On some Hemiptera from North Dakota

http://deepblue.lib.umich.edu/bitstream/2027.42/56554/1/OP115.pd

The Yanks Are Striking: Kern County, the 1921 Oil Strike and the Discourse on Americanism

In the fall of 1921 oil workers of the San Joaquin Valley faced a post-war economic slump, wage cuts across the board and an increasingly hostile attitude of oil operators towards consultation with the federal government on labor relations. They voted to strike, and the next day eight thousand workers walked off the fields. Strikers crafted an image of “patriotic unionism,” underpinned by a faith in the federal government and the ideology of the American Legion. The strike did not end in gruesome class warfare like had been seen months earlier in the coal mines of West Virginia, but rather in ideological confusion and despair. The oil workers movement never fully embraced a class identity; instead it embraced the burgeoning conservative identity of Americanism. This effectively hobbled the growth of the movement. Upon the strike’s conclusion there was no mass pull to the left on the part of oil workers in the San Joaquin Valley, despite the fact that their movement’s design and identity had gotten them nowhere. On the contrary a portion of workers and supporters of the strike turned to the nativism of the Klan. Overall this project looks to complicate the narrative of “us vs. them” in labor history by analyzing workers’ identities, and also looks to contribute to the ever-evolving discourse on how historians should track American conservatism as a social force

Exponential Temperature Dependence of Penetration Depth in Single Crystal MgB_2

The temperature dependence of the London penetration depth,lambda(T), was measured in both single crystal and polycrystalline MgB_2 samples by a high-resolution, radio frequency technique. A clear exponential temperature dependence of lambda(T) was observed at low temperature, indicating s-wave pairing. A BCS fit to the lowest temperature data gives an in-plane energy gap Delta of 2.6\pm0.2 meV (2\Delta/T_c=1.5\pm0.1), which is significantly smaller than the standard BCS weak coupling value of 3.5. We find that the data are best described by a two-gap model.Comment: Minor corrections added, as per published articl

Phenomenology of the normal state in-plane transport properties of high-TcT_c cuprates

In this article, I review progress towards an understanding of the normal state (in-plane) transport properties of high-$T_c$ cuprates in the light of recent developments in both spectroscopic and transport measurement techniques. Against a backdrop of mounting evidence for anisotropic single-particle lifetimes in cuprate superconductors, new results have emerged that advocate similar momentum dependence in the transport decay rate $\Gamma$({\bf k}). In addition, enhancement of the energy scale (up to the bare bandwidth) over which spectroscopic information on the quasiparticle response can be obtained has led to the discovery of new, unforeseen features that surprisingly, may have a significant bearing on the transport properties at the dc limit. With these two key developments in mind, I consider here whether all the ingredients necessary for a complete phenomenological description of the anomalous normal state transport properties of high-$T_c$ cuprates are now in place.Comment: 31 pages, 10 figure

Irradiation-induced confinement in a quasi-one-dimensional metal

The anisotropic resistivity of PrBa$_2$Cu$_4$O$_8$ has been measured as a function of electron irradiation fluence. Localization effects are observed for extremely small amounts of disorder corresponding to electron mean-free-paths of order 100 unit cells. Estimates of the localization corrections suggest that this anomalous localization threshold heralds a crossover to a ground state with pronounced one-dimensional character in which conduction electrons become confined to a small cluster of chains.Comment: 4 pages, 4 figure

A Study of Police Officers with Military Service Backgrounds Compared to Police Officers without Military Service: Can Military Veterans Interact and Properly Engage the Public?

The purpose of this research was to determine if police officers with military experience are less likely to receive civilian complaints for use of force and unprofessional behavior than police officers without military experience. The research consisted of eight research questions that the dissertation attempted to answer. From these eight research questions, three hypotheses were established. To facilitate the research a mixed-methods approach was utilized to compare whether police officers with military experience accrued more or less civilian complaints than police officers without military experience. The initial portion of the dissertation utilized quantitative data collected from three police departments in the state of Florida to compare the number of civilian complaints filed against police officers between the years 2014-2016. The qualitative portion of the research consisted of data which was gathered from twenty in-person interviews and telephonic interviews. The initial interviews consisted of a cohort of ten police supervisors having personal military experience, including combat deployment experience. A second cohort of ten police supervisors was also interviewed. These supervisors did not have military experience or combat deployment experience however, they had experience with recruiting, training, or supervising police officers with military experience. The qualitative information provided supervisor’s perceptions of police officers with military experience compared to police officers who did not have military experience with regard to overall performance in their role as police officers. The qualitative data served to provide additional insight beyond the quantitative data of civilian complaints regarding the excessive use of force and complaints concerning unprofessional behavior filed against police officers with and without military experience. Lastly, a second qualitative portion utilized a survey using the service of Survey Monkey to query police officers who are military veterans. The Survey Monkey responses determined if their military service and combat experience influenced their law enforcement capabilities and civilian interactions. The quantitative research concluded that police officers with military experience are less likely to have civilian complaints filed against them for unprofessional behavior than police officers who do not have military experience. The qualitative data provided a positive perception of police officers with military experience regarding their ability to serve as police officers and interact with the community. Lastly, the qualitative data as provided by police officers who have military experience via Survey Monkey concluded that military experience was beneficial to their service as police officers. There are significant policy implications which may be garnered from this dissertation. Many agencies, including the federal government, allocate money for recruiting military veterans. Numerous police departments waive certain requirements and give preference points to military veterans. Based on the findings in this research, it is recommended that police agencies continue to seek military veterans to hire as police officers and in difficult recruiting areas offer incentives to those with military experience to become police officers

Development of a Generalized Multicomponent Ion Exchange Reaction Equilibrium Model

A generalized multicomponent ion exchange reaction equilibrium model is developed in this work. The equilibrium model calculates the interfacial concentrations of ions on an ion exchange resin and operates independently of the fOffil of the resin. The model is shown to be numerically stable. A survey of non-ideal generalized multicomponent equilibrium models available in the literature is also included. Recommendations about implementing non-ideal reaction equilibria in an ion exchange column model are presented

The 3D printing of a polymeric electrochemical cell body and its characterisation

An undivided flow cell was designed and constructed using additive manufacturing technology and its mass transport characteristics were evaluated using the reduction of ferricyanide, hexacyanoferrate (III) ions at a nickel surface. The dimensionless mass transfer correlation Sh = aRebScdLee was obtained using the convective-diffusion limiting current observed in linear sweep voltammetry; this correlation compared closely with that reported in the literature from traditionally machined plane parallel rectangular flow channel reactors. The ability of 3D printer technology, aided by computational graphics, to rapidly and conveniently design, manufacture and re-design the geometrical characteristics of the flow cell ishighlighted