top of page

Cooking Group

Public·54 members
Karen Timofeev
Karen Timofeev

2 : Palm Of The Hand


The hand menu is one of the most unique UX patterns in HoloLens 2. It allows you to quickly bring up hand-attached UI. Since it's accessible anytime and can be shown and hidden easily, it's great for quick actions.




2 : Palm of the Hand



Because of the close distance between a hand-locked menu and the eyes, and the tendency for users to focus on a relatively small visual area at any time (the attentional cone of vision is roughly 10 degrees), we recommend keeping the number of buttons small. Based on our exploration, one column with three buttons works well by keeping all the content within the field of view (FOV) even when a user moves their hands to the center of the FOV.


Raising an arm and maintaining the position could easily cause arm fatigue. Use a hand-locked method for the menu requiring a short interaction. If your menu is complex and requires extended interaction times, consider using world-locked or body-locked instead.


Menus should billboard towards the opposite shoulder and middle of the head: This allows a natural hand move to interact with the menu with the opposite hand and avoids any awkward or uncomfortable hand positions when touching buttons.


Don't assume both of the user's hands are always available. Consider a wide range of contexts when one or both hands aren't available, and make sure your design accounts for those situations. To support a one-handed hand menu, you can try transitioning the menu placement from hand-locked to world-locked when the hand flips (goes palm down). For hands-free scenarios, consider using a voice command to invoke the hand menu.


When the menu is world-locked, make sure to provide a way to move the menu, and close the menu when it's no longer needed. Make the menu movable by providing handles on the sides or top of menu. Add a close button to allow the menu to close. Allow for the menu to reattach to the hand when the user hand faces the user. We also recommend requiring that the users gaze at their hand to prevent false activations (see below).


If you use just palm-up as an event to trigger the hand menu, it may accidentally appear when you don't need it (false-positive), because people move their hands both intentionally (for communication and object manipulation) and unintentionally. To reduce false activations, add an extra step besides the palm-up event to invoke the hand menu (such as fully opened fingers, or the user intentionally gazing at their hand).


By requiring the user to gaze at their hand (either with eye gaze or head gaze), it prevents false activations because of the user having to direct their attention to the hand as a secondary activation step (with a tunable distance threshold used to allow for user comfort).


B. Ulnar above handThis location is comfortable for users because they don't need to raise their arm too much to interact with the hand menu. We recommend placing menus 13 cm above the palm and align the buttons inside the ulnar palm. Read more about the optimal button sizeFor technical reasons, we recommend this location with one required implementation: the developer will need to freeze the menu once the user's opposite hand gets close to interacting with it. This will avoid jitteriness from overlapping hands and also allows for a faster targeting of the buttons.HoloLens 2 cameras identify hands accurately when they're separate from each other. Any overlapping hands can cause hand menus move away from the anchor location.


MRTK provides scripts and example scenes for the hand menu. The HandConstraintPalmUp solver script allows you to attach any objects to the hands with various configurable options. MRTK's hand menu examples include useful options such as flat palm and gaze requirement for preventing false activation.


In our study the mean hand area in adult male was 146.50 cm2, while in female it was 132.42 cm2. The mean hand area for combined male and female was 139.46 cm2. There is statistically significant difference in the hand area between male and female (P


The mean palm area in adult male was 77.85 cm2 and in adult female was 73.65 cm2. The mean palm area for combined male and female was 75.75 cm2. There is statistically significant difference in palm area between male and female (P


The hand ratio in adult male and female was 0.92% and 0.92%, respectively, and the mean hand ratio for combined male and female was 0.92%. There was no significant difference between the hand ratio in adult male and female (P > 0.05) [Table 3].


The palm ratio in adults male and female was 0.49% and 0.51%, respectively. The mean palm ratio for combined male and female was 0.50%. There was significant difference in palm ratio been male and female (P


In our study the mean hand area in male and female children were 86.51 cm2 and 84.77 cm2 respectively. Combined value in male and female child was 85.64 cm2. The male and female values are comparable with no significant difference (P > 0.05) [Table 2].


The mean palm area in male and female child was 51.70 cm2 and 49.65 cm2. Combined value in male and female child was 50.67 cm2. The mean palm area of male and female child is comparable with no statistically significant difference (P > 0.05) [Table 2].


