Division C Events

Division C Events

admin Mon, 2008-08-11 16:20

Questions must be directed toward the rules. We cannot pre-judge your device by answering questions on whether it complies.

Earth & Space Science

Earth & Space Science

admin Tue, 2008-08-12 08:52

Astronomy

Astronomy

admin Tue, 2008-08-12 08:52

We are having trouble getting DS9 Software to run with Cygwin64. What version of DS9 will we need to know how to use for the event? Since we don't have internet access at the competitions we will not be able to use the JS9.

We are having trouble getting DS9 Software to run with Cygwin64. What version of DS9 will we need to know how to use for the event? Since we don't have internet access at the competitions we will not be able to use the JS9.

admin Thu, 2016-11-03 17:36

Because the event will be pen and paper, only printouts (or screenshots) of DS9 will be used. As a result, teams do not have to have DS9 on their computers to compete. Instead, if you cannot download DS9 simply use JS9 (the online tool) to practice for the competition. What is tested instead is students familiarity with the programs output and how to analyze/interpret that output. So however you get it to run on your personal, school, or library computers (and whichever version you use) is really a fine way to gain that understanding.

Dynamic Planet - Div C

Dynamic Planet - Div C

admin Tue, 2008-08-12 08:53

Are the basins limited to only those mentioned in parentheses, or can others be included as well?

Are the basins limited to only those mentioned in parentheses, or can others be included as well?

ceann Sat, 2017-02-11 15:10
The test should be limited to the types of basins listed in the parentheses.

Remote Sensing

Remote Sensing

admin Tue, 2008-08-12 08:53

Rocks and Minerals

Rocks and Minerals

admin Tue, 2008-08-12 08:53

Inquiry & Nature of Science

Inquiry & Nature of Science

admin Tue, 2008-08-12 08:53

Experimental Design - Div C

Experimental Design - Div C

admin Tue, 2008-08-12 08:54

Game On

Game On

admin Tue, 2008-08-12 08:54

Hydrogeology

Hydrogeology

admin Tue, 2008-08-12 08:54

Write It Do It - Div C

Write It Do It - Div C

admin Tue, 2008-08-12 08:54

Life, Personal & Social Science

Life, Personal & Social Science

admin Tue, 2008-08-12 08:55

Invasive Species - Div C

Invasive Species - Div C

admin Tue, 2008-08-12 08:56

Ecology - Div C

Ecology - Div C

admin Tue, 2008-08-12 08:55

"Simpson Index" can be loosely applied to 3 different values (and calculations) depending on the author/source: Simpson's Index, Simpson's Index of Diversity and Simpson's Reciprocal Index. This should be clarified.

"Simpson Index" can be loosely applied to 3 different values (and calculations) depending on the author/source: Simpson's Index, Simpson's Index of Diversity and Simpson's Reciprocal Index. This should be clarified.

admin Thu, 2016-11-03 17:39

Students should be familiar with all three. If used for the National competition the national supervisor will specify which is being used. We have chosen to define the Simpson index, p as the proportion (n/N) of individuals of one particular species found (n) divided by the total number of individuals found (N), Σ is still the sum of the calculations, and s is the number of species. This information can be found on the files distributed at coaches clinics and will also be on the SO website once the clinics are over.

Disease Detectives - Div C

Disease Detectives - Div C

admin Tue, 2008-08-12 08:55

Anatomy and Physiology

Anatomy and Physiology

admin Tue, 2008-08-12 08:55

Microbe Mission - Div C

Microbe Mission - Div C

admin Thu, 2009-09-10 15:20

Physical Science & Chemistry

Physical Science & Chemistry

admin Tue, 2008-08-12 08:56

Chem Lab

Chem Lab

admin Fri, 2014-09-12 11:10

Hovercraft - Div C

Hovercraft - Div C

admin Fri, 2011-10-28 10:40

Can teams use a remote control to start and/or stop their hovercraft?

Can teams use a remote control to start and/or stop their hovercraft?

admin Mon, 2016-11-07 19:17

No, as any remote control system would violate either the dimension requirements or the prohibition on integrated circuits.

Can we connect two 9V batteries in parallel? Voltage across any points will not exceed 9V as they are connected in parallel. This just gives us higher current capacity to drive two motors.

Can we connect two 9V batteries in parallel? Voltage across any points will not exceed 9V as they are connected in parallel. This just gives us higher current capacity to drive two motors.

admin Mon, 2016-11-07 19:10

Yes, this would be allowed.

Description state "MAY construct". Can students use commercial kits or models or should they be built "from scratch".

Description state "MAY construct". Can students use commercial kits or models or should they be built "from scratch".

admin Mon, 2016-11-07 19:05

Commercial kits may be used, as long as the SO building policy is followed: https://www.soinc.org/building_tools_policy

Do commercially available switches, such as dimmer switches, count as integrated circuits?

