Resonance Experiements

At first I was hoping I wouldn’t need a resonator to increase the volume of the vibrating strings. Unfortunately, the strings are barely audible on their own.

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I next tried putting some found objects on the end of the string. This was still barely audible.

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I then decided I really needed to study instrument acoustics a bit. In a instrument like a guitar, it seems that the main thing that vibrates is the bridge. This is a piece that the strings go across just before attaching to the guitar:

The bridge then vibrates the front side of the guitar. This pushes the air molecules inside the guitar that then bounce off the back side of the guitar.

I decided to try a small version of this. This was louder, and audible, but still not loud enough.

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I’m working on a much larger version now, that more closely matches the project sketch. I’m constructing it so I can try different materials out for siding on the same frame. I will also be trying different sized bridges as well.

 

 

Healthcare Interview – Paul Sherwood, former Hospital Administrator

After researching, collecting, analyzing, and telling stories with large sets of healthcare data, I decided I wanted to move towards a more personal based exploration of the healthcare system. I was also inspired by this NY Times interactive story telling piece.

I’ve been interviewing people who work in the industry in various capacities and asking them to tell me stories. Paul Sherwood spent several decades running hospitals, and being my Dad, was an easy person to get in touch with. Here are some stories he told.

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Story 1 The Emergency!

One of the funnier incidents…

Received a call from the Engineering Department – also called Maintenance.  These guys basically fixed anything that broke in the hospital – in the plant…so not medical equipment but the building and any of the building services.  They’d also do minor mods to the building.

Anyway, had a call from the Chief Engineer who asked to see me…said it was an emergency. “Come on” of course!

Upon arrival he presents me with a standard work request he’d just received from the Emergency Department. The nurses needed one of the guys to come to the ER with a pair of plyers to pull down a patients trouser zipper in which he’d caught his penis!!

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Story 2 The Operating Room

The hospital industry supports an organization called The Joint Commission on Healthcare Accreditation” colloquially known as the “JCAHO”. The JCAHO would visit each fully accredited hospital every three years and conduct a 3-5 day scrutiny of everything the hospital did from its personnel policies to its quality assurance surveillance over medical matters to financial management to administrative leadership systems to management of the medical staff’s credentials to practice. If you failed to received full accreditation but only received contingent or partial accreditation the surveyors might return in 12 or 18 months for an interim survey.

A survey is an immense project and preparation normally takes a full year. Only after several cycles can a hospital hope to engender a culture that conducted all day-to-day operations as though every day was a day when the surveyors would be in the department.

Part of the year-long preparation involved training the various patient care teams in what the surveyors would be looking for in individuals’ knowledge bases during the team interview. One cycle I was leading a training session for the surgical staff. One of the JCAHO standards requires that every patient being anesthetized be asked, prior to anesthesia, if he’d used any recreational drugs in the week preceding surgery. The concern is that use of recreational drugs can potentiate or modify the reaction of the anesthetic in the body. After the review session was completed we were sitting around talking and I happened to ask the anesthesiology staff what percentage of patients answered in the affirmative. Their answer, with no hesitation, was “easily 75%”  I was floored!!

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Story 3 The Patient

Patients are why all of us are in the business. We want to help. Each individual on the hospital team makes his or her own contribution to the effort. But some patients require greater effort than others.

One day a nurse showed up at my office asking help with a patient. It seemed her staff had been dealing with this man for quite some time and had come to the end of their patience. I agreed to go see him but he had followed her down to my office (in his wheelchair) and showed himself right in and started yelling with no preamble.

I let him go on as long as he wanted. When he finally started to wind down I began a conversation with him over his expectations and our failures thereto. (What I understood immediately was that this patient was afraid of his pending death). We talked for about the problems for over an hour after which I promised to see what I could do but promised nothing specific.

The next day I went to the nurse who had sought my help and told her what I thought and what I intended. After that, each day, I went to his bedside to see how things were going. Would you believe that absolutely nothing else wrong ever happened??? After several days of calm, one morning, I found he had died during the night. I attended his funeral with his widowed wife with whom I’d become friends along the way.

Patient as performance

As part of my research into health care I went to go see the doctor myself.

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Here are the results from my bloodwork:

968T - LIPID PANEL

Test Name Result Flag(s) Reference Range Reported Date Footnote
NON HDL CHOLESTEROL 106 mg/dL 10/22/2013 5:47 AM TBR

