Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Natural Science Disciplines”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 613 records · Page 34Linked to original sources

[Drug addiction and freedom].

The author, in a historical and philosophical approach, analyses the concept of freedom as opposed to slavery. He also refers to the legal and social restrictions and studies the determinism and free will as the causes of human behaviour. Quoting Spinoza, the author states that man accepts the idea of freedom because he realizes the "how" of his options but ignores "why". Without the hypothesis of causality and determinism, there seems to have no science. Without freedom, there seems to be no anthropos man (Jimeno Valdez). The principles of anticausality, of nonreproducibility and of differentiation characterize the human freedom, but are contrary to the way science works. According to the social and political point of view, it was established that the State has the right to oblige and to violently limit freedom. Practically speaking, though, the State is violent just for being the State; the dominant groups are the government because they are and they have been violent. There is a need to limit and to discipline this right of the State of being violent within the dilemma of safety and freedom. By working, the slave avoided the whip. And by doing this, he encouraged the behaviour of the one who whipped him. The non-aversive attitudes limit the freedom in the modern world more and more for they also enchain our will, a rebellion becoming impossible. One is not granted the freedom; it shall be conquered and kept. Freedom, either as a concept or a phenomenon, is always relative. The concept of toxicomania or pharmacodependance is analysed according to the same perspective. The conclusion is that this is always more a problem of the society than of the individual, and this is how it has to be understood and treated. The present world is described as a millenial human culture specifically characterized by eight groups of phenomena: 1. Transport increased human mobility, reduced the relative dimensions of the earth, mixed peoples, compared cultures and created opportunities for conflicts; 2. The means of communication spread information surpassing their own capacity of being formed, they becoming traumatic; 3. The natural energies and electronic computing disturbed the work and comsumption market, man becoming insecure and disposable; 4. The industrial development produced a mass-culture and old time establishment became unreliable; 5. The demographic boom altered the age groups ratio which now presents an excess of children and grandparents with a relative lack of parents; 6. The diffusion of knowledge on human nature; 7. The religions emerged again, even the most primitive, persuading youngsters and governments; 8. The law, institutions and governments did not keep up with the rhythm of the changings and progress. The result was a generalized dissatisfaction.

Freedom↗

"A lab of one's own". The Balfour Biological Laboratory for Women at Cambridge University, 1884-1914.

The Balfour Biological Laboratory for Women was established at Cambridge University in 1884 to prepare the students of Newnham and Girton Colleges to sit the Natural Sciences Tripos, first opened to women in 1881. For thirty years, until its closure in 1914, the Balfour Laboratory served as the central conduit for biological instruction for the women of Cambridge, introducing them to the new program of experimental biology developed by the physiologist Michael Foster and the embryologist Francis Maitland Balfour. Directed by distinguished women graduates, the Balfour Laboratory became recognized as the leading center for women's biological instruction in Britain. Its significance, however, extends beyond its nominal status as a teaching laboratory. It provided university positions for able scientists who otherwise would not have been placed, offered advanced students the opportunity to engage in independent research, and, most important, formed the locus for the scientific subculture created by women at Cambridge to compensate for their exclusion from the social community of science. Drawing upon college and university archival records, this essay offers institutional, social, and biographical research that broadens our understanding of the experience of the first generation of women to pursue a higher education in the life sciences at one of the world's premier universities.

Biological Science Disciplines↗

Adsorption processes in spacecraft environmental control and life support systems.