Do commercially available switches, such as dimmer switches, count as integrated circuits?

admin Mon, 2016-11-07 19:56

It depends on the specific switch. Some switches are purely mechanical (i.e. utilize a potentiometer) and are allowed. Others are digital (i.e. utilize an integrated circuit) and are not allowed.

For the definition of a "cushion of air": does the air have to have a way out of the cushion on the bottom or sides, or can it be designed similar to an air mattress?

For the definition of a "cushion of air": does the air have to have a way out of the cushion on the bottom or sides, or can it be designed similar to an air mattress?

admin Mon, 2016-11-07 20:10

Yes because it is not hovering unless air is coming out. The air must have some way of escaping (i.e. it should need to be actively replenished for the device to work, not just be a sealed inflatable chamber).

How high must the hovercraft hover?

How high must the hovercraft hover?

admin Mon, 2016-11-07 20:07

There is no set distance it must hover. If an event supervisor, from a normal observation point without having to get up and close to the hovercraft, can visually see it move down when pushed, then yes it levitates.

In Section 2, paragraph 5, sub paragraph f, the rules mention a target time and then identify it for C only. In section 3, paragraph 6, subparagraph b, the scoring says the time score gives a calculation involving a target time. Please clarify.

In Section 2, paragraph 5, sub paragraph f, the rules mention a target time and then identify it for C only. In section 3, paragraph 6, subparagraph b, the scoring says the time score gives a calculation involving a target time. Please clarify.

admin Mon, 2016-11-07 19:04

5.f. doesn't identify the target time for C only. It only mentions that the target length will be announced for Div. C only (since Div. B already knows the target length). The target time concept applies to both B and C. The reference to Div C is for the variable length that must be announced.

Is a breadboard with resistors and/or transformers considered and integrated circuit?

Is a breadboard with resistors and/or transformers considered and integrated circuit?

admin Mon, 2016-11-07 19:19

No. A breadboard with discrete resistors and/or basic transformers is not an integrated circuit. Note though that some types of resistors and transformers ARE integrated circuits and hence are not allowed.

Is an Arduino an integrated circuit?

Is an Arduino an integrated circuit?

admin Mon, 2016-11-07 19:29

Yes, an Arduino contains many integrated circuits and is not legal.

Is the maximum dimensions of the skirt 19.5 x 30 cm when the hovercraft is inflated or deflated? Can the skirt be larger than those dimensions when the motor is not running?

Is the maximum dimensions of the skirt 19.5 x 30 cm when the hovercraft is inflated or deflated? Can the skirt be larger than those dimensions when the motor is not running?

admin Mon, 2016-11-07 20:25

The maximum dimension of the skirt is the same as the device, 19.5 cm wide x 30 cm long, both inflated and deflated. Students may tuck the uninflated skirt under the device prior to inflation.

Is the total voltage for the hovercraft 9V, or is 9 volts the maximum rated for each circuit? For example, may I have a separate 9V battery for each motor if they are not linked?

Is the total voltage for the hovercraft 9V, or is 9 volts the maximum rated for each circuit? For example, may I have a separate 9V battery for each motor if they are not linked?

admin Mon, 2016-11-07 19:12

Yes, multiple batteries may be used as long as they are not connected in such a way that the voltage exceeds 9 V in any circuit. Separate 9 V circuits are allowed.

Is there an interval for the target time of the competition. Ex-- between 5.0-25.0s in intervals of 1 second

Is there an interval for the target time of the competition. Ex-- between 5.0-25.0s in intervals of 1 second

admin Mon, 2016-11-07 19:53

No

Please define what the propeller shielding is (1/4 in diameter?).

Please define what the propeller shielding is (1/4 in diameter?).

admin Mon, 2016-11-07 20:28

The propeller(s) must be enclosed in such a way that there are no holes bigger than 1/4" in diameter in the enclosure. A 1/4" dowel rod must not be able to penetrate the material.

The 1/4" or larger dowel. Can any material be used (i.e. wood, plastic, metal), and must it be solid or can it be an optically opaque tube meeting the specified dimensions and purpose of breaking a light beam?

The 1/4" or larger dowel. Can any material be used (i.e. wood, plastic, metal), and must it be solid or can it be an optically opaque tube meeting the specified dimensions and purpose of breaking a light beam?

admin Mon, 2016-11-14 21:25

The dowel can be any material, but by definition a dowel is a solid cylindrical rod, hence a straw is not allowed.

The clarification on this rule is not entirely clear. If I found a commercially-available product containing a brushless motor attached to a fan, must it be labeled as a "cooling fan" to be legal?

The clarification on this rule is not entirely clear. If I found a commercially-available product containing a brushless motor attached to a fan, must it be labeled as a "cooling fan" to be legal?

admin Mon, 2016-11-07 19:26

No. As long as it is a fan typically used for cooling electronics or computers it does not need to be labeled as such.

The rules say that Brushless motors and integrated circuits are not permitted, does this just refer to integrated circuits to control motors or things like adjustable voltage regulators and arduinos.

