Search results for "ESN"

How self-assembly of amphiphilic molecules can generate complexity in the nanoscale

2015

Abstract Given the importance of nanomaterials and nanostructures in modern technology, in the past decades much effort has been directed to set up efficient bottom up protocols for the piloted self-assembly of molecules. However, molecules are generally disinclined to adopt the desired structural organization because they behave according to their own specific intermolecular interactions. Thus, only some selected classes of chemical compounds are capable to lead to useful self-assembled structures. Amphiphiles, simultaneously possessing polar and apolar moieties within their molecular architecture, can give a wide scenario of possible intermolecular interactions: polar–polar, polar–apolar,…

Lensless object scanning holography for two-dimensional mirror-like and diffuse reflective objects

2013

Recently proposed lensless object scanning holography (LOSH) [Opt. Express 20, 9382 (2012)] is a fully lensless method capable of improving the image quality in digital Fourier holography applied to one-dimensional (1D) reflective objects and it involves a very simplified experimental setup. LOSH is based on the recording and digital postprocessing of a set of digital lensless Fourier transform holograms, which finally results in a synthetic image with improved resolution, field-of-view (FOV), signal-to-noise ratio (SNR), and depth of field. In this paper, LOSH is extended to the cases of two-dimensional (2D) mirror-like and 1D diffuse-based objects. For 2D mirror-like objects, the experime…

Real-time clothoid approximation by Rational Bezier curves

2008

This paper presents a novel technique for implementing Clothoidal real-time paths for mobile robots. As first step, rational Bezier curves are obtained as approximation of the Fresnel integrals. By rescaling, rotating and translating the previously computed RBC, an on-line Clothoidal path is obtained. In this process, coefficients, weights and control points are kept invariant. This on-line approach guarantees that an RBC has the same behavior as the original Clothoid using a low curve order. The resulting Clothoidal path allows any two arbitrary poses to be joined in a plane. RBCs working as Clothoids are also used to search for the shortest bounded-curvature path with a significant comput…

Tiesneša atbildība kā instruments taisnīgas tiesas nodrošināšanai

2017

Tā kā tiesa ir vienīgā institūcija, kurai ir tiesības spriest tiesu, svarīgi, lai tiesnesis būtu taisnīgs un tiktu nodrošinātas Satversmē garantētās pamattiesības uz taisnīgu tiesu. Personai ir tiesības uz lietas likumīgu izskatīšanu, ko nodrošina tieši tiesa (tiesnesis). Gan pildot amata pienākumus, gan arī ārpus darba tiesnesim ir jāievēro likumā paredzētās normas un tiesneša ētika. Spriežot tiesu tiesnesim nedrīkst būt savas intereses un viņš ir pakļauts vienīgi likumam. Tiesnesis nes atbildību par to, lai lietas dalībnieki tiktu pie taisnīga lietas iznākuma Likuma normu pārkāpuma gadījumos, tiesnesim jānes atbildība par savu rīcību, un viņš nav no tās atbrīvots. Bakalaura darba temats i…

Viesnīcas "Hotel Vantis" darbības analīze un attīstības perspektīvas

2016

Bakalaura darba ietvaros, autore, kura ir arī viesnīcas „Hotel Vantis” darbiniece, bija ieinteresēta izpētīt viesnīcas darbību un piedāvāt risinājumus „Hotel Vantis” darbības uzlabošanai. Lai labāk izprastu vai viesnīcas darbība ir veiksmīga vai nē, bija nepieciešams izpētīt arī Latvijas tūrisma nozari kopumā un statistiku par laika periodu 2012.-2014.gadam. Darba gaita izskatīti tūrisma nozares attīstības un kvalitātes noteikšanas institūciju - Latvijas viesnīcu un restorānu aģentūras, Tūrisma attīstības valsts aģentūras – darbības principi un uzdevumi, kā arī izpētītas pamatnostādnes tūrisma nozares attīstībai 2015.-2020.gadam. Veikta viesnīcas „Hotel Vantis” finanšu analīze, lai noskaidr…

Pasajes de París / 7: Su universo simbólico

2006

Treatment of Stage III-IV Non-Small-Cell Lung Carcinoma with Vinorelbine in Combination with Ifosfamide plus MESNA: A Study by the Southern Italy Onc…

1996

Thirty-five patients affected by stage III-IV non-small-cell lung carcinomas were treated with ifosfamide 3 gr/m2 plus MESNA as uroprotector on day 1 and vinorelbine 25 mg/m2 i.v. bolus on day 1 and 8. This cycle was repeated every 21 days. Over a total of 35 evaluable patients, the overall response rate was 34% (95% CL 18-54%). One patient experienced a complete response with a duration of 7.2+ months, and 11 patients a partial response with a mean duration of 5.9+ months. Seven patients had no change and 16 improved. The overall survival was 7.6+ months. Over a total of 145 cycles, the most frequent toxicity was myelosuppression, but grade 3 leukopenia and grade 2 thrombocytopenia were se…

The dependence of circular dichroism in photoemission on the optical properties of Cs monolayers on Pt(111)

1997

We report on the dependence of dichroic photoemission excited by circularly polarised light on the angle of photon incidence. We measured the difference in the angle-resolved photoemission intensities from Cs 5p semi-core levels excited by photons of opposite helicity, which is known as CDAD. We found that the dependence of the measured differences on the angle of light incidence deviates strongly from the model of CDAD for free atoms, as expected. Using the Fresnel equations and a complex index of refraction, one finds that not only the third component but also the second component of the Stokes vector is responsible for the excitation process. Both Stokes components change sign if the ini…

Fractional Fourier transform dual random phase encoding of time-varying signals

2008

Optical techniques have shown great potential in the field of information security to encode high-security images. Among several established methods, a double-random phase encryption technique (DRPE) for encoding a primary image into stationary white noise was developed by using the analogy between Fresnel diffraction patterns and the fractional Fourier transform (FrFT-DRPE). In this case, additional keys are obtained through the knowledge of the fractional orders of the FrFTs. In this work we propose an encoding setup for time-varying signals, mainly for short-haul fiber optics link applications, that can be considered as the temporal analogue of the spatial FrFT-DRPE. The behavior of the …

Parallel fractional correlation: an optical implementation

2008

An optical setup to obtain all the fractional correlations of a one-dimensional input in a single display is implemented. The system works as a multichannel parallel correlator for a continuous set of fractional orders and presents a variable shift variance. Some experimental results together with computer simulations are performed to illustrate the performance of our proposal.