Search references for SMD. Phrases containing SMD
See searches and references containing SMD!SMD
Topics referred to by the same term
Look up SMD in Wiktionary, the free dictionary. SMD or smd may refer to: Science Mission Directorate, a body within NASA Sharjah Museums Department, former
SMD
Method for producing electronic circuits
component mounted in this manner is referred to as a surface-mount device (SMD). In industry, this approach has largely replaced through-hole technology
Surface-mount_technology
Surface-mounted device light
between 3528 LEDs and 5050 LEDs – SMD 5050 SMD 3528". www.flexfireleds.com. Retrieved 9 November 2015. SMD-LED-Module-Definition what is a SMD LED Module[1]
SMD_LED
American comedian and actor (born 1993)
2022). Davidson has also released three comedy specials: Pete Davidson: SMD (2016), Pete Davidson: Alive from New York (2020), and Pete Davidson: Turbo
Pete_Davidson
Semiconductor light source
[citation needed] Since then, increased luminous efficacy and higher-power SMDs have allowed them to be used in applications such as high brightness task
Light-emitting_diode
Public school in Srinagar, Kashmir, India
(commonly known as SMD High School and SMD School) is a private K-12, co-educational school located in Srinagar city at Munawar-abad, India. SMD School is named
SMD_High_School
Electric light that produces light using LEDs
LED display List of light sources Lux Photometry (optics) Radiation angle SMD LED Solar lamp Solid-state lighting Spectroscopy "LED revolution: The big
LED_lamp
Flexible strip of surface mounted light-emitting diodes
[citation needed] Since then, increased luminous efficacy and higher-power SMDs have allowed them to be used in applications such as high brightness task
LED_strip_light
1992 video game
AllGame (GG) (GEN) Aktueller Software Markt 8/12 (SMD) 7/12 (SMS) Beep! MegaDrive 21/40 (SGG) 32/40 (SMD) Consoles + 90% (SGG) 88% (SMS) Computer and Video
Ecco_the_Dolphin_(video_game)
1990 video game
Score Electronic Gaming Monthly 4,4,3,6 (SMD) Mega Action 82% (SMD) Videogames & Computer Entertainment 7/10 (SMD) Console XS 70% (SMD) MegaTech 77% (SMD)
James_Pond:_Underwater_Agent
Medication to treat schizophrenia
risperidone (SMD: 0.42; 95% CI: 0.33-0.50), quetiapine (SMD: 0.43; 95% CI: 0.34-0.53), sertindole (SMD: 0.53; 95% CI: 0.38-0.68), chlorpromazine (SMD: 0.55;
Asenapine
Motor disorder
Stereotypic movement disorder (SMD) is a motor disorder with onset in childhood involving restrictive or repetitive, nonfunctional motor behavior (e.g
Stereotypic_movement_disorder
Degree college in Bihar, India
SMD College, Punpun is a degree college in Bihar, India. It is a constituent unit of Patliputra University. The college offers Senior secondary education
SMD_College,_Punpun
Microcontroller board
original on May 17, 2023. "Board; Uno R3 SMD; Docs". Arduino. Archived from the original on May 8, 2023. "Board; Uno R3 SMD; Store". Arduino. "Board; UNO WiFi
Arduino_Uno
Wireless networking standard in development
Roaming Domain (SMD) to address high latency and low reliability cases that are often experienced when devices move between Wi-Fi networks. SMD defines a single
Wi-Fi_8
Average measure of particle size
In fluid dynamics, Sauter mean diameter (SMD) is an average measure of particle size. It was originally developed by German scientist Josef Sauter in
Sauter_mean_diameter
1994 video game
Sega SMD: 91/100 Mega Fun SMD: 63% Next Generation 3DO: 2/5 Total! SNES: 69% Video Games (DE) SMD: 81% 3DO Magazine 3DO: 3/5 Electronic Games SMD: C+ Entertainment
Ballz
Type of transistor in electronic equipment
The BC548 is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. It is notably often the first
BC548
1991 video game
Games PC: 78% SMD: 80/100 Electronic Gaming Monthly NES: 20/40 SMD: 34/50 Joypad 84% Mean Machines Sega 59/100 Mega Fun SGG & SMS: 66% SMD: 67% PC Zone
Fantastic_Dizzy
1994 video game
Video Games 85/100 (SMD) Electronic Gaming Monthly 26/40 (SMD) Eurogamer 7/10 (WII) Game Informer 7.5/10 (SNES) GameFan 277/300 (SMD) IGN 6/10 (WII) Jeuxvideo
Boogerman: A Pick and Flick Adventure
Boogerman:_A_Pick_and_Flick_Adventure
Series of NASA missions to explore the Universe
missions exist within all four divisions of NASA's Science Mission Directorate (SMD): the astrophysics, Earth science, heliophysics and planetary science divisions
NASA large strategic science missions
NASA_large_strategic_science_missions
NASA body supervising its scientific missions
The Science Mission Directorate (SMD) of the National Aeronautics and Space Administration (NASA) is one of the six directorates that constitute NASA
Science_Mission_Directorate
Airport in Fort Wayne, Indiana, U.S.
