A metallurgical evaluation of the Mi Vida prospect: A mixed copper sulfide-carbonate ore body, Sells, Pima County, Arizona

A copper-prospect in south-central Arizona has been evaluated on a metallurgical basis. Primary chalcocite and secondary covellite, plus the copper oxides malachite and brochantite, constitute the economic mineralization. The deposit outcrops as a steeply dipping (70°SW), intensely brecciated, copper-bearing quartz vein with discontinuous lenticular ore shoots. Acid leaching techniques alone and in conjunction with froth flotation utilizing four copper oxide specific collectors were used to evaluate the amenability of this ore to processing. Direct acid leaching was examined and found to be ineffective. Removal of the chalcocite by froth flotation with xanthate was easy and gave better results to subsequent leaching steps; the oxide phases of the ore proved more difficult to concentrate. Copper oxide recovery was investigated using the following collectors and methods: 1) fatty acids (carboxylic acids); 2) potassium octyl hydroxamate; 3) monoalky ldithiocarbamates ; 4) sulphidation with NaHS plus xanthate collector; and 5) froth flotation plus acid leaching of tails. The carboxylic acid collectors produced extremely low recoveries. Potassium octyl hydroxamate and the monoalkyldithiocarbamate collectors gave recoveries of 93 pet or better. The hydroxamate is too expensive to utilize as a collector, while the carbamate is cheaper but not available in commercial quantities. Sulphidation with NaHS proved effective but hard to control without instrumentation; recoveries were typically in the 85 pet to 93 pet range. Froth flotation followed by acid leaching yielded recoveries up to 97 pet with moderate cost. A proposed flowsheet would call for chalcocite flotation with potassium amyl xanthate (KAX) at a grind of -150 µm (-100 mesh) followed by sulphidation with NaHS and copper oxide flotation with KAX. Flotation tailings would then be given an agitation acid leach to recover the remaining copper values --Abstract, pages ii-iii

Cases of Contingent STEM Faculty Who Practice Critical Pedagogies with/in the Neoliberal University

An increasingly neoliberal university means diminishing resources and labor security for those located in the lowest echelon, particularly those engaged in critical/radical/activist projects. The purpose of this study was to generate knowledge in an effort to sustain and advance critical pedagogical practices in college teaching. This study focused principally on the knowledge and insights of contingent STEM faculty who practice critical pedagogies in the neoliberal conditions of public universities. Utilizing critical and pragmatic perspectives, I explored both the ingenuity and practicality of the participants’ praxis as well as examined the structural machinations of neoliberal capitalism within their teaching and learning environments. I utilized a collective case study design to complete this study. The data sources were interviews, classroom observations, artifacts, and a questionnaire. The participants were four contingent STEM faculty at public universities in the state of Oregon. The results of the study are organized into four case reports, which are synthesized into recommendations for practice and future research. Practice recommendations consider the interests and goals of institutional leaders, faculty developers, and critical pedagogues. Research recommendations consider next steps for innovation in critical pedagogical practice and organizational change

Developing Formative Assessment Practices in Instruction: Recommendations from a Meta-Aggregation

Secondary mathematics teachers’ use of formative assessments have shown promise for developing models of their students’ mathematical thinking and informing their instruction. While the complexities of secondary mathematics teachers’ formative assessment practices are often captured in qualitative research, there is a critical need for synthesized recommendations to connect formative assessment theory to practice. In a meta-aggregation synthesis from 11 qualitative manuscripts, we explored in-service teachers’ formative assessment practices in US secondary mathematics classrooms. Our synthesis led to nine recommendations for in-service secondary mathematics teachers throughout three phases of their instruction: (a) prior to gathering evidence of student thinking; (b) while gathering, supporting, and responding to student thinking; and (c) reflecting on formative assessment practices. We close with connections to equitable teaching practices in secondary mathematics classrooms

Psychotherapist Understanding of Genital Self-Mutilation Amongst Male to Female Transsexuals

Self-mutilation of the genitals is a complex phenomenon that can provoke strong countertransference reactions amongst mental health clinician. Transsexuals who engage in self-inflicted mutilation of the genitals face a potentially increased risk of alienation from healthcare providers due to marginalization and lack of understanding by treating clinicians. Frequently, assumptions are made regarding the motivation for the behavior that fails to take into account the complex interplay between contributing psychological, social, and environmental forces. This qualitative study explored the experience of four psychotherapists who had encountered the behavior in their work with transsexual clients in order to gain a more accurate picture of how psychotherapists understand the phenomenon. Participating psychotherapists engaged in semi-structured interviews which were transcribed and analyzed utilizing an interpretative phenomenological theoretical framework. Data analysis revealed nine emergent essential themes. These themes were mapped onto the domains of therapist activity inherent to the interaction with the phenomenon. Within the domain of conceptualization, therapists understood the manifestation of the behavior as connected to the client experience of psychological pressure, constraints on the client sense of agency, and attempts to protect the self of the client through action. Within the domain of treatment, concepts shaping the interventions of the therapists included affirming female gender identity, mediating the vulnerability associated with the client coming out process, and using safety planning to promote the client\u27s self-reflective capacity. Within the domain of the impact of the phenomenon on the self of the therapist, relevant themes included the therapist experience of countertransference as a parallel process to the client\u27s experience, the therapist desire to engage in competent practice in the context of emotional stress, and active coping on the part of the therapist to manage personal and professional challenges associated with treating clients who engaged in genital self-mutilation. The author concludes the investigation with relevant clinical recommendations to assist clinical social workers and psychotherapists in competently assessing and intervening with this behavior amongst this population

