18 research outputs found

    Two newly recorded genera Tolongia and Yamatolygus of the mirine plant bugs (Hemiptera: Heteroptera: Miridae) from the Korean Peninsula

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    Two genera of the plant bug in the subfamily Mirinae (Hemiptera: Heteroptera: Miridae) are newly reported from the Korean Peninsula with discoveries of Tolongia pilosa Yasunaga, 1991 and Yamatolygus insulanus Yasunaga, 1994. The male genital structure of T. pilosa is remarked. Female genitalia of Y. insulanus is described for the first time. Morphological information such as diagnoses is also provided. Keywords: Mirinae, New record, The Korean Peninsula, Tolongia, Yamatolygu

    Model Predictive Control Based Path Tracking and Velocity Control with Rollover Prevention Function for Autonomous Electric Road Sweeper

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    This paper presents a model predictive control (MPC)-based algorithm for rollover prevention of an autonomous electric road sweeper (AERS). For AERS, the basic function of autonomous driving is a path- and velocity-tracking control needed to make a vehicle follow given path and velocity profiles. On the other, the AERS adopts an articulated frame steering (AFS) mechanism which can make cornering behavior agile. Moreover, the tread of the AERS is narrow, and the height of the mass center is high. As a result, it is prone to roll over. For this reason, it is necessary to design a controller for path and velocity tracking and rollover prevention in order to improve maneuverability and roll safety of the AERS. A kinematic model was adopted as a vehicle one for the AERS. With the vehicle model, reference states of position and velocity were determined that are needed to make the AERS track the reference path and prevent rollover. With the vehicle model and reference states, an MPC-based motion controller was designed to optimize articulation angle and velocity commands. The load-transfer ratio (LTR) was used to measure a rollover propensity. To evaluate the proposed algorithm, a simulation was conducted for the U-turn scenario. Simulation results show that the proposed algorithm improves path tracking and prevents the rollover of the AERS

    Pachycoleus Fieber 1860

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    Genus <i>Pachycoleus</i> Fieber, 1860 <p> <i>Pachycoleus</i> Fieber, 1860: 268 (downgraded by Linnavuori, 1984: 20; upgraded by Pluot-Sigwalt & Péricart, 2003: 130). Type species: <i>Pachycoleus waltli</i> Fieber, 1860.</p> <p> <i>Note:</i> The genus <i>Pachycoleus</i> is sometimes mentioned as a subgenus of <i>Cryptostemma</i>, but many recent works considered that this genus is valid (Aukema <i>et al.</i>, 2013; Weirauch & Štys, 2014; Weirauch & Fernandes, 2015).</p> <p> <b>Diagnosis:</b> Differs from other genera by small body, not exceeding 2 mm or around 2 mm; absence of male abdominal appendages anterior to segment VIII (presence of appendages on only segment VIII); and spermatheca simple, positioned at left side of 7th abdominal segment, not reaching lateral margin, not embraced by a loculus capsulae in female.</p>Published as part of <i>Kim, Junggon, Kim, Wongun, Park, Jihwan & Jung, Sunghoon, 2019, First record of family Dipsocoridae (Hemiptera: Heteroptera: Dipsocoromorpha) from the Korean Peninsula and a new generic combination for Cryptostemma japonicum Miyamoto, pp. 195-200 in Zootaxa 4577 (1)</i> on page 196, DOI: 10.11646/zootaxa.4577.1.13, <a href="http://zenodo.org/record/2628566">http://zenodo.org/record/2628566</a&gt

    First record of family Dipsocoridae (Hemiptera: Heteroptera: Dipsocoromorpha) from the Korean Peninsula and a new generic combination for Cryptostemma japonicum Miyamoto

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    Kim, Junggon, Kim, Wongun, Park, Jihwan, Jung, Sunghoon (2019): First record of family Dipsocoridae (Hemiptera: Heteroptera: Dipsocoromorpha) from the Korean Peninsula and a new generic combination for Cryptostemma japonicum Miyamoto. Zootaxa 4577 (1): 195-200, DOI: https://doi.org/10.11646/zootaxa.4577.1.1