Smith Field (IATA: SMD, ICAO: KSMD, FAA LID: SMD) is a public airport north of downtown Fort Wayne, in Allen County, Indiana. It is owned and operated
Smith_Field_(Indiana)
1990 video game
Sega SMD & SMS: 88/100 Sinclair User ZX: 94% Your Sinclair ZX: 92% MicroHobby (ES) ZX: 89% MegaTech SMD: 70% Mega SMD: 37% Sega Master Force SMD: 44%
Smash_TV
District of Advisory Neighborhood Commission 7F
Single-member district 7F08 of Advisory Neighborhood Commission 7F in Washington, D.C., has existed since 2023, its electorate consisting entirely of inmates
Advisory Neighborhood Commission district 7F08
Advisory_Neighborhood_Commission_district_7F08
Daily newspaper in Guangzhou city, China
Southern Metropolis Daily (SMD) is a newspaper based in Guangzhou, China, and circulated mainly in the Pearl River Delta region. It is a constituent of
Southern_Metropolis_Daily
American video game developer
Platforms Action 52 Active Enterprises 1993 SMD ACL Pro Cornhole FarSight Studios 2023 PC Art Alive! Sega 1991 SMD Backyard Baseball '09/'10 Atari 2008-9 PS2
FarSight_Studios
Storage Module Device (SMD) is a family of storage devices (hard disk drives) that were first shipped by Control Data Corporation in December 1973 as
Storage_Module_Device
Medical condition
Spondyloepimetaphyseal dysplasia is a genetic condition affecting the bones. Types include: Spondyloepimetaphyseal dysplasia, Strudwick type Spondyloepiphyseal
Spondyloepimetaphyseal dysplasia
Spondyloepimetaphyseal_dysplasia
1993 video game
Sega CD: 5.6/10 SMD: 6/10 SNES: 6.6/10 Game Players SMD: 75% GameFan SNES: 78% GameZone SNES: 85/100 Mean Machines Sega Sega CD: 46/100 SMD: 73/100 Mega
The Lawnmower Man (video game)
The_Lawnmower_Man_(video_game)
1995 video game
5/5 SMD: 3.5/5 SNES: 3.5/5 Computer and Video Games SMD: 92/100 SNES: 4/5 Electronic Gaming Monthly SMD: 6.875/10 SNES: 6.75/10 EP Daily PC: 8/10 SMD: 9/10
Toy_Story_(video_game)
1992 arcade game
AllGame ARC: SNES: SMD: Neo Geo: Electronic Gaming Monthly NEOGEO: 23/40 SMD: 39/50 SNES: 29/40 GameFan 240/300 GamePro NEOGEO: 17/20 SMD: 10/20 SNES: 11
King_of_the_Monsters_2
1995 video game
Nintendo Magazine SNES: 90/100 Total! SNES: 80/100 Video Games (DE) SMD & SNES: 62% Games World SMD & SNES: 69% Sega Magazine SMD: 87/100 Sega Power SMD: 52%
Addams Family Values (video game)
Addams_Family_Values_(video_game)
Board for prototype electronic circuits
breadboards usually cannot accommodate surface-mount technology devices (SMD) or components with grid spacing other than 0.1 inches (2.54 mm). Further
Breadboard
Bantu language of Angola
Benue–Congo Bantoid Bantu (Zone H) Kimbundu (H.20) ? Sama Language codes ISO 639-3 smd (deprecated) Glottolog sama1300 Guthrie code H.22 IETF kmb-AO
Sama_language_(Angola)
Printed circuit board feature
A teardrop is typically drop-shaped feature on a printed circuit board (PCB) and can be found on the junction of vias or contact pads. The main purpose
Teardrop_(electronics)
1992 video game
