Time Topic Lead Speaker

Required Attendees

9:00 AM Introductions, Project Background and Summary, Needs and Specifications

Frank All Attendees Encouraged to Attend

9:10 AM Overall Design Concept Presentation Frank All Attendees Encouraged to Attend

9:20 AM Microcontroller, Signal Conditioning, Powered Systems

Rich, Derek All EE/CE invitees, Mark Kempski, Risa Robinson, Ed Hanzlik

9:40 AM DIP Belt Status Mike John Wellin, Risa Robinson, Ed Hanzlik

9:55 AM CReSS Device Benchmarking, Flow Path and Pressure Sensing

Mike, Brian Mark Kempski, John Wellin, Dr. Robinson, Ed Hanzlik

10:10 AM Ergometrics and Case Designs Frank, Mike

Industrial Designers, John Bonzo, Risa Robinson, Ed Hanzlik

10:25 AM BOM, MSD II Risks, Testing Frank, Rich All Attendees Encouraged to Attend

10:40 AM Features Deemed Beyond Scope of Project

Frank, Rich Risa Robinson, Ed Hanzlik

10:50 AM Action Item Review and Consensus Mike Risa Robinson, Ed Hanzlik

Pictures from P08042’s Website, www.skcinc.com, and Original works

Volunteer Smokes a Cigarette through Data Collection Device

Data is Converted into a Digital Smoker Profile

Smoking Machine Smokes a Cigarette per the Volunteer’s

Profile

44mm Filters for Chemical Testing Impactor - Particle Size

Distribution Data Deposition in Lung Cast

Project Deliverables Working Alpha Prototype Ramp up plan for building of 50-500 units Potential/Necessary Improvements for follow-on team

beginning in 092

Key Challenges Ergonomics – Not biasing data Deep Inhalation Puff

Customer Needs SubGroup Priority CReSS device Overall Priority 1 Working Prototype 1 Yes 32 Effectively gathers data

2.1 Measures the deep inhalation puff 1 NO 32.2 Measures flow rate versus time 2 YES 32.3 Maintains accuracy 3 YES 32.4 Logs each cigarette 4 YES 22.5 Logs each puffing event 5 YES 22.6 Needs to store 1 months worth of smoking 6 12.7 Transfers data quicker than 1 minute 7 YES 1

3 Unobtrusive 3.1 Doesn't influence subjects normal smoking behavior 1 NO 33.2 Is easy to use 2 NO 23.3 Is portable 3 YES 33.4 Accepts a wide array of cigarettes 4 YES 0

4 Scale-Up 4.1 Can produce 50-500 devices 1 YES 3

5 Affordability 5.1 Is more affordable than CReSS device 1 N/A 3

6 Safety 6.1 Insures safety 1 YES 3

7 Reliablity 7.1 Is maintainable 1 YES 27.2 Is reusable 2 YES 27.3 Withstands environmental conditions 3 YES 1

METRIC Customer Need Goal Maximum Minimum Units Notes1 Smoking Profile

1.1 Maximum Flow Rate 1,2.2,2.3 ---- 150 94 mL/s Based on CreSS Device/Smoking Topography

1.2 Minimum Flow Rate (sensitivity) 1,2.2,2.3 ---- 94 24 mL/s Based on CreSS Device/Smoking Topography

1.3 Total Puff Time 1,2.4.2.5 ---- 3 0.7 seconds Based on CreSS Device/Smoking Topography

1.4 Time Between Puffs 1,2.4.2.5 ---- 60.3 1 seconds Smoking Topography

1.5 Total Lung Volume 1,2.1,2.3 ---- 6 0.2 L Smoking Topography

1.6 Number Of Puffs Per Cigarette 1,2.4,2.5 ---- 25 5 puffs Smoking Topography

1.7 Number of Cigarettes Smoked 1,2.4,2.5 1800 1800 1200 cigarettes

2 Ergonomics

2.1% of Subjects that hand-held device does not have an effect on their behavior 3.1,3.2,3.3,3.4 100 100 80 %

