scholarly journals Diapause of Cameraria ohridella Deschka et Dimic and its impact on the species population dynamics

2012 ◽  
Vol 49 (No. 6) ◽  
pp. 252-258 ◽  
Author(s):  
T. Samek
Keyword(s):  
Regression Analysis ◽  
First Generation ◽  
Horse Chestnut ◽  
Third Generation ◽  
The Czech Republic ◽  
The Third ◽  
Species Population ◽  
Unfavourable Weather ◽  
Population Continuity ◽  
Actual Damage

Cameraria ohridella Deschka et Dimic is a polyvoltine species which can complete under suitable conditions the development of as many as three generations a year. In the Czech Republic, however, the third generation suffers from high mortality due to the shortage of food and later also unfavourable weather. If the third generation is not completed the population continuity is ensured by diapausing pupae occurring in each generation. The number of diapausing pupae is determined by the actual abundance of the species and thus also by the actual damage to the horse chestnut (Aesculus hippocastanum L.) foliage. Relationships of the parameters were investigated in the first generation of C. ohridella and their intensity was studied by methods of regression analysis.

The Brown Mite, Bryobia arborea Morgan and Anderson (Acarina: Tetranychidae), on Apple in Nova Scotia.: I. Influence of Intratree Distribution on the Selection of Sampling Units. II. Differences in Habits and Seasonal Trends in Orchards With Bivoltine and Trivoltine Populations. III. Distribution of Diapause Eggs. IV. Hatching of Diapause Eggs

1965 ◽  
Vol 97 (12) ◽  
pp. 1303-1318 ◽  
Author(s):  
H. J. Herbert
Keyword(s):  
Nova Scotia ◽  
First Generation ◽  
Second Generation ◽  
Central Area ◽  
Third Generation ◽  
Apple Trees ◽  
Seasonal Trends ◽  
Sample Unit ◽  
The Third ◽  
Selection Of

AbstractIn Nova Scotia one leaf cluster with an adjoining 1 inch of twig taken from the inside of each of 10 apple trees replicated four times is an adequate sample unit to measure the density of the brown mite.The brown mite has one generation with a partial second in some orchards and one with a partial second and partial third in others. The first generation adults in the bivoltine and trivoltine populations lay summer eggs on the leaves and twigs, and diapause eggs on tin twigs. The second generation adults in the bivoltine populations lay only diapause eggs; in the trivoltine populations they lay both summer and diapause eggs. The adults of the third generation lay only diapause eggs.The brown mite is found on both the leaves and woody parts of the tree. In orchards with bivoltine populations the proportion of mites on leaves reached a peak of 80% by mid-July, but thereafter gradually decreased to 10% by the end of August. However, in orchards with trivoltine populations the proportion of mites on leaves reached a peak of 80 to 90% by mid-July, remained constant until mid-August, and thereafter decreased to approximately 40% by the end of August.The number of diapause eggs laid by adults of each generation in both the bivoltine and trivoltine populations varies widely. The eggs are deposited on the trunk as well as on the branches, with the heaviest deposition in the central area of the tree. The diapause eggs laid by adults of the first generation are the last to hatch and those laid by the third generation are the first to hatch the following spring.The factors responsible for the differences in the number of generations and in the number of diapause eggs laid are unknown.

scholarly journals Philosophy from the outside in: Rosenzweig’s critical project

2012 ◽  
Vol 23 (2) ◽  
pp. 65-76
Author(s):  
Willi Goetschel
Keyword(s):  
First Generation ◽  
Martin Buber ◽  
Third Generation ◽  
Literary Modernism ◽  
The Third ◽  
Jewish Thought ◽  
Two Generations ◽  
The University ◽  
Critical Intervention ◽  
Hermann Cohen

This paper examines Rosenzweig?s philosophic project in the context of his time as a critical intervention in the discussion of the place of Jewish thought in the university and in society. If Hermann Cohen represented the first generation of Jewish philosophers claiming that participation in the university is constitutive for the institution?s claim to universalism, the second generation-represented by Martin Buber - was more diffident about the university and its openness. For Buber, literary modernism offered what the university would refuse. Disappointed about the failure of the recognition of the efforts of the previous two generations, Rosenzweig represents the third generation. He turns the situation into a creative response anchoring philosophy as a project that calls for a resolute move outside the university.

