801716.

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Fox, K., and T. B. Edwards. Chemical composition measurements of the low activity waste (LAW) EPA-Series glasses. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1244072.

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Leist, K. J. WRAP low level waste restricted waste management (LLW RWM) glovebox acceptance test report. Office of Scientific and Technical Information (OSTI), November 1997. http://dx.doi.org/10.2172/10148030.

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Katz, Lawrence, and Alan Krueger. The Effect of the New Minimum Wage Law in a Low-Wage Labor Market. Cambridge, MA: National Bureau of Economic Research, March 1991. http://dx.doi.org/10.3386/w3655.

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Zaczek, Mariusz. D0 Silicon Upgrade: Redesign of the Low Conductivity Water (LCW) System at D-Zero. Office of Scientific and Technical Information (OSTI), October 1996. http://dx.doi.org/10.2172/1033271.

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