2.2 Weight of Belt Clip 3.1,3.2,3.3 1 3 0.1 oz Based on CreSS Device

2.3 Maximum Dimensions of Belt-Clip 3.1,3.2,3.3 1 2 0.5 inches Based on CreSS Device

2.4% of Subjects that said the elastic strain band around their chest was comfortable 3.1,3.2,3.3 100 100 80 %

2.5 Diameter of acceptable cigarettes 3.4 0.3937 0.45 0.35 inches Based on CreSS Device

3 Accuracy

3.1 Pressure Sensor Accuracy 1,2.1,2.2,2.3,2.4,2.5 0 1 0 % Error

3.2 Repeatability-Number of Cigs without error over 1 week 2.3 400 400 198 Cigarettes

4 Data Acquistion

4.1 Amount of Data Storage 2.6 8 8 1 Gig(s)

4.2 Transfer Rate 2.7 50 100 12 MB/s

4.3 Sample Rate 2.1,2.2,2.3 1000 100 50 Hz

5 Cost

5.1 Cost of Prototype 5.1 100 500 50 U.S. Dollars Based on CreSS Device

5.2 Cost of Scale-Up 4.1,5.1 40 100 25 U.S. Dollars Based on CreSS Device

6 Safety

6.1 Hand-held device material can withstand Tcig 6.1 700 800 580 Fahrenheit

6.2 Automatic Shutoff 2.3,6.1 YES YES NO Binary

7 Maintenance/Reliability

7.1 Amount of Training Necessary 3.2,6.1,7.1 0.1 0.5 0 Hours

7.2 Moutpiece duration before cleaning is necessary 2.3,3.2,7.1,7.2 30 30 7 Days

7.3 Battery Life 7.1,7.2 30 30 7 Days

7.4 Able to withstand drop 7.1,7.2,7.3 7 10 6 Feet

7.5 Able to operate in wide variety of temperatures 7.1,7.2,7.3 0-120 0-120 32-95 Fahrenheit

Remote Handheld Smoking Unit Case Ergonomics – Frank Air Flow Path and Pressure Sensing

– Brian

Deep Inhalation Puff Sensor Belt Selection and Contacts - Mike

Belt Clip Central Unit Microcontroller – Rich Power System and Signal

Processing - Derek

The Gumstix is a small computer running an embedded Linux operating system.  Many expansion boards are sold to make implementing new features as simple as possible.

Benefits:A

dvanced data processing capabilityP

rogramming in Java or CP

ower managementI

ncludes SD memory expansionS

imple implementation of 802.11 or Bluetooth for data

transferDisadvantages:

Higher power use

Requires microcontroller expansion board for data acquisition

a.Higher cost ($200 vs $60)

Data storage could be on MicroSD or USB

Both cost approximately the same, but MicroSD generally takes up less space

With USB memory, the connector often takes up the most space, and we may need to remove it and rewire in order to fit the USB memory module inside the case

That would negate the advantage of easy data transfer to a PC

The Arduino line of microcontrollers offers many advantages over other types.

Feature-rich prototyping modules, facilitating programming and implementation

Object-Oriented embedded C programming language

Free code libraries for many common functions

True analog inputs with 10-bit digital resolution

  Concepts  A B C

  Arduino Duemilanove  Arduino MEGA

Arduino NanoSelection Criteria

1 Microcontroller ATmega328 ATmega1280 ATmega168

2 Operating Voltage 5 x 5 x 5 x

3 Input Voltage 7-12 x 7-12 x 7-12 x

4 Digital I/O (PWM) 14 (6) x 54 (14) - 14(6) x

5 Analog Inputs 6 x 16 - 8 x

6 Flash Memory 32k x 128k + 16k -

7 EEPROM 1k x 4k + 512 -

8 Clock Speed 16 MHz x 16 MHz x 16 MHz x

9 Cost 29.95 x 64.95 - 62 -

10 Cost >10 units 26.96 x 58.46 - -

11 Cost >100 units 23.96 x 51.96 - -

Sum + 's       2    

Sum 0's            

Sum -'s       3   5

Net Score   0   -1   -5Rank   1  2   3

Continue? Yes No No

Arduino boards are open source Could have customer boards built for our device

with dedicated battery interface, data storage, exterior connections, etc.