scholarly journals The Application of Third Generation Semiconductor in Power Industry

2020 ◽  
Vol 198 ◽  
pp. 04011
Author(s):  
Yuqian Zhang
Keyword(s):  
Future Development ◽  
First Generation ◽  
Rapid Development ◽  
Physical Characteristics ◽  
Third Generation ◽  
Power Switching ◽  
Advantages And Disadvantages ◽  
The Third ◽  
Great Possibility ◽  
Made In

With the rapid development of technologies, the third generation semiconductor is being studied, as it is leading to the significant change in industry like the manufacture of PC, mobile devices, lighting etc. Till now, due to its irreplaceable physical characteristics, third generation semiconductor is applied to lots of fields. This paper analyzes the application of third generation semiconductor, namely, GaN and SiC. Their characteristics including advantages as well as disadvantages will be discussed through reviewing the result of relevant researches. Meanwhile, comparison between the third generation semiconductors and the second as well as the first generation semiconductors is made in this paper. Through the comparison of physical characteristics, recent marketing, production and limitations, the advantages and disadvantages of each semiconductor is analyzed and the suggestion of how to avoid the disadvantage through application is proposed. At last, the future development is predicted. According to the analysis result of this paper, silicon poses more merits. Silicon is not only cheaper but also performs better making it a preference of GaAs, and GaN in the domain of IC. The second generation semiconductor, GaAs, is widely used in the circuits and photoelectric integration. Furthermore, the third semiconductor material GaN is a promising material for power switching and communication and has the great possibility to play a crucial role in market.

POPULATION TRENDS AND BEHAVIOR OF THE PEAR RUST MITE, EPITRIMERUS PYRI (PROSTIGMATA: ERIOPHYOIDEA), ON PEARS IN NOVA SCOTIA

1979 ◽  
Vol 111 (8) ◽  
pp. 955-957 ◽  
Author(s):  
H. J. Herbert
Keyword(s):  
Nova Scotia ◽  
First Generation ◽  
Growing Season ◽  
Ventral Surface ◽  
Third Generation ◽  
Economic Injury Level ◽  
The Third ◽  
Epidermal Tissue ◽  
Economic Injury ◽  
And Behavior

AbstractThe pear rust mite, Epitrimerus pyri (Nal.), overwinters in a semi-active state in old leaf scar crevices and under bud chips of the leaf clusters. It becomes active within the bud in mid-April, as soon as the weather warms, and passes through three generations in the growing season as indicated by distinct peak egg populations observed in May, June, and July. The first generation eggs are laid within the swelling bud. The mites feed on the ventral surface of the leaves causing bronzing and on the calyx end of the fruit resulting in russeting of the epidermal tissue. Deutogynes of the third generation begin to enter hibernation by mid-August. Occasionally population levels reach economic injury level resulting in the downgrading of fruit.

scholarly journals Dynamic cfDNA Analysis by NGS in EGFR T790M-Positive Advanced NSCLC Patients Failed to the First-Generation EGFR-TKIs

2021 ◽  
Vol 11 ◽  
Author(s):  
Li Ma ◽  
Haoyang Li ◽  
Dongpo Wang ◽  
Ying Hu ◽  
Mengjun Yu ◽  
...  
Keyword(s):  
First Generation ◽  
Univariate Analysis ◽  
Third Generation ◽  
T790m Mutation ◽  
The Third ◽  
Tki Treatment ◽  
Nsclc Patients ◽  
Next Generation Sequencing Ngs ◽  
Egfr Tkis

