... Kamora Island, 8M/2000, 2 males, 1.85 and 2.1 mm, 1 female, 1.7 mm, coll. DL Rahayu (PTFI-132... more ... Kamora Island, 8M/2000, 2 males, 1.85 and 2.1 mm, 1 female, 1.7 mm, coll. DL Rahayu (PTFI-132). ... Reise der ?sterreichischen Fregatte Novara um die Erde, in den Jahren 1857-58-59, unter den Befehlen des Commodors B. von W?llerstorf-Urbair, (Zool.), 2 (3): 1-280. ...
Two new species and a new distributional record of the sesarmine crabs of the genus Perisesarma a... more Two new species and a new distributional record of the sesarmine crabs of the genus Perisesarma are recorded from a mangrove area in southwestern Irian Jaya, Indonesia. Perisesarmaforesti sp. nov. and P. cricotus sp. nov. can be most easily separated from their congeners by the number, shape, and ornamentation of the cheliped dactylar tubercles. Perisesarma cricotus is also recorded from Ambon, eastern Indonesia. Perisesarma semperi (Btirger,. 1894) is a first record for Indonesia and marks a significant southerly range extension. Deux especes nouvelles sont decrites et une nouvelle reference geographique des crabes Sesarminae Perisesarma est fournie a partir de specimens recoltes sur Ia cote sud-occidentale de I'Irian Jaya, Indonesie. Perisesarma foresti sp. nov. et P. cricotus sp. nov. peuvent etre differenciees de leurs congeneres par le nombre, Ia forme et l'ornementation des tubercules du dactyle du chelipede. Perisesarma cricotus est aussi signa1e d' Ambon, Indonesie orientale. Perisesarma semperi (Btirger, 1894) est trouve pour 1a premiere fois en lndonesie, indiquant une extension significative de sa presence vers 1e sud. chophorum De Man, 1895, and additionally included Sesarma dussumieri A. Milne-Edwards, 1853, in the new subgenus. De Man (1888: 175) had earlier included 3) Former address:
One hundred and two species of hermit crabs are recorded from the South China Sea. Information pr... more One hundred and two species of hermit crabs are recorded from the South China Sea. Information presented is from published references to the species. Most of the species are widely distributed in the Indo-West Pacific.
Proceedings of The Biological Society of Washington, 2008
During a survey of the biodiversity of the southeastern part of Espiritu Santo, Vanuatu Archipela... more During a survey of the biodiversity of the southeastern part of Espiritu Santo, Vanuatu Archipelago, specimens of a tiny but distinctive new hermit crab species, referable to a new genus, were discovered in the shallow waters off the island. Herein, Pumilopagurus tuberculomanus new genus, new species, is described and illustrated. The genus is characterized by the development of a massive right cheliped, more than 0.7 total body length; male with a short left sexual tube directed from left to right across the ventral body surface and very short right sexual tube; and female with single left gonopore. Its relationship to other pagurid genera of comparable small body size is discussed.
Fourteen species of hermit crab families Coenobitidae, Diogenidae and Paguridae are reported from... more Fourteen species of hermit crab families Coenobitidae, Diogenidae and Paguridae are reported from the terrestrial, littoral and shallow subtidal habitats in Anambas and Natuna Islands, Indonesia. Almost all species are widely distributed in the Indo-West Pacific. Only Diogenes spinicarpus Rahayu & Forest, 1995, has limited distribution, so far reported only from Indonesian waters.
