fowler nordheim field emission from quantum confined optoelectronic semiconductors in the presence of intense electric field

THE ACOUSTOMAGNETOELECTRIC CURRENT OF a RECT ANGULAR QUANTUM WIRE WITH AN INFINITE POTENTIAL IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD

Ngày tải lên : 30/10/2015, 20:58

... I in the RQW with an infinite potential in the presence of an external magnetic field The dependence of the expression for the AME current I on acoustic wave numbers qz and on the parameters of ... Eq.(5), the first term is the expression of the density of the acoustoelectric current and the second term is the expression of the density of the AME current If the external magnetic field does ... being the mass of free electron In the figure 1, we show the dependence of the AME current on the acoustic wave number qz with the area of cross-sectional a = b = 100˚ A, the intensity of the...

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ON THE HALL EFFECT IN PARABOLIC QUANTUM WELLS WITH AN IN PLANE MAGNETIC FIELD IN THE PRESENCE OF a STRONG ELECTROMAGNETIC WAVE (LASER RADIATION)

Ngày tải lên : 31/10/2015, 10:41

... nonparabolicity of distribution functions of carriers In [11, 12], the magnetoresistance was derived in the presence of a strong EMW (laser field) for two cases: the magnetic field and the electric field of ... using Hamiltonian (4) and the procedures as in the works [9-14], we obtain the quantum kinetic equation for electrons in the single (constant) scattering time approximation Then utilizing the ... shows the dependence of the HC on the external fields, including the EMW It is obtained for arbitrary values of the indices N ′ and N We can see that the analytical result appears very involved In...

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THE INFLUENCE OF ELECTROMAGNETIC WAVE ON THE RELATIVE MAGNETORESISTANCE IN QUANTUM WELLS WITH PARABOLIC POTENTIAL IN THE PRESENCE OF MAGNETIC FIELD

Ngày tải lên : 31/10/2015, 10:43

... the case of the RMR in the bulk semiconductor when the confinement frequency (ωo ) reaches to zero The Eq.(23) shows the dependence of the RMR on the external fields, including the EMW In the next ... → The frequency of the acoustic phonon is low so we can skip ω− q in the delta function in the Eq.(5) Considering the distribution of phonons to be symmetric, in the presence of the magnetic field, ... CONCLUSIONS In this paper, we studied the influence of electromagnetic wave on the RMR in the quantum well with parabolic potential in the presence of the magnetic field The electronphonon interaction...

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NCKH BLACK CARBON EMISSION FROM RICE STRAW OPEN BURNING IN SOME PROVINCES OF THE RED RIVER DELTA

Ngày tải lên : 10/05/2016, 10:44

... Compare the results of the two approaches Figure BC emission in three provinces for two approaches The difference between two approaches due to the homogeneity of the communes in the province, including ... for Ninh Binh + In approach 2: 0.425 Gg/year in Ha Noi, 0.085 Gg/year in Vinh Phuc and 0.106 Gg/year in Ninh Binh - The difference between two approaches due to the homogeneity of communes in the ... 0.332 0.374 The best etimation for fraction burned in the fields is 80% in Hanoi, 60% in Vinh Phuc, and 50% in Ninh Binh 25 3.2 Estimate BC emission Approach 1: Use BC emission per capita of commune...

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Tài liệu Báo cáo khoa học: Suppressed catalytic efﬁciency of plasmin in the presence of long-chain fatty acids Identiﬁcation of kinetic parameters from continuous enzymatic assay with Monte Carlo simulation ppt

Ngày tải lên : 18/02/2014, 17:20

... identify the site of action of the fatty acids in the plasmin molecule, the amidolytic activity of two truncated plasmin variants was examined (Fig 8) Miniplasmin (des-kringle 1-4 plasmin) contains the ... resulted in a decrease, of up to two-fold, in the kp of plasmin Considering the recently described reversible nature of the plasmin inhibition by oleic acid [3] and the changes of the kinetic parameters ... catalytic action of plasmin in the presence of stearate The p-nitroaniline (P) released in the course of hydrolysis of 40 lM Spectrozyme-PL by 20 nM plasmin in the presence of 115 lM stearate is...

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Báo cáo khoa học: Crystal structure of salt-tolerant glutaminase from Micrococcus luteus K-3 in the presence and absence of its product L-glutamate and its activator Tris pdf

Ngày tải lên : 06/03/2014, 09:22

... determined the F structure containing the truncated region of the C-terminal domain; however, we failed to determine the structure of the intact glutaminase because the crystals exhibited heavy twinning ... report the crystal structure of the intact glutaminase under four different conditions: in the absence of the additives (referred to as N); in the presence of Tris (referred to as T); in the presence ... 428 aa; nine aa in total) were located near the interface of the physiological dimer The Cterminal domain may contain structural features involved in protein–protein interactions to form the physiological...

