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D Callahan

Publications and source records attributed to D Callahan.

At least 19 recordsLinked to original sources
PubMed2004

First results from the Cryogenic Dark Matter Search in the Soudan Underground Laboratory.

We report the first results from a search for weakly interacting massive particles (WIMPs) in the Cryogenic Dark Matter Search experiment at the Soudan Underground Laboratory. Four Ge and two Si detectors were operated for 52.6 live days, providing 19.4 kg d of Ge net exposure after cuts for recoil energies between 10 and 100 keV. A blind analysis was performed using only calibration data to define the energy threshold and selection criteria for nuclear-recoil candidates. Using the standard dark-matter halo and nuclear-physics WIMP model, these data set the world's lowest exclusion limits on the coherent WIMP-nucleon scalar cross section for all WIMP masses above 15 GeV/c2, ruling out a significant range of neutralino supersymmetric models. The minimum of this limit curve at the 90% C.L. is 4 x 10(-43) cm2 at a WIMP mass of 60 GeV/c2.

Journal Article↗
PubMed2003

Principlism and communitarianism.

The decline in the interest in ethical theory is first outlined, as a background to the author's discussion of principlism. The author's own stance, that of a communitarian philosopher, is then described, before the subject of principlism itself is addressed. Two problems stand in the way of the author's embracing principlism: its individualistic bias and its capacity to block substantive ethical inquiry. The more serious problem the author finds to be its blocking function. Discussing the four scenarios the author finds that the utility of principlism is shown in the two scenarios about Jehovah's Witnesses but that when it comes to selling kidneys for transplantation and germline enhancement, principlism is of little help.

Acquired Immunodeficiency Syndrome↗
PubMed2001

A way forward.

Explore the source record for details and available documents.

Cloning, Organism↗
PubMed2001

Health care for children: a community perspective.

There are two puzzles about health care for children that need explanation. Why is it the sentimentality Americans express about children has not been backed by solid health care programs? If children are to have good health care, how can a case for their high priority be made, particularly in light of the fact that their health is the best of all age groups in the country? The first question is explored, but the second question is the focus of this paper. A priority system for health care is proposed, and at the same time an argument is presented for why children should have a high priority despite their generally good health.

Child↗
PubMed2000

Judging the future: Whose fault will it be?

This paper looks at the future from the perspective of the way in which present thinking can influence what the future might be. It assumes that history shapes the future and that the present generation is in a position to shape it. It looks at the future of medicine as a science and a professional discipline, of health care as policy and politics, of culture and ideology as forces shaping medicine and health care, and of biomedical ethics as an influential source of wisdom and perspective. The paper argues that a strong future for bioethics requires a broad rather than a reductionistic vision of its proper work.

Bioethics↗
PubMed2000

Job-based health insurance. Who has the duty to lead?

A noted medical ethicist argues that only the business community has the collective power and resources to create a "sustainable medicine" for the nation's health care. But will employers have sufficient incentive and motivation to do so?

Delivery of Health Care↗
PubMed2000

Oregon's first year: the medicalization of control.

The results of Oregon's first year with physician-assisted suicide raise two questions. First, how will it be possible to evaluate what is actually going on in Oregon if there is no public access to the records and if physicians are shielded by patient confidentiality rules? The second question is whether the public understood that many, if not most, of those who want physician-assisted suicide want it not to relieve suffering as ordinarily understood but to maintain control over their dying, something that may not correlate at all with suffering from illness and disease. This commentary reviews the existing evidence from the Netherlands and suggests that abuse of the vulnerable will likely occur in Oregon over time. It also reviews the insufficiency of the data emerging from Oregon. Finally, it addresses the various issues raised by other commentators to the main article.

Confidentiality↗
PubMed1999

Shaping biomedical research priorities: the case of the National Institutes of Health.

Despite the international interest in priority setting as an important tool for health policy, there has been comparatively little interest in the setting of research priorities. One of the few places where there has been such an interest is at the National Institutes of Health (NIH) in the United States. Under pressure from Congress to explain its priority setting process, the NIH has tried to explain the criteria and process it uses. The NIH procedure is described, and the problems created by the criteria it uses are analyzed. Although it uses the language of priority setting, it is uncertain whether it does have a real method of setting priorities. Nonetheless, despite the lack of a method, the results of its work are lauded. In the long run, however, NIH will need a more rigorous method of setting priorities.

Biomedical Research↗