Fet g w x. FET Operation Figure 1 will help clarify the working of the field effect transis-tor. Fet g w x

 
FET Operation Figure 1 will help clarify the working of the field effect transis-torFet g w x  As the basic transistors have the junction of the emitter in the mode of forwarding bias this makes the device to operate at low impedance levels

Fetch. Embryo transfer was performed after the morning administration of P, on day 2 of P administration for day 2 embryos, on day 3 for day 3 embryos and on day 5 for blastocysts. Hay- wool and George A. et al. S1) as a means to compare the two. The success of Lutathera™ ([177Lu]Lu-DOTA-TATE) in the NETTER-1 clinical trial as a peptide receptor radionuclide therapy (PRRT) for somatostatin receptor expressing (SSTR) neuroendocrine tumours. R JA Thermal Resistance, Junction−to−Ambient (Note 1) 415 C/W 1. Tellurium as a successor of silicon for extremely scaled. This review provides a detailed evaluation of reported Analyst Recent HOT articlesIn each ring oscillators, the component FET devices have a device scaling of W = 3 μm, L = 3 μm and a gate dielectric thickness of 35 nm. We update our FET to USD price in real-time. Si) and oxides (e. The two branches in the transfer characteristic curve separated by the Dirac point are. PyGetWindow. Hepatic iron concentrations greater than the reference range are associated with hemosiderosis, thalassemia, and sideroblastic. 9 (a. 48. Table 8 provides the cable dimensions, bend radius, face place. A matchstick is pictured for scale. Chemical sensor systems based on 2D and thin film materials. 8582–90. 5 . The live Fetch. 55 ±0. 4) Ensure FET are complete before the due date (every 30 days). 3. Purpose Both perfusion-weighted MR imaging (PWI) and O-(2-18F-fluoroethyl)-L-tyrosine PET (18F–FET) provide grading information in cerebral gliomas. This tool can estimate the G-FET’s voltage / current behaviour keeping the temperature of the G-FET consistently. 20375-5320, U. 5V Operation RF High Power MOS FET Module. 2a. 장효과 트랜지스터 또는 전계효과 트랜지스터(field effect transistor, 약자 FET)는 게이트 전극에 전압을 걸어 채널의 전기장에 의하여 전자 또는 양공이 흐르는 관문(게이트)이. The left (right) QPC, consisting of a pair of split gates L1 and L2. Fet in Clinton Daily Item - ‎Feb 23 1906 Newspaper Name Index, USA and Canada ". So with a FET, we can take a low-level signal at the input and turn it into a high-level signal at the output. A simple, cross-platform module for obtaining GUI information on and controlling application's windows. Here, the authors perform a benchmark study of field-effect transistors (FETs) based on 2D transition metal dichalcogenides, i. , clearing a citation) operated at the weight you have declared. Published on Apr. 1. As compared with the emitter terminal, both the terminals of BJT like base and collector are more positive. KELNER, A. The kinetic profiles of the analogs in the kidney, which also expresses SSTR-2, were different from those in tumors, showing the highest uptake for. Figure 10a plots distribution of I on (measured at a V g − V t = −1 V) for aligned array-SWCNT FETs having <N> ~ 11 SWCNTs, where <N> = <ρ>W is nominal number of SWCNT within the FET, W is the channel width, and <ρ> is the average SWCNT density on the substrate per µm across the length of the nanotubes. To evaluate the mobility of few-layer graphene sheets (FLGS), a graphene-based high-k ferroelectric field-effect transistor (GFE-FET) has been fabricated using a sol-gel spin coating method, where FLGS and high-k ferroelectric material like barium zirconium titanate/barium calcium titanate (BZT/BCT) act as a channel layer and gate insulating. , Xia, F. A Field Effect Transistor (FET) is a three-terminal Active semiconductor device, where the output current is controlled by an electric field generated by the input voltage. The application of a voltage to the gate, which modifies the conductivity between the drain and source, controls the flow of current in FETs. Share your ideas and get valuable insights from the community of like minded traders and investors. DIETRICH, G. (Received. The concept of the field effect semiconductor is based on the idea that a charge on a close-by. Fet G Yount from Shelby, NC. High-frequency low-noise GaAs FETs are used in phase-array radars, signal processors, space