A more conservative option, if manufacturing 50 or more units, would be to use an "Arduino Pro" board.  These do not have the pin and connector

system of the type selected, and do not include a power module. 

A Pro board would more easily be soldered in between components and would allow for integration of battery and power circuitry with less duplication.

Concepts  A     B     C     D     E  

 (referenc

e)                  

  Segment  11.1V

1900 mAH    

8 V. 1800m

AH    

12 V. 1800 mAH    

11.1V 2200 mAh    

12V 9800 mAh  

Selection Criteria WeightRatin

g NotesWtd

Rating Notes Wtd

Rating Notes Wtd

Rating Notes Wtd

Rating Notes Wtd

Amount of Voltage (~12V=4, ~9V=3, ~7V=2) 4% 4  

0.16 2  

0.08 4  

0.16 4  

0.16 4  

0.16

Capacity of the battery 35% 31.05 3

1.05 3

1.05 3

1.05 4

1.40

Includes a charger (Yes=4, No=2) 18% 4

0.72 4

0.72 4

0.72 2

0.36 4

0.72

Price 35% 1 $90 0.35 4

SALE $38/

RETAIL $68

1.40 4

SALE $38/

RETAIL $69

1.40 4 $29

1.40 2 $50

0.70

Size / Weight 8% 2  0.16 3  

0.24 3  

0.24 3  

0.24 3  

0.24

 Total Score   2.44     3.49     3.57     3.21     3.22  

  Rank         2     1     4     3  

  Continue?

 

Rejected 

 

Potential Alternate

 

 Selected Idea

 

 Potential Alternate

 

 Potential Alternate

 

Charge / Power Output on same port Will require either external

jumper or design and inclusion of rotary switch

If rotary switch – Will likely also need additional power switch, as battery switch would not be exposed

In Handheld Device to boost signal LM 741 OP AMP Amplification

circuitC

onditioning specifics to be determined once sensor can be tested

May not be necessary depending on sensor choice

Assumptions made: Device will run on 300 mA Assumptions made: Device will run on 400 mA

Cigarettes smoked before batteries need

to be recharged

Cigarettes smoked before batteries need

to be recharged

 

12 V. 1800 mAH

11.1V 1900 mAH

11.1V 2200 mAh

12V 9800 mAh  

12 V. 1800mAH

11.1V 1900 mAH

11.1V 2200 mAh

12V 9800 mAh

Amount of time spent on a cigarette

(minutes)      

Amount of time spent on a cigarette

(minutes)      

3 120 126.67146.6

7 653.3 3 90 95 110 4905 72 76 88 392 5 54 57 66 294

751.42

9 54.28662.85

7 280 738.57

140.71

447.14

3 21010 36 38 44 196 10 27 28.5 33 147

15 24 25.33329.33

3 130.7 15 18 19 22 98

The deep inhalation puff is the breath of “clean” air after taking an initial draw on a cigarette. This “clean” air includes side stream smoke or commonly known as second hand smoke. By capturing the deep inhalation puff, the device will provide more accurate data than the CReSS device on how a human smokes a cigarette during an entire smoking event.

All Breathing Through Mask

Impedance Method Magnetometers

The team has reversed engineered a DIP belt at this point and had enough data to connect it to a microcontroller

Respiratory Inductive Bands

Piezo-Resistance Belts

Using a piezo-electric crystal, it converts chest respiration movement to a small analog voltage that provides a clear, reliable indication of respiration waveforms.

