Parlance Points represent

Parlance Points represent selleck products points-of-interest (POI) as collected by the ��human sensor��. Especially the ��who��, ��what�� and ��where�� facets will be elaborated upon. Finally, we discuss the results of this experiment and directions for further development.2.?ILBS: Digital Dowsing RodIn the ��Digital Dowsing Rod�� [20] project, Inhibitors,Modulators,Libraries a consortium developed and tested an interactive location-based service. This service provides cultural-historic landscape information in two ways: from narratives and from facts and figures. The Digital Dowsing Rod (DiWi) is location-based and service-oriented. It can be used to reveal the hidden history of a landscape to visitors and provide them with cultural-historical information that is detectable in the surrounding landscape, using broadly available devices.

The HTC P3600 was selected as mobile device. This smart phone (PDA) has GPS, UMTS/HSDPA for data transmission, and audio-video record and display functions. With the pilot application, Inhibitors,Modulators,Libraries a ��thin�� mobile client, users are served by a tailor-made user interface. The user interface resembles information based on different data types. This information consists of maps, walking and biking routes and point-of-interest (POI) locations that are all indicated on these maps, multimedia presentations of cultural-historic information and personal experiences in text, photo, audio and video formats linked to the POIs (Figure 1). By using the smart phone, visitors can explore a landscape and its cultural history using various levels of freedom.

This freedom is important Inhibitors,Modulators,Libraries because modern tourists are capable of defining their own needs and preferences. They are not always satisfied with the ��travel agent��s standard offer��. Modern tourists want to have it all, but not at the same time and not at the same spot. Diversity Inhibitors,Modulators,Libraries has become a new keyword in tourism planning [23]. For that reason a DiWi-user can choose from different modes: (a) a predefined trail with historical accounts (b) a personalized route based on personal preferences including related personal historical accounts and (c) a forage through the landscape that takes for granted whatever historical information will be encountered. Furthermore the DiWi application provides the opportunity to record, store and upload personal location based experiences via text processing, voice recording or photo/video camera.

Users can generate their own POIs and share them immediately with other users reaching these locations. This makes the DiWi application an informal iLBS.Figure 1.Web browser interface and mobile client interface of iLBS.Figure AV-951 2 shows the outline selleck chemicals Idelalisib of the Service Oriented Architecture (SOA) of the Digital Dowsing Rod. This four-tier architecture consists of three clients: (a) web client, (b) mobile client and (c) content management system client (CMS).

The area and the height of the resulting

The area and the height of the resulting different groups relative to neighbouring Inhibitors,Modulators,Libraries terrain points will be used for building hypothesis generation with the help of thresholds that define the minimum area and height of the buildings in the study area. Figure 2a�Cd shows an example of an aerial image patch, corresponding LiDAR data, classified terrain and off-terrain points, and building hypotheses, respectively. The different shades of grey in Figure 2(d) indicate different building hypotheses.Figure 2.A dataset with complex and connected structures: (a) aerial photo; (b) LiDAR data; (c) classified terrain and off-terrain points; (d) generated building hypotheses; (e) building primitives; and (f) initial boundaries of the building primitives.A generated building hypothesis might be composed of several connected planar patches.

Therefore, Inhibitors,Modulators,Libraries the segmentation procedure suggested by [14] is carried out to break each building hypothesis down into a group of building primitives (i.e., planar patches constituting rooftops). The segmentation procedure is based on a voting scheme that keeps track of the point attributes, as defined by a local plane through its neighbouring points, in an accumulator array. While globally assessing the frequency of the local attributes in the parameter space together with the proximity of the points in the object space at the same time, the points belonging to differ
The transition from ��macro�� to ��micro�� and recently to ��nano�� has been noticeable in many scientific fields. In biology, the evolution towards research into the micro- and nanobiotic world has led to the identification of many disease-related pathogens.

In the technological field, Inhibitors,Modulators,Libraries the progression Inhibitors,Modulators,Libraries from electronics into micro- and nano-electronics has enabled the miniaturisation of computers. Combining the enormous advances in biology with those attained in micro- and nano-electronics has laid the groundwork to study biology on a single molecule level and to embark into the ��nano��-world. In this context, nanometer-scale AV-951 biomolecules have become an integrated component of electronic devices designed for early, reliable and affordable detection of target molecules. Hence, the development of these biosensors has been a pivotal point in the evolvement of this new ��bio-electronics�� field. In the next paragraph, we will describe the different parts in biosensor construction.