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báo cáo hóa học: " Topological confinement in an antisymmetric potential in bilayer graphene in the presence of a magnetic field" pptx

Ngày tải lên : 21/06/2014, 02:20

... arise from the continuum of free states It is seen that the spectrum of confined states is very weakly influenced by the magnetic field That is a consequence of the strong confinement of the states ... For the kink-antikink case, the overlap between the states associated with each confinement region allows the formation of Landau orbits Therefore, in contrast to the single kink profile, the ... y-component of the wavelength ky = ky l and (b,d) the external magnetic field B0 The inset in (a) shows the wavespinors for kyl = proximity of an antikink induces a strong dependence of the states on the...

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fowler-nordheim field emission effects in semiconductor nanostructures

Ngày tải lên : 29/05/2014, 16:25

... 221 230 Fowler Nordheim Field Emission from QuantumConfined Optoelectronic Semiconductors in the Presence of Intense Electric Field Field Emission from Quantum- Confined Optoelectronic Semiconductors ... results In the same chapter, the FNFE from carbon nanotubes in the presence of intense electric field and the importance of the measurement of band-gap of optoelectronic materials in the presence of ... Contents Fowler Nordheim Field Emission from QuantumConfined III–V Semiconductors in the Presence of Light Waves Field Emission from Quantum- Confined III–V Semiconductors in the Presence of Light...

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THE PARAMETRIC TRANSFORMATION COEFFICIENT OF CONFINED ACOUSTIC AND CONFINED OPTICAL PHONONS IN THE RECTANGULAR QUANTUM WIRE

Ngày tải lên : 30/10/2015, 20:00

... low-dimensional semiconductors, we, in the paper, examine dependence of the parametric transformation coefficient of confined acoustic and confined optical phonons in the rectangular quantum wire II THE QUANTUM ... (c is the light velocity, Ω is EMW frequency, E0 is amplitude of the laser field) The Hamiltonian of the electron -confined acoustic phonon -confined optical phonon system in the rectangular quantum ... transformation coefficient of confined acoustic and confined optical phonon in rectangular quantum wire be the same as parametric transformation coefficient of unconfined acoustic and unconfined optical phonon[9]...

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Removal of arsenic from synthetic groundwater by adsorption using the combination of laterite and ironmodified activated carbon

Ngày tải lên : 05/09/2013, 09:38

... determine an appropriate LA/AC-Fe ratio, the value of V/WACFe (V, the volume of drinkable water produced from the start using adsorbents until breakthrough / WACFe, the weight of AC-Fe in the column) ... is also possible to realize that the longer the portion of AC-Fe, the higher the adsorbent cost Therefore, optimizing the AC-Fe portion in the column is one of the key factors for a feasible arsenic ... shown in the value of r2 for both LA and AC-Fe In other words, this shows the applicability of the pseudosecond order kinetic model in predicting arsenic adsorption process onto LA and AC-Fe Indeed,...

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Tài liệu Báo cáo khoa học: A novel nuclear DNA helicase with high speciﬁc activity from Pisum sativum catalytically translocates in the 3¢ﬁ5¢ direction docx

Ngày tải lên : 20/02/2014, 11:20

... the amount of enzyme that unwinds 30% of the DNA helicase substrate at 37 °C in 30 (1% in one min) For examining the effect of DNA-interacting compounds on DNA unwinding activity of PDH120, the ... in the unwinding reaction Under these conditions, there was no inhibition of the unwinding reaction (data not shown) This further conﬁrmed that the inhibition was due to the formation of an inhibitor– ... not inhibited by actinomycin C1 [22] Actinomycin C1, a polypeptide containing the properties of an antibiotic, intercalates into dsDNA and thereby inhibits nucleic acid synthesis [23] Nogalamycin...

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Tài liệu Báo cáo khoa học: Crystal structure of thiamindiphosphate-dependent indolepyruvate decarboxylase from Enterobacter cloacae, an enzyme involved in the biosynthesis of the plant hormone indole-3-acetic acid doc

Ngày tải lên : 20/02/2014, 11:20

... responsible for binding and proper orientation of the aminopyrimidine ring, are conserved in all ThDP-dependent enzymes One of these, the hydrogen bond between the N1¢ atom of the pyrimidine ring of ThDP ... enzymes Substrate binding site and catalytic residues The active site cavity in IPDC extends from the thiazolium ring of the cofactor to the surface of the protein The entrance of the active site ... structure Binding of the cofactors ThDP and Mg2+ The homo-tetrameric IPDC binds four molecules of the cofactors ThDP and Mg2+ The ThDP binding sites are located in narrow clefts at the interfaces...

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Tài liệu Báo cáo Y học: The b-1,4-endogalactanase A gene from Aspergillus niger is speciﬁcally induced on arabinose and galacturonic acid and plays an important role in the degradation of pectic hairy regions pdf

Ngày tải lên : 21/02/2014, 01:21

... construct containing galA and some of the ﬂanking regions, resulting in the genomic sequence of A niger galA The presence of one putative intron was conﬁrmed by RTPCR using total RNA of A niger mycelium ... under the control of the xylanolytic activator protein [32,41] The increase in expression levels of galA in the CREA mutant, indicates that at least one of the detected putative CREA binding sites ... components of sugar beet pectin [1], whereas the others served as controls Expression of galA in the wild type strain was only detected in the presence of D-galacturonic acid (Fig 3) However, in the...

