72,191 research outputs found
Rings with (a, b, c) = (a, c, b) and (a, [b, c]d) = 0: A Case Study Using Albert
No full textAlbert is an interactive computer system for building nonassociative algebras [2]. In this paper, we suggest certain techniques for using Albert that allow one to posit and test hypotheses effectively. This process provides a fast way to achieve new results, and interacts nicely with traditional methods. We demonstrate the methodology by proving that any semiprime ring, having characteristic ≠ 2, 3, and satisfying the identities (a, b, c) - (a, c, b) = (a, [b, c], d) = 0, is associative. This generalizes a recent result by Y. Paul [7].This is an Accepted Manuscript of an article published by Taylor & Francis as Hentzel, Irvin Roy, D. P. Jacobs, and Erwin Kleinfeld. "Rings with (a, b, c)=(a, c, b) and (a,[b, c] d)= 0: a case study using albert." International journal of computer mathematics 49, no. 1-2 (1993): 19-27. doi: 10.1080/00207169308804211. Posted with permission. </p
Maximizing Research Impact Through Institutional and National Open-Access Self-Archiving Mandates
No full textNo research institution can afford all the journals its researchers may need, so all articles are losing research impact (usage and citations). Articles made “Open Access,” (OA) by self-archiving them on the web are cited twice as much, but only 15% of articles are being spontaneously self-archived. The only institutions approaching 100% self-archiving are those that mandate it. Surveys show that 95% of authors will comply with a self-archiving mandate; the actual expe-rience of institutions with mandates has confirmed this. What institutions and funders need to mandate is that (1) immediately upon acceptance for publication, (2) the author’s final draft must be (3) deposited into the Institutional Repository. Only the depositing needs to be mandated; set-ting access privileges to the full-text as either OA or Restricted Access (RA) can be left up to the author. For articles published in the 93% of journals that have already endorsed self-archiving, access can be set as OA immediately; for the remaining 7%, authors can email the eprint in re-sponse to individual email requests automatically forwarded by the Repository
Colophon struempheri Jacobs & Scholtz, new species
No full textColophon struempheri Jacobs & Scholtz, new species (Fig 3 a-d; Table 1). Type material. Holotype: (1 ♂: ISAM); Paratypes: (1 ♂, 1 ♀: UPSA). Diagnosis. Colophon struempheri is most similar to C. deschodti, but can be distinguished from the latter by the lack of median point or protuberance on the anterior margin of the head. Furthermore, C. deschodti has the mentum distinctly bifid, whereas C. struempheri has the mentum narrow and slightly bifid. Pairwise genetic distance from C. stokoei is 7.4 % for COI (Switala et al. 2014). Holotype description. Colour: Black. Size: Male: length 19.8 mm, pronotal width: 10.3 mm, mandible length: 3.1 mm. Female: 15.6 mm, pronotal width: 8.7 mm. Head: Declivous in front but with a feeble indication of a definite anterior margin (Table 1). Mandible: Apex of mandible deeply impressed on upper surface as in C. stokoei; ventral process prominent, rectangular (Table 1). Mentum: Anterior surface narrow, not excavated; anterior margin simply bifid; ventral surface deeply impressed on either side of a projecting median ridge (Table 1). Legs: Protibia similar to C. stokoei, but less curved and less robust, the two apical teeth sharper and the extension is less deep (Fig. 3 d). Male genitalia: As in C. stokoei. Variation. Size: length 19.86–20.08 mm, pronotal width 10.29–10.70 mm (n = 2). Female: Description as for C. stokoei (Fig. 3 c). Distribution. Hottentots Holland Mountains, Western Cape Province, South Africa. Etymology. The species is named after Werner P. Strümpher in recognition of his contribution to the study of Colophon.Published as part of Jacobs, Carmen T., Scholtz, Clarke H. & Strümpher, Werner P., 2015, Taxonomy of Colophon Gray (Coleoptera: Lucanidae): new species and a status change, pp. 135-142 in Zootaxa 4057 (1) on pages 138-139, DOI: 10.11646/zootaxa.4057.1.9, http://zenodo.org/record/23323
On the role of general purpose technologies within the Marshall-Jacobs controversy: The case of nanotechnologies
No full textThis paper investigates the role of nanotechnologies as a general purpose technology for regional development. Due to pervasiveness, nanotechnologies may be utilized in diverse applications thereby providing the basis for both localization and urbanization externalities. We carry out patent and publication analyses for the city state of Hamburg during the period 1990-2010. We find evidence that nanotechnologies are advanced in the context of regional knowledge bases and follow up prevailing specialization patterns. As nanotechnologies develop both industry specific and city specific externalities become effective leading to specialization deepening and specialization widening which both are functions of the increasing nano-knowledge base. --general purpose technology,nanotechnology,specialization,diversification,Marshall-Jacobs controversy,patent and publication analysis
Colophon switalae Jacobs & Scholtz, new species
