Wide-range logarithmic radiometer for measuring high temperatures

Filter radiometer utilizing photomultiplier circuit, in which a direct-coupled amplifier varies dynode voltage to maintain constant anode current, measures rapid variations of temperature of white-hot charred body at 2000 K to 3000 K

A preliminary study of air-pollution measurement by active remote-sensing techniques

Air pollutants are identified, and the needs for their measurement from satellites and aircraft are discussed. An assessment is made of the properties of these pollutants and of the normal atmosphere, including interactions with light of various wavelengths and the resulting effects on transmission and scattering of optical signals. The possible methods for active remote measurement are described; the relative performance capabilities of double-ended and single-ended systems are compared qualitatively; and the capabilities of the several single-ended or backscattering techniques are compared quantitatively. The differential-absorption lidar (DIAL) technique is shown to be superior to the other backscattering techniques. The lidar system parameters and their relationships to the environmental factors and the properties of pollutants are examined in detail. A computer program that models both the atmosphere (including pollutants) and the lidar system is described. The performance capabilities of present and future lidar components are assessed, and projections are made of prospective measurement capabilities for future lidar systems. Following a discussion of some important operational factors that affect both the design and measurement capabilities of airborne and satellite-based lidar systems, the extensive analytical results obtained through more than 1000 individual cases analyzed with the aid of the computer program are summarized and discussed. The conclusions are presented. Recommendations are also made for additional studies to investigate cases that could not be explored adequately during this study

Obstetrical outcome in women with congenital uterine anomalies

Background: Congenital uterine anomalies are associated with higher incidence of reproductive failure and adverse obstetrical outcomes. The association of congenital anomalies and early pregnancy loss has been well established but its adverse effect on late pregnancy in from of malpresentation, preterm deliveries has not yet been elaborated. Thus, this study aims to summarize the clinical characteristics and perinatal outcome of pregnancy in women with congenital uterine anomalies.Methods: This is a retrospective study evaluating the obstetric outcomes of 32 patients with congenital abnormalities.Results: Among 32 women with uterine anomalies 6 delivered preterm, 16 malpresentations were seen (50%).Infants born to mothers having congenital uterine anomalies were of lower birth weight. Therefore, it can be concluded the women with congenital uterine anomalies had a higher risk of malpresentation and preterm deliveries. They also had a higher incidence of small for gestational age neonates.Conclusions: Presence of congenital uterine anomalies has adverse effect on obstetrical outcome. This knowledge warrants the need for a larger case control study to extrapolate these findings to the general population and also to recommend the need for universal Prenatal Screening for uterine anomalies so as to improve the obstetrical outcome in patients with uterine anomalies

Chronology of KSC and KSC Related Events for 1997

This document is intended to serve as a record of KSC events and is a reference source for historians and other researchers. Arrangement is by day and month and individual articles are attributed to published sources. Materials were researched and described by the KSC Library Archivist for KSC Library Services Contractor, Sherikon Space Systems, Inc

Spontaneous closure of the hymen during term pregnancy

The hymen is a thin fold of mucous membrane; partially closing the external vaginal opening.1It is composed mainly of elastic, collagenous connective tissue and covered on its both surfaces by stratified squamous epithelium. At pregnancy, the epithelium of hymen becomes very thick and rich in glycogen, which may lead to spontaneous closure. We aim to report a rare case of spontaneous closure of hymen in a 23-year old primigravida in labour with no prior history of menstrual problems or problems during intercourse. Two conditions can cause the secondary closure of the hymen: following previous scarring and in pregnancy. In pregnancy, it could be spontaneous closure due to increase glycogen content of the hymen or due to extensive scarring as seen in previous hymenal surgeries. Spontaneous closure of hymen during pregnancy though very rare can occur. Along with extensive scarring, prolonged abstinence and oestrogenic effect on hymen, gonococcal infection can also cause sponatenous closure of hymen during pregnancy.

Credit - Tool or Trap?

Your attitudes toward credit probably affect how you buy, what you buy and when you buy. Use of credit may come natural to you- the charge account at the store, the deferred dental bill or cattle loan. Or, for various reasons you may be wary of credit

Consumer Credit - Using It Wisely

For any family, credit can be a tool, trap or just handy to have around. We talked about this in the February issue of Iowa Farm Science. We suggested factors to consider in combining credit for family living (consumer credit) and for farm operation (production credit). We pointed out ways in which wise use of credit could increase farm income, family living levels and over-all family satisfaction

Production Credit - Friend of Foe?

Most farm families are familiar with production credit. But there are still problems of when to borrow, how much, from whom and for what purpose. Here are some guideposts you may find useful in making decisions

The immature stages and biology of two Xenapates species in West Africa (Hymenoptera, Tenthredinidae)

The immature stages and host plants of Xenapates Kirby, 1882 were hitherto unknown. We describe the larvae, prepupae and pupae of X. braunsi (Konow, 1896) and X. gaullei (Konow, 1896), and record observations on aspects of their biology. The relationship of Xenapates to other taxa currently placed in the Allantinae and Blennocampinae of the Tenthredinidae remains unclear. Most larval characters of Xenapates resemble those described for West Palaearctic Allantini (Allantinae) and some Blennocampinae, but unique amongst exophytic larvae of Tenthredinoidea is the complete absence of cuticular appendages on the dorsum of the trunk in the two Xenapates species studied. The setose outer surface of the abdominal prolegs of Xenapates, and the presence of a mesal ridge only on the left mandible, are character states that have not so far been recorded in other genera currently placed in the Allantinae or Blennocampinae. Larval host plants of X. braunsi are Digitaria horizontalis, Pennisetum purpureum, Setaria barbata and Zea mays (all Poaceae). X. gaullei larvae feed on two Commelina species (Commelinaceae). Larvae of both species are easy bleeders