PurposeCirculating cell-free DNA (cfDNA) level has been demonstrated to be associated with efficacy in first generation EGFR TKIs in non-small cell lung cancer (NSCLC). However, the role of dynamic cfDNA analysis using next-generation sequencing (NGS) in patients with subsequent third-generation EGFR TKIs remains unclear.MethodsFrom 2016 to 2019, 81 NSCLC patients with EGFR T790M mutation either in tissue or plasma who received third-generation EGFR TKIs treatment were enrolled. CfDNA were sequenced by NGS with a 425-gene panel. The association of clinical characteristics, pretreatment, dynamic cfDNA and T790M level with outcomes in patients treated with the third-generation TKIs were analyzed.ResultsIn univariate analysis, the median PFS of patients with undetectable cfDNA level during treatment was significantly longer than those with detectable cfDNA (16.97 vs. 6.10 months; HR 0.2109; P < 0.0001). The median PFS of patients with undetectable T790M level during treatment was significantly longer than those with detectable T790M (14.1 vs. 4.4 months; HR 0.2192; P < 0.001). Cox hazard proportion model showed that cfDNA clearance was an independent predictor for longer PFS (HR 0.3085; P < 0.001) and longer OS (HR 0.499; P = 0.034). The most common resistant mutations of the third-generation TKIs were EGFR C797S (24%). CDK6 CNV, GRIN2A, BRCA2, EGFR D761N, EGFR Q791H, EGFR V843I, and ERBB4 mutation genes may possibly be new resistant mechanisms.ConclusionsPatients with undetectable cfDNA during the third-generation EGFR TKI treatment have superior clinical outcomes, and dynamic cfDNA analysis by NGS is valuable to explore potential resistant mechanisms.

scholarly journals Parameters of the seasonal cycle of Corythucha arcuata (Say, 1832) (Heteroptera: Tingidae) in the plains and foothills of the Northwestern Caucasus

2019 ◽  
pp. 101-128
Author(s):  
В.И. Щуров ◽  
А.С. Замотайлов
Keyword(s):  
First Generation ◽  
Second Generation ◽  
Egg Laying ◽  
Day Length ◽  
Fourth Generation ◽  
Third Generation ◽  
Degree Days ◽  
The Third ◽  
Female Immigrant ◽  
Northwestern Caucasus

Развитие первой генерации Corythucha arcuata в предгорьях и низкогорьях Северо-Западного Кавказа начинается в первых числах мая. При нижнем пороге пост-диапаузного развития имаго +11°С и при естественной длине дня ей требуется не менее 43 суток (аккумуляция 333-404 гр.-дн.). Гибель перезимовавших самок в этой зоне наблюдается к концу июня, совпадая с сокращением общей доли самок до 2-7%. В высокогорьях перезимовавшие имаго расселяются и в июне, доживая до июля на ивах и березах. Пик выхода имаго первого поколения приходится на конец июня. Массовая яйцекладка самками первого поколения (начало второго поколения) предваряется миграцией оплодотворенных самок на новые кормовые растения. Развитие преимагиальных стадий второго поколения (без смены кормовых растений) протекает с середины июня. Метаморфоз длится не менее 16-23 суток (361-430 гр.-дн.). Пик выхода имаго второго поколения в конце июля совпадает с массовым расселением, в котором всегда преобладают самки. Третье поколение развивается в августе. Метаморфоз занимает 19-28 суток (329-350 гр.-дн.). Пик выхода имаго третьего поколения приходится на первую декаду сентября. Его предваряет более ранний выход самцов, определяемый по их локальным и региональным миграциями с конца августа. Четвертое поколение является факультативным и развивается (без смены кормовых растений) с конца августа до третьей декады сентября. Развитие преимагиальных стадий этого поколения занимает не менее 26 суток (378 гр.-дн.). Последняя миграция клопов наблюдается в начале-середине октября. Самки третьего поколения первыми уходят в места зимовки в предгорьях и низкогорьях уже в середине сентября. Здесь, в дубовых лесах, зимуют имаго третьего и четвертого поколений обычно с преобладанием самок. В среднегорьях с ними могут зимовать особи-иммигранты второго поколения, но с преобладанием самцов, сохраняющимся с сентября. Development of the first generation of Corythucha arcuata in the climate of the foothills and lowlands of the Northwest Caucasus starts in the early May. With a natural day length and the threshold for post-diapause imago development of 11 °C, it requires 333-404 degree-days and at least 43 days. The death of the overwintered females in this zone is observed by the end of June, coinciding with the reduction of the total portion of females to 2-7%. In the highlands imagoes are dispersing in June as well, surviving until July on willows and birch trees. Peak of the first-generation imago outcome occurs at the end of June. Migration of fertilized females of the first generation to new forage plants is followed by mass egg laying (i.e. beginning of the second generation). During the formation of large nests in the foothills, the flight of bugs is observed even in treeless highlands. Development of the preadult stages of the second generation (without changing feed plants) takes place starting at mid-June. Metamorphosis requires 361-430 degree-days and takes at least 16-23 days. The peak of the emergence of the second generation imagoes at the end of July coincides with their dispersal, which is also dominated by females. The third generation develops in August. It requires 329-350 degree-days and takes 19-28 days. The peak of the emergence of the G3 imagoes falls on the first third of September. It is preceded by anearlier emergence of males, determined by their mass local and regional migrations since the end of August. The fourth generation is obligated and develops (without changing feed plants) from the end of August to the end of September. It requires at least 378 degree-days and takes at least 26 days. Late nymphs resulting from female immigrant of the third generation (on new trees) give imagoes only by mid-October. The last migration of bugs is observed in early to mid-October. Imagoes of the third and fourth generations with the predominance of females hibernate in the oak forests of the foothills and low-mountain. In the midlands they may be accompanied by the overwintering immigrants of the second generation, with the predominance of males, formed in September.