Gaming Monthly (ARC) 9/10 (SMD) 8/10, 8/10, 8/10, 7/10 (SAT) 15/20 Famitsu (SMD) 33/40 (SMD) 8/10 GameFan (SMD) 270/300 Hyper (SMD) 92% (32X) 82% Next Generation
Virtua_Racing
Computer bus used for data storage systems
include: Many early IBM drives, e.g., IBM 2311, had such an interface. The SMD interface was popular on minicomputers in the 1970s. ST-506 used MFM (Modified
Hard_disk_drive_interface
1987 video game
Review scores Publication Score ACE SMD: 695/1000 TG16: 666/1000 IGN Mobile: 5/10 Joystick SMD: 79% TG16: 72% Mean Machines Sega SCD: 22/100 Player One
After_Burner_II
Type of simple electrical connector
through-hole devices (THD/THT), but surface-mount devices (SMD/SMT) exist too. In the SMD case, the solder side of the pins are bent on a 90-degree angle
Pin_header
Distributor of electronic components
firm headquartered in Richardson, Texas. In January 2022 TTI, Inc. acquired SMD, Inc., a specialty, authorized distributor of electronic and electrical components
TTI,_Inc.
1989 video game
PCE: 24.63/30 RPGFan SNES: 81% Video Games (DE) SMD: 68% SNES: 66% VideoGames & Computer Entertainment SMD: 7/10 TG16: 8/10 Entertainment Weekly SNES: C+
Ys_III:_Wanderers_from_Ys
Capacitor used to prevent energy transfer between two circuits
Capacitor packages: SMD ceramic at top left; SMD tantalum at bottom left; through-hole tantalum at top right; through-hole electrolytic at bottom right
Decoupling_capacitor
1989 video game
Review scores Publication Score AllGame 3/5 (SMD) Console XS 94% (SMD) Megatech 74% (SMD) Raze 80%
Insector_X
Computer and Video Games 2/5 (SMD) Electronic Gaming Monthly 8.625/10 (SAT) Game Players 94% (SAT) GamesMaster 64/100 (SMD) 86/100 (SAT) GameSpot 7.6/10
Worms_(1995_video_game)
1992 video game
75/10 (SMD) Famitsu 22/40 (SMD) Mean Machines Sega 48/100 (SMD) Nintendo Life 9/10 (NS) Push Square 8/10 (PS5) TouchArcade 4/5 (NS) Mega 72% (SMD) Mega
Gley_Lancer
1993 video game
(SMD) Aktueller Software Markt 11/12 10/12 (CD32) Amiga Computing 84% Amiga Format 79% 72% (CD32) Amiga Power 87% Computer and Video Games 88/100 (SMD)
The_Lost_Vikings
American singer (born 1991)
(Young Gully featuring Thuy) 2016 I Don't Wanna Rap No More "Into" (Knucles featuring Thuy) 2019 SMD "Criminal (Over You)" (Afgan, thủy) 2024 Sonder
Thủy
result, a new system emerged, adopting both the single member district (SMD) competition and proportional representation (PR). Under the new system,
1996 Japanese general election
1996_Japanese_general_election
Electronic circuit
control, dual-supply of 0.65V-3.6V translated to 0.65V-3.6V, available only in SMD packages. 4-bit 74AXC4T245 and 8-bit 74AXC8T245 exist too. 74LVC1T45, 1-bit
Level_shifter
System for visual inspection of printed circuit boards by a computerized system
vehicle inspection Vitoriano, Pedro. "3D Solder Joint Reconstruction on SMD based on 2D Images". Academia.edu. Retrieved 4 December 2021. Vitoriano,
Automated_optical_inspection
Bulgarian political party
named VMRO-Union of Macedonian Associations (VMRO-SMD). Despite not being a political party, VMRO‐SMD gained two parliamentary seats in 1994 and 1997 by
