Nested calderas of the northern Kawich Range, central Nevada

Five calderas were discovered in the northern Kawich Range, central Nevada. These calderas are filled with intracaldera rhyolite tuffs and caldera collapse breccias. Based on 40Ar/39Ar dating of sanidine and crosscutting relations, the calderas erupted in the following order from oldest to youngest: Clifford Spring (23.67 +/- 0.09 Ma), Tobe Spring (22.77 +/- 0.07 Ma), Cow Canyon (22.78 +/- 0.07 Ma), Bellehelen (22.87 +/- 0.16 Ma), and Warm Springs. Welded tuff lithologies of collapse breccia blocks show that these calderas represent separate events and not a single caldera with piecemeal collapse. Geochemistry shows that the five intracaldera tuffs are chemically similar and therefore cogenetic. The five tuffs are also similar to the Pahranagat Formation and the Pyramid Spring tuff. To explain the eruption of at least seven tuffs of very similar chemistry over a period of 1.06 m.y, a new model for magma production in northern Nye County during the Tertiary ignimbrite flare-up is presented. This model calls for a heat surge producing greater than 50 % partial melting of the lower crust producing rhyolitic melt batches of similar chemistry. Cooling of the crust due to these voluminous eruptions resulted in the suppression of the ignimbrite flare up

Student Recital: Elisabeth Honn, Soprano

Kemp Recital Hall Saturday Evening April 24, 1993 6:00p.m

Improved Distributed Wyner-Ziv Video Coding Based On Reed Solomon Error Correction Scheme And Frame Estimation For Wireless Transmission

Recent years have witnessed the increase in demand for fast, efficient, and high quality communication of multimedia applications through the wireless and wired transmission. This has opened up the research area in distributed video coding (DVC) to flourish. The objectives of this thesis are to evaluate efficiency of implementation of different channel encoding schemes in DVC in protecting the source data in channel impairment environment and also reduce the number of frames transmission from the encoder. Most recently, the low density parity check codes (LDPC) are chosen to be the forward error correction technique to encode the Wyner-Ziv frames in DVC as the LDPC has more superior error correction performance than the turbo codes. However, the LDPC involves complicated encoding and decoding algorithm. In this thesis, the LDPC is replaced with the Reed Solomon (RS) codes to encode the Wyner-Ziv frames. Performance of RS codes in protecting source message is compared with the LDPC codes. As the RS codes involve less complicated encoding and decoding algorithm, the overall system time is reduced and the output is obtained in a shorter time. Based on the experiment results, the proposed model achieves a reduction of about 9.3% to 9.4 % in processing time, depending on the input video sequence, with acceptable quality of output video sequence. The RS codes are known for their capabilities to correct burst errors, which are common in fading channel. The second part of this thesis is the reduction of the number of frames transmission from the encoder. Only certain frames in the group of picture are transmitted from the encoder to reduce the overall transmission time of the system. The frames that are not transmitted shall be estimated at the decoder so that there will be a complete set of the group of picture at the decoder for the output video reconstruction. Based on the experiment results, the proposed model seems more effective and efficient as output video sequence could be obtained in a shorter time. The proposed model achieves a reduction of about 4.0% to 4.7 % in processing time, depending on the input video sequence. Moreover, the estimated output frames of the proposed model are also with acceptable quality as compared to the original input frames

Rules for accounting, October 1, 1911

A new system of agency accounting will take effect October 1st, and the instructions contained in this book applying thereto are for the use of Wells Fargo & Company\u27s employes. In view of the important changes that have been made, it is expected that all employes will thoroughly familiarize themselves with these rules, so errors in billing, reporting, etc., may be obviated and the transaction of the business carried on with expedition

Petrogenesis of the Linked River Mountains Volcanic Section and Wilson Ridge Pluton

The River Mountains (RM) volcanic suite and Wilson Ridge pluton (WRP), in the northern Colorado River extensional corridor of southern Nevada and northwestern Arizona, provide an ideal opportunity to investigate one of the most fundamental questions in igneous petrology: Do volcanic rocks erupt from subjacent plutons and do plutons vent to form volcanic fields? The RM volcanic suite (14.47± 0.26 to 12.66 ± 0.54 Ma; uncertainties are 2sigma) consists of a stack of andesite and rhyolite sills beneath a stratovolcano that primarily erupted dacite with lesser volumes of basalt and rhyolite. This volcanic suite is cored by a multiphase quartz monzonite stock. The WRP (15.18 ± 0.31 to 12.66 ± 0.54 Ma) consists of an early hypabyssal suite, monzodiorite and diorite intrusions, main phase quartz monzonite of the Teakettle Pass suite, and bimodal late stage dikes. Previous mapping linked the now faulted and detached (by 20 km) volcanic and plutonic suites. The current study establishes a more explicit link between the RM volcanic suite and WRP by using new 206Pb/238U zircon ages and a more complete geochemical data set. The major conclusions of this new work are that: 1) the WRP and the RM represent a single cogenetic igneous system and; 2) that multiple types of data (lithologic, geochronologic, and geochemical) must be used to identify cogenetic volcanic and plutonic suites. An important implication of this work is that other volcanic fields and plutons closely related in age and chemistry may represent single systems with shared magmatic histories

Age and Functional Outcomes Post-Neurologic Insult in Patients Attending Inpatient Rehabilitation

Introduction Neurologic insults such as strokes and traumatic brain injuries (TBI) affect over 1 million Americans every year. The lack of current knowledge informing accurate prognoses causes victims and their loved ones distress, and is a focus of much research. The purpose of this study was to determine whether patient age at time of insult could predict change in functional outcomes during inpatient rehabilitation. Methods Subjects were patients of an inpatient rehabilitation facility (IRF) post-stroke or TBI. The Functional Independence Measure (FIM) assessed functional independence and cognitive status at admission and discharge from the IRF. The Montebello Rehabilitation Factor Score (MRFS) incorporated admission and discharge FIM scores to calculate each subject’s change in cognitive and motor functional independence. Descriptive statistics and linear regression analyses were calculated using SPSS v24. Results Data from twenty subjects were included in the study (66.5 ± 18.0 years; n=7 female). The overall regression model was trending towards statistical significance, where lower age predicted cognitive MRFS (F = 3.714, p = 0.070, β = -0.414, R2 = 0.171) and motor MRFS (F = 25.008, p \u3c 0.001 , β = -0.763, R2 = 0.581) at discharge from the IRF. Conclusions Our findings are consistent with previous research demonstrating that neurologic insult at a younger age is correlated with better functional outcomes from that incident. Providers and therapists should use this information in educating patients and their support network about the patient’s possible prognosis