For more detail, the reader is referred to the that work in [1].1.1. Biological Receptor MoleculesThe type of biological receptor molecule determines the bio-selectivity, and hence the type of biosensor. Enzymes recognise their substrates and will convert it to a reaction product. The associated biosensors are termed ��catalytic or enzyme biosensors��. Other molecules identify their targets by forming an affinity-complex governed by hydrogen (H) bonds, hydrophobic interactions, electrostatic forces, and ��van der Waals�� forces. Seperately, these non-covalent bonds are very weak.

Removing one of the filters reduces the time needed to filter dup

Removing one of the filters reduces the time needed to filter duplicate readings without reducing the accuracy and efficiency of the filtering results. By reducing the number of tasks, the new algorithm increases Deltarasin? the efficiency and makes the approach less complicated. Second, the current algorithm incorporates an enhanced landmark window in the duplicate filtering process. This landmark window will remove all data when a specific point is met.The rest of the paper is organized as follows: Section 2 presents the background of the problem which includes system model and problem formulation. Section 3 discusses the related work. The proposed algorithm is described in detail in Section 4. Section 5 presents the performance analysis of the proposed algorithm.
The results in this section show that the proposed approach significantly outperforms existing approaches. The conclusion and future directions is presented in Section 6.2.?Background2.1. System ModelA typical RFID system consists of a transponder (i.e., tag), which is attached to the object to be identified, an interrogator (i.e., reader) that creates an RF field for detecting radio waves, the middleware and a backend database system for maintaining expanded information on the objects and other associated information. The middleware collects and processes the readings from readers for the use of enterprise applications and enterprise database. The process such as filtering and aggregation transform raw data into meaningful information for the application.
The middleware also coordinates reader activities, ensures reliability in data transmission, improving network communications and allowing heterogeneous devices to collaborate together [11].The tag is capable of storing the identifying information of the object to which it is attached and communicate the information via radio waves to an interrogator. RFID tags, based on their power sources, are generally classified as passive, active and semi-active tags. The active and semi GSK-3 active tags have their own power source whereas the passive tags forage power from the waves sent out by readers. The semi-active tags may also scavenge power from the readers. In this paper, we focus on passive tags. Relative to both active and semi-active tags, passive tags are very cheap and they are widely used in very large quantities in many applications such as supply chain management.
The RFID system is assumed to contain multiple research use networked RFID readers deployed to collaboratively collect data from tagged objects in their vicinity. The reading distance ranges from a few centimeters to more than 300 feet, depending on factors such as interference from other RF devices. The RFID readers query tags to obtain data and forward the resulting information through the middleware to the backend applications or database servers.

The optically modulated signal is applied to each sensor located

The optically modulated signal is applied to each sensor located at different places (here, L1 to LN). Then, the wavelength band corresponding to each sensor is selected by each FBG and selleck kinase inhibitor enters the dispersion compensation fiber (DCF) as a wavelength-to-time conversion module of dispersive medium. The dispersive medium shows different propagation velocities according to the wavelength of the light. When a strain is applied to FBG 2 as shown in Figure 1, the corresponding wavelength shift (����) is converted into a time shift (�Ӧ���) in the appearance time of the autocorrelation peak. Finally, by reading the difference in arrival time, this technique can provide a wider dynamic range than the conventional methods reading the peak value.Figure 1.
Conceptual diagram of FBG-based sensor network using sliding correlation and DCF as a function of wavelength-to-time conversion.In general, a narrow optical source like a distributed feedback laser diode (DFB-LD) can be used in a CDMA sensor network. However, in this case, the maximum number of FBG sensors installed in a serial line is limited by the transmission coefficient of each FBG. We can slice the spectrum of the DFB-LD and assign one portion to each sensor. Nevertheless, this has a limitation in the available sliced spectrum. Furthermore, narrow wavelength spacing between the sensors might induce channel crosstalk. Therefore, we use a broadband light source like an RSOA to secure a large dynamic range according to the wavelength change.
RSOA is a special type of semiconductor optical amplifier (SOA), which has a high reflective (HR) coating on one facet and an anti-reflective (AR) coating on the other facet to produce a highly versatile gain medium. Although its waveguide structure is similar to a conventional SOA, the RSOA has a lot of different optical properties, such as low noise figure and high optical gain at low drive current. The scanning time of proposed sensor network is determined by:TS=n��f(1)where n is the bit length of the PRBS code and ��f is the frequency difference between the two PRBSs applied to the source and the mixer. Additionally, the autocorrelation pulse width is defined as:TW=2��f(2)Therefore, the maximum number of sensors available without inter-symbol interference is limited by the optical source bandwidth and the PRBS pattern length 2Ts/Tw (=n).
The scanning effect associated with the sliding correlation can be explained as follows: AV-951 to prevent autocorrelation of the unwanted pattern, a random signal (here a PRBS) is used. In a PRBS signal, example the probability of repeating the same pattern within one period of scan is almost zero. Hence, insofar as the reflected lights from all sensors are within one period of scan, each sensor can be identified with a random pattern. Moreover, by giving a slightly different frequency to one (here connected to the mixer), a scanning effect is given to each sensor.3.?Experiment and Results3.1.

