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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

A Small State-of-the Art Range Safety Telemetry System

Lingerfelt, Wes, Dawson, Dan 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The US Air Force is required to protect the lives of individuals and property in areas potentially hazardous as a result of launch vehicle failures occurring from Vandenberg AFB, California. This paper describes the application of modern telemetry processing equipment to the Range Safety function.
42

Primena sistema hitozan-jonska površinski aktivna materija za dobijanje mikrokapsula uljnog sadržaja / Application of chitosan-ionic surfactant system for the preparation of microcapsules with oil content

Milinković Budinčić Jelena 05 July 2019 (has links)
<p style="text-align: justify;">Mikrokapsulacija je tehnika kojom se nestabilne, međusobno inkompatibilne i biolo&scaron;ki aktivne supstance prevode u stabilniji oblik, ili se omogućuje njihovo kontrolisano i ciljano oslobađanje. Osobine formiranih mikrokapsula, kinetika i mesto otpu&scaron;tanja inkapsuliranih materija zavise, pre svega, od njihovog omotača. Savremene tendencije razvoja prehrambenih proizvoda i proizvoda farmaceutske i kozmetičke industrije, su sve vi&scaron;e usmerene ka upotrebi prirodnih i biorazgradivih polimernih materija za formiranje omotača mikrokapsula.<br />Cilj ove disertacije je mogućnost primene hitozana, netoksičnog, biorazgradivog derivata hitina, kao materije omotača mikrokapsula sa uljnim sadržajem. S obzirom na njegovu slabu povr&scaron;insku aktivnost, istraživanja su usmerena na primenu interakcija hitozana sa suprotno naelektrisanim jonskim povr&scaron;inski aktivnim materijama (PAM) u vodenim rastvorima, kao mehanizmu za njegovo deponovanje na graničnoj povr&scaron;ini ulje/voda.<br />Primenom različitih metoda (tenziometrija, viskozimetrija, turbidimetrija, merenje elektroforetske pokretljivosti) interakcije hitozana sa natrijum-dodecil-sulfatom (SDS) i natrijum-lauriletar-sulfatom (SLES) su detaljno ispitane. Definisane su promene kako na granici faza, tako i unutar rastvora, a mehanizam formiranja kompleksa hitozan/PAM različitih osobina je u potpunosti razja&scaron;njen. Utvrđeno je da do formiranja stabilnog koacervata dolazi pri masenom odnosu hitozan:SLES 1:2 i hitozan:SDS 1:2.<br />Ispitivanje uticaja interakcije hitozan-PAM na osobine emulzionih sistema tipa ulje u vodi (veličina i raspodela veličina kapi, stabilnost) omogućilo je odabir hitozan-SLES sistema kao omotača pogodnog za dobijanje mikrokapsula uljnog sadržaja. Na osnovu ovih rezulatata kao uljna faza odabrani su trigliceridi srednje dužine ugljovodoničnih lanca (TSDL). Su&scaron;enjem emulzija primenom spray drying postupka dobijene se mikrokapsule uljnog sadržaja sa vitaminom E i ispitan je uticaj umreživača na njihove osobine. Karakterizacijom dobijenih mikrokapsula (određivanje sadržaja vlage, ispitivanje morfologije povr&scaron;ine, efiksanost inkapsulacije vitamina E, kinetika otpu&scaron;tanja vitamina E u in vitro uslovima) zaključeno je da na osobine mikrokapsula utiče vrsta i koncentracija umreživača. Mikrokapsule čiji omotač nije umrežen pokazale su najbolje karakteristike.</p> / <p>Microencapsulation is a technique that unstable, incompatible and biologically active substances converted to a more stable form, or allow their controlled and targeted release. The properties of formed microcapsules, kinetics and the place of release of encapsulated substances, primarly depend on their shell characteristic. Modern trends in the development of food products and products of the pharmaceutical and cosmetic industries are increasingly focused on the use of natural and biodegradable polymeric materials for coatings.<br />The aim of this dissertation is to investigate the possibility of using chitosan, non-toxic and biodegradable chitin derivative, as a shell material of microcapsules with oil content. Due to its low surface activity, the research is focused on the utilization of chitosan interactions with opositly charged ionic surfactants (sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLES)) in aqueous solutions as mechanisms for its depositing at the oil/water interface.<br />Based on detailed investigation of interactions in the chitosan-ionic surfactant systems using different methods (tensiometry, viscometry, turbidimetry, measurement of electrophoretic mobility), changes have been defined both at the interface and within the bulk, as well as the mechanism of formation of the coacervate phase. It has been determined that at chitosan:SLES and chitosan:SDS mass ratio of 1:2 stabile coacervate were formed.<br />An investigation of the influence of interaction on the properties of oil-in-water emulsion systems (size and distribution of droplet size, stability) enabled the chitosan-SLES system to be selected as a shell suitable for obtaining microcapsules of the oil content. Also, based on these results, medium-chain triglycerides were selected as the oil phase of the emulsion.<br />Microcapsules with vitamin E were obtained by spray drying of emulsions stabilized with chitosan/SLES complex. The influence of the crosslinker on the properties of microcapsules was investigated. Characterization of obtained microcapsules (moisture content determination, investigation of the surface morphology, efficiency of the vitamin E encapsulation, release in vitro kinetics of vitamin E) showed that type and concentration of crosslinking agents had influences the properties of microcapsules. Microcapsules without crosslinking agents have the most suitable characteristics.</p>
43