No full textColophon switalae Jacobs & Scholtz, new species (Fig 2 a–d; Table 1). Type material. Holotype: (1 ♂: ISAM); Paratypes: (10 ♂: ISAM), (2 ♂: TMSA), (2 ♂: UPSA). Diagnosis. Colophon switalae is distinguished from other members in the group by the shape of the mentum, which is characterised by a distinct concave ridge on the anterior margin of the head. It is the only species in the group with two distinct colour forms. The shape of the mentum is also diagnostic (Table 1). Pairwise genetic distance from C. stokoei is 8.4 % for COI (Switala et al. 2014). Holotype description. Colour: Black. Size: length 23.4 mm, pronotal width, 11.9 mm, mandible length: 3.1 mm. Head: Anterior margin with distinct concave ridge, straight to sinuate (Table 1). Mandible: Apex of mandible deeply impressed on upper surface as in C. stokoei (Table 1). Mentum: Attenuated anteriorly in ventral view; anterior margin rounded; anterior surface quadrangulate and excavated (Table 1). Legs: Protibia robust (Fig. 3 c). Male genitalia: As in C. stokoei. Variation. Size: length 17.0–21.0 mm, pronotal width 9.7–10.8 mm (n = 14). Female: Unknown. Distribution. Hottentots Holland Mountains, Western Cape Province, South Africa. Etymology. It is with great pleasure that we name this species after Angelika Switala, in recognition of her contribution to our knowledge of these rare mountain relicts. Comment. The colour of the legs of the males shows two distinct forms, red and black, without any intermediates (Fig. 3 d). The populations of the two colour forms appear to occur allopatrically and may represent novel lineages but this requires further investigation.Published as part of Jacobs, Carmen T., Scholtz, Clarke H. & Strümpher, Werner P., 2015, Taxonomy of Colophon Gray (Coleoptera: Lucanidae): new species and a status change, pp. 135-142 in Zootaxa 4057 (1) on pages 137-138, DOI: 10.11646/zootaxa.4057.1.9, http://zenodo.org/record/23323
Letter from S. B. Simmons to J. P. Burgess, J. R. Thomas, James E. Diggs, I. C. Leece and H. D. Jacobs
No full textLetter from S. B. Simmons to J. P. Burgess, J. R. Thomas, James E. Diggs, I. C. Leece and H. D. Jacobs, concerning medals
Dutch Identity in Fashion. Co-Evolution between Brands and Consumers
No full textItem does not contain fulltextUniversiteit van Amsterdam, 12 juni 2013Promotores : Jacobs, D., Smelik, A.M.143 p
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Letter from C. D. Dawson, Tusayan Copper Mining and Smelting, to Carl Hayden
No full textLetter from C. D. Dawson to Carl Hayden urging him to consider the rights of miners and farmers when drawing up the boundaries for the proposed park
Randall Jacobs to Walter Franklin George, June 25, 1942
No full textA letter from Randall Jacobs, Chief of Navy Personnel, to Senator Walter Franklin George in regards to Samuel Robert Owens' whereabouts and condition. Samuel Robert Owens (1918-1995) was stationed at Cavite Naval Yard in the Philippines when the United States entered World War II. He was a member of the crew of the submarine tender USS Canopus (AS-9), which was actively involved in the defense of the Bataan peninsula until the fall of Bataan on April 9, 1942. The majority of the crew of USS Canopus, including Owens, were captured by the Japanese at Corregidor, and became prisoners of war. Owens remained a POW until the end of the war and received the Silver Star and Bronze Star for his service.In reply address not the signer of this
letter, but Bureau of Naval Personnel,
Navy Department, Washington, D. C.
Refer to No. NAVY DEPARTMENT
Pers-64-O-j^M
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BUREAU OF NAVAL PERSONNEL
WASHINGTON, D. C.
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My dear Senator George:
I desire to acknowledge receipt of your communication
dated June 10, 1942, enclosing letter from ijs. Sd.vard Preetorius,
of Box #1, Hunters, Georgia, written in the interest of her mother,
who is anxious to obtain definite information as to the fate of
Samuel Robert Owens, Torpedoman second class, U. S. Navy.
Upon a review of the record of OVENS, it is noted that he
was a member of the crew of the U.S.S. CANOPUS, which vessel was
destroyed by the U.S. Forces to prevent its being of use to the
enemy in event of capture of Bataan. However, he was undoubtedly
transferred from that ship prior to its destruction, as he "was
attached to the Submarine Base, Fort kills, Philippine Islands on
February 17, 1942. A report from the Commandant Sixteenth Naval
District, showed OVENS to be serving in the Manila Bay Area on
March 20, 1942. This was the last report from that area and since
the fall of Corregidor his fate is not known.
On iaay 11, 1942, the Navy Department sent a despatch to
07i:.iiS father, Mr. Stephen J. Owens, of Webster North Carolina,
which stated that O.EMS will be carried on the records of the
Department as "missing", pending further information. No report
of his death or injury has been received, and it may be that he
is now a prisoner of war.
Mrs. Ovjens great anxiety is appreciated and please be
assured that any further report will be communicated directly
to her.
Sincerely yours,
RANDALL JACOBS
The
y
Hon. Walter F. George
United States Senat
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