The environmental control and life support system on a spacecraft maintains a safe and comfortable environment in which the crew can live and work by supplying oxygen and water and by removing carbon dioxide, water vapor, and trace contaminants from cabin air. Although open-loop systems have been used successfully in the past for short-duration missions, the economics of current and future long-duration missions in space will make nearly complete recycling of air and water imperative. A variety of operations will be necessary to achieve the goal of nearly complete recycling. These include separation and reduction of carbon dioxide, removal of trace gas-phase contaminants, recovery and purification of humidity condensate, purification and polishing of wastewater streams, and others. Several of these can be performed totally or in part by adsorption processes. These processes are good candidates to perform separations and purifications in space due to their gravity independence, high reliability, relative high energy efficiency, design flexibility, technological maturity, and regenerative nature. For these reasons, adsorption has historically played a key role in life support on U.S. and Russian piloted spacecraft. Among the life support applications that can be achieved through use of adsorption technology are removal of trace contaminants and carbon dioxide from cabin air and recovery of potable water from waste streams. In each of these cases adsorption technology has been selected for use onboard the International Space Station. The requirements, science, and hardware for these applications are discussed. Human space exploration may eventually lead to construction of planetary habitats. These habitats may provide additional opportunities for use of adsorption processes, such as control of greenhouse gas composition, and may have different resources available to them, such as gases present in the planetary atmosphere. Separation and purification processes based on adsorption can be expected to continue to fulfill environmental control and life support needs on future missions.

Adsorption↗

The effect of vitamin-mineral supplementation on juvenile delinquency among American schoolchildren: a randomized, double-blind placebo-controlled trial.

CONTEXT: Numerous studies conducted in juvenile correctional institutions have reported that violence and serious antisocial behavior have been cut almost in half after implementing nutrient-dense diets that are consistent with the World Health Organization's guidelines for fats, sugar, starches, and protein ratios. Two controlled trials tested whether the cause of the behavioral improvements was psychological or biological in nature by comparing the behavior of offenders who either received placebos or vitamin-mineral supplements designed to provide the micronutrient equivalent of a well-balanced diet. These randomized trials reported that institutionalized offenders, aged 13 to 17 years or 18 to 26 years, when given active tablets produced about 40% less violent and other antisocial behavior than the placebo controls. However, generalization could not be made to typical schoolchildren without a controlled trial examining violence and antisocial behavior in public schools. OBJECTIVES: To determine if schoolchildren, aged 6 to 12 years, who are given low dose vitamin-mineral tablets will produce significantly less violence and antisocial behavior in school than classmates who are given placebos. DESIGN: A stratified randomized, double-blind, placebo-controlled trial with pretest and post-test measures of antisocial behavior on school property. SETTINGS AND SUBJECTS: Two "working class," primarily Hispanic elementary schools in Phoenix, Arizona. Approximately half of the potential schoolchildren participated, i.e., 468 students aged 6 to 12 years. INTERVENTION: Daily vitamin-mineral supplementation at 50% of the U.S. recommended daily allowance (RDA) for 4 months versus placebo. The supplement was designed to raise vitamin-mineral intake up to the levels currently recommended by the National Academy of Sciences for children aged 6 to 11 years. OUTCOME MEASURE: Violent and nonviolent delinquency as measured by official school disciplinary records. RESULTS: Of the 468 students randomly assigned to active or placebo tablets, the 80 who were disciplined at least once between September 1st and May 1st served as the research sample. During intervention, the 40 children who received active tablets were disciplined, on average, 1 time each, a 47% lower mean rate of antisocial behavior than the 1.875 times each for the 40 children who received placebos (95% confidence interval, 29% to 65%, < 5 .020). The children who took active tablets produced lower rates of antisocial behavior in 8 types of recorded infractions: threats/fighting, vandalism, being disrespectful, disorderly conduct, defiance, obscenities, refusal to work or serve, endangering others, and nonspecified offenses. CONCLUSION: Poor nutritional habits in children that lead to low concentrations of water-soluble vitamins in blood, impair brain function and subsequently cause violence and other serious antisocial behavior. Correction of nutrient intake, either through a well-balanced diet or low-dose vitamin-mineral supplementation, corrects the low concentrations of vitamins in blood, improves brain function and subsequently lowers institutional violence and antisocial behavior by almost half. This paper adds to the literature by enabling previous research to be generalized from older incarcerated subjects with a history of antisocial behavior to a normal population of younger children in an educational setting.