Isolated element provides excellent immunity to environmental artifacts.

Very strong and stable signal.

Sensors individually calibrated for consistent sensitivity.

Sturdy mechanical design

Made of a high-quality, soft and flexible material, these bands provide great comfort to the patient.

Velcro tabs allow the bands to fit a wide range of sizes.

The generous width of each band minimizes the sliding and shifting that occurs during the night.

Washable, steriliziable, and autoclavable

Very light and comfortable

Deep Inhalation SensorsCompanies Qualities Cost Delivery Contact Information Notes

Braebon

High output effort system is a piezo effort-sensing device.

It offers two-dimensional signal generation.

N/A N/A(888)462-4841

Don Bradley, CTO Don.Bradley@Braebon.com

Spoke with customer service department and they directed me to email Don Bradley, CTO. I emailed Mr. Bradley at 10:57 am on October

23, 2009. Still awaiting a response.

Compumedics

Summit IP, battery powered module that features

advanced microprocessor technology. Tracks each breath and automatically updates the calibration

factors to produce balanced SUM channel output.

N/A N/A (877)717-3975

Called and left message at 10:22am on October 23, 2009. Called again and left

another message at 11:17am on October 28, 2009.

Dymedix Corp.

Reusable respiratory effort belts are ultrasonically

welded to give increased durability to the sensor's 1-inch wide material. It is one size fits all. The material will not roll and can be washed.

N/A N/A(888)212-1100

Al Jones, Eng. Tech. Ajones@Dymedix.com

Spoke with customer service department and they directed me to Al Jones, Engineering

Technician. He made a suggestion that older smokers tend to use their shoulders when

they breathe. He asked that I make a formal request to Ajones@dymedix.com. I emailed

Ajones@dymedix.com at 11:01am on October 23, 2009.

Embla

XactTraces Universal Belt is a one-size fits all, reusable effort tracing sensor that

features respiratory inductive plethysmograph technology. Has been engineered to use

with most PSG recording systems. It comes with

standard and specialized connectors for compatability

with Embla and other PSG manufacturers' amplified

systems.

N/A N/A

(888)662-7632 Kirsten Pickard, Marketing

KirstenPickard@embla.com (303)962-1795: Direct Line

Spoke with customer service department and she suggested emailing Kirsten Pickard of the

marketing and product development department. I emailed

Kirsten.Pickard@embla.com at 11:04am on October 23, 2009.

SLP Inc. (Sleep Sense)

More accurate than piezo-resistance sensors because it

measures the entire circumference of your body

when breathing.

2pack $82-98 50: 15% Discount

500: 25% Discount1 week (888)757-7367

Sara Bond

Spoke with the customer service department and they said they would pass my request to

Sara Bond. Sara Bond called back at 1:15pm on October 23, 2009 and asked for my email

address to send me an email regarding their product and the cooperation with me. I replied

with the information that we would like to know. Spoke with Sara Bond again on Tuesday

November 4, 2009 at 11:13am. She suggested I speak with Noam Hasad, CTO about technical

questions; however, she suggested that we use inductive bands instead of piezo-resistance

bands because they are more accurate and less expensive. Emailed Noam Hasad at noam@slp-med.com at 11:43 am on November 4, 2009.

Ambu (Sleepmate)

Piezo-film or crystal respiratory effort sensors

which come available with a full line of belting options:

Velcro tab, buckle and loop. Designed to meet specific needs of the sleep lab and patients. Different design

options provide customized patient comfort and high

senstivity for patients ranging in size from infants to very

large adults.

N/A N/A(800)639-5432

Sanjay Parikh, CTO sap@ambu.com

Spoke with the customer service department and they referred me to Sanjay Parikh, CTO. I

emailed sap@ambu.com at 10:56am on October 23, 2009. He mistakenly emailed his boss his response to my request by saying he didn't

believe they should send us anything because we haven't signed anything. I replied by stating that I would sign anything they wanted in order

to gain any assistance. Still awaiting a response.