based electronic detection systems, tracking devices, and digital transmitter-receivers. The. Thus, an A/D converter produces a digital number proportional to the ratio of an analog signal to a reference voltage; and a D/A converter produces an output that is a. O-(2-[(18)F]fluoroethyl)-L-tyrosine (FET) is labeled with (18)F (half-life, 120 minutes) and could be used much more broadly. Nonvolatile memory of 2D InSe MOfeS-FETs. En los extremos del canal se hacen sendas conexiones óhmicas llamadas. The PBASE modified dried CNT-FET devices were characterized by XPS measurements and compared with bare CNT-FET surface. Recently, our group demonstrated the first perovskite FET with balanced room temperature ambipolar transport by using a triple cation perovskite of the chemical structure Cs x (MA 0. Track Fetch. We demonstrate room-temperature ferroelectric field-effect transistors (Fe-FETs) with MoS 2 and CuInP 2 S 6 two-dimensional (2D) van der Waals heterostructure. Van de Put, M. The sensor is. V DS ) obtained for the devices operating in the. 5-nm. 2. The changes in FET characteristic of G-MoS 2 FET before and after hydrogenation. Best overall BDSM dating site – Adult Friend Finder. L. 31% in the past 7 days. A. For this type of sensor, antibodies are immobilized on the gate insulator, as shown in Fig. e. channel exhibited a high ratio of over 10 ×. Results from this. A high value of 10 7 hour mean-time-to-failure (MTTF) was reported for GaN device operated at 150 °C, while the lifetime of a GaN device will be reduced by over two times by elevating the device. Top gate leakage current less than 0. 49 USD / 19,99 EUR / 17. In each ring oscillators, the component FET devices have a device scaling of W = 3 μm, L = 3 μm and a gate dielectric thickness of 35 nm. These innovations span enablement of multiple threshold voltages and bottom dielectric isolation in addition to impact of channel geometry on the overall device performance. to what was measured in a planar FET with the same gate oxide physical thickness (Figure 17). The sensing device comprises GFET connected with a. As the basic transistors have the junction of the emitter in the mode of forwarding bias this makes the device to operate at low impedance levels. Experiments with SERS corroborated target-specific recognition in close proximity to substrates for S1P and glucose aptamers (fig. 5. FETs are three-terminal devices with a source, gate, and drain. The selectivity test was performed by using target SARS-CoV-2 S1 and non-target SARS-CoV-1 S1 and MERS. A low source-drain voltage of 0. It has an insulated gate, the voltage of which determines the conductivity of the device. 5 mV. FET uses embryos (fertilized eggs) that have been frozen. 2 Ga 0. For the JFET in Fig. gm = 2ID W L µnCox gmb = γ 2 −2φp −VBS gm Circuit Parameters Device* |Avo|Rin Rout Parameters gm gm +gmb ∝ 1 gm +gmb ISUP ↑ --↓ W ↑ --↓ µnCox ↑ --↓ L ↑ --↑ * VBIAS is adjusted so that none of the other parameters change Common Drain amplifier is often used as a voltage buffer to drive small output loads (in multistageElectronic Devices and Circuits Questions and Answers – The FET Small-Signal Model. A G-FET with a naturally-oxidized Al 2 O 3 top-gate dielectric film [24] was also fabricated as an alternative. Cisco FET-40G QSFP Modules are fabric-extender transceiver modules used to connect to fabric links (links between the fabric extender switch and the parent switch). The channel conductance is probed by measuring the drain current at V G = 0 V and a low drain biasAbstract. 场效应管 (英語: field-effect transistor ,缩写: FET )是一种通过电场效应控制电流的电子元件。. 00mm x 1. 4. The app is free to download and use. Here, we follow FET convention and measure all potentials relative to a grounded source contact. The field-effect transistor is a type of transistor that uses an electric field to control the flow of current in a semiconductor. The diagnostic accuracy of 18 F-FET PET parameters was evaluated by receiver-operating-characteristic analysis and χ 2 testing. As the thickness of the ferroelectric layer increases, the coercive voltage (V C) increases and C FE decreases, and then this tendency results in the improved. Currently only the Windows platform is implemented. Gate delays of 0. Field-effect transistor-based solution-processed colloidal quantum dot photodetector with broad bandwidth into near-infrared region. In a typical device (Figure 3B), the conductance responds weakly to Vg before modification. 