Arizona↗

Development of life support requirements for long-term space flight.

When humans move out into the solar system to stay for long durations, the most immediate challenge will be the provision of a life-supporting environment in locations that are naturally devoid of food, air, and water. Life support systems must provide these commodities in all phases of space flight--during intravehicular activity (IVA) and during extra-vehicle activity (EVA). Systems that support human life must provide: overall reliability in the space environment, allowing maintenance and component replacement in space; reduced resupply mass of consumables and spares; for planetary surfaces, the ability to utilize local resources for increased self sufficiency; and the minimized mass power and volume requirements necessary for all space flight systems. This paper will discuss the melding of these technical requirements in such a way as to meet the human needs of space flight.

Ecological Systems, Closed↗

Health care policy: qualitative evidence and health technology assessment.

Since the late 1990s health technology assessment (HTA) has gained influence as a research and evaluation approach supporting health care policy. The focus on this methodology is congruent with the growing importance of evidence-based health care. Although HTA is a multidisciplinary discipline from a theoretical point of view, practice shows that social, ethical and psychological aspects are seldom truly integrated into the assessment of health technology. HTA is still very much biased by the medical and pharmaceutical research traditions. This contribution focuses on the question of how qualitative research findings could be useful as an additional source of information or as 'evidence' in HTA. Medical and health care scientists are seldom acquainted with qualitative research or judge it as a less (or un-)reliable form of research. 'Qualitative dimensions' of health care are not considered 'real' evidence. This contribution argues that qualitative findings could be put higher in the hierarchy of evidence generating research in health care. First it can be realized by improving the knowledge of the nature of qualitative research. Second qualitative findings can become more trustworthy information, if researchers themselves respect methodological prerequisites and clarify their theoretical perspective, research aims and use of research methods. Some methodological characteristics of qualitative research and 'evidence' are discussed for their contribution to HTA and evidence-based health care.

Evidence-Based Medicine↗

The microscopist of modern life.

This is an essay in the history of observation of the natural and social worlds. It explores how nineteenth-century Paris became a field and object of scientific observation and how the everyday lives, and even the health, of scientists living in the city and leaving the city for the "country" modeled observations and theoretical interpretation. The story concerns the first important work in the research school of Louis Pasteur to focus on a human and urban disease, diphtheria, rather than animal and rural ones. An urban field practice emerged from characteristically Parisian forms and literary fictions of street life and public space, leisure, spectacle, and crowds. Some of these, such as transcience, were (and still are) viewed as not only characteristic of "modern life," but also the source of new practices and sensibilities in painting and literature. Microbiological studies elsewhere --such as in New York and Hamburg--were based on very different urban structures, patterns of everyday life, national cultures, and aspects of modernity.

Biological Science Disciplines↗

Research in nondomestic species: experiences in reproductive physiology research for conservation of endangered felids.

Tremendous strides have been made in recent years to broaden our understanding of reproductive processes in nondomestic felid species and further our capacity to use this basic knowledge to control and manipulate reproduction of endangered cats. Much of that progress has culminated from detailed scientific studies conducted in nontraditional laboratory settings, frequently at collaborating zoological parks but also under more primitive conditions, including in the field. A mobile laboratory approach is described, which incorporates a diverse array of disciplines and research techniques. This approach has been extremely useful, especially for conducting gamete characterization and function studies as well as reproductive surveys, and for facilitating the development of assisted reproductive technology. With continuing advances in assisted reproduction in rare felids, more procedures are being conducted primarily as service-related activities, targeted to increase effectiveness of species propagation and population management. It can be a challenge for both investigators and institutional animal care and use committees (IACUCs) to differentiate these service-based procedures from traditional research studies (that require IACUC oversight). For research with rare cat species, multi-institutional collaboration frequently is necessary to gain access to scientifically meaningful numbers of study subjects. Similarly, for service-based efforts, the ability to perform reproductive procedures across institutions under nonstandard laboratory conditions is critical to applying reproductive sciences for managing and preserving threatened cat populations. Reproductive sciences can most effectively assist population management programs (e.g., Species Survival Plans) in addressing conservation priorities if these research and service-related procedures can be conducted "on the road" at distant national and international locales. This mobile laboratory approach has applications beyond endangered species research, notably for other scientific fields (e.g., studies of hereditary disease in domestic cat models) in which bringing the laboratory to the subject is of value.