A stochastic process Et with t as an integer number, is denominat

A stochastic process Et with t as an integer number, is denominated as strongly stationary if any set of times Ruxolitinib msds t1,t2 and any integer k the joint probability distributions of Et1,��,Etn and Et1+k,��,Etn+kcoincide, in other words, when there is correlation between both distributions. Before to calculate the autocorrelation function is necessary obtain some statistical parameters considering each arc emission E(t,��) as
Optical Coherence Tomography (OCT) has been widely accepted as a non-invasive high resolution imaging modality for in vivo biological specimens [1]. After the emergence of spectral domain OCT (SD-OCT) and swept source OCT (SSOCT), the real time imaging and displaying feature has become one of the major competing categories [2�C4].
Real time displaying feature is another key parameter to deliver the OCT technology to clinical and industrial fields because dynamic changes of the targets are often screened by human vision. Current real-time video-rate display is commonly limited to displaying OCT intensity images. Phase information related to flowing objects requires a significant post-processing effort, and also most flow dynamics require high speed acquisition to trigger certain interesting events. The need for real-time display of Doppler frequency shift images is urgently required for monitoring flow samples, but such a feature has not been reported yet.Recent commercialization for massive parallel processing units provides an easily adaptable solution to this problem.
Recently developed Graphics Processing Units (GPUs) enable very fast processing of OCT signals, but also can execute parallel, general purpose numerical solutions surpassing the use of CPUs. Several years ago NVIDIA Corporation presented a parallel computing architecture named Compute Unified Device Architecture (CUDA) commonly adapted in computer games for more natural presentation of sceneries. Use of GPUs in the OCT research field for fast display of intensity images has been reported several times [5�C8]. In this paper, we report a novel ultra-fast displaying Spectral Domain Optical Doppler Tomography (SD-ODT) by use of CUDA processes for real-time display of OCT intensity and Doppler images simultaneously at a frame rate of 120 fps for a 2,048 �� 512 pixel image size.2.?System Configuration Dacomitinib and Signal Processing ArchitectureThe schematic diagram of the developed SD-OCT system is shown at Figure 1.
A 12-bit CMOS line scanning camera (Sprint spL2048-140 k, Basler AG) with 70,000 line/s effective line rate at 2,048 pixel mode was used as the detector of the SD-OCT system. The transmission type diffraction grating (Spatial Frequency 1,800 lpmm, Nominal AOI/AOD 46.05 Degrees, Wasatch Photonics) was adapted to enhance light efficiency in the detection nevertheless path.

