San JOse DJ - Academia.edu (original) (raw)
Papers by San JOse DJ
Human Factors: The Journal of the Human Factors and Ergonomics Society, 1984
To answer questions related to keying errors and error corrections, performance data were collect... more To answer questions related to keying errors and error corrections, performance data were collected from typists as they keyed text into a simulated word-processing system. Data are presented on the frequency of error detection, the amount of time spent correcting errors, the number of characters erased per error correction, and the types of errors corrected. Comparisons are also made between corrected and uncorrected errors.
![Research paper thumbnail of [Polymers]. Summary of 1994--5 activities](https://attachments.academia-assets.com/103634330/thumbnails/1.jpg)
](of 1994-5 Activities Grant FG03-MER-45375 z)oE;kP/y5375-* Confinement of Block Copolymers Thin fi... more of 1994-5 Activities Grant FG03-MER-45375 z)oE;kP/y5375-* Confinement of Block Copolymers Thin films of diblock copolymers self-assemble into a multilayered structure due to the preferential interactions of the blocks with the air surface and the substrate interface. This multilayering forces the film thickness at any point to be given in terms of an integral or half integral multiple of the equilibrium period. If the initial film thickness is not commensurate with this constraint, then islands or holes, with a step height of one period, form on the surface.
2009 IEEE/AIAA 28th Digital Avionics Systems Conference, 2009
A human-in-the-loop simulation was conducted that examined off-nominal and tactical conflict situ... more A human-in-the-loop simulation was conducted that examined off-nominal and tactical conflict situations in an advanced Next Generation Air Transportation System (NextGen) environment. Traffic levels were set at two times (2X) and three times (3X) current day levels and the handling of tactical conflict situations was done either with or without support from Tactical Separation Assisted Flight Environment (TSAFE) automation. Strategic conflicts and all routine tasks performed in today's system were handled by ground-based automation. This paper focuses on the response strategies observed in two scripted tactical conflict situations and how they differed according to whether or not automated resolution support was provided by TSAFE. An examination of the two situations revealed that when TSAFE automation was active, participants tended to provide additional, complementary maneuvers to supplement the tactical vector issued by TSAFE. This also included a greater tendency to use both aircraft in a conflict pair. When TSAFE support was not available, participants tended to use single vector or altitude maneuvers and were more likely to attempt resolutions using a single aircraft as well. Some issues that arose through the operations simulated in this study related to the need for the Air Navigation Service Provider (ANSP) to be able to have final authority over the issuance of TSAFE maneuvers as well as the importance of having awareness of the immediate traffic situation in making effective and safe time-critical decisions.
Systematic Entomology, 2014
Bactrocera papayae Drew & Hancock, Bactrocera philippinensis Drew & Hancock, Bactrocera carambola... more Bactrocera papayae Drew & Hancock, Bactrocera philippinensis Drew & Hancock, Bactrocera carambolae Drew & Hancock, and Bactrocera invadens Drew, Tsuruta & White are four horticultural pest tephritid fruit fly species that are highly similar, morphologically and genetically, to the destructive pest, the Oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae). This similarity has rendered the discovery of reliable diagnostic characters problematic, which, in view of the economic importance of these taxa and the international trade implications, has resulted in ongoing difficulties for many areas of plant protection and food security. Consequently, a major international collaborative and integrated multidisciplinary research effort was initiated in 2009 to build upon existing literature with the specific aim of resolving biological species limits among B. papayae, B. philippinensis, B. carambolae, B. invadens and B. dorsalis to overcome constraints to pest management and international trade. Bactrocera philippinensis has recently been synonymized with B. papayae as a result of this initiative and this review corroborates that finding; however, the other names remain in use. While consistent characters have been found to reliably distinguish B. carambolae from B. dorsalis, B. invadens and B. papayae, no such characters have been found to differentiate the latter three putative species. We conclude that B. carambolae is a valid species and that the remaining taxa, B. dorsalis, B. invadens and B. papayae, represent the same species. Thus, we consider B. dorsalis (Hendel) as the senior synonym of B. papayae Drew and Hancock syn.n. and B. invadens Drew, Tsuruta & White syn.n. A redescription of B. dorsalis is provided. Given the agricultural importance of B. dorsalis, this taxonomic decision will have significant global plant biosecurity implications, affecting pest management, quarantine, international trade, postharvest treatment and basic research. Throughout the paper, we emphasize the value of independent and multidisciplinary tools in delimiting species, particularly in complicated cases involving morphologically cryptic taxa.