Animals↗

The dual-use dilemma for the life sciences: perspectives, conundrums, and global solutions.

The term "dual-use" traditionally has been used to describe technologies that could have both civilian and military usage, but this term has at least three different dimensions that pose a dilemma for modern biology and its possible misuse for hostile purposes: (1) ostensibly civilian facilities that are in fact intended for military or terrorist bioweapons development and production; (2) equipment and agents that could be misappropriated and misused for biological weapons development and production; and (3) the generation and dissemination of scientific knowledge that could be misapplied for biological weapons development and production. These three different aspects of the "dual-use dilemma" are frequently confused--each demands a distinct approach within a "web of prevention" in order to reduce the future risk of bioterrorism and biowarfare. This article discusses the nature of the different perspectives and divergent approaches as a contribution to finding a scientifically acceptable global solution to the problem posed by the dual-use dilemma. We propose that: (1) facilities that are intended for bioweapons development and production should be primarily prevented by a strengthened Biological and Toxin Weapons Convention (BTWC) effectively implemented in all nation states, one that includes provisions for adequate transparency to improve confidence and a mechanism for thorough inspections when there is sufficient cause, and enhanced law enforcement activities involving international cooperation and sharing of critical intelligence information; (2) potentially dual-use equipment and agents should be available to legitimate users for peaceful purposes, but strengthened national biosafety and physical and personnel biosecurity controls in all nations together with effective export controls should be implemented to limit the potential for the misappropriation of such equipment and materials; and (3) information should be openly accessible by the global scientific community, but a culture of responsible conduct involving the breadth of the international life sciences communities should be adopted to protect the ongoing revolution in the life sciences from being hijacked for hostile misuse of the knowledge generated and communicated by life scientists.

Access to Information↗

Finnish nurse teachers' perceptions of their 'scientific thinking' and its development during Master's-level teacher education at university.

There are very few studies on nurse teachers education, since the main interest has been on the demanding nature of a teacher's work. In Finland, the educational system of nursing care is developing rapidly and nurse teachers' education is changing as well. However, there is no research into academic nurse teacher education, even though this can be seen as important with regard to the educational system as well as to the nursing discipline. In this study, the objective was to describe 45 nurse teachers' perceptions of the development of their scientific thinking during Master's-level studies at the university. Open-ended questions were used in collecting the material with a questionnaire. The results of this phenomenographic research show that the need to increase one's scientific knowledge, as well as external demands, were the reasons for applying for admission to the university. Conceptions of the development of scientific thinking differed with regard to the processing of knowledge and to changes or developments in scientific thinking. The teachers' conceptions of the use of scientific nursing knowledge varied as well. The results challenge future teacher education and how it is arranged and developed. Further research, utilising different research methods, is needed into the development of scientific thinking.

Adult↗

Précis of "Lifelines: biology, freedom, determinism".