VMRO – Bulgarian National Movement
VMRO_–_Bulgarian_National_Movement
Mixed electoral system formerly used in Italy
(SMDs) and a portion are elected from a list. It may be fully defined as a parallel voting system, which excludes a portion (up to 100%) of the SMD winners'
Scorporo
Medication used to treat insomnia
than the effect sizes at 4 weeks for suvorexant (SMD 0.31, 95% CI 0.01 to 0.62) and lemborexant (SMD 0.36, 95% CI 0.08 to 0.63). Benzodiazepines and Z-drugs
Daridorexant
1992 video game
GB: 3.125/5 SGG: 3.25/5 SMD: 4.75/5 GameZone SNES: 90/100 Hyper SMD & SNES: 62% Joypad SMD: 84% Mean Machines Sega SGG: 89/100 SMD: 78/100 Nintendo Power
Spider-Man and the X-Men in Arcade's Revenge
Spider-Man_and_the_X-Men_in_Arcade's_Revenge
2017 studio album by Pink Guy
Blink193" 1:38 20. "Rice Balls" 3:16 21. "Dora the Explora" 2:24 22. "SMD" Holder 1:49 23. "Dog Festival Directions" 2:42 24. "We Fall Again" 1:42
Pink_Season
Electrical component used to link traces
D10/CRCW0402 e3 / TCR Jumper, Imax. = 1.5 A / tolerance ≤ 20 mOhms Mouser. "0 Ohms SMD Resistors / Chip Resistors, Tolerance 1% or 5%". Mouser Electronics. Retrieved
Zero-ohm_link
Statistical measure of the magnitude of a phenomenon
independent groups, SMDs that are statistically significant are almost always in the small to medium range. It is rare for large SMDs to be obtained. Robert
Effect_size
Robotic machine
P&P), are robotic machines which are used to place surface-mount devices (SMDs) onto a printed circuit board (PCB). They are used for high speed, high precision
Pick-and-place_machine
decreto ministeriale di approvazione del programma pluriennale di A/R n. SMD 8/2022, denominato "Cacciamine di nuova generazione (CNG)", relativo all'acquisizione
List of active Italian Navy ships
List_of_active_Italian_Navy_ships
1994 video game
3/20 VideoGames & Computer Entertainment SMD & SNES: 7/10 Electronic Games SMD: A Entertainment Weekly SMD: B+ SNES: A GB Action GB: 85% Games World
The_Lion_King_(video_game)
1994 video game
Review scores Publication Score Beep! MegaDrive (SMD) 6.75/10 Famitsu (SMD) 21/40 Última Generación (SMD) 58/100
Panorama_Cotton
1993 video game
Video Games ARC: 93% SMD: 97% SNES: 96% AMI: 96% 32X: 93% GB: 90% SGG: 88% Electronic Gaming Monthly SNES: 9/10, 8/10, 8/10, 8/10 SMD: 8/10, 7/10, 7/10,
Mortal_Kombat_II
1992 video game
Entertainment SMD & SNES: 7/10 Entertainment Weekly B MegaTech SMD: 82% Mega Play SMD: 7.75/10 Super Control SNES: 78% Sega Force SMD: 96% Sega Power SMD: 89%
Taz-Mania_(video_game)
Computer simulations to discover and understand chemical properties
atomic level. SMD is often used to simulate events such as mechanical unfolding or stretching. There are two typical protocols of SMD: one in which pulling
Molecular_dynamics
US Army general
maint: numeric names: authors list (link) Clemons, Alan (August 10, 2021). "SMD Symposium Focused on Defense in New Era". huntsvillebusinessjournal.com.