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Tài liệu Báo cáo Y học: Identiﬁcation of a set of genes involved in the biosynthesis of the aminonucleoside moiety of antibiotic A201A from Streptomyces capreolus pdf

Ngày tải lên : 21/02/2014, 01:21

... implicated in the biosynthesis of the aminonucleoside moiety of A201A Here we report the sequencing of a total of 6946 bp, which include the ata genes most likely implicated in the biosynthesis of this ... implicated in the biosynthesis of the aminonucleoside moiety of puromycin [6–8] Interestingly, their organization is identical to that of the pur cluster, with the exception of pur6, which is absent from ... [33,34] In contrast, its similarity to type III PKSs, which lack this domain, is scant This domain promotes the binding of the acyl-CoA initiation unit to the ketosynthetase domain of the PKSs...

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Tài liệu Báo cáo Y học: Antibacterial and antifungal properties of a-helical, cationic peptides in the venom of scorpions from southern Africa pptx

Ngày tải lên : 21/02/2014, 15:20

... enabling the disruption of the outer membrane and facilitating the interaction of the toxin with the inner membrane In the presence of high Mg2+ ions, the MIC of compounds that are taken up via the ... anoplin [37] The spectra of parabutoporin in the presence of vesicles resemble those in the presence of 40% triﬂuoroethanol and indicate that parabutoporin can adopt an a-helical structure in the ... present, thereby conﬁrming the presence of two different isoforms From the observed masses combined with the sequence information, the mass of the C-terminal fragment was deduced (544.3 Da) The fraction...

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Tài liệu Báo cáo khoa học: "From HOPE en I''''ESPERANCE On the Role of Computational Neurolinguistics in Cross-Language Studies " pptx

Ngày tải lên : 21/02/2014, 20:20

... t is the in interaction of the results of these asynchronous processes that the process of comprehension is defined 4.1 The processes are independent of the knowledge representations defined ... slowing of processing relative to on-line word recognition Studying the results of such "lesions" and their occurrence or not in pathological behavior is used to further understanding of the ... activation of a l l meanings of each recognized word in HOPE, the determination of the phonetic representation of a recognized word determines the breadth of active competition amon meanings for...

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**TYING ODYSSEUS TO THE MAST: EVIDENCE FROM A COMMITMENT SAVINGS PRODUCT IN THE PHILIPPINES* pot**

Ngày tải lên : 06/03/2014, 10:20

... We interpret the choice of the immediate reward in either of the frames as “impatient.” We interpret the choice of the immediate reward in the near-term frame combined with the choice of the ... bank in Mindanao in the Philippines First, independently of the Green Bank, we administered a household survey of 1777 existing or former clients of the bank We asked hypothetical time discounting ... steal from their wives), women are better off saving in a ROSCA than at home They ﬁnd that women’s bargaining power in the household, proxied by the fraction of household income that she brings in, ...

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Integrated Analysis of Data from MRC Fisheries Monitoring Programmes in the Lower Mekong Basin

Ngày tải lên : 14/03/2014, 08:47

... diversity The advantage of this index is that it takes into account the number of species and the evenness of the species The index is increased either by having additional unique species, or by having ... dependencies in the indices through space and time in an attempt to reveal the extent of fish migrations and the location of spawning areas in the basin, as well as to improve understanding of the life-cycles ... providing important indicators of the status and trends of floodplain-dependent fisheries resources in Cambodia There is currently no compelling evidence of a decline in the biomass index for the...

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Báo cáo khoa học: Structures of type B ribose 5-phosphate isomerase from Trypanosoma cruzi shed light on the determinants of sugar speciﬁcity in the structural family ppt

Ngày tải lên : 15/03/2014, 00:20

... their equivalents in the other subunit of the second dimer (Fig 4A) In the case of P21212 (TcRpiB-R5P), the four molecules in the asymmetric unit represent the tetramer The two active sites of ... Arg141¢ The other end of the substrate points into a deep pocket in the enzyme Moving along the ligand from the phosphate, O4 interacts with His102¢ and a water molecule that is in turn within hydrogen-bonding ... stages in the biological cycle of the parasite (i.e the epimastigote and the metacyclic trypomastigote in the insect vector, and the intracellular amastigote and the bloodstream trypomastigote in the...

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Báo cáo Y học: The role of zinc in the methylation of the coenzyme M thiol group in methanol:coenzyme M methyltransferase from Methanosarcina barkeri New insights from X-ray absorption spectroscopy doc

Ngày tải lên : 17/03/2014, 23:20

... ligand in all zinc-containing MtaA proteins [i.e 2.0 (N/O) plus (S)] We interpret these results as indicating the binding of the thiol sulfur of HS-CoM to the zinc atom of MtaA in a way that it ... Ala, the pronounced changes in the EXAFS spectra resulting from HS-CoM addition are indicative of an increase in the number of sulfur ligands (visual inspection of Fig 1C) Thus, in both mutants the ... Ala the HS-CoM binding results in sulfur ligation to the active-site zinc XANES spectra of wild-type and mutants As shown in the following, the interpretation of the EXAFS of the mutant enzymes...

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