There are many ways of describing and explaining the properties of living systems; causal, functional, and reductive accounts are necessary but no one account has primacy. The history of biology as a discipline has given excessive authority to reductionism, which collapses higher level accounts, such as social or behavioural ones, into molecular ones. Such reductionism becomes crudely ideological when applied to the human condition, with its claims for genes "for" everything from sexual orientation to compulsive shopping. The current enthusiasm for genetics and ultra-Darwinist accounts, with their selfish-gene metaphors for living processes, misunderstand both the phenomena of development and the interactive role that DNA and the fluid genome play in the cellular orchestra. DNA is not a blueprint, and the four dimensions of life (three of space, one of time) cannot be read off from its one-dimensional strand. Both developmental and evolutionary processes are more than merely instructive or selective; the organism constructs itself, a process known as autopoiesis, through a lifeline trajectory. Because organisms are thermodynamically open systems, living processes are homeodynamic, not homeostatic. The self-organising membrane-bound and energy-utilising metabolic web of the cell must have evolved prior to socalled naked replicators. Evolution is constrained by physics, chemistry, and structure; not all change is powered by natural selection, and not all phenotypes are adaptive. Finally, therefore, living processes are radically indeterminate; like all other living organisms, but to an even greater degree, we make our own future, though in circumstances not of our own choosing.

Animals↗

Kleinian guilt, determinism, and free will: implications for clinical theory and treatment.

The purpose of this discussion of teleological and deterministic concepts in clinical theory and treatment was not to offer definitive answers to a timeless philosophical problem. Indeed, a solution to the problem of free will in a deterministic science eludes even the greatest thinkers (cf. Howard and Conway, 1987). Following Feyerabend (1984), the purpose was instead to question one of the "general and lasting boundary conditions" (p.3)-causal explanations-introduced by Enlightenment-era philosophers of science to "protect" (p.3) science. I have attempted to demonstrate the logical inconsistencies of Klein's theory of etiology of infantile guild using both a teleological perspective that questions the assumption of causal explanations imposed on a scientific inquiry of human experience, and a deterministic perspective that affirms this assumption. When taken to their logical conclusions, both perspectives reduce to mutually irreconcilable theoretical and clinical absurdities. As as clinician I myself have chosen to work within a deterministic framework. I have found that perceiving the patient deterministically allows me to empathize with even the most unspeakable intrapsychic experiences. I share with my patient the antecedent conditions that efficiently cause our common experiences. It is this empathy for our share human condition-in al its transcendence, frailty, and profanity-communicated through interpretation that seems to give birth to the healing process (Goodman, 1991). This discussion doubtless also contains inconsistencies. Nevertheless, it contributes to the ongoing discourse of clinical theory and treatment because it draws attention to the enormous, yet still largely implicit, debt that clinical theory and treatment owe to philosophy. It is a great irony that the discipline that has historically put scientific inquiry in shackles also has the power to set it free. Whether teleology is the philosophical perspective to set clinical theory and treatment free, however, seems unlikely. In choosing to discuss Klein's theory of infantile guilt, I have taken seriously R.J. Rychlak and Rychlak's (1990) implicit support (cf. p.48) for a teleology that functions throughout the life span, et find it difficult to imagine both the unconscious and conscious minds with freely premising capacities-as if human being were actually two persons in one. One the other hand, reducing human beings to the status of Hobbesian machines-as the deterministic perspective seems to imply-presents a similarly unattractive alternative. To understand the nature of human suffering and the process of healing it, however, one thing is certain: A philosophical discourse of clinical theory and treatment must continue.

Causality↗

A consensus approach to planetary protection requirements: recommendations for Mars lander missions.

Over the last several years, the nature of the surface conditions on the planet Mars, our knowledge of the growth capabilities of Earth organisms under extreme conditions, and future opportunities for Mars exploration have been under extensive review in the United States and elsewhere. As part of these examinations, in 1992 the US Space Studies Board made a series of recommendations to NASA on the requirements that should be implemented on future missions that will explore Mars. In particular, significant changes were recommended in the requirements for Mars landers, changes that significantly alleviated the burden of planetary protection implementation for these missions. In this paper we propose a resolution implementing this new set of recommendations, for adoption by COSPAR at its 30th meeting in Hamburg. We also discuss future directions and study areas for planetary protection, in light of changing plans for Mars exploration.