Effects of hydrodynamic regime on photosynthesis in the green alga <em>Caulerpa</em>.

Driscoll, Mark D 19 March 2004 (has links)
The delivery of nutrients to the surface of marine algae can be controlled by the local hydrodynamic regime: in higher flow velocities, the Diffusive Boundary Layer (DBL) at the uptake surface is thinner, which can increase the flux of dissolved chemicals to the algal surface. If the primary productivity of an alga is controlled by the availability of a dissolved chemical, increased water flow should result in greater primary productivity due to increased chemical flux. To test the hypothesis that increased water flow will increase Photosystem II kinematics (PSII) in the green alga Caulerpa we used a Diving Pam Fluorometer to measure the maximum relative electron transport rate (Pmax), Saturation Irradiance (Ik), Non-photochemical quenching (NPQ), the light limited slope of photosynthesis vs. irradiance curve (α) and photo-chemical quenching (qP) and compared these measured values among treatments of varying flow speeds in a portable laboratory flume. We also measured the influence of water flow on values of Pmax, Ik, α , qP and NPQ in the field. Results showed that in C. racemosa collected from Tampa bay, and tested in a laboratory flume, values of Pmax and Ik were positively correlated to increase water flow, possibly indicating mass-transfer limitation. C. mexicana, collected from the Florida Keys, showed a decrease in values of Pmax, and Ik with increasing water velocity in flume experiments, indicating that the increased flow was resulting in physiological stress. This result was supported with field measurements for C. sertularioides, which showed a negative correlation between Pmax and flow velocity and Ik and flow velocity.
44

Undersökning av modulationsscheman för existerande bredbandsteknologier / A Study of Modulation Schemes for Existing Broadband Technologies

Lundström, Petra January 2005 (has links)
<p>In this thesis some different modulation schemes for xDSL-techniques are compared. The investigated techniques are ADSL, G.lite, ADSL2, HDSL, SHDSL and VDSL. The modulation methods used are DMT, CAP and different versions of PAM. Several broadband techniques also use Trellis Coded Modulation (TCM) to increase the coding gain of the transmission. For each one of the different modulation methods the signal-to-noise ratio is calculated for generating a bit error rate probability of 10-7. This is the error rate that is demanded for several of the investigated standards. Comparison is also made of the transmission capacity of the channel and how sensitive the technique is for interference in a part of the frequency band. To compare the different modulation techniques, simulations of the modulations were made. The simulations were made with MatLab and Simulink. Unfortunately Simulink only supports one- and two-dimensional TCM. Therefore no good simulations of ADSL and ADSL2 with TCM were made, because those techniques use four-dimensional TCM.</p>
45

Equalization and Near-End Crosstalk (NEXT) Noise Cancellation for 20-Gbit/sec 4-PAM Backplane Serial I/O Interconnections