During a faunal study of the shallow coral reefs in Indonesia, two species of the hermit crab gen... more During a faunal study of the shallow coral reefs in Indonesia, two species of the hermit crab genus Pagurus, which show remarkable affinities in morphology and coloration, were recognized. One of them is the little known species, P. moluccensis , which was known only by the holotype from Maluku region in Indonesia. The second is described herein as new, P. fungiformis, new species. Pagurus moluccensis is fully redescribed and illustrated in order to supplement the original description and to facilitate comparison with the new species. The strongly bispined interocular lobe immediately separates P. moluccensis and the new species from other known species of Pagurus. The new species is readily distinguished from P. moluccensis by the possession of closely set, flattened, marginally denticulate tubercles on the palms of chelae and brush-like setae on the dactylus and propodus of the left third pereopod. In P. moluccensis, the chelae are armed with small, simple or bifid tubercles on the dorsal surface; the left third pereopod lacks brush-like setae. These two species are assigned to the anachoretus group of Pagurus. Definition of this informal species group is reviewed and emended to accommodate the two species discussed in this study and P. decimbranchiae.
The day-to-day variations of the foF2 values in the Equatorial Ionization Anomaly (Sumedang 6.90 ... more The day-to-day variations of the foF2 values in the Equatorial Ionization Anomaly (Sumedang 6.90 S, 107.50E) are studied in both temporal and frequency domain. Then, the long period (2-20 days) oscillations that appeared in the Equatorial Ionization Anomaly are compared with the occuring planetary-scale waves in the neutral wind in the equatorial mesosphere observed at Pontianak (0.03N, 109.33E) that is located at nearly the same longitude as Sumedang. This paper attempts to compare the two kinds of oscillations that were observed at just the same time and and at nearly the same longitude.
In this paper we describe an ongoing project which develops an automated residential Demand Respo... more In this paper we describe an ongoing project which develops an automated residential Demand Response (DR) system that attempts to manage residential loads in accordance with DR signals. In this early stage of the project, we propose an approach for identifying individual appliance consumption from the aggregate load and discuss the effectiveness of load disaggregation techniques when total load data also includes appliances that are unmonitored even during the training phase. We show that simple discriminative methods can directly predict the appliance states (e.g. on, off, standby) and the predicted state can be used to calculate energy consumed by the appliances. We also show that these methods perform substantially better than the generative models of energy consumption that are commonly used. We evaluated the proposed approach using publicly available REDD data set, and our experimental evaluation demonstrates the improvement in accuracy.
... Kamora Island, 8M/2000, 2 males, 1.85 and 2.1 mm, 1 female, 1.7 mm, coll. DL Rahayu (PTFI-132... more ... Kamora Island, 8M/2000, 2 males, 1.85 and 2.1 mm, 1 female, 1.7 mm, coll. DL Rahayu (PTFI-132). ... Reise der ?sterreichischen Fregatte Novara um die Erde, in den Jahren 1857-58-59, unter den Befehlen des Commodors B. von W?llerstorf-Urbair, (Zool.), 2 (3): 1-280. ...
Two new species and a new distributional record of the sesarmine crabs of the genus Perisesarma a... more Two new species and a new distributional record of the sesarmine crabs of the genus Perisesarma are recorded from a mangrove area in southwestern Irian Jaya, Indonesia. Perisesarmaforesti sp. nov. and P. cricotus sp. nov. can be most easily separated from their congeners by the number, shape, and ornamentation of the cheliped dactylar tubercles. Perisesarma cricotus is also recorded from Ambon, eastern Indonesia. Perisesarma semperi (Btirger,. 1894) is a first record for Indonesia and marks a significant southerly range extension. Deux especes nouvelles sont decrites et une nouvelle reference geographique des crabes Sesarminae Perisesarma est fournie a partir de specimens recoltes sur Ia cote sud-occidentale de I'Irian Jaya, Indonesie. Perisesarma foresti sp. nov. et P. cricotus sp. nov. peuvent etre differenciees de leurs congeneres par le nombre, Ia forme et l'ornementation des tubercules du dactyle du chelipede. Perisesarma cricotus est aussi signa1e d' Ambon, Indonesie orientale. Perisesarma semperi (Btirger, 1894) est trouve pour 1a premiere fois en lndonesie, indiquant une extension significative de sa presence vers 1e sud. chophorum De Man, 1895, and additionally included Sesarma dussumieri A. Milne-Edwards, 1853, in the new subgenus. De Man (1888: 175) had earlier included 3) Former address:
One hundred and two species of hermit crabs are recorded from the South China Sea. Information pr... more One hundred and two species of hermit crabs are recorded from the South China Sea. Information presented is from published references to the species. Most of the species are widely distributed in the Indo-West Pacific.