Consensus Statements as Topic↗

Endocrine, renal, and circulatory influences on fluid and electrolyte homeostasis during weightlessness: a joint Russian-U.S. project.

Microgravity is known to have a substantial effect on fluid homeostasis. The research described here was planned as part of the first joint Russian-U.S. science program carried out during a Shuttle flight. The aim of the program was to study the nature of the changes in fluid homeostasis induced by microgravity, as well as to determine the possible mechanisms underlying the regulation of fluid balance under conditions of spaceflight. To determine the effects of spaceflight on the homeostasis of fluid and electrolytes, measurements were taken of total body water, extracellular fluid plasma volumes, levels of regulatory hormones, and nutrient consumption before, during, and after a nine-day flight. Changes in renal function were studied before and after the flight. In these 2 subjects, weightlessness was not associated with a decreased extracellular fluid volume. However, there were the characteristic decreases in plasma atrial natriuretic peptide concentrations, and increases in plasma and urinary cortisol. Results indicated decreased urine volume, even through the first 48 hours of flight. Fluid volumes and glomerular filtration rate were increased after landing, probably related to the saline-loading countermeasure used by Shuttle crewmembers. The information obtained as a result of this research will facilitate the development of future research programs, as well as preventive measures for future long-duration spaceflights.

Body Water↗

Development of countermeasures for medical problems encountered in space flight.

By the turn of this century, long-duration space missions, either in low Earth orbit or for got early planetary missions, will become commonplace. From the physiological standpoint, exposure to the weightless environment results in changes in body function, some of which are adaptive in nature and some of which can be life threatening. Important issues such as environmental health, radiation protection, physical deconditioning, and bone and muscle loss are of concern to life scientists and mission designers. Physical conditioning techniques such as exercise are not sufficient to protect future space travellers. A review of past experience with piloted missions has shown that gradual breakdown in bone and muscle tissue, together with fluid losses, despite a vigorous exercise regimen can ultimately lead to increased evidence of renal stones, musculoskeletal injuries, and bone fractures. Biological effects of radiation can, over long periods of time increase the risk of cancer development. Today, a vigorous program of study on the means to provide a complex exercise regimen to the antigravity muscles and skeleton is under study. Additional evaluation of artificial gravity as a mechanism to counteract bone and muscle deconditioning and cardiovascular asthenia is under study. New radiation methods are being developed. This paper will deal with the results of these studies.

Aerospace Medicine↗

Electrical energy sources for organic synthesis on the early Earth.

In 1959, Miller and Urey (Science 130, 245) published their classic compilation of energy sources for indigenous prebiotic organic synthesis on the early Earth. Much contemporary origins of life research continues to employ their original estimates for terrestrial energy dissipation by lightning and coronal discharges, 2 x 10(19) J yr-1 and 6 x 10(19) J yr-1, respectively. However, more recent work in terrestrial lightning and point discharge research suggests that these values are overestimates by factors of about 20 and 120, respectively. Calculated concentrations of amino acids (or other prebiotic organic products) in the early terrestrial oceans due to electrical discharge sources may therefore have been equally overestimated. A review of efficiencies for those experiments that provide good analogues to naturally-occurring lightning and coronal discharges suggests that lightning energy yields for organic synthesis (nmole J-1) are about one order of magnitude higher than those for coronal discharge. Therefore organic production by lightning may be expected to have dominated that due to coronae on early Earth. Limited data available for production of nitric oxide in clouds suggests that coronal emission within clouds, a source of energy heretofore too uncertain to be included in the total coronal energy inventory, is insufficient to change this conclusion. Our recommended values for lightning and coronal discharge dissipation rates on the early Earth are, respectively, 1 x 10(18) J yr-1 and 5 x 10(17) J yr-1.

Earth, Planet↗

Scientific investigations at a lunar base.

