Pub Date : 1978-12-31DOI: 10.1515/9783112585740-007
{"title":"Anmerkungen","authors":"","doi":"10.1515/9783112585740-007","DOIUrl":"https://doi.org/10.1515/9783112585740-007","url":null,"abstract":"","PeriodicalId":122783,"journal":{"name":"50 Jahre Chemiefaserstoffe","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132727894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1978-12-31DOI: 10.1515/9783112585740-002
Asma Amraoui, Wassila Baghli
Résumé—La radio cognitive est née du besoin d’introduire de l’intelligence et de la flexibilité dans la gestion des ressources spectrales devenues de plus en plus précieuses avec la prolifération rapide de standards et services de radiocommunication. Elle propose d'exploiter d’une manière dynamique et opportuniste les bandes de fréquences inutilisées durant l'absence des utilisateurs prioritaires. Dans ce papier, nous proposons une nouvelle approche qui utilise la radio cognitive pour améliorer la fiabilité du lien sans fil pour un terminal mobile. Nous présentons également des scénarios d’utilisation de la radio cognitive pour améliorer la fiabilité du lien sans fil pour une application de visioconférence et nous montrons à travers une expérimentation l’intérêt de notre approche.
{"title":"II.","authors":"Asma Amraoui, Wassila Baghli","doi":"10.1515/9783112585740-002","DOIUrl":"https://doi.org/10.1515/9783112585740-002","url":null,"abstract":"Résumé—La radio cognitive est née du besoin d’introduire de l’intelligence et de la flexibilité dans la gestion des ressources spectrales devenues de plus en plus précieuses avec la prolifération rapide de standards et services de radiocommunication. Elle propose d'exploiter d’une manière dynamique et opportuniste les bandes de fréquences inutilisées durant l'absence des utilisateurs prioritaires. Dans ce papier, nous proposons une nouvelle approche qui utilise la radio cognitive pour améliorer la fiabilité du lien sans fil pour un terminal mobile. Nous présentons également des scénarios d’utilisation de la radio cognitive pour améliorer la fiabilité du lien sans fil pour une application de visioconférence et nous montrons à travers une expérimentation l’intérêt de notre approche.","PeriodicalId":122783,"journal":{"name":"50 Jahre Chemiefaserstoffe","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130025013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1978-12-31DOI: 10.1515/9783112585740-fm
{"title":"Frontmatter","authors":"","doi":"10.1515/9783112585740-fm","DOIUrl":"https://doi.org/10.1515/9783112585740-fm","url":null,"abstract":"","PeriodicalId":122783,"journal":{"name":"50 Jahre Chemiefaserstoffe","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126477644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1978-12-31DOI: 10.1515/9783112585740-001
A. Mangoud, K. A. Ali
The green lacewing, Chrysoperla carnea Steph (Neuroptera: Chrysopidae) was successively released (with three levels), 5, 10 and 15 larvae/tree at late April, late May and late June 2006 and repeated in the same times during 2007 at Gharbia Governorate. During the first season (2006), the reduction percentages in the population of the citrus mealybug, Planococcus citri (Risso) increased gradually with elapse of time. The achieved average reductions in mealybug population were 66.08, 82.75 and 98.66% at the end of July for the three releasing levels, respectively in the first year (2006). However, the same trend was achieved in the second season (2007) and reduction percentages were 56.14, 80.86 and 93.92%, respectively. Statistical analysis revealed differences in responses to the three successive releasing levels of C. carnea for management P. citri during 2006 an 2007 seasons that proved no significant among the two seasons. The present work has shown that C. carnea can use successfully as a biocontrol agent in an integrated program for controlling P. citri attacking citrus trees.
{"title":"I.","authors":"A. Mangoud, K. A. Ali","doi":"10.1515/9783112585740-001","DOIUrl":"https://doi.org/10.1515/9783112585740-001","url":null,"abstract":"The green lacewing, Chrysoperla carnea Steph (Neuroptera: Chrysopidae) was successively released (with three levels), 5, 10 and 15 larvae/tree at late April, late May and late June 2006 and repeated in the same times during 2007 at Gharbia Governorate. During the first season (2006), the reduction percentages in the population of the citrus mealybug, Planococcus citri (Risso) increased gradually with elapse of time. The achieved average reductions in mealybug population were 66.08, 82.75 and 98.66% at the end of July for the three releasing levels, respectively in the first year (2006). However, the same trend was achieved in the second season (2007) and reduction percentages were 56.14, 80.86 and 93.92%, respectively. Statistical analysis revealed differences in responses to the three successive releasing levels of C. carnea for management P. citri during 2006 an 2007 seasons that proved no significant among the two seasons. The present work has shown that C. carnea can use successfully as a biocontrol agent in an integrated program for controlling P. citri attacking citrus trees.","PeriodicalId":122783,"journal":{"name":"50 Jahre Chemiefaserstoffe","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126458074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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