scholarly journals SURAT BERHARGA GENERASI KETIGA: MODEL BARU INSTRUMEN TRANSAKSI GIRAL

2014 ◽  
Vol 8 (2) ◽  
pp. 179-194
Author(s):  
Sri Dwiyatmi
Keyword(s):  
Foreign Exchange ◽  
First Generation ◽  
Third Generation ◽  
New Model ◽  
The Third ◽  
Previous Generation ◽  
Commercial Code ◽  
Legal Construction

AbstrakPerkembangan Instrumen surat berharga sungguh luar biasa, secara bertahap terasakan sejak tahun 1980. Perkembangan tersebut menyangkut jenis, sifat dan ciri. Perkembangan tersebut seperti lepas dari rumahnya yaitu hukum surat-surat berharga (KUHD) sebagaikaidah yang mengaturnya. Perkembangan ini perlu dicermati apakah sampai pada terjadi perubahan bangunan hukumnya dengan adanya model instrumen generasi ketiga ini? Perbedaan utama pada generasi ketiga terletak antara lain pada latar belakang penerbitan,tujuan penerbitan, mekanisme penerbitan, jenis instrumen serta fungsi dan klausula. Perbedaan ini menjadikan surat berharga generasi ketiga ini sebagai model baru yang secara prinsip sebenarnya kehilangan sifat dan ciri sebagai surat berharga dalam pengertian KUHD, sekaligus terjadi perubahan konsep sebagai instrumen surat berharga/transaksi giral, dengan perbedaan dominan sifat dan cirinya seperti tersebut diatas. AbstractSince 1980, the securities instruments has developed in a remarkable way. The development included the change in the type, nature and characteristics of securities. This paper intends to examine whether the development of the instruments of securities also include the changes in the legal construction of securities. The development of securities instruments that creates securities of third generation is characterized by the emergence of two categories of instruments, namely foreign exchange instruments (swaps, spot, forward) and nonforeign exchange (credit-linked notes). The so-called third generation securities has different properties and characteristics compared to the first generation of securities regulated in the Indonesian Commercial Code. This difference, among others, are in the background of issuance, issuance mechanisms, types of instruments, functions and clauses. This difference makes the third generation of securities as a new model that deviates from the previous generation of securities within the meaning the Indonesian Commercial Code.