Meanwhile, the position of the resonant wavelength can be obtaine

Meanwhile, the position of the resonant wavelength can be obtained.In our experiment, the structure parameters are as follows: the refraction index of the grating layer is nh = 1.98 (HfO2); nl = nc = 1.0 (air); the grating period �� is 500 nm; the substrate selleck products refraction index ns is 1.52 (quartz glass); the refraction index of the waveguide layer is nw = 1.98 (HfO2). According to these parameters, the range of the resonant wavelength we got to be 760 < �� < 990. Here, we choose �� = 800 nm. The anti-reflective conditions require the thicknesses of the waveguide layer and the grating layer to be one quarter-wavelength to optimize the structure. The thickness of the waveguide layer dw is 101 nm and the grating layer dg is 120 nm. At this point, all the structure parameters of the GMRF biosensor have been determined and are summarized in Table 1.
Table 1.Parameters of the GMR biosensor.3.?Results and DiscussionBased on the GMR structure we designed in the previous section, the electric field distribution can be obtained using the RCWA method. Here, a comparison of biosensor sensitivity for the TE and TM modes based on the distribution of electric fields is presented. According to the RCWA method, the resonant wavelength of incident light in the TE mode is 798 nm without a biological sample attached on the surface, while the resonant wavelength of the TM mode is 766 nm. Because the sensitivity of this biosensor is related to the full width at half maximum (FWHM), FWHM should be discussed. The FWHM can be observed via the electric field distribution.
Figure 2(a) presents the electric field distribution of the TE mode for the resonant wavelength of 798 nm. We can see that the strongest electric field excited in the waveguide layer is 5times greater than that in the weakest part of the field. When the resonant wavelength shifts 10 nm, which is from 798 nm to 788 nm or 808 nm, the electric field distributions are shown in Figure 2(b,c), respectively, which still show a strong guided-mode resonance effect where the strongest part is 4 to 3.5 times greater than the weakest part of the field. With Entinostat the wavelength changed by 20 nm to 778 nm and 818 nm, the electric field distributions are shown in Figure 2(d,e), respectively. However, the GMR effect is very weak. In particular, at the wavelength of 818 nm in Figure 2(e), it is difficult to discern any guided-mode resonance effect.
Figure 2.Electric field distribution of TE mode at different wavelengths. (a) Electric field distribution selleck chemicals Crenolanib at the wavelength of 798 nm with TE mode incident into the GMRF. (b) Wavelength at 788 nm. (c) Wavelength at 808 nm. (d) Wavelength at 778 nm. (e) Wavelength …In contrast, when illuminated with incident light in the TM mode, the electric field distribution calculated by the RCWA method is shown in Figure 3.Figure 3.Electric field distribution of TM mode at different wavelengths.

With the above practical consideration, Equation (1) may be modif

With the above practical consideration, Equation (1) may be modified as:Iout(����)=Inon+Iabs=�Ʀ�,nonI0(��non)+�Ʀ�,absI0(��abs)exp(?��(��abs)CL)(2)where Iout(����) is the total intensity over the wavelength range of the NBP filter, Inon represents the total intensity Paclitaxel molecular weight from the wavelengths where methane does not absorb within ����, and Iabs represents the total intensity at the wavelengths where methane absorbs. Moreover, the IR light source is typically driven with a square wave voltage supply, consequently the IR detector outputs a signal with a sinusoidal or triangular-like waveform, and the peak-to-peak voltage amplitude Vp-p from the waveform is measured to reveal the change of gas concentration:Vp?p=kIout(����)=k�Ʀ�,nonI0(��non)+k�Ʀ�,absI0(��abs)exp(?��(��abs)CL)(3)where k is a proportional coefficient.
For a dynamic measurement method, that is, we switch between the methane gas of a certain concentration and pure nitrogen, the difference of the Vp-p is then:��Vp?p=k�Ʀ�,absI0(��abs)(1?exp(?��(��abs)CL))(4)Finally, if noise is included, we have:��V��p?p=��Vp?p+n=k�Ʀ�,absI0(��abs)(1?exp(?��(��abs)CL))+n(5)where ��V��p-p represents the peak-to-peak amplitude from a practical measurement, and n represents the voltage amplitude of the noises from all sources.It can be seen from Equation (5) that, in order to lower the detection limit, or in other words, to enhance the SNR, we need to increase ��Vp-p and to decrease n:To increase ��Vp-p by increasing the path length L is a straightforward way, but L is usually restricted by the full size of a gas detector, so this method can only contribute a small part.
��Vp-p can also be increased by increasing I0(��abs). One way to increase I0(��abs) is to choose an IR source that gives off a stronger light intensity near ��abs, but this usually leads to a higher power consumption of the IR source and is not appropriate for a hand-held device; another way is to make full use of the intensity from the IR source, for example, by gilding the gas cell, by focusing the light beam onto the Cilengitide detection window of the IR detector.Many different methods may be utilized for the reduction of the noise amplitude n. Traditional methods include hardware-based filters such as a Butterworth filter circuit, and software-based digital filters such as an moving average digital filter.
However, these methods are not effective enough in pursuing a ppm level methane detection limit, and they may not be the best fits in the NDIR application. Recently Ye et al. reported that application Ganetespib OSA of least-square fast transverse filtering (LS-FTF) to their NDIR methane sensor has greatly reduced the noise level such that an 8 ppm minimum detection limit has been achieved [12]. Here in this paper, we propose a single frequency filter algorithm based on Fourier transform, and the testing result of our methane sensor with this digital filter suggests that roughly a 1 ppm detection limit has been obtained.2.2.

