Abstract. Mobile passive differential optical absorption spectroscopy measurements of SO2 and NO2 were performed in the Guangzhou eastern area (GEA) during Asian Games 2010 from November to December 2010. The observations carried out between 10:00 13:00 (local time, i.e., daylight). Spatial temporal distributions this obtained emission sources determined using wind field data. vertical column densities found agree with Ozone Monitoring Instrument values. correlation coefficient (referred as...

Abstract. In this paper, we present the custom Hong Kong NO2 retrieval (HKOMI) for Ozone Monitoring Instrument (OMI) on board Aura satellite which was used to evaluate a high-resolution chemistry transport model (CTM) (3 km × 3 spatial resolution). The atmospheric modelled in Pearl River Delta (PRD) region southern China by Models-3 Community Multiscale Air Quality (CMAQ) modelling system from October 2006 January 2007. HKOMI retrieval, tropospheric air mass factors (AMFs) were recalculated...

Microporous organic polymers (MOPs) encapsulated with palladium nanoparticles (NPs) and immobilized on magnetic Co/C nanobeads show excellent activity in hydrogenation reactions of alkenes, alkynes, nitro arenes turnover frequencies (TOFs) up to 3000 h–1. The core the ensures an easy fast recyclability for at least six consecutive runs by applying external magnet recapture catalyst. catalytic system reported here uses cross-linked toluene as a polymer structure is readily prepared via...

Abstract. In this study we present the first long term measurements of atmospheric nitrogen dioxide (NO2) using a LED based Long Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument. This instrument is measuring continuously in Hong Kong since December 2009, setup with 550 m absorption path and then 3820 at about 30 to 50 above street level. The high power blue light peak intensity 450 nm coupled into telescope Y-fibre bundle. LP-DOAS measures NO2 levels Kowloon Tong...

Abstract. The recent increase in spatial resolution for satellite instruments has made it feasible to study distributions of trace gas column densities on a regional scale. For this application new gridding algorithm was developed map measurements from the instrument's frame reference (level 2) onto longitude–latitude grid 3). is designed Ozone Monitoring Instrument (OMI) and can easily be employed similar – example, upcoming TROPOspheric (TROPOMI). Trace are reconstructed by continuous...

Abstract. In this study, we theoretically investigate the reconstruction of 2-D cross sections through Gaussian concentration distributions, e.g. emission plumes, from long path DOAS measurements along a limited number light paths. This is done systematically with respect to extension up four peaks and for six different measurement setups 2-4 telescopes 36 paths each. We distinguish between cases without additional background concentrations. Our approach parametrises unknown distribution by...

Abstract. The retrieval of tropospheric aerosol extinctions from MAX-DOAS observations O4 using a small number three or four extinction profile parameters suitable for boundary layer reconstruction is investigated with respect to the following questions. First, what extent does this nominally over-constrained pure least-squares problem inversion radiative transfer equation require regularisation and how should be chosen? Second, can lack information in under-constrained case best compensated...

Paper documents such as passports, visas and banknotes are frequently checked by inspection of security elements. In particular, optically variable devices holograms important, but difficult to inspect. Augmented Reality can provide all relevant information on standard mobile devices. However, hologram verification mobiles still takes long provides lower accuracy than human individuals using appropriate reference information. We aim address these drawbacks automatic matching combined with a...

Abstract Copper pigments promote the deterioration of paper objects; hence, it has been problematic to conservation since many valuable historical manuscripts contain copper green pigments. In particular, verdigris yields relatively mobile ions that can cause a higher risk degradation depending on relative humidity storage conditions. Although several research studies have demonstrated potential chemicals slow down with or pigments, passive treatments such as mechanical reinforcement...

Abstract Verdigris (copper acetate) has been frequently used in manuscripts, early printed books and on maps. Dyes pigments from plants have added to modify the colour. Depending mode of application, paper quality, size environmental factors like light humidity green colour verdigris can discolour brown tones chemically damage carrier. Treatment options include application solutions stabilize cellulose mechanical reinforcement brittle or broken papers with Japanese adhesives. Samples copper...

Smartphones have attracted a lot of interest recently as they are becoming more and computationally powerful platforms for all kinds tasks in mobile environments. Due to the availability high quality phone cameras, use these even critical applications leveraging Computer Vision techniques is justified. In this paper we present an application instant interactive medical pill detection recognition on phones. Our approach designed help trained or untrained personnel outside facilities perform...

Augmented Reality (AR) on mobile phones is receiving more and attention recently, becoming a popular research topic an important commercial field. In this paper we present lightweight method to create coarse 3D models of small-scale objects. The goal give the users possibility maintain AR content themselves without need for expensive tools complex interaction. Our algorithm based shape-from-silhouette using voxel carving runs modern smartphone hardware. certain object groups can be generated...

An airborne multi-axis differential optical absorption spectroscopic (AMAX-DOAS) instrument was developed and applied to measure tropospheric NO2 in the Pearl River Delta region south of China. By combining measurements nadir zenith directions analyzing UV visible spectral using DOAS method, information about vertical columns obtained. Strong signals were detected when flying over heavilly polluted regions point sources like plants. The AMAX-DOAS results compared with ground-based MAX-DOAS...

Visual search systems present a simple way to obtain information about our surroundings, location or an object of interest. Typically, mobile applications visual remotely connect large-scale capable dealing with millions images. Querying such may induce considerable delays, which can severeley harm usability even lead complete rejection by the user. In this paper, we investigate interim solution and system design using local for embedded devices. We optimized traditional decrease runtime...

Urinary Albumin Excretion and Vascular Function in Rheumatoid ArthritisRheumatoid arthritis (RA) is associated with significant cardiovascular (CV) morbidity mortality.Increased urinary albumin excretion a marker of CV risk.There are only few data on RA patients.Aim the present study was to investigate patients analyze, whether there an association between vascular function as measured by augmentation index (AIx).In total 341 participants (215 RA, 126 without RA) albumin-creatinine ratio...

Object detection and recognition algorithms are an integral part of the architecture many modern image processing systems employing Computer Vision (CV) techniques. In this paper we describe our work in area segmentation simple objects mobile phone imagery. Given several on a structured background, show how these can be segmented efficiently features extracted for further object classification. We prove presented useful given set test cases, that discussed used instant real-world application...

Paper documents such as passports, visas and banknotes are frequently checked by inspection of security elements. In particular, view-dependent elements holograms interesting, but the expertise individuals performing task varies greatly. Augmented Reality systems can provide all relevant information on standard mobile devices. Hologram verification still takes long causes considerable load for user. We aim to address this drawback first presenting a work flow recording automatic matching...

In this paper, we present a comparison of different light-emitting diodes (LEDs) as the light source for long path differential optical absorption spectroscopy (LP-DOAS) atmospheric trace gas measurements. our study, use fiberoptic design, where high power LEDs used are coupled into telescope using Y shape fiber bundle. Two blue and one ultraviolet (UV) with emission wavelength ranges tested NO2 SO2 The detailed description instrumental setup, retrieval procedure, error analysis, preliminary...