James_M._Richardson_(general)
Type of electrolytic capacitor
electrolyte and the cathode contacting layers Construction of a typical SMD tantalum electrolytic chip capacitor with solid electrolyte A typical tantalum
Tantalum_capacitor
1989 run and gun video game
Review scores Publication Score AllGame 3/5 (SMD) Console XS 82% (SMD) MegaTech 65% (SMD)
Crack_Down
Self-propelled anti-aircraft weapon system
2026, video showed Russian Mi-26 helicopter helping to install a Pantsir-SMD-E on top of the Nordstar Tower, to protect Moscow from Ukrainian drone attack
Pantsir_missile_system
1989 video game
Famitsu 21/40 (SMD) Games-X (SMD) Console XS 85/100 (SMD) Game Zone 82/100 (SMD) Mega Drive Advanced Gaming 88% (SMD) MegaTech 79% (SMD) MSX Club (MSX2)
Undeadline
American space and aeronautics agency
Spaceflight (HSMD) Lori Glaze 45% Mission Support (MSMD) John Bailey 14% Research and Technology (RTMD) James Kenyon 9% Science (SMD) Nicola Fox 32%
NASA
Class of psychoactive drugs
benzodiazepines had SMDs of 0.58 to 0.83, sedative antidepressants and antihistamines had SMDs of 0.30 to 0.55, the antipsychotic quetiapine had an SMD of 0.07,
Nonbenzodiazepine
Refinishing operation of an electronic printed circuit board assembly
involving desoldering and re-soldering of surface-mounted electronic components (SMD). Mass processing techniques are not applicable to single device repair or
Rework_(electronics)
Data network protocol
Switched Multi-megabit Data Service (SMDS) was a connectionless service used to connect LANs, MANs and WANs to exchange data, in early 1990s. In Europe
Switched Multi-megabit Data Service
Switched_Multi-megabit_Data_Service
Anti-ballistic missile
to 2027 Association of the United States Army (AUSA) (12 Mar 2020) Army SMD Hot Topic 2020 - VADM Jon Hill - Dir, Missile Defense Agency Jen Judson (23
Ground-Based_Interceptor
Passive electronic component providing electrical resistance
Resistors". p. 3. "Online calculator - EIA-96 SMD resistor". "SMD Resistor Codes: How to Find the Value of SMD Resistors". "Marking Codes used on Welwyn Chip
Resistor
1992 video game
Score Consoles + 75% (SNES) Electronic Gaming Monthly 4/10 (SMD) GamePro 11/20 (NES) 12/20 (SMD) Hyper 51/100 (SNES) Nintendo Power 12/20 (GB) 9.5/20 (NES)
The Adventures of Rocky and Bullwinkle and Friends (video game)
The_Adventures_of_Rocky_and_Bullwinkle_and_Friends_(video_game)
Economic theorem
orange. Furthermore, Alan Kirman and Karl-Josef Koch proved in 1986 that the SMD theorem still holds even if all agents are assumed to have identical preferences
Sonnenschein–Mantel–Debreu theorem
Sonnenschein–Mantel–Debreu_theorem
Property determining comparison and ordering
was first recognized." Number sense Vector notation Set size Heath, Thomas Smd. (1956). The Thirteen Books of Euclid's Elements (2nd ed. [Facsimile. Original
Magnitude_(mathematics)
Chemical compound
marketed orexin receptor antagonists suvorexant (SMD 0.31, 95% CI 0.01 to 0.62) and daridorexant (SMD 0.23, 95% CI –0.01 to 0.48), whereas benzodiazepines
Lemborexant
1992 video game
Review scores Publication Score Consoles + SMD: 55% Computer and Video Games SNES: 90/100 Famitsu SNES: 6/10, 9/10, 6/10, 7/10 GameZone SNES: 80/100 Joystick
The Simpsons: Bart's Nightmare
The_Simpsons:_Bart's_Nightmare
Electronic test equipment that measures inductance, capacitance, and resistance
fixtures (i.e., Kelvin wiring, that is to say, 4-wire connections) to measure SMD components, air-core coils or transformers. Inductance, capacitance, resistance
LCR_meter
1995 video game
Review scores Publication Score Next Generation SNES: 3/5 Super Game Power SMD: 3.2/5
Scooby-Doo_Mystery
American semiconductor manufacturer
continue to serve as Chairman of the Board. Diodes Incorporated in Plano, Texas SMD Schottky diode with Diodes Inc. marking Integrated circuit with Diodes Inc
Diodes_Incorporated
Type of capacitor
electrolyte and the cathode contacting layers Construction of a typical SMD tantalum electrolytic chip capacitor with solid electrolyte Combinations
Electrolytic_capacitor
Line of single-chip microprocessors from Microchip Technology