ARP proteins

ARP proteins. selleck chemicals llc The cataly tic domains of most retrieved sequences were delineated using Pfam. Sequences in Clade 6 have lower similarity to the classical PARPs used to generate the Pfam HMM, so the PARP catalytic domains for these sequences were identified using BLAST searches based on human PARP6 catalytic domain as the query and identifying the region of retrieved sequences that had similarity to this PARP signature. In addition, many sequences whose catalytic domain was incompletely identified by Pfam were completed by BLAST searches using closely related complete PARP catalytic domains from other closely related species, in order to provide as much sequence information as possible for the align ment and phylogeny inference. The identified PARP cat alytic domains were extracted using the extract.

pl tool in the Wildcat Toolbox set of Perl utilities. Sequences of less than 100 amino acids in length and many that were missing important structural elements of the PARP domain were discarded to allow better alignment and phylogenetic signal recovery. Many of these sequences were obtained from shotgun sequencing and are pre sumably incomplete. Phylogenetic analyses The collected PARP catalytic domains were aligned using the MUSCLE3. 8. 31 multiple alignment tool, using default settings. The multiple alignment was sub jected to a maximum likelihood analysis using PhyML3. 0 using the computer facilities at the Ohio Supercomputer Center. The substitution model parameters using for the PhyML analysis were the WAG substitution matrix, 8 I correc tion to model site rate heterogeneity and empirical equi librium frequencies.

These parameters were selected as the optimal substitution model based on analysis by ProtTest v2. 4. A parsimony based starting tree was used. Branch supports were computed in PhyML using an aLRT non parametric Shimodaira Hasegawa like procedure. Once a tree with all PARP domains had been generated, it was used to identify the six clades referred to in the text in combination with examination of domains outside of the PARP catalytic domain. After the six clades were defined, sequences from each clade were aligned separately using MUSCLE. These alignments were used to generate individual clade trees using PhyML with identical parameters. The phylogenetic trees were generated for figures using FigTree software figtree.

Align ment figures were generated using TEXshade and Jalview. Prediction of protein domains After sequences of PARP family members were Drug_discovery retrieved and placed into clades, the sequences were checked for other domains at the Pfam website. Domains iden tified are shown in Figure 4. PfamB 30617 was identi fied in Clade 6A fungal Vandetanib hypothyroidism proteins and extracted aligned as above. This domain was further analyzed using the Protein homology analogy recognition engine and renamed FPE. Subsequently, a consensus FPE sequence was used in BLAST searches to find other proteins containing this region. The UBCc domains from Clade 6A proteins were si

n and might be reinternalized as well On the other hand,

n and might be reinternalized as well. On the other hand, Ruxolitinib side effects proSP CWT, but rarely proSP CI73T, colocalized with syntaxin 2, a SNARE protein involved in the secretion of lung surfactant, found in the plasma membrane and lamellar bodies of AECII. Interestingly, our data propose the influence of hydroxychloroquine and methylprednisolone on localization and routing of Inhibitors,Modulators,Libraries proSP CWT moving it toward early endosomal vesicles. On the other hand, methylprednisolone showed the capacity to partially correct the mislocalization routing defect of proSP CI73T. The expression of mutated proteins frequently results in elevated cell stress. This has been shown for the BRI CHOS domain SP C mutations L188Q and exon4.

We found that the constitutive expression of SP CI73T moderately increased cell lethality under nor mal growth conditions, maybe as a result of the ability of the cellular system to adapt to the pre sence of stress, as reported in. The additional exo genous stress, imposed in our experiments by exposure to pharmaceuticals Inhibitors,Modulators,Libraries used in ILD therapy, might shift this balance out of the tolerable range. Treatment of the cells with azathioprine drug almost doubled the number of dying I73T mutant cells compared to WT. This aggravation was much less pronounced in the presence of methylprednisolone, hydroxychloroquine or cyclophosphamide. Intracellular stress is in part handled by endogenous chaperones. Still without pharmacological boost, such cytoprotective mechanisms may not always be sufficient to normalize the cell function and maintain production of the bioactive surfactant with a normal lipid protein composition.

