Evidence for multiple structural genes for the γ chain of human fetal hemoglobin

A sequence with a specific residue at each position was proposed for the γ chain of human fetal hemoglobin by Schroeder et al. (1) after a study in which hemoglobin from a number of individual infants was used. We have now examined in part the fetal hemoglobin components of 17 additional infants and have observed that position 136 of the γ chain may be occupied not only by a glycyl residue, as previously reported, but also by an alanyl residue

Feasibility analysis of reciprocating magnetic heat pumps

The conceptual design selected for detailed system analysis and optimization is the reciprocating gadolinium core in a regenerative fluid column within the bore of a superconducting magnet. The thermodynamic properties of gadolinium are given. A computerized literature search for relevant papers was conducted and is being analyzed. Contact was made with suppliers of superconducting magnets and accessories, magnetic materials, and various types of hardware. A description of the model for the thermal analysis of the core and regenerator fluids is included

Truncated Variational Sampling for "Black Box" Optimization of Generative Models

We investigate the optimization of two probabilistic generative models with binary latent variables using a novel variational EM approach. The approach distinguishes itself from previous variational approaches by using latent states as variational parameters. Here we use efficient and general purpose sampling procedures to vary the latent states, and investigate the "black box" applicability of the resulting optimization procedure. For general purpose applicability, samples are drawn from approximate marginal distributions of the considered generative model as well as from the model's prior distribution. As such, variational sampling is defined in a generic form, and is directly executable for a given model. As a proof of concept, we then apply the novel procedure (A) to Binary Sparse Coding (a model with continuous observables), and (B) to basic Sigmoid Belief Networks (which are models with binary observables). Numerical experiments verify that the investigated approach efficiently as well as effectively increases a variational free energy objective without requiring any additional analytical steps

Advances in Control of Onion Thrips (Thysanoptera: Thripidae) in Cabbage

Onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), feeding injury results in discoloration and a rough texture on cabbage, Brassica oleracea capitata (L.), leaves, and damage may occur deep inside the head. It has become a key pest of cabbage in the United States and many other countries. Previous studies have indicated poor control using insecticides. The present study identified imidacloprid drenches and sprays of acetamiprid, dimethoate, spinosad, and imidacloprid as insecticides that performed better than the industry standard, lambda-cyhalothrin. However, additional tests with foliar sprays of dimethoate and acetamiprid indicated there was not an ideal crop stage (precupping, cupping, or postcupping) at which either insecticide could be applied for reliable control of T. tabaci, possibly because of multiple flights of thrips into the crop or the asynchrony of flights and susceptible crop stages. In tests in a commercial field, a soil drench of imidacloprid 4 wk after transplanting reduced the number of damaged leaves in the head by 32%, whereas five sprays of acetamiprid reduced damage by 51%. Combining both insecticide regimes reduced damage by 85%, but resulted in a very costly management program. Cabbage varieties varied considerably in susceptibility with some having negligible thrips injury, regardless of being treated with an insecticide. Planting date affected susceptibility of cabbage to some degree, but not as much as other tactics. Overall, these studies indicate that increased emphasis should be placed on breeding cabbages to be resistant to T. tabaci as the foundation for its managemen

Cultural Resources Survey for the City of Florence Municipal Facilities Complex Project, Williamson County, Texas

