NEW DESCRIPTIONS OF LARVAE OF FOREST INSECTS: SEMIOTHISA, DYSMIGIA (LEPIDOPTERA, GEOMETRIDAE)

1947 ◽  
Vol 79 (6) ◽  
pp. 113-116 ◽  
Author(s):  
W. C. McGuffin
Keyword(s):  
Transition Period ◽  
Larval Instar ◽  
Larval Period ◽  
The Other ◽  
Forest Insects ◽  
Other Hand ◽  
Larval Moult

Some geometrid larvae exhibit dimorphism in colour. Several interesting observations of this phenomenon were made during the study of larvae of the species, Semiothisa sexmaculata Pack., Dysmigia loricaria Evers., and Nepytia canosaria Wlk.In these observations, certain points stand out. Although larvae of S. sexmaculata are always green until they reach the last instar, both brown and green phases occur in that stage. After the last larval moult, a transition period of approximately two days is required for larvae to acquire the colouring of the brown phase. On the other hand, specimens of D. loricaria may pass their entire larval period in either a brown or a green phase (as do the larvae of N. canosaria, descriptions of which may be found in Can. Ent. 75: 186-189) or they may change (as do some larvae of S. sexmaculata) from the green phase to the brown phase in the last larval instar. For Dysmigia larvae to undergo this transformation, approximately three days are required.

scholarly journals The efficiency of Paecilomyce farinosus as biocontrol to larve stage on second ad sixith instar larve of Trogoderma granarium (Everts)

2013 ◽  
Vol 10 (4) ◽  
pp. 1096-1101
Author(s):  
Baghdad Science Journal
Keyword(s):  
Larval Instar ◽  
The Other ◽  
Biocontrol Agents ◽  
Larval Instars ◽  
Paecilomyces Farinosus ◽  
Trogoderma Granarium ◽  
Laboratory Conditions ◽  
Other Hand ◽  
Laboratory Results ◽  
Treatment Concentration

The present study was conducted to determine the pathogenicity of Paecilomyces farinosus as biocontrol agents against Tragoderma granarium (khapra) under laboratory conditions with three concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml). The laboratory results revealed that fungi showed it's higher pathogencity to larve stage on 2nd instar and 6th instar , although their capability differs according to the fungi concentrations this fungi caused higher mortality of 2nd larval instar 70% and 60% ,55% when it was used at concentrations 2 .8 x 106 ,2.8 x104 spores/ ml respectively. On the other hand on 6th larval instars 55% , 35% , 30% at concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml) respectively, and the highest rate of distortions in the adult insects from the 2nd instar treatment than the adult insects from the 6th instar treatment concentration of this fungi.

scholarly journals Suburbanisation characteristics in the vicinity of Riga after transition

2020 ◽  
Vol 18 ◽  
pp. 20-27
Author(s):  
Toms Skadins ◽  
Keyword(s):  
Spatial Structure ◽  
Transition Period ◽  
The Other ◽  
Clear Cut ◽  
Other Hand

After the fall of socialism, the most pronounced changes in the spatial structure of the population have been caused by suburbanisation. These changes have been especially notable since the end of the transition period. Therefore, the aim of this research was to characterise the features of suburbanisation in the vicinity of Rīga after transition. Characteristics of suburbanisation were analysed based on the share of and number of people moving out of Rīga among all people moving. This was done for two periods – 2000 to 2011, and 2011 to 2019 – “the second of which has been less studied. The results showed that there were significant differences between the three share groups – a high proportion often went hand in hand with a large number of suburbanites. On the other hand, the differences between agglomeration and non-agglomeration areas were less clear-cut, as there were significant differences in the number of people previously living in Rīga and its changes, while there were no significant differences in the share for the first stage and share changes.

scholarly journals On the role of aerosols, humidity, and vertical wind shear in the transition of shallow to deep convection at the Green Ocean Amazon 2014/5 site

2018 ◽  
Author(s):  
Sudip Chakraborty ◽  
Kathleen A. Schiro ◽  
Rong Fu ◽  
J. David Neelin
Keyword(s):  
Wind Shear ◽  
Transition Period ◽  
Deep Convection ◽  
Vertical Wind Shear ◽  
Vertical Wind ◽  
Department Of Energy ◽  
The Other ◽  
Free Troposphere ◽  
Shallow Convection ◽  
Other Hand

Abstract. The preconditioning of the atmosphere for a shallow-to-deep convective transition during the dry-to-wet season transition period (August–November) is investigated using Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) GoAmazon2014/5 campaign data from March 2014 to November 2015 in Manacapuru, Brazil. In comparison to conditions observed prior to shallow convection, anomalously high humidity in the free troposphere and boundary layer is observed prior to a shallow-to-deep convection transition. An entraining plume model, which captures this leading dependence on lower-tropospheric moisture, is employed to study indirect thermodynamic effects associated with vertical wind shear (VWS) and cloud condensation nuclei (CCN) concentration on pre-convective conditions. The shallow-to-deep convective transition primarily depends on humidity, especially that from the free troposphere, which tends to increase plume buoyancy. Conditions preceding deep convection are associated with high relative humidity, and low-to-moderate CCN concentration (less than the 67th percentile, 1274 cm−3). VWS, on the other hand, shows little relation to moisture and plume buoyancy. Buoyancy estimates suggest that the latent heat release due to freezing is important to deep convective growth under all conditions analyzed, consistent with potential pathways for aerosols effects, even in presence of a strong entrainment. Shallow-only convective growth, on the other hand, shows an association with a strong (weak) low (deep) level VWS and with higher CCN concentration.