We determined Inhibitors,Modulators,Libraries the change in expression of the four important chaperones under the influence of the same ILD drugs. We found that the influence of azathioprine on the chaperones was almost the same in proSP CWT and proSP CI73T expressing cells, leaving no protection for additional stress, being a potent stress factor per se. In contrast, hydroxychloro quine treatment led to an 81% increase in HSP90, and 75% increase in calreticulin expression in I73T mutant cells over WT cells, thereby possibly protect ing the cells against the additional stress and enhancing the ER folding capacity. HSP90 Inhibitors,Modulators,Libraries seemed to be targeted by all tested pharmaceuticals, Dacomitinib while calnexin levels were refractory to stimulation.

Treatment with the four drugs did not change the pattern of the proSP C processing bands observed in the immunoblots in Figure 1A. The lipid composition of the stable MLE 12 cells was similar to that previously www.selleckchem.com/products/Romidepsin-FK228.html described in human foetal AECII, especially with regard to PC composition. In the SP CI73T expressing cells we found a pronounced drop of total cellular PC, whereas LPC was increased. It is known that PC is degraded to LPC by an intrinsic phospholipase A2 like activity, and that LPC is toxic to various cells. Increased LPC may therefore be a result of increased phospholipase activity due to the pre sence of mutated SP C. SP C dysfunction may also lead to a d

n further classified into different gene cluster groups and

n further classified into different gene cluster groups and Cisplatin used for analyses of signaling networks. Other measures for data processing, information search and analyses, such as the use of KEGG, depression, anorexia, dyspnoea, reddening of the skin, edema of the eyelids, conjunctivitis, mild diarrhea, shivering, lamping, and unusually high morbidity and mortality. Studies demonstrated that highly virulent porcine reproductive and respiratory syndrome virus was the major causative pathogen of the so called high fever disease. Genetic analysis indicated that the H PRRSVs isolated from China and Vietnam shared a discontinuous deletion of 30 aa in non structural protein 2, as compared with the North American type PRRSV strains.

However, the mechanisms underlying the molecular pathogenesis of the H PRRSV that emerged in China and Vietnam have not been elucidated. Preliminary results indicated that PRRSV modulates the host immune responses and alters host gene expres sion. PRRSV infection up regulated expression of mRNA for interleukin 10, interferon gamma, tumor necrosis factor alpha, myxovirus resistance 1, ubiquitin specific proteases and toll like receptors, and inhibited expression of type I interferons. A study concerning the gen ome wide transcriptional response of primary alveolar macrophages following infection with the Lelys tad PRRSV strain reported that the expression of beta interferon 1 was strongly up regulated while expression of IL 10 and TNF a was up regulated slightly.

A further study concerning the effect of the VR 2332 PRRSV strain on PAM function utilized serial analysis of gene GSK-3 expression and demonstrated that expression of MX1 and USP were significantly up regulated 24 hours post infection. These studies have provided a genome wide gene expression profile of PAMs in vitro following infection with EU PRRSV or NA PRRSV. However, in vitro studies have significant limitations owing to disparities between the in vitro and in vivo environments. Therefore, characterization of host immune responses to PRRSV in vivo is required. PRRSV infection causes widespread apoptosis in pulmonary and lymphoid tissues of infected pigs, but the cause of the increased severity of the symptoms and the unu sually high mortality of pigs infected with H PRRSV remains unknown. High throughput sequencing technology has been adapted for transcriptome analysis.

The technology developed p53/MDM2 interaction by Illumina, also referred to as Digital Gene Expression tag pro filing, allows millions of short RNAs and dif ferentially expressed genes to be identified in a sample without the need for prior annotations. DGE has many advantages including greater sequencing depth, detec tion of unknown transcripts, practical implementation of digital tags, generation of absolute rather than relative gene expression measurements, detection of high levels of differential polyadenylation, detection of low abun dance transcripts and small changes in gene expression, that make it particularly attr