Hur, Young Sik 21 November 2005 (has links)
A combined solution of the Feed-Forward Equalizer (FFE) and Near-End Crosstalk (NEXT) noise cancellation technique was suggested. The techniques increase data throughput and improve link quality in the 20-in FR4 legacy backplane application. Backplane channel loss and coupling noise were measured and characterized to develop the corresponding behavioral channel model. The receiver-side FFE with 4-tap Finite Impulse Response (FIR) filter structure was adopted as the optimum equalizer topology. The 4-tap FIR filter consists of tap delay line with tap-spacing 33 ps and linear tap-gain amplifiers. The tap coefficients were calculated with the Minimum-Mean-Squared-Error (MMSE) algorithm. A 0.18-um CMOS 4-tap FIR filter IC was designed and fabricated. The experiment results showed the 20-Gbit/sec 4-PAM and 10-Gbit/sec NRZ signal were successfully equalized for the 20-in FR4 legacy backplane channel. Moreover, the suggested NEXT noise cancellation technique consists of coarse- and fine-cancellation stages. The 0.18-um CMOS building block ICs such as 7-tap FIR filter, tunable active Pole-Zero (PZ) filter, and a temporal alignment delay line were fabricated. The experiment results showed that 6-dB Signal-to-Noise Ratio (SNR) improvement was achieved by the developed NEXT noise cancellation technique.
46

none

Tsai, Chiao-hung 30 August 2010 (has links)
none
47

The Analysis of The Pan-green Electorates¡¦ Perspectives towards Development of Kaohsiung under Cross-strait Pattern

Li-Yang, You-fen 16 June 2012 (has links)
The pan-green coalition¡¦s perspectives towards development of Kaohsiung under cross-strait pattern are investigated in this disquisition. The gist of the study, that adopts Dr. Ming-shen Wang¡¦s original PAM (Public Affairs Management) and SDM (Social Development Matrix) methods as a foundation of its theory, and that combines MOORE¡¦s V.C.S. ( Value, Capacity, Support ) policy characterized in triangle interview issues, looks into whether the management and operation are available for Kaohsiung government¡¦s communicating of cross-strait trades. After dealing with the pan-green opinions, by interviewing 55 persons who belong to pan-green and neutral constituencies, including delegates, scholars, media, public officials, all sorts of trades, and citizens, the conclusion appears their common believes and various values of their statements. However, the conflict exists among the constituencies¡¦ knowledge towards the development of Kaohsiung city under the cross-strait circumstance. For example, at the controversial film festival year when Rebiya Kadeer was displayed without being censored, there are convincing conflicts over it between public officials and citizens. In the official group, 100 percent reveals that in democratic Taiwan, it is unnecessary to be censored at all. Comparing the citizen group, 29.4 percent suggests that it is unnecessary either, 12.6 percent accounts for the fact that it related nothing to administrators¡¦ abilities, 25.2 percent says that it needs censorship before displaying, 21 percent shows that it belongs to an ideological subject, 12 percent is miscellaneous. The final goal of two groups¡¦ statistics proves the necessaries of the equally developments between northern Taiwan and the southern, draining foreign institutional investors into Kaohsiung, promoting its development of economy, increasing the opportunities of employment, stable living and people owning their houses, prosperity in all.
48

Military Confidence Building Measures Across the Strait, constitution, cognitive and condition of the analysis - Elected representatives in the southern region.