The rules say that Brushless motors and integrated circuits are not permitted, does this just refer to integrated circuits to control motors or things like adjustable voltage regulators and arduinos.

admin Mon, 2016-11-07 19:55

Note there is an official rules clarification related to this, available at: https://www.soinc.org/official_rules_clarif The integrated circuit prohibition refers to all components (including voltage regulators / arduinos) other than those specified in the rules clarification.

What constitutes an integrated circuit?(ie. are resistors, capacitors, transistors allowed? Operational Amplifiers?)

What constitutes an integrated circuit?(ie. are resistors, capacitors, transistors allowed? Operational Amplifiers?)

admin Mon, 2016-11-07 19:27

An integrated circuit is a circuit in which all or some of the circuit elements are inseparably associated and electrically interconnected so that it is considered to be indivisible for the purposes of construction and commerce. Most resistors and capacitors are not integrated circuits. Nearly all transistors and op-amps are integrated circuits.

Forensics

Forensics

admin Mon, 2014-09-08 13:46

Materials Science

Materials Science

admin Tue, 2008-08-12 08:56

Optics

Optics

admin Mon, 2014-09-08 13:47

Wind Power - Div C

Wind Power - Div C

admin Tue, 2008-08-12 08:57

Technology & Engineering

Technology & Engineering

admin Tue, 2008-08-12 08:58

Helicopters

Helicopters

admin Tue, 2008-08-12 08:59

What defines a single bladed rotor? Would a single stick of wood projecting out horizontally from the body be considered a "lifting surface" that "rotates on a common path around a vertical axis"?

What defines a single bladed rotor? Would a single stick of wood projecting out horizontally from the body be considered a "lifting surface" that "rotates on a common path around a vertical axis"?

admin Mon, 2016-11-14 21:21

No, that would not be considered a lifting surface. To be considered a lifting surface, it must contribute lift to the overall flying assembly. An easy way to demonstrate that would be to demonstrate flying it with and without the surface, if the surface is not present then the flight would be significantly different.

Robot Arm

Robot Arm

admin Thu, 2009-09-10 15:27

Can the end effectors be completely mobile on their own, without power from the arm. i.e. a small RC car attached to the base via a tether to the base?

Can the end effectors be completely mobile on their own, without power from the arm. i.e. a small RC car attached to the base via a tether to the base?

ceann Sun, 2016-12-18 21:08
No. This would not meet the definition of a robotic arm. Definition (checked in multiple sources) A robot arm is a series of rigid elements linked by rotary or translation joints. The tether is not a rigid link, nor is it a rotary or translational joint.

Towers - Div C

Towers - Div C

admin Thu, 2009-09-10 15:27

For the load scored bonus, the tower must be clear of the 29.0 cm diameter circle. Is this during setup only or also during loading (prior to tower failure)?

For the load scored bonus, the tower must be clear of the 29.0 cm diameter circle. Is this during setup only or also during loading (prior to tower failure)?

admin Thu, 2016-12-01 22:21

The Load Scored Bonus is awarded only if the tower is outside of the 29.0 cm diameter circle through the entire testing. If the tower sags inside of the 29.0 cm circle during testing but the bucket remains off the ground and the tower is still outside the 20.0 x 20.0 cm opening on the Test Base, testing will continue until failure occurs as defined in the rules.

Electric Vehicle

Electric Vehicle

admin Tue, 2008-08-12 08:59

Clearly batteries must be less than 9V, but can we use step-up regulator to generate 12 V?

Clearly batteries must be less than 9V, but can we use step-up regulator to generate 12 V?

admin Mon, 2016-11-14 20:22

No, the voltage across any two points ≤ 9 V as stated by the manufacturer labels. If a step-up regulator steps a 9V battery up to 12V, this would be a violation.

How is "leading part of the vehicle" defined? Is it the forward-most part in the direction of the vehicle's travel or the closest part to the Target Point?

How is "leading part of the vehicle" defined? Is it the forward-most part in the direction of the vehicle's travel or the closest part to the Target Point?

admin Fri, 2016-11-04 09:06

The "leading part of the vehicle" is the forward-most part in the direction of the vehicle's travel.

Is the vehicle permitted to be propelled backwards outside of the run time (as defined in 5k)?

Is the vehicle permitted to be propelled backwards outside of the run time (as defined in 5k)?

admin Thu, 2016-11-03 17:42

No. The rule is clear. ...please see rule 5.g.

When it says that the vehicle cannot be propelled backward, does that apply to recoil which occurs when a vehicle stops, specifically if the vehicle moves backwards despite the actual propulsion only being forwards?

When it says that the vehicle cannot be propelled backward, does that apply to recoil which occurs when a vehicle stops, specifically if the vehicle moves backwards despite the actual propulsion only being forwards?

ceann Sat, 2017-02-11 15:52
No, the minor recoil when a vehicle stops is not considered backwards propulsion. Ultimately it will be up to the event supervisor to determine if this movement was intentional to gain a benefit to the team.