Local and Bulk Measurements in Novel Magnetically Frustrated Materials:

Thesis advisor: Michael J. GrafQuantum spin liquids (QSL)’s have been one of the most hotly researched areas ofcondensed matter physics for the past decade. Yet, science has yet to unconditionally identify any one system as harboring a QSL state. This is because QSL’s are largely defined as systems whose electronic spins do not undergo a thermodynamic transition as T→0. Quantum spin liquids remain fully paramagnetic, including dynamical spin fluctuations, at T=0. As a result, distinguishing a QSL system from a conventionally disordered system remains an outstanding challenge. If a system spin freezes or magnetically orders, it cannot be a QSL. In this thesis I present published experiments I have performed on QSL candidate materials. By using muon spin rotation (μSR) and AC magnetic susceptibility I have evaluated the ground states of several candidates for the absence of long-range magnetic disorder and low-temperature spin-fluctuations. For the systems which order or spin-freeze, my research provided key knowledge to the field of frustrated magnetism. The systems I studied are as follows: The geometrically frustrated systems NaYbO2 and LiYbO2; the Kitaev honeycomb systems Cu2IrO3 and Ag3LiIr2O6; and the metallic kagome system KV3Sb5. Each of these systems brought new physics to the field of frustrated magnetism. NaYbO2 is a promising QSL candidate. LiYbO2 harbors an usual form of spiral incommensurate order that has a staggered transition. Cu2IrO3 has charge state disorder that results in a magnetically inhonogenious state. Ag3LiIr2O6 illustrates the role structural disorder plays in disguising long-range magnetic order. And finally, KV3Sb5 isn’t conventionally magnetic at all; our measurements ruled out ionic magnetism and uncovered a type-II superconductor. Our measurements on KV3Sb5 stimulated further research into KV3Sb5 and it’s unconventional electronic states.Thesis (PhD) — Boston College, 2022.Submitted to: Boston College. Graduate School of Arts and Sciences.Discipline: Physics

Four in Ten Adults with Disabilities Experienced Unfair Treatment in Health Care Settings, at Work, or When Applying for Public Benefits in 2022

In this brief, we used December 2022 data from a nationally representative survey of adults ages 18 to 64 to examine rates at which adults with and without disabilities reported they were treated or judged unfairly in the past year in three settings: at doctors' offices, clinics, or hospitals; at work; and when applying for public benefits. We also examined the impact of such treatment on their well-being.Despite important federal antidiscrimination protections, people with disabilities experience unfair treatment in health care settings, workplaces, and when applying for public benefits. Understanding and addressing these experiences is necessary to ensure that people with disabilities have equitable access to health care, employment opportunities, and economic support essential for meeting basic needs

Hazing: What Ohio High School Teachers, Coaches and Administrators Need to Know

Once thought to be primarily an issue of concern for university fraternities and sororities, hazing has emerged as a disturbing trend with an increase in the number of incidents involving high school student athletes. High school coaches, athletic administrators, and teachers must understand that initiation rites of sport teams can sometimes spiral out of control with grave legal and financial consequences for student athletes and school officials. The purposes of this article are to: Define hazing and review the history of anti-hazing legislation in the United States of America. Describe hazing laws in the State of Ohio. Review current research related to hazing specifically at the high school level. Discuss proactive strategies coaches, administrators, students, teachers, parents, and the community can use to prevent the harmful practices of hazing

State and Local Coverage Changes under Full Implementation of the Affordable Care Act

The Affordable Care Act (ACA) of 2010 includes a number of new policies intended to substantially reduce the number of people without health insurance. Key provisions to be implemented in 2014 include new health insurance exchanges, subsidies for coverage in those exchanges, health insurance market reforms, and an individual mandate. The ACA also includes an expansion of Medicaid coverage to individuals with incomes up to 138 percent of the Federal Poverty Level ($15,856 for an individual or$26,951 for family of three in 2013). The Medicaid expansion under the ACA became a state option following the Supreme Court ruling in June of 2012. At this point, it is not clear how many states will elect to expand Medicaid coverage. If all states were to do so, enrollment in Medicaid is projected to increase nationwide by about 18.1 million and the uninsured would decline by 23.1 million. This brief provides highlights from new state and sub-state estimates of how the number and composition of individuals enrolled in Medicaid/CHIP would change with full implementation of the ACA, including the Medicaid expansion (see kff.org/zooming-in-ACA). These estimates provide more detail on the projected coverage changes under the ACA at the state level than in prior research. They also provide new information on the expected coverage changes resulting from the ACA at the local level in all states. This analysis demonstrates that there is substantial variation across and within states in the magnitude and composition of the population that is projected to gain Medicaid coverage under the ACA. These estimates also provide guidance on the areas that are likely to experience the largest declines in the uninsured and where the residual uninsured are likely to be concentrated