Target for non-HDL cholesterol is 30 mg/dL higher than
LDL cholesterol target.
CHOLESTEROL 143 125-200 mg/dL 10/22/2013 5:47 AM TBR
HDL 37 L >=40 mg/dL 10/22/2013 5:47 AM TBR
CHOL/HDL RATIO 3.9 < = 5.0 10/22/2013 5:47 AM TBR LDL 71 <130 mg/dL 10/22/2013 5:47 AM TBR Desirable range <100 mg/dL for patients with CHD or diabetes and <70 mg/dL for diabetic patients with known heart disease. TRIGLYCERIDES 176 H <150 mg/dL 10/22/2013 5:47 AM TBR TBR Test Performed By *Quest Diagnostics, Teterboro (One Malcolm Avenue, Teterboro, NJ, 07608, 8006311390, William E. Tarr, M.D.) *** END OF FINAL LAB REPORT *** P5933 - COMP METAB/TSH/CBD Test Name Result Flag(s) Reference Range Reported Date Footnote TSH 1.48 0.40-4.50 mIU/L 10/22/2013 8:27 AM TBR BILIRUBIN, TOTAL 0.5 0.2-1.2 mg/dL 10/22/2013 3:51 AM TBR GLUCOSE 93 65-139 mg/dL 10/22/2013 3:51 AM TBR The glucose reference range is based on a non-fasting state. UREA NITROGEN 13 7-25 mg/dL 10/22/2013 3:51 AM TBR CREATININE 1.10 0.60-1.35 mg/dL 10/22/2013 3:51 AM TBR BUN/CREATININE RATIO NOTE 6-22 10/22/2013 3:51 AM TBR Bun/Creatinine ratio is not reported when the Bun and Creatinine values are within normal limits. SODIUM 140 135-146 mmol/L 10/22/2013 3:51 AM TBR POTASSIUM 4.7 3.5-5.3 mmol/L 10/22/2013 3:51 AM TBR CHLORIDE 103 98-110 mmol/L 10/22/2013 3:51 AM TBR CARBON DIOXIDE 28 19-30 mmol/L 10/22/2013 3:51 AM TBR CALCIUM 9.6 8.6-10.3 mg/dL 10/22/2013 3:51 AM TBR PROTEIN, TOTAL 7.3 6.1-8.1 g/dL 10/22/2013 3:51 AM TBR ALBUMIN 4.7 3.6-5.1 g/dL 10/22/2013 3:51 AM TBR GLOBULIN,CALCULATED 2.6 1.9-3.7 g/dL 10/22/2013 3:51 AM TBR A/G RATIO 1.8 1.0-2.5 10/22/2013 3:51 AM TBR ALKALINE PHOSPHATE 62 40-115 U/L 10/22/2013 3:51 AM TBR AST 25 10-40 U/L 10/22/2013 3:51 AM TBR ALT 18 9-46 U/L 10/22/2013 3:51 AM TBR EGFR NON AFR AMERICAN 86 >=60 10/22/2013 3:51 AM TBR

UNITS: mL/min/1.73m2
EGFR AFRICAN AMERICAN 100 >=60 10/22/2013 3:51 AM TBR

UNITS: mL/min/1.73m2
WBC 5.2 3.8-10.8 Thous/mcL 10/22/2013 5:08 AM TBR
RBC 4.76 4.20-5.80 Mill/mcL 10/22/2013 5:08 AM TBR
HEMOGLOBIN 14.6 13.2-17.1 g/dL 10/22/2013 5:08 AM TBR
HCT 43.0 38.5-50.0 % 10/22/2013 5:08 AM TBR
MCV 90.5 80.0-100.0 fL 10/22/2013 5:08 AM TBR
MCH 30.6 27.0-33.0 pg 10/22/2013 5:08 AM TBR
MCHC 33.8 32.0-36.0 g/dL 10/22/2013 5:08 AM TBR
RDW 12.4 11.0-15.0 % 10/22/2013 5:08 AM TBR
PLATELETS COUNT 168 140-400 Thous/mcL 10/22/2013 5:08 AM TBR
MPV 9.4 7.5-11.5 fL 10/22/2013 5:08 AM TBR
DIFFERENTIAL SEE NOTE 10/22/2013 5:08 AM TBR

An instrument differential was performed.
TOTAL NEUTROPHILS,% 52.6 38-80 % 10/22/2013 5:08 AM TBR
TOTAL LYMPHOCYTES,% 34.5 15-49 % 10/22/2013 5:08 AM TBR
MONOCYTES,% 9.4 0-13 % 10/22/2013 5:08 AM TBR
EOSINOPHILS,% 3.0 0-8 % 10/22/2013 5:08 AM TBR
BASOPHILS,% 0.5 0-2 % 10/22/2013 5:08 AM TBR
NEUTROPHILS,ABSOLUTE 2735 1500-7800 Cells/mcL 10/22/2013 5:08 AM TBR
LYMPHOCYTES,ABSOLUTE 1794 850-3900 Cells/mcL 10/22/2013 5:08 AM TBR
MONOCYTES,ABSOLUTE 489 200-950 Cells/mcL 10/22/2013 5:08 AM TBR
EOSINOPHILS,ABSOLUTE 156 15-500 Cells/mcL 10/22/2013 5:08 AM TBR
BASOPHILS,ABSOLUTE 26 0-200 Cells/mcL 10/22/2013 5:08 AM TBR

TBR Test Performed By *Quest Diagnostics, Teterboro (One Malcolm Avenue, Teterboro, NJ, 07608, 8006311390, William E. Tarr, M.D.)

*** END OF FINAL LAB REPORT ***

Arduino magnet wire wrapping assitant

I’m wrapping my own magnetic coils for a project I’m working on and I need to wrap each coil 600 times. To help keep track of the count I made an assistant out of an Arduino and a photo resistor. In this test I wrap black tape around the chuck on a drill and then put a strip of white tape over it. Shining a light from underneath reflects off the white strip as it rotates and shines more brightly into the photocell. The Arduino uses this change in brightness to count how many rotations the drill makes and when it gets to the right amount an LED turns on. In the video example the light turns on after 10 rotations. Code is included below.

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