Global Change Biology, 2004
The study investigates the effect of land-use change on nitrous oxide (N 2 O) and methane (CH 4) ... more The study investigates the effect of land-use change on nitrous oxide (N 2 O) and methane (CH 4) fluxes from soil, in savanna ecosystems of the Orinoco region (Venezuela). Gas fluxes were measured by closed static chambers, in the wet and dry season, in representative systems of land management of the region: a cultivated pasture, an herbaceous savanna, a tree savanna and a woodland (control site). Higher N 2 O emissions were observed in the cultivated pasture and in the herbaceous savanna compared with the tree savanna and the woodland, and differences were mainly related to fine soil particle content and soil volumetric water content measured in the studied sites. Overall N 2 O emissions were quite low in all sites (0-1.58 mg N 2 ON m À2 day À1). The cultivated pasture and the woodland savanna were on average weak CH 4 sinks (À0.05 AE 0.07 and À0.08 AE 0.05 mg CH 4 m À2 day À1 , respectively), whereas the herbaceous savanna and the tree savanna showed net CH 4 production (0.23 AE 0.05 and 0.19 AE 0.05 mg CH 4 m À2 day À1 , respectively). Variations of CH 4 fluxes were mainly driven by variation of soil waterfilled pore space (WFPS), and a shift from net CH 4 consumption to net CH 4 production was observed at around 30% WFPS. Overall, the data suggest that conversion of woodland savanna to managed landscape could alter both CH 4 and N 2 O fluxes; however, the magnitude of such variation depends on the soil characteristics and on the type of land management before conversion.
Human Factors: The Journal of the Human Factors and Ergonomics Society, 1984
To answer questions related to keying errors and error corrections, performance data were collect... more To answer questions related to keying errors and error corrections, performance data were collected from typists as they keyed text into a simulated word-processing system. Data are presented on the frequency of error detection, the amount of time spent correcting errors, the number of characters erased per error correction, and the types of errors corrected. Comparisons are also made between corrected and uncorrected errors.
of 1994-5 Activities Grant FG03-MER-45375 z)oE;kP/y5375-* Confinement of Block Copolymers Thin fi... more of 1994-5 Activities Grant FG03-MER-45375 z)oE;kP/y5375-* Confinement of Block Copolymers Thin films of diblock copolymers self-assemble into a multilayered structure due to the preferential interactions of the blocks with the air surface and the substrate interface. This multilayering forces the film thickness at any point to be given in terms of an integral or half integral multiple of the equilibrium period. If the initial film thickness is not commensurate with this constraint, then islands or holes, with a step height of one period, form on the surface.
2009 IEEE/AIAA 28th Digital Avionics Systems Conference, 2009
A human-in-the-loop simulation was conducted that examined off-nominal and tactical conflict situ... more A human-in-the-loop simulation was conducted that examined off-nominal and tactical conflict situations in an advanced Next Generation Air Transportation System (NextGen) environment. Traffic levels were set at two times (2X) and three times (3X) current day levels and the handling of tactical conflict situations was done either with or without support from Tactical Separation Assisted Flight Environment (TSAFE) automation. Strategic conflicts and all routine tasks performed in today's system were handled by ground-based automation. This paper focuses on the response strategies observed in two scripted tactical conflict situations and how they differed according to whether or not automated resolution support was provided by TSAFE. An examination of the two situations revealed that when TSAFE automation was active, participants tended to provide additional, complementary maneuvers to supplement the tactical vector issued by TSAFE. This also included a greater tendency to use both aircraft in a conflict pair. When TSAFE support was not available, participants tended to use single vector or altitude maneuvers and were more likely to attempt resolutions using a single aircraft as well. Some issues that arose through the operations simulated in this study related to the need for the Air Navigation Service Provider (ANSP) to be able to have final authority over the issuance of TSAFE maneuvers as well as the importance of having awareness of the immediate traffic situation in making effective and safe time-critical decisions.
