Channelization architecture for wide-band slow light in atomic vapors

We propose a ``channelization'' architecture to achieve wide-band electromagnetically induced transparency (EIT) and ultra-slow light propagation in atomic Rb-87 vapors. EIT and slow light are achieved by shining a strong, resonant ``pump'' laser on the atomic medium, which allows slow and unattenuated propagation of a weaker ``signal'' beam, but only when a two-photon resonance condition is satisfied. Our wideband architecture is accomplished by dispersing a wideband signal spatially, transverse to the propagation direction, prior to entering the atomic cell. When particular Zeeman sub-levels are used in the EIT system, then one can introduce a magnetic field with a linear gradient such that the two-photon resonance condition is satisfied for each individual frequency component. Because slow light is a group velocity effect, utilizing differential phase shifts across the spectrum of a light pulse, one must then introduce a slight mismatch from perfect resonance to induce a delay. We present a model which accounts for diffusion of the atoms in the varying magnetic field as well as interaction with levels outside the ideal three-level system on which EIT is based. We find the maximum delay-bandwidth product decreases with bandwidth, and that delay-bandwidth product ~1 should be achievable with bandwidth ~50 MHz (~5 ns delay). This is a large improvement over the ~1 MHz bandwidths in conventional slow light systems and could be of use in signal processing applications.Comment: Published in SPIE Proceedings, Photonics West 2005 (San Jose, CA, Jan. 22-27, 2005

The Covenantal Significance of Remembrance as it is Used in Luke 22:19

Remembrance, depending upon its subjects and objects, can have condemnatory as well as salvific ramifications. Secondly, there is not total agreement on who the subject of remembrance is in the Words of Institution. For some, God was intended to be the subject of the remembering rather than the disciples. The strengths and weaknesses of this position will be weighed. Finally, a concluding word is in order. The purpose of this study is to present evidence which would support the thesis that remembrance does indeed have covenantal significance. Consequently, if the word has covenantal significance, then more attention must be paid to it so that it is not treated as if the word had only slight significance

An Evangelical Lutheran Presence: A Retreat for Congregational Elders

The purpose of Even unto Death: The Spiritual Armory of the Evangelical Lutheran Church is to serve as a resource for Lutheran congregations to understand what it means to be Lutheran and why it matters in our spiritual warfare. Similarly, the purpose of this retreat is to assist congregational elders in evaluating the practices and activities of their congregations to determine if they bear faithful witness to the teachings of Scripture. I recommend congregational elders first complete Even to Death before engaging in the retreat.https://scholar.csl.edu/osp/1013/thumbnail.jp

Even Unto Death: The Spiritual Armory of the Evangelical Lutheran Church

Even unto Death: The Spiritual Armory of the Evangelical Lutheran Church is a resource for Lutheran congregations to understand what it means to be Lutheran and why it matters in our spiritual warfare. My conversations with fellow Lutherans have led me to conclude that many Lutherans do not know how to articulate what it means to be Lutheran, do not recognize that we are in the midst of spiritual warfare, and do not understand how our Lutheran heritage can assist us in spiritual warfare.https://scholar.csl.edu/osp/1012/thumbnail.jp

And the government will be upon his shoulder

This chancel drama represents meditation on Isaiah 9:6, particularly the phrase: “and the government will be upon his shoulder.” Rome, the most powerful government in the Rome, exercised a monopoly on the use of force through crucifixion. The cross struck terror in the hearts of the people. Our Savior carried a cross and was nailed to it. Various medical experts have provided graphic accounts of the physiological effects of crucifixion and pain endured by our Savior. It should also be noted that our Savior endured scourging prior to crucifixion. One of the scourging instruments was a whip with leather tails. To each leather tail was attached a bone to tear open the flesh. This chancel drama assists those gathered in reflecting on our brokenness, the brokenness of this world and how God the Father sent His Son to enter this brokenness to suffer the most humiliating and excruciating deaths for mankind. Rome, the most powerful government in the world, exercised the power of taxation, vanquished the world with its military might and subdued the population through the threat of crucifixion. As this chancel drama unfolds, from the time he was conceived by the Holy Spirit, the most powerful government in the world was on the shoulder of Jesus. Jesus did not come into this world to overthrow earthly governments. Recall how Jesus said his kingdom was not of this world. As you participate in this chancel drama, meditate on what Christ’s death and resurrection mean for you. We live in highly charged political times. One cannot escape politics and government. Yet, all government rests on Christ’s shoulder for he is King of all. That means, he is your King, your Savior, your Lord.https://scholar.csl.edu/osp/1019/thumbnail.jp

Military Imagery in Preaching: An Effective Means of Nurturing a Lutheran Identity in the Military