5-nm. Abstract. b, Transfer characteristics in a. Negative capacitance (NC) field-effect transistor (NC-FET) has been proposed as one of the promising candidates beyond complementary metal-oxide-semiconductor. 350 7. In a ML MoS 2 FET, the vicinity of metallic contacts gives smaller bandgap than that of the gate dielectric, and there should be valence and conduction band offsets between the regions. It comes in two types: junction-gate FET (JFET) and metal-oxide-semiconductor FET (MOSFET). molecular FET in Fig. Canonical dynamics: equilibrium phase-space. The case is some sort of steel. The high and low conductance states are programmed upon sweeping the gate to V G = −50 V and V G = +50 V, respectively. ADS View Current Number . KRUPPA, H. unlike in a standard FET where the insulator capacitance is a simple linear dielectric governed by a parabolic energy equation (i. Textile platform with functional fibrous devices could offer an opportunity to realize previously unidentified types of electronic systems with a freedom of form factor (1, 3, 15), unlimited scalability (2, 16, 17), and high upgradability (18, 19) after systemization. UET-090 G UET-150 G . Coronavirus disease 2019 (COVID-19) is a newly emerging human infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, previously called 2019-nCoV). 05 Ga 0. Therefore, the JL FET exhibits high immunity to SCE and surface scattering at the interface. This did not work as well as I hoped. A. BuzzFeed has breaking news, vital journalism, quizzes, videos, celeb news, Tasty food videos, recipes, DIY hacks, and all the trending buzz you’ll want to share with your friends. 2a. If IDSS = 10 mA and VGS (off) = – 6 V, find the value of (i) VGS and (ii) VP. Each has its own content, rules, and moderators. The band. C. Example) V S = 4 V, V G = 2 V, V D = 1 V V T = -0. This paper presents graphene field-effect transistor (GFET) based pressure sensors for tactile sensing. Here, we report a high-performance SnSe FET based on a van der Waals (vdWs) heterostructure of SnSe encapsulated in hexagonal boron nitride ( h BN) together with graphene contacts. Composite MoS 2 /carbon nanotube material has been produced by hydrothermal decomposition of a mixture of multiwall carbon nanotubes (CNTs) and a water solution of ammonium molybdate and thiourea. For example, if you have a measurement of 5 feet, you would multiply 5 by 30. 76. Reddit consists of many communities, each centered around its own niche. The as-produced BP biosensor showed both high sensitivity (lower limit of detection ~10 ng/ml) and selectivity towards human immunoglobulin G. 85 ±0. 2 Material approaches for high quality ferroelectricity in the relatively thick HfZrO (a) polarization–voltage curves of TiN – 1: 1 HfZrO–TiN capacitor with 10, 20 and 30 nm thick ferroelectric layers. Haitian Creole. M1 1 2 3 3 DMOS L=1U W=1U. A FET is a transistor which uses the field effect to control current flow. W. $1559. The multi-level microstructure of conjugated polymers is the most critical parameter determining the charge transport property in field-effect transistors (FETs). 7) Supervises PLT Environmental Safety Program. Figure 4g shows the characteristics of a typical oscillator. 17a). This page introduces the product lineup of GaN, GaAs high-frequency devices and Silicon RF devices. HG-MoS 2 FET showed a change in current of over 10 3 on/off ratio. This result indicates that PNA probe can significantly improved the specificity of the G-FET sensor. The single-event transient (SET) is studied to determine the sensitive location of the device. and X. The ferroelectric CuInP 2 S 6 is a 2D ferroelectric insulator, integrated on top of MoS 2 channel providing a 2D/2D semiconductor/insulator interface without dangling bonds. Field effect transistor (FET)-based biosensors have two major components, which are biological elements and electronic mediated FET sensing. 32. (1), we get, W(x) = a b(x) = s 2 qND (V0 V(x)) (3) where a b(x) is the penetration of depletion region W(x) into the channel at a point x along the channel (Fig. The band. also write that weight in the box, and enter the date each vehicle will FIRST or WAS FIRST (e. g . Its. 1 cart items. 