Notes, abstracts, papers, exams and problems of Design and Engineering

Items 1 - 8 of 8

Propagation of sound

Classified in Design and Engineering

Written at October 15, 2019 on English with a size of 19.71 KB.

Can also be including labels of actuators

•– Light

•– Sound

•– Vibrators

•– Solenoids

•– Servos

•– Heat/cool pads

& of Sensors

•– Heartbeat

•– Temperature

•– Skin conductance

•– Pressure and bend sensors

•– Accelerometer

•– Microphone

•– Light sensor

•– Distance

•– Gaze (eye-tracker)

•– Buttons

•– Faders

•Galvanic Skin Response (conductivity)

-offers fast response, but only changes have meaning

•Webcam

-- facial expressions directly convey emotional states, but for mobile applications it would be difficult to mount a camera…

•Speech

-- intonation, rhythm, lexical stress, and other features in speech can be used effectively,

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Production an Operation MNG

Classified in Design and Engineering

Written at October 27, 2020 on English with a size of 8.9 KB.

N-total # of containers

D-planned usage rate of using work center

T-avg waiting time

X-policy variable

C-capacity

N=DT(1+X)/C

D-demand,usually in units x12 to get it

S-ordering cost

H-holding(carrying) cost per unit per yr

P-price

Annual carrying cost=Q/2xH

Annual ordering cost=D/2xS

TC=Q/2xH+D/QxS Present TC=u/2xH+D/uS

Length of order=Q/D

Q=sqr2DS/H

Q/#x100=space needed

Savings=Presents TC-TC at EOQ

Period months or #

Forecast- given

-Output

Regular

Overtime

*subcontract

Output forecast = (Regular + Subcontract+overtime) - Forecast

-Inventory

Beg

End

Avg

*backlog= when the inventory is negative

-cost

Regular

Overtime

*subcon

Inventory=Avgx$

Back orders

Total Costs

Elastic force

Classified in Design and Engineering

Written at October 15, 2019 on English with a size of 973 bytes.

a structure is called statically indetermined if there is at least one load for which the external and internal reactions can be comptuted from the psequilibrium equation but not uniquely.

PS. A satically determined structure obtained from the original one by removing. N constraints and introducing the corresponding force/moments as redundants (Xi, i=1,2,...N)

Flexibility coeff. Aij is the displacement in the line of Xi due to Xgorritoj=1

Stiffness coefficients aij unbalanced force/moment at the ith artificial constraint due to a unit displacement applied at the jth artificial constraint

Load constants ai0 unbalanced force/moment at the ith artificial constraint due to the action of the given loads a0

58

Classified in Design and Engineering

Written at January 31, 2020 on English with a size of 2.18 KB.

c)Comment On the use polymers in construction giving examples of their use and describe The problems presented by the use of polymers in the event of a fire.
Answers 5 c):
Polymers are more common in the Construction industry than ever before and composite materials can offer good Strength to weight ratios as well as good levels of durability. GRP can offer alternative Bridge design options, particularly in remote areas where large section can be Flown in by helicopter and erected in shorter time periods. Other examples Include:
Window frames – UPVC
Rain-water goods – UPVC
Waste systems – UPVC / ABS
Glazing – Acrylics
Cold-water cisterns – Glass reinforced polyester
Cavity insulation – Polystyrene bats
Sealants are specified with a movement

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cm2

Classified in Design and Engineering

Written at January 6, 2021 on English with a size of 5.41 KB.

INTRODUCTION What Is a project (definition, brief description)? A project it is a single, Complex,, unique task, that is limited in costs and time, and has predefined Goals, and assigned sources. It starts from an idea that´s needs to be prepare And plan, be performed to achieved a goal in a fixed cost/time/quality arrangement In a temporary enterprise (high intensity of human and materials resources, Unique aims, unique participants, unique tools).Who are the direct and indirect Involved participants of a construction project? Direct: •Client•Designer (Architect, Structural Engineer, Civil Engineer, Mechanical engineer, Electrical engineer) •Contractor (General Contractor, Subcontractors) Indirect: •Authorities (Public services) •Financing

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Content

Classified in Design and Engineering

Written at August 22, 2020 on English with a size of 4.57 KB.

PRINCIPLE	DESCRIPTION
LAYOUT	The interface should be a series of areas on the screen that are used consistently for different purposes
CONTENT AWARENESS	Users should always be aware of where they are in the system and what information is being displayed
AESHETICS	Interfaces should be functional inviting users through careful use of white space, colours and fonts. There is often a trade off between including enough white space to make the interface look pleasing without losing so much space that important information does not fit on the screen
USER EXPERIENCE	Although ease of use and ease of learning often lead to similar design decisions, there is sometimes a trade-off between the 2, novice users or infrequent users of software will prefer ease of learning,

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Convince someone sth

Classified in Design and Engineering

Written at November 26, 2020 on English with a size of 1.21 KB.

T0 (sth always true) IF+PRESNT. S.+,+PRESENT S.

T1 (real and possible situations) IF+ PRESENT S, +,+ WILL+ B.F.

T2 (unreal or impossible things) IF+PAST S+,+Would/Could/Might+BF

T3 (didn´t happend past) IF+ PAST PERFC,+,+W/C/M+HAVE +PAST PARTIC

Big difference(much/for+comp) small difference(a bit/a little/no+comp) surprise(even + comp)

gradual changes(comp+and+comp - the+comp+sentence+the+comp+sentence) "AS...AS" (Just-almost/nearly-nothing like/nowhere near)

I wonder/I´d like to know/can-could you tell me/would you mind telling me/can I ask you/have you any idea/do you know

Aircraft systems

Classified in Design and Engineering

Written at January 7, 2021 on English with a size of 5.79 KB.

What are the fire protection requirements of construction materials according to Council Directive 89/106/EEC? The Construction works must be designed and built in such a way that in the event Of an outbreak of fire: · the load-bearing capacity of the construction can be Assumed for a specific period of time; · the generation and spread of fire and Smoke within the works are limited; · the spread of fire to neighbouring Construction works is limited; ·occupants can leave the works or be rescued by Other means; ·the safety of rescue teams is taken into consideration. ·The Classification or availability of the structures should be considered based on The fire protection levels, and using data from reaction to fire tests. (MSZ EN 1364 1-

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