This major applied project consisted of two parts: a research component addressing the theoretical application of military imagery in preaching to a Lutheran military audience and an evaluative process, which tested the application of military imagery in preaching. The theoretical component, based upon the contributions of literature on cross cultural studies, leadership, strategic planning, rhetoric, and homiletics, recommended a homiletical strategy for preaching military imagery. The evaluative component validated the application of military imagery in preaching and recommended a strategy for promoting organic unity of military imagery with the other elements of the worship service

In the Path of the Flood: Exploring Carbon-Intensive Employment and Coastal Geography as Motivators of U.S. Climate Change Denial

This thesis uses multivariate regressions of the ANES 2016 Dataset to test whether working in a carbon-intensive industry affects belief in climate change. It also uses the same dataset to test whether living in an area that would see increased flooding and displacement under a climate change scenario can affect the same attitudes. Additionally, it presents crosstabulations of climate skeptics and non-skeptics by party preference, education, and turnout habits. I find that working in a carbon-intensive industry does not reduce a respondent’s likelihood to report belief in climate science. Similarly, living in a coastal area that is likely to see significant disruption in even an optimistic climate change scenario does not affect belief in climate change. Instead, the control variables of partisanship, education, and income are highly significant predictors of climate skepticism. Lastly, I find through the use of a survey mode variable that conducting the survey online rather than in-person produces a significant increase in climate-skeptic responses, providing evidence that climate skepticism elicits a kind of Bradley Effect in individuals

Optical detection of acetyl phosphate and biogenic amines

Fluorescent probes for the determination of biologically relevant anions like acetate (Ac), and acetyl phosphate (AcP) were investigated. Two known probes for anions were screened for their spectral responses towards these target molecules. With the insights obtained, new luminescent probes based on ruthenium complexes were designed, synthesized, and characterized with respect to selectivity towards AcP in organic solvents and highly competitive aqueous solutions and response towards other biologically important anions. The determination of acetyl phosphate was successfully accomplished using the fluorogenic probe RuPDO. This complex contains two oxime groups that are activated in situ by the addition of Zn2+. The rapid and direct determination of acetyl phosphate was conducted in highly biocompatible aqueous solutions at neutral pH. The metal complex itself is almost non-fluorescent (excitation wavelength: 469 nm , emission wavelength: 610 nm). The intensity of emission undergoes ca. 30-fold enhancement upon reaction with AcP in low mM concentrations in HEPES buffer at pH 7.4. An incubation time of 60 min at 37 °C is required. Upon reaction with AcP, the probe shows a 30 nm-longwave shift of emission to 640 nm. Most importantly, and unlike in common methods for determination of AcP, the presence of millimolar inorganic phosphate only weakly reduces sensitivity. Successful determination of AcP in complex biological matrices like cell medium and bacterial growth medium (even in presence of lysed cells) was shown. Furthermore, a combination of RuPDO with the enzyme acetate kinase (AK) yielded a microplate assay for the determination of the important target acetate. The analyte was successfully determined with the developed assay in various real samples (even in strongly colored samples) with excellent compliance to the manufacturer information. The linear range of the method is from 100 µM to 2 mM. The LOD of the assay is comparable to commercially available enzymatic acetate kits. Though, the acetate assay developed is more robust and inexpensive due to the use of only one enzyme. Sensing strips for biogenic amines containing an amine-reactive dye are described in Chapter 6. These additionally contain a green fluorescent (amino-insensitive) reference dye incorporated in a hydrogel matrix that is deposited on a paper strip. Such strips enable rapid and direct determination of primary amines – especially biogenic amines (BA). A color change from blue to red occurs on addition of the test strips to a slightly alkaline sample containing primary amines in a concentration range from 0.01 to 10 mM within 15 min, thus enabling rapid qualitative and semi-quantitative evaluation. The color shift is accompanied by a strong increase of the fluorescence intensity of the dye, with a peak at 620 nm after photo-excitation at 505 nm with LEDs. A home-built setup was used for quantitative readout of the strips containing high-power 505-nm LEDs in a black box and a digital camera. The strips are photographed and the digital color information stored in the camera is extracted via a red-green-blue (RGB) readout. By referencing the red channel to the green channel, a quantitative signal is obtained that was used to create pseudo-color pictures of the sensor spots and for calculation of calibration plots. Finally, the sensing system was also successfully applied to the monitoring of the spoilage of different kinds of meat

Simulation and close-to-optimal algorithm for the static load balancing of a network of heterogeneous processors

A close-to-optimal linear programming-based algorithm for the static load balancing of a network of heterogeneous processors is described and implemented. Experimental results suggest that the amount of time required by the implementation of the algorithm to balance the loads of the servers as a function of the number of servers has polynomial complexity

Lincoln and Chief Justice Taney Slavery, Secession, and the President\u27s War Powers

Testing Constitutional Limits Taney and Lincoln Of making Lincoln books there is no end. And after so many books about Lincoln, authors face the challenge of writing something that is new and fresh. In recent years, one approach taken by several authors such as James Oakes, Dan...