    Model Predictive Control Based Path Tracking and Velocity Control with Rollover Prevention Function for Autonomous Electric Road Sweeper

    No full text
    This paper presents a model predictive control (MPC)-based algorithm for rollover prevention of an autonomous electric road sweeper (AERS). For AERS, the basic function of autonomous driving is a path- and velocity-tracking control needed to make a vehicle follow given path and velocity profiles. On the other, the AERS adopts an articulated frame steering (AFS) mechanism which can make cornering behavior agile. Moreover, the tread of the AERS is narrow, and the height of the mass center is high. As a result, it is prone to roll over. For this reason, it is necessary to design a controller for path and velocity tracking and rollover prevention in order to improve maneuverability and roll safety of the AERS. A kinematic model was adopted as a vehicle one for the AERS. With the vehicle model, reference states of position and velocity were determined that are needed to make the AERS track the reference path and prevent rollover. With the vehicle model and reference states, an MPC-based motion controller was designed to optimize articulation angle and velocity commands. The load-transfer ratio (LTR) was used to measure a rollover propensity. To evaluate the proposed algorithm, a simulation was conducted for the U-turn scenario. Simulation results show that the proposed algorithm improves path tracking and prevents the rollover of the AERS

    New records of genus Aradus Fabricius (Hemiptera: Aradidae) from Korea, with first male description of Aradus gretae Kiritshenko

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    Three species of genus Aradus Fabricius (A. betulae (Linnaeus), A. betulinus Fallén, and A. gretae Kiritshenko) are newly recognized from the Korean Peninsula. Photographs of habitus and diagnosis are presented for the newly recorded species. The male of Aradus gretae Kiritshenko is described for the first time. A checklist and key to species of the genus Aradus recorded from Korea are provided

    Brachymna tenuis Stål, 1861 (Hemiptera: Pentatomidae), a new invasive bamboo pest in Korea with notes on insects associated with bamboos

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    We report first observations of the invasive bamboo pest, Brachymna tenuis Stål, 1861 in Korea as the first species of Brachymna Stål, 1861 (Pentatomidae) reported from the country.Comments on its pest status and distribution are provided. General information on Bamboo-feeding insect in Korea is analysed and provided for the first time

    Newly recorded genus Pantilius Curtis (Hemiptera: Heteroptera: Miridae) from the Korean Peninsula, with a key to the world Pantilius species

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    A genus, Pantilius Curtis (Hemiptera: Heteroptera: Miridae: Mirinae), is reported for the first time from the Korean Peninsula, based on finding a species of Pantilius hayashii Miyamoto and Yasunaga, 1989, which was hitherto known only from Honshu, Japan. The morphological information, such as description and diagnosis, is presented with photographs and illustrations of adult habitus and male genitalia

    Taxonomic review of the genus Castanopsides Yasunaga (Hemiptera: Heteroptera: Miridae: Mirinae) from the Korean Peninsula

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    A genus Castanopsides Yasunaga (Hemiptera: Heteroptera: Miridae: Mirinae) is reviewed from the Korean Peninsula. Castanopsides falkovitshi (Kerzhner 1979) is reported for the first time. Descriptions of male genitalia, diagnoses, and a key to the Korean Castanopsides are provided with illustrations and photographs

    Additional record of Tuponia Reuter (Heteroptera, Miridae, Phylinae) from Korea, with a new synonym and discussion on distribution

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    BackgroundThe genus Tuponia Reuter, 1875 belongs to the subfamily Phylinae and comprises 91 species worldwide. Before this study, only T. koreana Kim & Jung had been recorded from the Korean Peninsula. New information Two species of Tuponia Reuter, 1910 are recognised from the Korean Peninsula including the first record of T. mongolica Drapolyuk, 1980. T. koreana Kim & Jung, 2021 is proposed as a junior synonym of T. chinensis Zheng & Li, 1992. The species is identified, based on the dorsal habitus and male and female genitalic structures. A brief discussion of the distribution of Korean Tuponia species also is presented.Y
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