Proceedings of The Biological Society of Washington, 2008
During a survey of the biodiversity of the southeastern part of Espiritu Santo, Vanuatu Archipela... more During a survey of the biodiversity of the southeastern part of Espiritu Santo, Vanuatu Archipelago, specimens of a tiny but distinctive new hermit crab species, referable to a new genus, were discovered in the shallow waters off the island. Herein, Pumilopagurus tuberculomanus new genus, new species, is described and illustrated. The genus is characterized by the development of a massive right cheliped, more than 0.7 total body length; male with a short left sexual tube directed from left to right across the ventral body surface and very short right sexual tube; and female with single left gonopore. Its relationship to other pagurid genera of comparable small body size is discussed.
Fourteen species of hermit crab families Coenobitidae, Diogenidae and Paguridae are reported from... more Fourteen species of hermit crab families Coenobitidae, Diogenidae and Paguridae are reported from the terrestrial, littoral and shallow subtidal habitats in Anambas and Natuna Islands, Indonesia. Almost all species are widely distributed in the Indo-West Pacific. Only Diogenes spinicarpus Rahayu & Forest, 1995, has limited distribution, so far reported only from Indonesian waters.
During a faunal study of the shallow coral reefs in Indonesia, two species of the hermit crab gen... more During a faunal study of the shallow coral reefs in Indonesia, two species of the hermit crab genus Pagurus, which show remarkable affinities in morphology and coloration, were recognized. One of them is the little known species, P. moluccensis , which was known only by the holotype from Maluku region in Indonesia. The second is described herein as new, P. fungiformis, new species. Pagurus moluccensis is fully redescribed and illustrated in order to supplement the original description and to facilitate comparison with the new species. The strongly bispined interocular lobe immediately separates P. moluccensis and the new species from other known species of Pagurus. The new species is readily distinguished from P. moluccensis by the possession of closely set, flattened, marginally denticulate tubercles on the palms of chelae and brush-like setae on the dactylus and propodus of the left third pereopod. In P. moluccensis, the chelae are armed with small, simple or bifid tubercles on the dorsal surface; the left third pereopod lacks brush-like setae. These two species are assigned to the anachoretus group of Pagurus. Definition of this informal species group is reviewed and emended to accommodate the two species discussed in this study and P. decimbranchiae.
The day-to-day variations of the foF2 values in the Equatorial Ionization Anomaly (Sumedang 6.90 ... more The day-to-day variations of the foF2 values in the Equatorial Ionization Anomaly (Sumedang 6.90 S, 107.50E) are studied in both temporal and frequency domain. Then, the long period (2-20 days) oscillations that appeared in the Equatorial Ionization Anomaly are compared with the occuring planetary-scale waves in the neutral wind in the equatorial mesosphere observed at Pontianak (0.03N, 109.33E) that is located at nearly the same longitude as Sumedang. This paper attempts to compare the two kinds of oscillations that were observed at just the same time and and at nearly the same longitude.
In this paper we describe an ongoing project which develops an automated residential Demand Respo... more In this paper we describe an ongoing project which develops an automated residential Demand Response (DR) system that attempts to manage residential loads in accordance with DR signals. In this early stage of the project, we propose an approach for identifying individual appliance consumption from the aggregate load and discuss the effectiveness of load disaggregation techniques when total load data also includes appliances that are unmonitored even during the training phase. We show that simple discriminative methods can directly predict the appliance states (e.g. on, off, standby) and the predicted state can be used to calculate energy consumed by the appliances. We also show that these methods perform substantially better than the generative models of energy consumption that are commonly used. We evaluated the proposed approach using publicly available REDD data set, and our experimental evaluation demonstrates the improvement in accuracy.
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Papers by Dwi Rahayu