The hand ratio in male and female children was 1.06% and 1.06%, respectively. The combined value in male and female child was 1.06%. This study also reveals that the hand ratio in case of male and female children was comparable with (P > 0.05) [Table 3].


In our study, the adult hand ratio was 0.92% compared to 0.77% by Perry[9] and 0.78% by Amirsheybani.[6] The average area of hand was 0.81% in males and 0.67% in females by Rossiter.[10] In our study, the average area of hand was 0.92% in male and in female both. The difference between male and female hand ratio was statistically significant in the study by Rossiter, while it was not significant in our study.


Moreover, the palm ratio in adults male and female was 0.49% and 0.51%, respectively, with significant difference between male and female. Rossiter[10] also found the significant difference in the palm ratio between male and female.


In our study, the hand ratio in children was 1.065% with no significant difference between male and female as compared to 0.94% by Nagel[11] and 0.82% by Perry[9] and 0.87% in the study by Amirsheybani.[6] The palm ratio in children was 0.635% in our study with no significant difference between male and female as compared to 0.52% by Nagel[11] and 0.45% in the study by Perry.[9]


Amirsheybani[6] used integrated planimeter to calculate hand and palm surface area from 800 Caucasian volunteers ranged in age from 2 to 89 years. The BSA was determined by using Dubois's and Gehan and George's formula. The palmar surface of the hand corresponds to 0.78 0.08 percent of the BSA in adults. In children the palmar surface of the hand was 0.87 0.06.


Perry[9] studied 20 adult and 10 children (age undocumented). BSA was calculated by the method of Gehan and George. The area of hand projection was determined using the computer program. Among the adults the means of palm and whole hand surface area with 95% confidence intervals were 0.41% (0.37 to 0.43) and 0.77% (0.74 to 0.80) respectively. Among the children the corresponding values were 0.45% (0.42 to 0.48%) and 0.82% (0.78 to 0.87%). For the two groups combined the mean projected whole hand area was 0.79% (0.76 to 0 .81%).


Rossiter[10] also published a study of 70 (36 male and 34 female) adult subject in which TBSA was calculated by standard nomogram and hand surface area was calculated using hand outline drawn on a piece of graph paper. The areas were calculated by counting the squares enclosed in the outlines. They found that the average area of palm was 0.52% and 0.43% of TBSA in males and females, respectively. The average area of hand was 0.81% in males and 0.67% in females.


Nagel[11] calculated the TBSA by standard nomogram and hand and palm surface area was calculated using photocopy of the hand. They found that in 91 children the average area of hand was 0.94% (95% CI) and the area of palm was 0.52% (95% CI) of TBSA.


Sheridan[12] measured the palmar surface of the hand in 69 patients. They concluded that the surface of the palm averaged 0.52% of TBSA and the palmar surface the hand 0.85% of TBSA. However, they did not find any correlation with age or sex.


The crease is most often referred to as a single palmar crease. The older term "simian crease" is not used much anymore, since it tends to have a negative meaning (The word "simian" refers to a monkey or ape).


There are typically two creases in the palm, but in some people, only one crease is present. A single palmar crease occurs in about 1 out of 30 people, but is also frequently associated with other conditions such as Down syndrome, Aarskog syndrome or fetal alcohol syndrome.


A single palmar crease appears in about 1 out of 30 people. Males are twice as likely as females to have this condition. Some single palmar creases may indicate problems with development and be linked with certain disorders.


An infant with a single palmar crease may have other symptoms and signs that, when taken together, define a specific syndrome or condition. Diagnosis of that condition is based on a family history, medical history, and complete physical exam.


Our CZ Shadow 2 palm swell grips are made thin at the top to accommodate the Shadow 2's higher grip toward the axis of the barrel. The Bogies dimple texture is very aggressive and performs well in the most extreme conditions.


These grips are significantly thicker than the stock grips. With the stock aluminum grips, we measure the thickness of the gun across the grips at 1.135". With our palm swell grips, we measure the thickness of the gun across the peak of the grips at 1.475". 041b061a72


About

Welcome to the group! You can connect with other members, ge...

Members

Group Page: Groups_SingleGroup
bottom of page