Sleep Unity Disorder Center N/A N/A N/A Dr. Robert Israel (585)442-4141 x4674

Spoke with Dr. Israel and he referred me to Tina Wellman from Care Fusion. He said they were

the vendor that they purchased their elastic strain bands from.

Care Fusion Analog Signal N/A N/A

Tina Wellman, Sales Rep. (518)944-0459

Steve Spongen, Respitrait

Spoke with Tina at 1:31pm on October 29, 2009. The only information she could provide for me was that the belt's output was analog signal.

She assured me that she would send me more information on the product but referred me to Steve Spongen of Respitrait for more technical

questions. She said she will have Steve email me. Still awaiting an email from Steve.

Companies Qualities Cost Delivery Contact Information Notes

CReSS Pocket is a self-contained battery operated device that measures ambulatory smoking behavior. With time and date tags assigned at cigarette insertion/removal, a new highly-quantitative view of behavior becomes available.  Onboard memory is used to store all measures for up to four weeks without requiring interaction with study staff. Device does not account for varying densities and temperatures of different cigarettes.

http://www.plowshare.com/products/portable/index.html

Measured Characteristics• Puff Volume [0..150 ml]• Puff Duration [0..20 sec, recorded in ms]• Inter-Puff Interval [0..1200 sec, recorded in ms]• Peak Flow during Puff [0..150 ml/sec]• Time of Peak Flow [0..20 sec, recorded in ms]• Mean Flow during Puff [0..150 ml/sec]• Puffs per Cigarette [0..40 puffs]• Time to First Puff [0..1200 sec, recorded in ms]• Time to Removal [0..1200 sec, recorded in ms]• Date and Time [mm/dd/yyyy hh:mm:ss]

Physical Dimensions• Device Width = 2.54 inches (body)• Device Length = 2.16 inches (body)• Device Height = 1.16 inches (body)• Mouthpiece Length = 2.78 inches• Mouthpiece Protrusion from Body = 0.62 inches• Weight = 3.1 ounces (with battery)• Battery = CR123A 3VDC lithium cell• AC Adapter = 3VDC 1A output (120VAC/240VAC)

http://www.plowshare.com/products/portable/index.html

Has been tested under a variety of conditions using cigarette smoking machine

Participant Cig Index Puff Count

Puff Over Flow

Abandoned Start Date Start Time End Date End Time Time To First Puff

Time To Removal

Temperature

Smoke Machine 10 10 False False 2009/11/03 12:13:20 PM 2009/11/03 12:16:55 PM 38978 131185 25

      Cig Index Puff Index

Volume AvgFlow PeakFlow Duration IPI Time Of Peak          

      10 1 34.17002 24.42439 32.24832 1400 --- 814            

      10 2 32.85443 24.4689 32.52435 1343 3633 774            

      10 3 32.9419 24.48018 32.38667 1347 3715 736            

      10 4 31.69536 24.69864 32.24832 1284 3664 715            

      10 5 32.51331 24.69711 32.10928 1317 3701 646            

      10 6 33.44972 24.50806 32.10928 1365 3647 795            

      10 7 34.84801 24.416 32.38667 1428 3630 759            

      10 8 33.64307 24.63246 32.38667 1366 3597 739            

      10 9 33.26278 24.60778 32.10928 1353 3647 689            

      10 10 32.82542 24.51971 31.96953 1341 3647 690            

Participant Cig Index Puff Count

Puff Over Flow

Abandoned Start Date Start Time End Date End Time Time To First Puff

Time To Removal

Temperature

Smoke Machine 11 9 False False 2009/11/03 12:17:28 PM 2009/11/03 12:26:10 PM 31773 31084 26