Scientific investigations to be carried out at a lunar base can have significant impact on the location, extent, and complexity of lunar surface facilities. Among the potential research activities to be carried out are: (1) Lunar Science: Studies of the origin and history of the Moon and early solar system, based on lunar field investigations, operation of networks of seismic and other instruments, and collection and analysis of materials; (2) Space Plasma Physics: Studies of the time variation of the charged particles of the solar wind, solar flares and cosmic rays that impact the Moon as it moves in and out of the magnetotail of the Earth; (3) Astronomy: Utilizing the lunar environment and stability of the surface to emplace arrays of astronomical instruments across the electromagnetic spectrum to improve spectral and spatial resolution by several orders of magnitude beyond the Hubble Space Telescope and other space observatories; (4) Fundamental physics and chemistry: Research that takes advantage of the lunar environment, such as high vacuum, low magnetic field, and thermal properties to carry out new investigations in chemistry and physics. This includes material sciences and applications; (5) Life Sciences: Experiments, such as those that require extreme isolation, highly sterile conditions, or very low natural background of organic materials may be possible; and (6) Lunar environmental science: Because many of the experiments proposed for the lunar surface depend on the special environment of the Moon, it will be necessary to understand the mechanisms that are active and which determine the major aspects of that environment, particularly the maintenance of high-vacuum conditions. From a large range of experiments, investigations and facilities that have been suggested, three specific classes of investigations are described in greater detail to show how site selection and base complexity may be affected: (1) Extended geological investigation of a complex region up to 250 kilometers from the base requires long range mobility, with transportable life support systems and laboratory facilities for the analysis of rocks and soil. Selection of an optimum base site would depend heavily on an evaluation of the degree to which science objectives could be met. These objectives could include lunar cratering, volcanism, resource surveys or other investigations; (2) An astronomical observatory initially instrumented with a VLF radio telescope, but later expanding to include other instruments, requires site preparation capability, "line shack" life support systems, instrument maintenance and storage facilities, and sortie mode transportation. A site perpetually shielded from Earth is optimum for the advanced stages of a lunar observatory; (3) an experimental physics laboratory conducting studies requiring high vacuum facilities and heavily instrumented experiments, is not highly dependent on lunar location, but will require much more flexibility in experiment operation and EVA capability, and more sophisticated instrument maintenance and fabrication facilities.

Astronomical Phenomena↗

A graduate education framework for tropical conservation and development.

Conventional graduate training related to tropical conservation and development has typically separated the two fields, with students focusing on either conservation from the perspective of the biophysical sciences or development as an extension of the social sciences. On entering the workforce, however graduates find they are required to work beyond disciplinary boundaries to address the complex interconnectivity between biological conservation and human well-being. We devised a framework for graduate education that broadens students' skill sets to learn outside their immediate disciplines and think in terms of linked socioecological systems, work in teams, communicate in nonacademic formats, and reflect critically on their own perspectives and actions. The University of Florida's Tropical Conservation and Development program has adopted a learning and action platform that blends theory, skills, and praxis to create an intellectual, social, and professionally safe space where students, faculty, and other participants can creatively address the complex challenges of tropical conservation and development. This platform operates within a nondegree-granting program and includes core courses that are taught by a team of biophysical and social scientists. It incorporates a range of alternative learning spaces such as student-led workshops, retreats, visiting professionals, practitioner experiences, and a weekly student-led seminar that collectively encourage students and faculty to enhance their skills and systematically and thoroughly reflect on program activities. Challenges to the described approach include increased service demands on faculty, a redefinition of research excellence to include effective and equitable collaboration with host-country partners, and the trade-offs and uncertainties inherent in more collaborative, interdisciplinary research. Despite these challenges, growing interdisciplinary programs, coupled with adaptive educational approaches that emphasize learning and action networks of students, faculty, and field partners, provide the best hope for responding to the emerging challenges of tropical conservation and development.

Conservation of Natural Resources↗