Introduction

1980 ◽  
Vol 25 (S1) ◽  
pp. vii-xxii
Author(s):  
J. K. Chambers
Keyword(s):  
Social Sciences ◽  
First Generation ◽  
Graduate Programs ◽  
Great Majority ◽  
National Consciousness ◽  
Third Generation ◽  
Canadian Universities ◽  
The Third ◽  
The Social ◽  
The Way

Nature leads the way. Man emerges on the scene, follows her footprints, marks and registers them in language, and makes a Science of Nature. Then he looks back and discovers that Language, while following the path of Nature, has left a trail of her own. He returns on this new trail, again marks and registers its footprints, and makes a Science of Language.The Birth of Language (1937)The great majority of linguists in Canada today belong to only the second academic generation of linguists in Canadian universities. Members of the first generation are, of course, still active—in some cases more active than the younger members of their departments. They are characterized, roughly, as founding members of the Canadian Linguistic Association, or as members of long standing. They are also characterized in a few cases as having been the teachers of junior members of the profession, although this is less often the case than it is in other disciplines, partly because there have been very few graduate programs in Linguistics until recently, and partly because there has been little demand for linguists trained in the specialty of the first generation anyway, which is almost unanimously dialect geography, and partly because there has been a decided tendency toward hiring non-Canadians in the social sciences to fill positions in Canadian universities. Now, with the increase in graduate programs in Linguistics, the more diverse specializations, and the national consciousness that Canadian universities can also be served by Canadians, the third generation of linguists will increasingly be selected from the students of the present academic generation, which is how academic generations have been gauged in other cultures for centuries.

scholarly journals Design Features in Multiple Generations of Electronic Cigarette Atomizers

2019 ◽  
Vol 16 (16) ◽  
pp. 2904 ◽  
Author(s):  
Monique Williams ◽  
Prue Talbot
Keyword(s):  
First Generation ◽  
Solder Joints ◽  
Electronic Cigarette ◽  
Third Generation ◽  
Design Features ◽  
Multiple Generations ◽  
The Third ◽  
Design Changes ◽  
Over Time ◽  
Thick Wire

The design of electronic cigarette (EC) atomizing units has evolved since their introduction over 10 years ago. The purpose of this study was to evaluate atomizer design in ECs sold between 2011–2017. Atomizers from 34 brands representing three generations of ECs were dissected and photographed using a stereoscopic microscope. Five distinct atomizer design categories were identified in first generation products (cig-a-like/cartomizer) and three categories were found in the third generation. Atomizers in most cig-a-like ECs contained a filament, thick wire, wire joints, air-tube, wick, sheath, and fibers, while some later models lacked some of these components. Over time design changes included an increase in atomizer size; removal of solder joints between wires; removal of Polyfil fibers; and removal of the microprocessor from Vuse. In second and third generation ECs, the reservoirs and batteries were larger, and the atomizing units generally lacked a thick wire, fibers, and sheath. These data contribute to an understanding of atomizer design and show that there is no single design for ECs, which are continually evolving. The design of the atomizer is particularly important as it affects the performance of ECs and what transfers into the aerosol.

Moving Toward a Third Generation of Medical Education

2021 ◽  
pp. 926-939
Author(s):  
Wendy M. Green
Keyword(s):  
Medical Education ◽  
First Generation ◽  
Health Professions ◽  
The United States ◽  
Health Professions Education ◽  
Third Generation ◽  
Education Programs ◽  
The Third ◽  
Transformative Approach ◽  
Issue Health

The number of health professions education programs continues to increase across the United States and globally, but unequal access to healthcare remains a pressing issue. Health professions education has shifted from a first-generation approach, centered on didactic teaching, to a second-generation approach, centered on problem-based learning. In a Lancet paper, Frenk and colleagues argued for the incorporation of a transformative paradigm within health professions education facilitating the move towards the third generation of health professions education. Drawing on Mezirow and Freire, they argued for the incorporation of a transformative paradigm to improve health professions education by better aligning medical education and population needs. This chapter examines how a transformative approach to health professions education could be implemented and where it would be most effective. It also looks at how a transformative paradigm within health professions education could provide an additional lens to understand health disparities, structural inequity, and diversity.

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