      Cig Index Puff Index

Volume AvgFlow PeakFlow Duration IPI Time Of Peak          

      11 1 36.8311 27.02629 35.39878 1363 --- 774            

      11 2 36.63975 26.53127 35.89306 1381 58643 747            

      11 3 36.32334 26.95087 35.27396 1348 58644 730            

      11 4 37.56297 26.61756 35.5231 1412 58623 811            

      11 5 36.51675 27.17569 35.5231 1345 58616 712            

      11 6 37.76537 26.66581 36.13729 1417 58609 760            

      11 7 37.60686 26.68826 35.02278 1410 58608 733            

      11 8 37.94916 26.53174 34.38556 1431 58598 746            

      11 9 40.69093 27.93745 36.6201 1457 37274 798            

Units Parameter Mean MaxmL/s Q 35 60m^3/s Q 0.000035 0.00006m/s V 3.069928 5.262734m D1 0.00381 0.00381C Temp Amb 20 20kg/m^3 density 1.205 1.205kg/(m*s) E-5 dynamic viscosity 1.820755 1.820755(m^2/s) E-6 kinematic viscosity 15.11 15.11C Temp Burn 200 200kg/m^3 density 0.746 0.746kg/(m*s) E-5 dynamic viscosity 25.83398 25.83398(m^2/s) E-6 kinematic viscosity 34.63 34.63- Re Amb 774.0851 1327.003- Re Burn 337.7542 579.0071

Study Data

Units Parameter Mean Max Mean MaxmL/s Flow Rate 35 60 35 60m^3/s Flow Rate 0.000035 0.00006 0.000035 0.00006m D1 0.00381 0.00381 0.00381 0.00381m Dt 0.001905 0.001905 0.00254 0.00254- Beta 0.5 0.5 0.666666667 0.666667- K (table) 0.68 0.68 0.68 0.68Pa delta P 121.6375 357.4652 38.48685874 113.1042in H20 delta P 0.488504 1.435603 0.154565698 0.454234

Cress Design

Chosen vendor – AllSensors Educational and Volume Discounts

Pressure Range – 0 to 1 in H2O

Final selection between 5 candidates requires call to vendor for prices/more info Varying amplification schemes

Will be completed within next week, likely sooner

Currently at model stage Need to give models to focus group to choose a final design

CNC-ready CAD models will follow final design choice Fundamentals of internal structure already understood, will

resemble upper portion of CReSS 2 outer case pieces and plate with pressure taps, plus mouthpiece

Material – Delrin?

Ramp up – Injection Molding

Rough Dimensions – 2.5” x 4” x 1.75”

Awaiting dimensions, screw hole placements from board

Need decision/necessary space for rotary switch if included

CNC from CAD Model – Delrin?

Ramp up – Injection Molding

#

Part Name Owner Qty per device

Price per 1

Price per 500

Material Distributor Distributor Part #

Comments

1Pressure Sensor Brian 1 37.5>30 N/A AllSensors1INCH-D1-BASIC

2Microcontroller Rich 1 30 30N/A Arduino

3MicroSD Card Reader Rich 1 40 40N/A http://www.libelium.com

4MicroSD Card Rich 10 Or More 0 Or More N/A http://newegg.com

5Battery Derek 1 38 38Li-Ion Pine ComputerCam-YSD-12180 Design Problem identified

6Battery Charger Derek 10 (With Battery)

0 (With Battery) N/A Pine Computer

Cam-YSD-12181 Design Problem identified

7DIP Belt Mike 182 for 2 belts

82 for 2 belts N/A SleepSense Still in Discussions with vendors

8Belt Clip Case Left Side Frank 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 500

9Belt Clip Case Right Side Frank 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 500

10Mouthpiece / Flow Path Brian 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 501

11Handheld Main Body Left Frank 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 502

12Handheld Main Body Right Frank 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 503

13Handheld Main Body Orifice Plate Frank 116.88/ftCost of Molding? Delrin? http://www.mcmaster.com/ 8663K23

