Holding On To History

When I searched for the story of Georges Lieber, the very man whose drive to resist inspired the concept for this essay, I could not find it. The only trace of him was his record on the Yad Vashem database which merely states that he was a student and that he was transported from Lyon, France to Auschwitz in 1944. His story, along with much of Holocaust history, remains unknown or misunderstood for many people, both from my generation and those before us. As a long-term student of history and an aspiring educator, I have chosen to resist the sliding grip that people have on history and hoist it up before the lives and lessons in it are lost

China’s WAPI Policy: Security Measure or Trade Protectionism?

In December of 2003, the Chinese government announced that all WLAN equipment sold in China must conform to a propriety standard called WAPI, rather than the internationally accepted Wi-Fi standard. Moreover, for foreign firms to gain access to WAPI technology, they would need to partner with one of two-dozen Chinese firms designated by the Chinese government. The policy ostensibly grew out of security concerns regarding Wi-Fi, although it is unclear whether WAPI is more secure. Beijing has now indefinitely postponed the implementation of this policy, but WAPI is still relevant. This iBrief argues that WAPI is illustrative of many Chinese technical barriers to trade in the high-tech sector, and evaluates this policy\u27s consistency with China\u27s WTO obligations

China’s WAPI Policy: Security Measure or Trade Protectionism?

In December of 2003, the Chinese government announced that all WLAN equipment sold in China must conform to a propriety standard called WAPI, rather than the internationally accepted Wi-Fi standard. Moreover, for foreign firms to gain access to WAPI technology, they would need to partner with one of two-dozen Chinese firms designated by the Chinese government. The policy ostensibly grew out of security concerns regarding Wi-Fi, although it is unclear whether WAPI is more secure. Beijing has now indefinitely postponed the implementation of this policy, but WAPI is still relevant. This iBrief argues that WAPI is illustrative of many Chinese technical barriers to trade in the high-tech sector, and evaluates this policy\u27s consistency with China\u27s WTO obligations

Painful toxins acting at TRPV1

Many plant and animal toxins cause aversive behaviors in animals due to their pungent or unpleasant taste or because they cause other unpleasant senstations like pain. This article reviews the current state of knowledge of toxins that act at the TRPV1 ion channel, which is expressed in primary sensory neurons, is activated by multiple painful stimuli and is thought to be a key pain sensor and integrator. The recent finding that painful peptide 'vanillotoxin' components of tarantula toxin activate the TRPV1 ion channel to cause pain led us to survey what is known about toxins that act at this receptor. Toxins from plants, spiders and jellyfish are considered. Where possible, structural information about sites of interaction is considered in relation to toxin-binding sites on the Kv ion channel, for which more structural information exists. We discuss a developing model where toxin agonists such as resiniferatoxin and vanillotoxins are proposed to interact with a region of TRPV1 that is homologous to the 'voltage sensor' in the Kv1.2 ion channel, to open the channel and activate primary sensory nerves, causing pain

Atmospheric refraction effects on the Norris and Keck multiobject spectrographs

Large field spectrographs are severely influenced by atmospheric refraction. We discuss the effect of differential refraction across the field as well as the chromatic effects for the Norris spectrograph under construction for use at Palomar Observatory and for a similar spectrograph for the Keck telescope on Mauna Kea

Factors and Convergent Validity of the Pet Attachment and Life Impact Scale (PALS)

Human-animal interaction (HAI) provides benefits for humans. Emotional attachment to pets is a possible mechanism for benefits but there is no standard operationalization for “attachment to pets.” The study presented here (N = 651) uses a pet attachment measure based on qualitative research about benefits of pets. This measure, the Pet Attachment and Life Impact Scale (PALS), has four factors that measure Love, Regulation, Personal Growth, and Negative Impacts. We present exploratory factor analysis and confirmatory factor analysis of the instrument. We then examine convergent validity with four a priori derived measures of pet attachment (Anthropomorphism Scale, CENSHARE PAS, CABS, LAPS) and a social support scale. We provide evidence that having a current relationship with a pet is related to higher scores on the PALS than having a former pet relationship, evidencing that the PALS is a relational measure. Overall, females are more attached to pets than are males, and dog owners are most attached, followed by cat owners and owners of other pets

Toxic level hypergolic vapor detection sensor development

Development of an electrochemical sensor technology capable of PPB level hypergolic vapor sensing is reported. A portable instrument capable of meeting the design goals is described

Surface characterization of selected LDEF tray clamps

The surface characterization of chromic acid anodized 6061-T6 aluminum alloy tray clamps has shown differences in surface chemistry depending upon the position on the Long Duration Exposure Facility (LDEF). Water contact angle results showed no changes in wettability of the tray clamps. The overall surface topography of the control, trailing edge(E3) and leading edge(D9) samples was similar. The thickness of the aluminum oxide layer for all samples determined by Auger depth profiling was less than one micron. X-ray photoelectron spectroscopy (XPS) analysis of the tray clamps showed significant differences in the surface composition. Carbon and silicon containing compounds were the primary contaminants detected

Development and Persistence of 'Static' or 'Dead' Zones in Flows

Certain ceramic products are formed through extrusion processes, where a slurry is forced through small openings to form such products as filters. At the top is a large tank. The slurry is forced through the tank into an extrusion chamber, and then out through slots to form the finished product. [The slurry may be thought of as a mixture of clay (or other polymers), water, and other binders. There are many ways to model this mixture, some of which will be discussed in this report. For instance, the slurry can be modeled as a non-Newtonian fluid, a two-phase flow with liquid and solids, or a viscoelastic fluid. One can also model the mixture as an elongated particle suspension in water, where changes in the orientation of the particles could affect the flow.] After the extrusion process is complete, one finds that ‘dead zones’ of dry paste accumulate in two areas. Most prominently, they occur at the lower corners of the tank. They also occur on the floor of the extrusion chamber near the slots, both near and away from the walls. Since we will consider wall effects in the tank, for the extrusion chamber we consider only flow cells sufficiently far away from the walls. Then we may exploit the periodic nature of the device and consider only a single flow cell. The aim of this project is to determine the formation mechanisms of these dead zones, and see how they affect the overall flow