hardware implementations of PIC devices range from 6-pin SMD, 8-pin DIP chips up to 144-pin SMD chips, with discrete I/O pins, ADC and DAC modules, and
PIC_microcontrollers
Board to support and connect electronic components
components much cheaper. However, prices of semiconductor surface mount devices (SMDs) are determined more by the chip itself than the package, with little price
Printed_circuit_board
1996 video game
(PS) 5/10 (SAT) 9.5/10 (SMD) 6.5/10 (SNES) GameSpot 8.2/10 (PC) 7.1/10 (PS) Hyper 95% (PS & SAT) Mega Fun 79% (PS) 83% (SMD) Next Generation 1/5 (PS)
FIFA_97
1993 video game
Review scores Publication Score AllGame SMD: 4/5 Electronic Gaming Monthly SMD: 42/50 GamePro SNES: 18.5/20 IGN 8/10 Nintendo Life 8/10 Nintendo Power
Zombies_Ate_My_Neighbors
British electronic music producer and DJ
events. In 1993, Nelson set up a new project, the SMD series (Slip Matt's Dubs). The first release, SMD#1, sold over 10,000 copies, with a further three
Slipmatt
Electrical capacitor with an insulating plastic film as the dielectric
technique is also used to produce capacitor "dice" for Surface Mount Device (SMD) packaged components. Metallized film capacitors have "self-healing" properties
Film_capacitor
Indonesian drama romantic television series
Language Indonesian Label Trinity Optima Production Alfa Records Legenda Musik Indonesia Pelangi Records SMD Records Wahana Production Musica Studios
Cinta_Setelah_Cinta
1993 video game
Nintendo Power GB: 13/20 SNES: 15.3/20 Total! SNES: 92% Video Games (DE) SNES: 81% Mega SMD: 93% Pelit 82% Sega Master Force SMD: 91/100 Sega Pro SMD: 93%
Cool_Spot
Musical artist
"MOP" (DJ Drewski featuring Rah Swish and Ron Suno) — Seat at the Table "S.M.D Pt.1" (icyslug featuring Rah Swish and Smoove'L) — Non-album single "War"
Rah_Swish
Capital city of Lanao del Sur, Philippines
Philippine Muslim Teachers' College (Private) Marawi Islamic College (Private) SMD Foundation Academy (Private) Senator Ninoy Aquino College Foundation (Private)
Marawi
Chinese economist
parameter and the power utility parameter are sensible". Comparing with the SMD-estimated external habit model, the three-factor asset pricing model, the
Xiaohong_Chen
Mammalian protein found in Homo sapiens
2OBI Identifiers Aliases GPX4, GPx-4, GSHPx-4, MCSP, PHGPx, snGPx, snPHGPx, SMDS, glutathione peroxidase 4 External IDs OMIM: 138322; MGI: 104767; HomoloGene:
Glutathione_peroxidase_4
Emir of Dutse
development at Bilyak Consulting from 2007 to 2011. He also worked with SMD Consulting from 2011 to 2016 as Head of the Northern Region before he finally
Hameem_Nuhu_Sanusi
Local government bodies in Washington, D.C., United States
areas called Single Member Districts (SMDs), each typically representing about 2,000 residents. Although the SMDs should have equal populations, ANCs may
Advisory Neighborhood Commission
Advisory_Neighborhood_Commission
Partially compensatory electoral system
cast their single vote for a local candidate in a single-member district (SMD) and then all the wasted votes from this lower tier are added to distribute
Vote_linkage
SMD
SMD
SMD
SMD
Boy/Male
Australian, Danish, German, Greek, Hungarian
Victorious; Crowned
Boy/Male
Arabic, Muslim
Good Health
Male
German
Variant spelling of German Gebhard, GEVEHARD means "gift of strength."
Female
English
 English name derived from the vocabulary word charity, from Latin caritas, from carus, CHARITY means "dear." It is one of the virtue names that were popular with the Puritans; some others are Chastity, Faith, Honor, Hope, and Prudence.Â
Girl/Female
German
Famous.
Surname or Lastname
English
English : from Middle English fether ‘feather’, applied as a metonymic occupational name for a trader in feathers and down, a maker of quilts, or possibly a maker of pens. Feathermongers are recorded from the 13th century onwards. In some cases the surname may have arisen from a nickname denoting a very light person or perhaps a person of no account.Americanized form of German Feder.
Boy/Male
Indian
Victorious peace
Boy/Male
Latin Russian
Attendant.
Female
English
English variant spelling of French Chantal, CHANTEL means "stony place."
Boy/Male
Hindu, Indian
Wife of Yayati
SMD
SMD
SMD
SMD
SMD