Kang, Chia-Hao 24 August 2012 (has links)
In the study, Cross-Domain analysis is used for ¡§Factual judgement, Value judgement and Interpersonal judgement.¡¨ The result of Factual judgement is made by the interviews of seven retired officers, scholars and experts. And it proceeds as ¡§true¡¨ judgement. Value judgement is indicated by in-depth intervuews with 3 representatives to obtain the ¡§good¡¨ judgement. Interpersonal judgement is based on overall strategies of the ¡§interactive management research group¡¨ and combines it with the perpectives of all patrties, as individuals and as groups, to conclude the ¡§beautiful¡¨ judgement. All the judgements are correspomded to the analysis of the analysis of the constitution, cognitive and conditions of the research topics. In order to have effective controls of all judgement factors, the interview topics are designed from the study of Mainland China1978 reform, and the rapid economic development, the double digit military spending, and the discussion of ¡§China threat theory¡¨, and the discussion by both sides leaders, academia to establish ¡§Military Confidence Building Measures (MCBMs)¡¨ in the PAM Framemork. The 10 steps of Cross-Domain analysis are used to clarify all studied objects and factors in order to obtain the recognition of experts. The practical policy suggestions are expected. Under PAM Framework, factual judgement perspective, majority of scholars and retired officers agree the necessary to establish ¡§Military Confidence Building Measures (MCBMs)¡¨. However due to the lack of political trust, time is not yet ripe. Retired officers suggest communication through media may solve the obstacles that impacted by the political environment in southern regions. Scholars have proposed that the southern people are affected by their own political inclinaitions, as well as the idea of their supported parties. From non-government exchange to government exchange, the recognition by people can be achieved by understanding the cultural difference and proceed to political and military trust. In vaule judgement, representatives realized the topic is involved in cross-strait relationship, political and military aspect and the uncertainty of policy. Therefore, they all took a more conservative point of view. However, they all agree that MCBMs should be based on the removal of missiles, and follow by the current policy ¡§economy first, political after¡¨ to establish non-government exchange. Due to state of hostility, it is recommended to start from oversea activities such as sea rescue and anti-piracy project. Work from political trust toward military trust. In interpersonal judgemant, a NGT and ISM two stages seminar is held by the ¡§interactive management research group¡¨. The participants voted through a weighted method to conclude 12 specific strategies to establish MCBMs. The strategies are summarized as follow: 1. Removed the missile targeting Taiwan from Mainland China to show the premise of MCBMs. 2. Provide National defense information for each party, to promote cross-strait arms information transparence, and eliminate ideological confrontation. 3. The establishment of cross-strait joint rescue mechanism. 4. The establishment of hotline for leader on both side. 5. The establishment of regular exchange visits of high level military decision makers on both sides. 6. The establishment of cross-strait military information interaction and communication platform. 7. The establishment of oversight system for MCBMs, such as supervised NGO consists of globally well-known and remarkable Cninese accepted by both sides. 8. From civil to government organization to held cross-strait military academic exchange and conference. 9. Showing grace by military budget and arm reduction. 10. Clarify the content of MCBMs. Develop cross-strait affairs negotiators. 11. Signing peace treaty to end hostile confrontation. 12.A nuclear, chemical and biological regulation treaty signed by both sides. In short, use the cross-domain analysis result to study the possibilities and challenges that might happen during the establishment of MCBMs. The following 5 recommendations can be used for future policy execution reference: 1. Strengthen the policy advocacy, public forums and policy discussion to enhance citizens¡¦ identity. 2. Strengthen cross-strait economic and cultural exchanges to relieve hostile condition. 3. Use ¡§1992 Consensus¡¨ as framework to establish political mutual trust. 4. Establish communication platform to eliminate speculations on both sides. 5. Deepen collaborative platform and signed a peace treaty.
49

Military Confidence Building Measures Across the Strait, constitution, cognitive and condition of the analysis-Take a military personnel in for example

Yu, Yeou-ruey 29 August 2012 (has links)
none
50

Southern Regional scholars and experts to the Cross-Strait negotiating a peace agreement cognitive and Analysis

Pi, Shan-Wei 07 September 2012 (has links)
Chinese President Hu Jin-tao at the 2007 congress report for the first time "cross-strait can signed a peace agreement" the concept formally written to the Chinese Communist Party official report file, and Taiwan President Ma at the Presidential Palace on October 17, 2011, presided over the "golden years series fifth press conference," first emergency relief after the easy things first, the first post-administration" to promote the principles of cross-strait relations in the next 10 years, should be highly supportive of domestic public opinion, "countries do need "and" must be in the case of congressional oversight "three premise, on whether the two sides negotiating a" cross-strait peace agreement "carefully assess" as echoes, release both hope that the development of cross-strait peace and goodwill case, seemingly difficult to promote cross-strait political dialogue seems to have a ray of hope. But whether from the Mainland Affairs Council, or the Asia-Pacific Peace Research Foundation aimed at Taiwan island made routine public opinion polls show that the people of Taiwan in favor of the establishment that is unified, only a minority, while nearly 77% of people believe that "the People's Republic of China" is a " country", and 90% of people do not agree with the Chinese Communist Party says that" Taiwan is the People's Republic of China under the rule of the provinces "remarks. Which shows that even in the Taiwan people ideas and circumstances, the people of Taiwan reunification of Taiwan and the Chinese Communist Party there is still a considerable degree of exclusion, President Ma, In this case, the Government signed a "cross-strait peace agreement" will likely contact with the Communist authorities affects the sensitive nerves of the opposition parties and the people of Taiwan for "the signing of a peace agreement for unified prelude", the island of Taiwan public opinion tends to turn the key to negotiating a cross-strait peace agreement can be completed. Involve a wide spectrum of view of the "cross-strait peace agreement", should have considerable professional before they can be aware of another political map of the island of Taiwan generally showed the "North-Blue and South-Green" distribution, the study to be analyzed from the point of view of the southern region of scholars and experts cognition and analysis of the two sides negotiating a peace agreement, and to further assess the impact of the two sides signed a peace agreement within and external factors, and the introduction of the parties scholars to analyze the possibility of discussion on the "cross-strait peace agreement" in order to make recommendations and Thinking the road.

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