Will likely CNC prototype, look into actually molding 504

14Handheld Amplification Circuitry - Protoboard Derek 1 0.8N/A N/A http://parts.digikey.com/ V2018-ND Would actually print 500 boards

15Handheld Amplification Circuitry - Resistors Derek 2 0 0.01N/A http://www.newark.com

Can get free from dept. for prototype

16Handheld Amplification Circuitry - Op Amp Derek 2 0 0.1N/A http://www.newark.com 89K1126

Can get free from dept. for prototype

17Shielded Wire Casing w/5 Wires Rich ~4 feet 2.50/ft 2.09/ft N/A http://www.mcmaster.com/ 7673K41

19Tubing Brian ~0.25 ft .20/ft 0.15/ft PVC http://www.mcmaster.com/ 5233K56Waiting on Finished Case Design for Order

20O-Rings Brian 210.00 per 150

10.00 per 151 Buna N http://www.mcmaster.com/ 2418T112

Waiting on Finished Case Design for Order

21Fasteners Frank 6 Steel http://www.mcmaster.com/

22Belt Clip Frank 1 Steel

Poor/ Inadequate Microcontroller Coding

Device significantly influences how user smokes

DIP belt cannot be integrated into system

Late with Final Casing Designs

Production Cost Overrun

Prototype not finished on time

Product lacking durability

DIP sensor cost

Battery Issue

Testing Procedure Test Data Accuracy and Repeatability Run in Cigarette smoking machine using known flow rates per standard

developed to study CReSS (See separate document) Run with CReSS in parallel, as a control/check for performance comparison Compare results from our device, CReSS and known flow rate initially and

after 5, 20, 50 cigarettes to determine repeatability

Testing Unobtrusiveness

Durability

Scale Up

Calibration Pressure sensor initial calibration DIP belt to unique user.

Design Criteria Validation Demonstrate ability to read out from device

Flow Rate vs Time for each puff from each cigarette smoked with device DIP vs Time for each puff from each cigarette smoked with device

Demonstrate device’s ability to store adequate amount of data (1 week’s worth or 1 month’s worth)

Demonstrate device ability to maintain power throughout month-long study, including recommended charging or replacement schedule

Demonstrate ability to maintain device via removable mouthpiece/flow path

Feature Rationale Cigarette Detection (Infrared or other method) Time, Lack of EE Expertise, Deemed Bell/Whistle Wireless Communication Between Device Components

Not necessary, possibly not actually desirable (losing pieces), lack of EE/CE expertise

Wireless Communication for Data Transfer Time, Lack of EE/CE Expertise, Deemed Bell/Whistle Internal Permanent Connection Between Board and Battery

Time, Lack of EE Expertise

E-cigarette Adapter Time, Deemed Bell/Whistle Flow Path Optimization Time, Lack of CFD expertise, will begin this work

Cigarette Vent Hole Issue Very challenging problem, solution is being attempted but is not guaranteed

Onboard Zeroing Sensors Time, Deemed Bell/Whistle, not wholly necessary

Custom DIP Belt Design Time, Lack of Expertise/Understanding in a timely manner, Cost

Embedded Software Upgrades: Power Management, Data Processing, Automated Calibration

Time, Lack of CE Expertise, team will make software functional and as advanced as possible

Battery Life Improvements Lack of EE expertise. Incremental improvement, our design will be adequate but could be improved

Case Design Upgrades for Moldability Time. Necessary for ramp up, will get done if possible

Further Ergonomic Testing and Improvements Time: incremental improvement achieved through additional focus group

Adding Retractable Wire Mechanism to Device Difficulty locating vendor of appropriate pre-fabbed mechanism. Will likely need custom design or custom part from vendor.

Improved Durability Limited time to design case internal structure. Will meet minimum level but cannot guarantee beyond that

All pictures used under educational fair use