43ps for p-FET, respectively, were achieved for theThe scaling characteristics of MoS 2 and Si transistors as a function of channel thickness and gate length are summarized in Fig. (24. Figure 5 shows the performance fig-Piezoelectric-based flexible sensing sets on FETs. , H. To investigate the electrical characteristics of the BP FET device, at first, we performed an I-V measurement on the device. 7 ±0. B. Two. PT =g m r op , β=R 2 /(R 1 +R 2 ), and (R 1 +R 2) >>R L Thus V o can be expressed as: (1 ) (1 PT EA) REF PT EA PT EA in PT o A A V A A A A V A V. It has a circulating supply of 811,878,948. S. 99 ref m l f m l f m l f variable configuration zone r n p. How the list of NSFW subreddits was created. 1029, provides instructions for establishing an exemption from the section 4371 excise tax on insurance premiums paid to a foreign insurer or reinsurer when the exemption is based on the provisions of an income tax treaty to which the United States is a party. 4c, where W and L denote the width and length of. 85 inch x 0. designed and performed the modelling studies. 2% to all types of analyte at 5 × 10 −16 M in both buffer and full serum (Fig. 7–4. J. The µ app values in two-probe FET configurations are strongly dependent on V g , which might suggest a possible overestimation of µ app. Currently only the Windows platform is implemented. , and X. Definition: FET is an acronym used for “ field effect transistor ”. 5 V, where the resistance of the sample started to drop. Hepatic iron concentrations above 3000 mcg/g are seen when there is iron overload without cellular injury and cirrhosis. The path for current is from Source to Drain through the semiconduc-tor material, this path being termed the channel. values against the drain voltage for a selection of V. w⋅w+wx+xw+x⋅x w ⋅ w + w x + x w + x ⋅ x. All groups and messagesCatalog Datasheet MFG & Type PDF Document Tags; 2012 - FET FH1G. DS. Optoelectronic properties of graphene are exploited…Extended-gate field-effect transistor (EGFET) is an electronic interface originally developed as a substitute for an ion-sensitive field-effect transistor (ISFET). w2 + 2wx+x2 w 2 + 2 w x + x 2. The short half-life of (11)C (20 minutes) limits the use of MET-PET to institutions with onsite cyclotron. In FET biosensors, or bioFETs, the interaction with biological analytes is transduced as a change in the electrical conductance of the sensor. ADDITIONAL DOCUMENTS . The Depletion-mode MOSFET, which is less common than the enhancement mode types is normally switched “ON” (conducting) without the application of a gate bias voltage. The continuously swept gate voltage with a scan rate of 2 mV s − 1 was applied at 260 K. (not the best thermal conductor. W. The Ge atoms (represented by the black spheres) form a buckled germanene layer, and the unit cell of the germanene is marked by red spheres (A sites) and green spheres (B sites). 581 FET. 40GBASE-SR-, duplex MMF. If the drain current is zero then. 2g), which is caused by the influence of graphene’s unique energy band structure (energy bandgap E g = 0 eV) (Current 2010). A field-effect transistor (FET) based on ultrathin Ti3C2–MXene micropatterns is developed and utilized as a highly sensitive biosensor. Gate Delay and CMOS Inverter Figure 18 shows the intrinsic gate delay (CV/I) of the fabricated CMOS FinFETs as compared with that of the published planar devices. c) Rise and fall current response of the PTNWs/G F-FET. The XPS machine is attached to a monochromatic AlKα X-ray. For a gate bias of V GS < ~6. 00 FABRICATION AND CHARACTERIZATION OF GaN FETs S. Postdoctoral Fellow for the ID06-LVP beamline. Nanoscale field-effect transistors (FETs) represent a unique platform for real time, label-free transduction of biochemical signals with unprecedented sensitivity and spatiotemporal resolution, yet their translation toward practical biomedical applications remains challenging. W. B 85, 033305. As an atomic-thick layer material, graphene has a large specific surface area, high electron mobility, and high sensitivity to electronic perturbations from. 1986-01-01. Finally, an analysis of future. 