On behalf of the City of Florence, Texas, SWCA Environmental Consultants (SWCA) conducted an intensive cultural resources survey of the proposed City of Florence Municipal Facilities Complex (Project) in Williamson County, Texas. The 1.2-acre parcel scheduled for redevelopment is located on land owned and managed by the City of Florence, a political subdivision of the state of Texas; therefore, the Project requires compliance with the Antiquities Code of Texas (ACT). In addition, the project will receive federal funds from the U.S. Department of Agriculture (USDA); therefore, the work was conducted to comply with the National Historic Preservation Act (NHPA). This cultural resources investigation was conducted under ACT Permit No. 9142. On behalf of the USDA, SWCA has also issued engagement letters to the six Tribes identified by the U.S. Department of Housing and Urban Development (HUD) as having overlapping interest with the Project area. To date, SWCA has yet to receive comments from the identified Tribes. The parcel on which the Project is proposed contains four extant buildings/structures: the Florence City Hall, the Chamber of Commerce, a large Veteran’s Memorial, and a thrift store. As part of the Project, all but the Veteran’s Memorial are scheduled for demolition and a larger municipal complex is expected to be constructed in their stead. Impacts are expected to include widespread surficial modifications with deeper impacts in locations of foundations and utilities. The cultural resources investigation consisted of a background and historical map review followed by intensive pedestrian survey augmented by shovel testing conducted by an archaeologist, and an assessment of the extant buildings conducted by an architectural historian. SWCA’s background review determined that there are no known cultural resources within the Project area. Additionally, the historical map review identified only two potential historical structures within the Project area. During field investigations on September 25 and November 5, 2019, SWCA confirmed that the four extant buildings/structures on the subject property are of modern construction, and therefore, are not eligible for the National Register of Historic Places (NRHP) and are not considered eligible for designation as a State Antiquities Landmark (SAL). In addition, the two potential historical structures identified during the historical map review within the Project area are not extant. SWCA excavated a total of 12 shovel tests within the Project area, three of which were positive for cultural materials. The cultural material includes an axe head, an unidentifiable metal fragment, a round nail, and a white-bodied earthenware sherd. The artifacts found within the shovel tests cannot be securely identified as being from a historic origin and were found with, or near the same depth as, modern plastic fragments. Furthermore, the soils within the Project area exhibited a high degree of disturbance due to decades of construction, landscaping, and tree planting, as well as buried utilities. Due to the lack of soil integrity and the lack of artifacts that can securely be attributed to a historic origin, SWCA finds the three positive shovel tests as constituting an isolated find and does not rise to the level of an archaeological site. As such, the isolated finds do not meet the criteria for NRHP listing nor SAL designation. No other cultural resources were identified within the Project area. In accordance with the ACT and with Section 106 of the NHPA (36 Code of Federal Regulations [CFR] 800.4 (b)(1)), SWCA has made a reasonable and good faith effort to identify historic properties within the area of potential effects. SWCA recommends a finding of No Historic Properties Affected per 36 CFR 800. 5(b) and no further archaeological investigation of the current Project area is recommended. No artifacts or samples were collected during this survey. All survey-related documentation will be curated at the Center for Archaeological Studies, Texas State University, San Marcos, Texas

AS-777-14 Resolution on Proposal to Establish the Strawberry Sustainability Research and Education Center

That the Academic Senate endorses the establishment of the Strawberry Sustainability Research Education Center

NS-NS fluxes in Hitchin's generalized geometry

The standard notion of NS-NS 3-form flux is lifted to Hitchin's generalized geometry. This generalized flux is given in terms of an integral of a modified Nijenhuis operator over a generalized 3-cycle. Explicitly evaluating the generalized flux in a number of familiar examples, we show that it can compute three-form flux, geometric flux and non-geometric Q-flux. Finally, a generalized connection that acts on generalized vectors is described and we show how the flux arises from it.Comment: 21 pages, 1 figure; v3: minor change

Surprisingly Little O VI Emission Arises in the Local Bubble

This paper reports the first study of the O VI resonance line emission (1032, 1038 Angstroms) originating in the Local Bubble (or Local Hot Bubble) surrounding the solar neighborhood. In spite of the fact that O VI absorption within the Local Bubble has been observed, no resonance line emission was detected during our 230 ksec Far Ultraviolet Spectroscopic Explorer observation toward a ``shadowing'' filament in the southern Galactic hemisphere. As a result, tight 2 sigma upper limits are set on the intensities in the 1032 and 1038 Angstrom emission lines: 500 and 530 photons cm^{-2} s^{-1} sr^{-1}, respectively. These values place strict constraints on models and simulations. They suggest that the O VI-bearing plasma and the X-ray emissive plasma reside in distinct regions of the Local Bubble and are not mixed in a single plasma, whether in equilibrium with T ~ 10^6 K or highly overionized with T ~ 4 to 6 x 10^4 K. If the line of sight intersects multiple cool clouds within the Local Bubble, then the results also suggest that hot/cool transition zones differ from those in current simulations. With these intensity upper limits, we establish limits on the electron density, thermal pressure, pathlength, and cooling timescale of the O VI-bearing plasma in the Local Bubble. Furthermore, the intensity of O VI resonance line doublet photons originating in the Galactic thick disk and halo is determined (3500 to 4300 photons cm^{-2} s^{-1} sr^{-1}), and the electron density, thermal pressure, pathlength, and cooling timescale of its O VI-bearing plasma are calculated. The pressure in the Galactic halo's O VI-bearing plasma (3100 to 3800 K cm^{-3}) agrees with model predictions for the total pressure in the thick disk/lower halo. We also report the results of searches for other emission lines.Comment: accepted by ApJ, scheduled for May 2003, replacement astro-ph submission corrects typos and grammatical errors in original versio