Systematic Entomology, 2014
Bactrocera papayae Drew & Hancock, Bactrocera philippinensis Drew & Hancock, Bactrocera carambola... more Bactrocera papayae Drew & Hancock, Bactrocera philippinensis Drew & Hancock, Bactrocera carambolae Drew & Hancock, and Bactrocera invadens Drew, Tsuruta & White are four horticultural pest tephritid fruit fly species that are highly similar, morphologically and genetically, to the destructive pest, the Oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae). This similarity has rendered the discovery of reliable diagnostic characters problematic, which, in view of the economic importance of these taxa and the international trade implications, has resulted in ongoing difficulties for many areas of plant protection and food security. Consequently, a major international collaborative and integrated multidisciplinary research effort was initiated in 2009 to build upon existing literature with the specific aim of resolving biological species limits among B. papayae, B. philippinensis, B. carambolae, B. invadens and B. dorsalis to overcome constraints to pest management and international trade. Bactrocera philippinensis has recently been synonymized with B. papayae as a result of this initiative and this review corroborates that finding; however, the other names remain in use. While consistent characters have been found to reliably distinguish B. carambolae from B. dorsalis, B. invadens and B. papayae, no such characters have been found to differentiate the latter three putative species. We conclude that B. carambolae is a valid species and that the remaining taxa, B. dorsalis, B. invadens and B. papayae, represent the same species. Thus, we consider B. dorsalis (Hendel) as the senior synonym of B. papayae Drew and Hancock syn.n. and B. invadens Drew, Tsuruta & White syn.n. A redescription of B. dorsalis is provided. Given the agricultural importance of B. dorsalis, this taxonomic decision will have significant global plant biosecurity implications, affecting pest management, quarantine, international trade, postharvest treatment and basic research. Throughout the paper, we emphasize the value of independent and multidisciplinary tools in delimiting species, particularly in complicated cases involving morphologically cryptic taxa.
Global Change Biology, 2004
The study investigates the effect of land-use change on nitrous oxide (N 2 O) and methane (CH 4) ... more The study investigates the effect of land-use change on nitrous oxide (N 2 O) and methane (CH 4) fluxes from soil, in savanna ecosystems of the Orinoco region (Venezuela). Gas fluxes were measured by closed static chambers, in the wet and dry season, in representative systems of land management of the region: a cultivated pasture, an herbaceous savanna, a tree savanna and a woodland (control site). Higher N 2 O emissions were observed in the cultivated pasture and in the herbaceous savanna compared with the tree savanna and the woodland, and differences were mainly related to fine soil particle content and soil volumetric water content measured in the studied sites. Overall N 2 O emissions were quite low in all sites (0-1.58 mg N 2 ON m À2 day À1). The cultivated pasture and the woodland savanna were on average weak CH 4 sinks (À0.05 AE 0.07 and À0.08 AE 0.05 mg CH 4 m À2 day À1 , respectively), whereas the herbaceous savanna and the tree savanna showed net CH 4 production (0.23 AE 0.05 and 0.19 AE 0.05 mg CH 4 m À2 day À1 , respectively). Variations of CH 4 fluxes were mainly driven by variation of soil waterfilled pore space (WFPS), and a shift from net CH 4 consumption to net CH 4 production was observed at around 30% WFPS. Overall, the data suggest that conversion of woodland savanna to managed landscape could alter both CH 4 and N 2 O fluxes; however, the magnitude of such variation depends on the soil characteristics and on the type of land management before conversion.