2-GHz television receive-only (TVRO) band and for the 12-GHz direct. (H x W x D) 13. Solid and dashed open magenta squares indicate two nanowire FET devices located on different planes along the x axis. edu. W. If the drain current is zero then. 9313 . For the PNA probe-modified G-FET sensor, Δ V cnp complementary is about 0. 1. g. The gate charges Q G and R DS,on are the two parameters needed to optimize the GaN. 앞선 포스팅에서 알아본 BJT와 같이 FET 또한 크게 두 가지 종류가. The flow of current. 9 b), thus the specificity of the PNA probe-modified G-FET sensor is calculated about 14. 99 GBP for 12 months (Prices may vary slightly depending on location and currency). and H. Hoover, W. ˘ ˆ ˘ - ! ˘ % ˘ ˆ 3 4 ˘ ˘ " ˆ ˘ ˘ ! ˆ "˘ ˆ + 2 0 0 2 ˚ . G. (a) WSe 2 Bio-FET with GO x bioreceptor. It is a three terminal unipolar device in which conduction is manipulated with the help of applied electric field. The text is intended for use in a first or second year course on semiconductors at the Associate or. Fabric Extender, 4 lanes, 850 nm MMF. Field-effect transistor (FET) biosensors based on low-dimensional materials are capable of highly sensitive and specific label-free detection of various analytes. 3) Explicación de sus elementos o terminales. Absolute Maximum Ratings. , J. Among them, field-effect mobility μ FET is usually derived from the equation as follows: (1) μ FET = L g m,max W C i V DS where g m,max and C i are the maximum transconductance and the gate capacitance per unit area, respectively [50]. FET to USD Chart. 498719 today, which is a 0. In just the past hour, the price shrunk by 1. FH1-G FH1-PCB Description High Dynamic Range FET , FH1 High Dynamic Range FET Product Features 50 ­ 4000 MHz Low Noise Figure 18 dB Gain +42 dBm , > 100 years · · · · · · · Product. b) Ratio of change in drain. g d s. Overview. 38 GW/cm 2 and 0. $1559. The E g of (In x Ga 1-x) 2 O 3 and In compositions were negatively correlated, and E g could be tuned within the range of 4. Microwave performance characteristics such as intermodulation, AM to PM conversion and noise figure will be presented. W. Here, we follow FET convention and measure all potentials relative to a grounded source contact. IL gating of the WO 3-based FET was first attempted in a glovebox filled with argon gas. 1uF BST 3. Li, J. Q4. , Zhang, W. 5V, ID I D = 5. What does the abbreviation FET stand for? Meaning: Federal excise tax. . Its “input” signal (voltage between gate and source) modulates a proportionate “output” signal (voltage between drain and source). ~ Pergamon Solid-State Electronics Vol. Nanosheet (NS) and nanowire (NW) FET architectures scaled to a gate length (LG) of 16 nm and below are benchmarked against equivalent FinFETs. Voltages applied to the source, gate and drain electrodes of the devices are denoted as V S, V G and V D, respectively. 8 GHz, and with a ±1. FET also offers an optional subscription package. 005 V (Fig. [Grip Upgrade] Hotline Games 2. This product family outperforms silicon counterparts in terms of the R DS (on. , MoS 2) are of considerable interest for atomically thin transistors but generally limited by insufficient carrier mobility or driving current. ai Price Live Data. Lewis X has a much lower affinity for the mutant M249C CRD; ITC measurements with Lewis X performed under the same conditions as the lactose. QSFP-40G-CSR4. However, ON current level also. , noise. Provided to YouTube by avex traxW-G-X ~W Goes Next~ (『風都探偵』挿入歌) · Aya Kamiki w TAKUYAW-G-X ~W Goes Next~(『風都探偵』挿入歌)℗ AVEX ENTERTAINMENT INC. When the drain of the p-channel JL FET is biased at a large negative voltage, and gate as well as source are connected to ground, this bias forces a full depletion in the channel near the drain, which changes the energy difference between the. 金屬氧化物半導體場效電晶體依照其通道極性的不同,可分為电子占多数的N通道型與 空穴 占多数的P通道型,通常被稱為N型金氧半場效電晶體(NMOSFET)與P型金氧半場效電晶體(PMOSFET)。. A low source-drain voltage of 0. Lupina, G. . (c) Transfer curves of the device under varying bidirectional V gs sweeps. Figure 1: All-electric all-semiconductor spin FET. Taken from the Shell Spirax Product Family Brochure. 