scholarly journals The Policy of Non-Cash Food Aid Program (BPNT)

2020 ◽  
Vol 14 (3) ◽  
pp. 453
Author(s):  
I Putu Cakra Putra Adnyana ◽  
Sabar Untung
Keyword(s):  
Program Effectiveness ◽  
Transition Period ◽  
The Other ◽  
Food Aid ◽  
Research Needs ◽  
Direct Impact ◽  
Government Program ◽  
Other Hand ◽  
The Government ◽  
The Impact

The RASTRA Program ended in 2019 replaced by the Non-Cash Food Aid Card (BPNT). There were two important things in the BPNT program, which were free to choose the type of rice and prices that change from time to time. When the policy was not well prepared, it can trigger high prices and many speculators appeared that affected the price and stock of rice on the market. On the other hand, Bulog had prepared a change of strategy in distributing rice to the community. This certainly had a direct impact on the community or Bulog itself. So that research needs to be done with the aim to find out the benefits of the BPNT program for the community and its impact on the Bulog. The research aim was to determine the benefits of the BPNT program for the community and the impact of the program on the National Logistics Agency (Bulog). The scope of the activity was reviewing the results of studies or research related to Bulog. The data collected through deskstudy then analyzed descriptively. The government program was able to reduce the expense load of beneficiary families and provide more balanced nutrition on target, on time, increase program effectiveness and encourage financial inclusion among grassroots communities, but on the other hand during the transition period in 2019 Bulog endures losses due to the BPNT program, So we need the support from all stakeholders to solve these problems.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Life Beyond 1MeV

1980 ◽  
Vol 38 ◽  
pp. 30-33
Author(s):  
K.H. Westmacott
Keyword(s):  
Electron Microscopy ◽  
Past Experience ◽  
The Other ◽  
Good Case ◽  
Other Hand ◽  
The U.S

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.

Can the Academic Self-Concept be Positive and Realistic?

2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann
Keyword(s):  
Academic Performance ◽  
Opposite Effect ◽  
Self Esteem ◽  
Point Of View ◽  
The Other ◽  
Self Concept ◽  
High Ability ◽  
Self Image ◽  
Other Hand

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.

Stories and the Self

2020 ◽  
Vol 32 (2) ◽  
pp. 47-58 ◽  
Author(s):  
Stefan Krause ◽  
Markus Appel
Keyword(s):  
Meta Analysis ◽  
The Self ◽  
The Other ◽  
Lower Degree ◽  
Contrast Effects ◽  
Self Perception ◽  
Self Perceptions ◽  
Other Hand ◽  
The One ◽  
Implicit And Explicit

Abstract. Two experiments examined the influence of stories on recipients’ self-perceptions. Extending prior theory and research, our focus was on assimilation effects (i.e., changes in self-perception in line with a protagonist’s traits) as well as on contrast effects (i.e., changes in self-perception in contrast to a protagonist’s traits). In Experiment 1 ( N = 113), implicit and explicit conscientiousness were assessed after participants read a story about either a diligent or a negligent student. Moderation analyses showed that highly transported participants and participants with lower counterarguing scores assimilate the depicted traits of a story protagonist, as indicated by explicit, self-reported conscientiousness ratings. Participants, who were more critical toward a story (i.e., higher counterarguing) and with a lower degree of transportation, showed contrast effects. In Experiment 2 ( N = 103), we manipulated transportation and counterarguing, but we could not identify an effect on participants’ self-ascribed level of conscientiousness. A mini meta-analysis across both experiments revealed significant positive overall associations between transportation and counterarguing on the one hand and story-consistent self-reported conscientiousness on the other hand.

Don’t Put Me in This Group

2019 ◽  
Vol 50 (2) ◽  
pp. 80-93
Author(s):  
Jort de Vreeze ◽  
Christina Matschke
Keyword(s):  
Positive Emotions ◽  
Negative Emotions ◽  
Negative Information ◽  
The Self ◽  
The Other ◽  
Other Hand ◽  
Group Memberships

Abstract. Not all group memberships are self-chosen. The current research examines whether assignments to non-preferred groups influence our relationship with the group and our preference for information about the ingroup. It was expected and found that, when people are assigned to non-preferred groups, they perceive the group as different to the self, experience negative emotions about the assignment and in turn disidentify with the group. On the other hand, when people are assigned to preferred groups, they perceive the group as similar to the self, experience positive emotions about the assignment and in turn identify with the group. Finally, disidentification increases a preference for negative information about the ingroup.

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