The accurate and precise transport of the small amounts of the liquid by the syringe pump is widely used in many fields. In this paper, an Arduino-based syringe pump is fabricated using the computer ...DVD (digital versatile disc) drive. For the fabrication of the syringe pump, low-cost electronic components such as an Arduino microcontroller, a stepper motor, a stepper motor driver, and a display are used. The tray-loading mechanism of the computer DVD drive (close/open mechanism of the tray for inserting/removing DVD) was used for the injection process. To provide the necessary force for the precise and accurate movement of the plunger of the syringe, we replaced the DC motor of the computer DVD drive with the stepper motor and the stepper motor driver. An Arduino code was developed to control the infusion process. Depending on the syringe dimension (inner diameter and barrel length), the stepper motor (angular resolution), and the motor driver (microstepping mode), the code can be modified by using the Arduino software. The syringe pump infuses the water in the flow rates from 0.005 (mL/min) to 1 (mL/min) with a maximum of 10 μL difference between the mean measured volume and the infused volume. The fabricated syringe pump does not require the complex mechanical components that are used in conventional syringe pumps. The project provides instructions for building and testing a syringe pump and enables the students to fabricate a low-cost, open-source syringe pump using the recycled parts of the computer DVD drive for less than $30. As a result, the students will increase their hardware and software skills by completing the project.
Purpose
Given the high uncertainty in the quality perception of experiential products, manufacturers use signals to influence consumers’ decisions. In the movie industry, literature shows that ...performance of the main channel (e.g. cinema) strongly influences the performance of auxiliary channels (e.g. DVDs). The success of a movie in the home country is also to be resonated by its good performance in host countries. However, the cultural contingency of these success-breeds-success (SBS) effects has not been examined. This paper aims to test the influence of cultural values on the SBS effects across channels and countries.
Design/methodology/approach
Borrowing concepts from the signaling literature and analyzing DVD sales data from six international markets using a multilevel mixed-effects model, the study finds that culture plays a significant role to influence both SBS effects.
Findings
In countries with low power distance, short-term orientation and high indulgence, consumers who purchase from auxiliary channels are more likely to be influenced by the box office performance of movies. Meanwhile, cultural distance between the home and host nations significantly decreases the cross-national SBS effect.
Research limitations/implications
The findings are likely to be generalized to online auxiliary channels of movies, but empirical testing is required to ensure that no major adaptation is required in the process. Future research can also extend the framework of this paper to include more countries into the analysis and investigate cultural variables beyond Hofstede’s dimensions.
Practical implications
This paper suggests that the SBS effects may vary across nations. When managers plan for the sequential distributions of experiential products, the cultural values of target markets should be considered to decrease the uncertainty in sales prediction.
Originality/value
This paper contributes to the existing literature by investigating the international auxiliary channels of movies and incorporating cultural values into the framework of sequential distributions. To the best of the authors’ knowledge, this study is the first to test the links between the main and auxiliary channels from an international marketing perspective.
We examine the ancillary revenue for movies, specifically its revenue from DVD sales. We compared the sales and returns to investment for DVD among different categories of DVD titles/movies based on ...their movie production budgets. We find that while bigger budget movies will sell more DVDs they performed poorer when it comes to returns to investment (ROI).
In this work, we reported an effective method for the synthesis of a multirecognition magnetic molecularly imprinted polymer (MMIP) with atom transfer radical polymerization (ATRP), using ...2,4-diamino-6-methyl-1,3,5-triazine as pseudo-template. The resulting MMIP was characterized in detail by Fourier transform-infrared (FT-IR) spectra, scanning electron microscopy (SEM), thermogravimetic analysis (TGA), and vibrating sample magnetometry (VSM). These results indicated the successful synthesis of MMIP with sufficient thermal stability and magnetic properties. The adsorption experiments were carried out to evaluate the specific selectivity of MMIP related to the spatial structure of target molecules. The MMIP exhibited multirecognition ability and excellent binding capability for melamine (MEL), cyromazine (CYR), triamterene (TAT), diaveridine (DVD), and trimethoprim (TME), and the apparent maximum number of binding sites (
Q
max
) was 77.5, 75.2, 72.5, 69.9, and 70.4 μmol g
−1
, respectively. The multirecognition MMIP not only possessed adequate magnetic responsiveness for fast separation but also avoided the risk of template leakage on trace component analysis. Therefore, it was suitable for serving as a magnetic solid-phase extraction (MSPE) adsorbent. MSPE coupled with high-performance liquid chromatography analysis was applied to enrich and separate five target molecules from three samples. Recoveries for all target molecules ranged from 81.6 to 91.5% with relative standard deviations of no more than 4.1% (
n
= 3).
Graphical abstract
Multirecognition property of magnetic molecularly imprinted polymer prepared with pseudo template
Progress in whole-genome sequencing using short-read (e.g., <150 bp), next-generation sequencing technologies has reinvigorated interest in high-resolution physical mapping to fill technical gaps ...that are not well addressed by sequencing. Here, we report two technical advances in DNA nanotechnology and single-molecule genomics: (1) we describe a labeling technique (CRISPR-Cas9 nanoparticles) for high-speed AFM-based physical mapping of DNA and (2) the first successful demonstration of using DVD optics to image DNA molecules with high-speed AFM. As a proof of principle, we used this new "nanomapping" method to detect and map precisely BCL2-IGH translocations present in lymph node biopsies of follicular lymphoma patents. This HS-AFM "nanomapping" technique can be complementary to both sequencing and other physical mapping approaches.
In 'Parti Liyani v Public Prosecutor' 2020 SGHC 187, the High Court held that a person cannot commit theft of an item that has been discarded by its owner. This note suggests that the High Court's ...underlying premise for that position may benefit from reconsideration in a future case, as it did not take into account certain important legal nuances. In particular, the court could have considered relevant authorities (both foreign and local) on the law of abandonment by trashing.
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