8 GHz, GaN Power Amplifier X + HMC8500LP5DE The HMC8500LP5DE is a gallium nitride (GaN), broadband power amplifier delivering >10 W with up to 55% power added efficiency (PAE) across an instantaneous bandwidth of 0. A schematic diagram of the Si-NW Bio-FET, which contains a Si-NW FET device and a PDMS microfluidic layer, is shown in Fig. A. With its body and source connected to V dd, the PFET shown in (d) responds to V g in exactly the opposite manner. X. Methods: Ninety-nine patients with previous cancellations of embryo transfer were included, 56 of whom were prospectively treated with intrauterine. Herein, we demonstrate the potential to overcome. G-FETs are particularly attractive as next generation bioelectronics due to their mass-scalability and low cost of the technology. Using 2000MHz * km MMF (OM3), up to 300m link lengths are possible. The device design issues are described followed by a section on. With the PowerGaN G-HEMT 650V, ST is expanding its STPOWER power transistor family with the addition of e-mode HEMTs (intrinsically normally-off devices) rated at 650V in top-, bottom-, and dual-side cooled SMD packages for high-power and high-frequency applications. (1), we get, W(x) = a b(x) = s 2 qND (V0 V(x)) (3) where a b(x) is the penetration of depletion region W(x) into the channel at a point x along the channel (Fig. What is trans-conductance? a) Ratio of change in drain current to change in collector current. [Grip Upgrade] Hotline Games 2. Some Ge atoms in the germanene sheet with N. GS. Residual metallic contamination of transferred chemical vapor deposited graphene. Join the Conversation! Build your trading network; Follow your favorite assets. G f2 is the Gibbs free energy of the ferroelectric dielectric, and (x, y) is the Landau coefficient of G f2. 76. B. The FET 07x preamplifier that was sent to me for review came in a black finish with gold accents on the front button controls. 1 Introduction. 场效应晶体管有时被称为「单极性 晶体管 」,以它的单载流子. The uptake of (18)F-FET-βAG-TOCA was specific: a radiolabeled scrambled peptide, (18)F-FET-βAG-[W-c-(CTFTYC)K], did not show tumor uptake; there was lower uptake of (18)F-FET-βAG-TOCA in AR42J xenografts when mice were pretreated with 10 mg of unlabeled octreotide per kilogram; and there was low uptake of (18)F-FET-βAG-TOCA in low sstr-2. 5), the alloy will be mixed with monoclinic and bixbyite phases [87] . 280 0. The Cisco SFP-10G-SR-X is a multirate * 10GBASE-SR, 10GBASE-SW and OTU2/OTU2e module for extended operating temperature range. 3. 66 μFcm-2 (thickness of 20 nm with an effective k value of 15, taking into account the contributions from the interfacial dielectric layer) would result in a voltage effect of ∼15 V. 6 ˇ˘Whatever your kink or your fetish, we support and encourage our kinky community to share and learn from each other. KRUPPA, H. 23) 1. 2. FET-based molecular sensors can be used in as numerous of applications including an abundant number of biosensing applications (BioFETs). When a target molecule binds to the receptor on the graphene surface, the redistribution of electronic charge generates a change in the electric field across the FET channel region, which changes the electronic conductivity in the channel and the overall device response (Figures 2,3). 5 . If your manufacturer can't give you the information and you really need it, move on to another manufacturer. (f) The evolution of resistance with time in SIC-FET with V g = 4. Cisco QSFP connector mod ule typically weigh 100 grams or less. edu. Federal Excise Tax Exemption Program. The symbol for the eGaN FET is sim - and combined with a very low capacitance struc - ilar to the enhancement mode MOSFET displayed ture , the delay times and switching speeds are sig - in gure 2 . . Tilting frying pans FET-060 G FET-080 G FET-100 G . I D-V G curves of the NW G out device, of the NW G in device, of the planar G out de vice, and of the planar G in device with L G =0. The MolEMS g-FET shows an overall ΔI ds /I ds,0 exceeding 1. Background. 83) 1− x Pb(Br 0. As far as I know, since BJTs are current controled devices, its transconductance (gm) differ from the FETs. This result indicates that PNA probe can significantly improved the specificity of the G-FET sensor. Hysteresis properties of the 2D InSe MOfeS-FET. molecular FET in Fig. Operating instructions FET-G . Ph. S8, E and F). Installation instructions BOT/FET/UET-G . 08 pA/ μ m 2 at 4 MV/cm has been obtained, which is the smallest compared with the reported top-gated MoS 2.